10-K

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

(Mark One)

þ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2010

OR

o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from                      to                     

Commission file numbers:	1-13130 (Liberty Property Trust)
	1-13132 (Liberty Property Limited Partnership)

LIBERTY PROPERTY TRUST
LIBERTY PROPERTY LIMITED PARTNERSHIP

(Exact Names of Registrants as Specified in Their Governing Documents)

MARYLAND (Liberty Property Trust)	23-7768996
PENNSYLVANIA (Liberty Property Limited Partnership)	23-2766549
(State or Other Jurisdiction	(I.R.S. Employer
of Incorporation or Organization)	Identification Number)
500 Chesterfield Parkway
Malvern, Pennsylvania	19355
(Address of Principal Executive Offices)	(Zip Code)

Registrants’ Telephone Number, including Area Code (610) 648-1700

Securities registered pursuant to Section 12(b) of the Act:

	NAME OF EACH EXCHANGE
TITLE OF EACH CLASS	ON WHICH REGISTERED
Common Shares of Beneficial Interest,
$0.001 par value
(Liberty Property Trust)	New York Stock Exchange

Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark if the Registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.

YES þ NO o

Indicate by check mark if the Registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Exchange Act.

YES o NO þ

Indicate by check mark whether the Registrants (1) have filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the Registrants were required to file such reports) and (2) have been subject to such filing requirements for the past ninety (90) days.

YES þ NO o

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that registrant was required to submit and post such files.)

YES þ NO o

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulations S-K is not contained herein, and will not be contained, to the best of the Registrants’ knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. þ

Indicate by check mark whether the Registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company. (See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act). (Check one):

Large Accelerated Filer þ	Accelerated Filer o	Non-Accelerated Filer o	Smaller Reporting Company o
		(Do not check if a smaller reporting company)

Indicate by check mark if the Registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

YES o NO þ

The aggregate market value of the Common Shares of Beneficial Interest, $0.001 par value (the “Common Shares”), of Liberty Property Trust held by non-affiliates of Liberty Property Trust was $3.3 billion, based upon the closing price of $28.85 on the New York Stock Exchange composite tape on June 30, 2010. Non-affiliate ownership is calculated by excluding all Common Shares that may be deemed to be beneficially owned by executive officers and trustees, without conceding that any such person is an “affiliate” for purposes of the federal securities laws.

Number of Common Shares outstanding as of February 22, 2011: 114,568,965

Documents Incorporated by Reference

Portions of the proxy statement for the annual meeting of shareholders of Liberty Property Trust to be held in May 2011 are incorporated by reference into Part III of this Form 10-K.

INDEX

	Page
Part I
Item 1. Business		4
Item 1A. Risk Factors		8
Item 1B. Unresolved Staff Comments		16
Item 2. Properties		16
Item 3. Legal Proceedings		19
Item 4. [Removed and Reserved]		19
Part II
Item 5. Market for Registrants’ Common Equity, Related Shareholder Matters and Issuer Purchases of Equity Securities		20
Item 6. Selected Financial Data		22
Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations		24
Item 7A. Quantitative and Qualitative Disclosures About Market Risk		39
Item 8. Financial Statements and Supplementary Data		39
Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure		124
Item 9A. Controls and Procedures		124
Item 9B. Other Information		125
Part III
Item 10. Trustees, Executive Officers and Corporate Governance		126
Item 11. Executive Compensation		126
Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Shareholder Matters		126
Item 13. Certain Relationships and Related Transactions, and Trustee Independence		126
Item 14. Principal Accountant Fees and Services		126
Part IV
Item 15. Exhibits and Financial Statement Schedules		127
Signatures for Liberty Property Trust		137
Signatures for Liberty Property Limited Partnership		138
Exhibit Index		139
Amended and Restated Schedule A
First Supplemental Indenture, dated as of September 27, 2010
Statement re: Computation of Ratios
Subsidiaries
Consent of Ernst and Young LLP relating to the Trust
Consent of Ernst and Young LLP relating to the Operating Partnership
Certifications of the Chief Executive Officer
Certifications of the Chief Financial Officer
Certifications of the Chief Executive Officer, in its capacity as the general partner
Certifications of the Chief Financial Officer in its capacity as the general partner
Certifications of the Chief Executive Officer, required under Rule 13a-14(b)
Certifications of the Chief Financial Officer, required under Rule 13a-14(b)
Certifications of the Chief Executive Officer, in its capacity as the general partner, required by Rule 13-a-14(b)
Certifications of the Chief Financial Officer, in its capacity as the general partner, required by Rule 13a-14(b)
EX-101 INSTANCE DOCUMENT
EX-101 SCHEMA DOCUMENT
EX-101 CALCULATION LINKBASE DOCUMENT
EX-101 LABELS LINKBASE DOCUMENT
EX-101 PRESENTATION LINKBASE DOCUMENT
EX-101 DEFINITION LINKBASE DOCUMENT

2

The Private Securities Litigation Reform Act of 1995 provides a “safe harbor” for forward-looking statements. Certain information included in this Annual Report on Form 10-K and other materials filed or to be filed by the Company (as defined herein) with the Securities and Exchange Commission (“SEC”) (as well as information included in oral statements or other written statements made or to be made by the Company) contain statements that are or will be forward-looking, such as statements relating to rental operations, business and property development activities, joint venture relationships, acquisitions and dispositions (including related pro forma financial information), future capital expenditures, financing sources and availability, litigation and the effects of regulation (including environmental regulation) and competition. These forward-looking statements generally are accompanied by words such as “believes,” “anticipates,” “expects,” “estimates,” “should,” “seeks,” “intends,” “planned,” “outlook” and “goal” or similar expressions. Although the Company believes that the expectations reflected in such forward-looking statements are based on reasonable assumptions, the Company can give no assurance that its expectations will be achieved. As forward-looking statements, these statements involve important risks, uncertainties and other factors that could cause actual results to differ materially from the expected results and, accordingly, such results may differ from those expressed in any forward-looking statements made by, or on behalf of the Company. The Company assumes no obligation to update or supplement forward looking statements that become untrue because of subsequent events. These risks, uncertainties and other factors include, without limitation, uncertainties affecting real estate businesses generally (such as entry into new leases, renewals of leases and dependence on tenants’ business operations), risks relating to our ability to maintain and increase property occupancy and rental rates, risks relating to the recent credit crisis and economic disruption, risks relating to construction and development activities, risks relating to acquisition and disposition activities, risks relating to the integration of the operations of entities that we have acquired or may acquire, risks relating to joint venture relationships and any possible need to perform under certain guarantees that we have issued or may issue in connection with such relationships, possible environmental liabilities, risks relating to leverage and debt service (including availability of financing terms acceptable to the Company and sensitivity of the Company’s operations and financing arrangements to fluctuations in interest rates), dependence on the primary markets in which the Company’s properties are located, the existence of complex regulations relating to status as a real estate investment trust (“REIT”) and the adverse consequences of the failure to qualify as a REIT, risks relating to litigation and the potential adverse impact of market interest rates on the market price for the Company’s securities. See “Management’s Discussion and Analysis of Financial Condition and Results of Operations — Forward-Looking Statements.”

3

PART I

ITEM 1. BUSINESS

The Company

Liberty Property Trust (the “Trust”) is a self-administered and self-managed Maryland real estate investment trust (a “REIT”). Substantially all of the Trust’s assets are owned directly or indirectly, and substantially all of the Trust’s operations are conducted directly or indirectly, by its subsidiary, Liberty Property Limited Partnership, a Pennsylvania limited partnership (the “Operating Partnership” and, together with the Trust and their consolidated subsidiaries, the “Company”).

The Company completed its initial public offering in 1994 to continue and expand the commercial real estate business of Rouse & Associates, a Pennsylvania general partnership, and certain affiliated entities (collectively, the “Predecessor”), which was founded in 1972. As of December 31, 2010, the Company owned and operated 345 industrial and 292 office properties (the “Wholly Owned Properties in Operation”) totaling 65.2 million square feet. In addition, as of December 31, 2010, the Company owned 1,347 acres of developable land, substantially all of which is zoned for commercial use. Additionally, as of December 31, 2010, the Company had an ownership interest, through unconsolidated joint ventures, in 48 industrial and 50 office properties totaling 14.4 million square feet (the “JV Properties in Operation” and, together with the Wholly Owned Properties in Operation, the “Properties in Operation”) and 627 acres of developable land, substantially all of which is zoned for commercial use.

The Company provides leasing, property management, development and other tenant-related services for the Properties. The industrial Properties consist of a variety of warehouse, distribution, service, assembly, light manufacturing and research and development facilities. They include both single-tenant and multi-tenant facilities, with most designed flexibly to accommodate various types of tenants, space requirements and industrial uses. The Company’s office Properties are multi-story and single-story office buildings located principally in suburban mixed-use developments or office parks. Substantially all of the Properties are located in prime business locations within established business communities. In addition, the Company, individually or through joint ventures, owns urban office properties in Philadelphia and Washington, D.C. The Company’s strategy with respect to product and market selection is expected generally to favor metro-office, multi-tenant industrial and industrial-flex properties and markets with strong demographic and economic fundamentals. To the extent deemed consistent with the Company’s strategy and under appropriate circumstances the Company intends to reduce its ownership of suburban office properties.

The Trust is the sole general partner and also a limited partner of the Operating Partnership, owning 96.7% of the common equity of the Operating Partnership at December 31, 2010. The common units of limited partnership interest in the Operating Partnership (the “Common Units”), other than those owned by the Trust, are exchangeable on a one-for-one basis (subject to anti-dilution protections) for the Trust’s Common Shares of Beneficial Interest, $0.001 par value per share (the “Common Shares”). As of December 31, 2010, the Common Units held by the limited partners were exchangeable for 3.9 million Common Shares. The Company has issued several series of Cumulative Redeemable Preferred Units of the Operating Partnership (the “Preferred Units”). The outstanding Preferred Units of each series are exchangeable on a one-for-one basis after stated dates into a corresponding series of Cumulative Redeemable Preferred Shares of the Trust. The ownership of the holders of Common and Preferred Units is reflected on the Trust’s financial statements as a component of total equity as “non-controlling interest — operating partnership.”

In addition to this Annual Report on Form 10-K, the Company files with or furnishes to the SEC periodic and current reports, proxy statements and other information. The Company makes these documents available on its website, www.libertyproperty.com, free of charge, as soon as reasonably practicable after such material is electronically filed with, or furnished to, the SEC. Any document the Company files with or furnishes to the SEC is available to read and copy at the SEC’s Public Reference Room at 100 F Street, NE, Room 1580, Washington, D.C. 20549. Further information about the public reference facilities is available by calling the SEC at (800) SEC-0330. These documents also may be accessed on the SEC’s website, http://www.sec.gov.

Also posted on the Company’s website is the Company’s Code of Conduct, which applies to all of its employees and also serves as a code of ethics for its chief executive officer, chief financial officer and persons performing similar functions. The Company will send the Code of Conduct, free of charge, to anyone who requests a copy in writing from its Investor Relations Department at the address set forth on the cover of this filing. The Company intends to satisfy the disclosure requirement under Item 5.05 of Form 8-K regarding any amendments to or waivers of the Code of Conduct by posting the required information in the Corporate Governance section of its website.

4

Management and Employees

The Company’s 461 employees (as of February 22, 2011) operate under the direction of 18 senior executives, who have been affiliated with the Company and the Predecessor for 19.1 years, on average. The Company and the Predecessor have developed and managed commercial real estate for the past 38 years. The Company maintains an in-house leasing and property management staff which enables the Company to better understand the characteristics of the local markets in which it operates, to respond quickly and directly to tenant needs and to better identify local real estate opportunities.

Segments and Markets

At December 31, 2010, the Company’s reportable segments were based on the Company’s method of internal reporting and are as follows:

Reportable Segments	Markets
Northeast	Southeastern PA; Lehigh/Central PA; New Jersey
Midwest	Minnesota; Milwaukee; Chicago
Mid-Atlantic	Maryland; Carolinas; Richmond; Virginia Beach
South	Jacksonville; Orlando; Boca Raton; Tampa; Texas; Arizona
Philadelphia/D.C.	Philadelphia; Northern Virginia/Washington, D.C.
United Kingdom	County of Kent; West Midlands

Business Objective and Strategies for Growth

The Company’s business objective is to maximize long-term profitability for its shareholders by being a recognized leader in commercial real estate through the ownership, management, development and acquisition of superior office and industrial properties. The Company intends to achieve this objective through offering office and industrial properties in multiple markets and operating as a leading landlord in the industry. The Company believes that this objective will provide the benefits of enhanced investment opportunities, economies of scale, risk diversification both in terms of geographic market and real estate product type, access to capital and the ability to attract and retain personnel. The Company also strives to be a leading provider of customer service, providing an exceptional and positive tenant experience. The Company seeks to be an industry leader in sustainable development and to operate an energy-efficient portfolio. In pursuing its business objective, the Company seeks to achieve a combination of internal and external growth, maintain a conservative balance sheet and pursue a strategy of financial flexibility.

Products

The Company strives to be a recognized quality provider of five products (industrial properties, including big box warehouse, multi-tenant industrial, and industrial-flex/R&D; and office properties, including single-story office and multi-story office). The Company’s strategy with respect to product and market selection is expected generally to favor metro-office, multi-tenant industrial and industrial-flex properties with strong demographic and economic fundamentals. However, consistent with the Company’s strategy and market opportunities, the Company may pursue office and industrial products other than those noted above.

Markets

The Company operates primarily in the Mid-Atlantic, Southeastern, Midwestern and Southwestern United States. Additionally, the Company owns certain assets in the United Kingdom. The Company’s goal is to operate in each of its markets with an appropriate product mix of office and industrial properties. In some markets it may offer only one of its product types. Generally, the Company seeks to have a presence in each market sufficient for the Company to be viewed as a significant participant in that market. The Company’s efforts emphasize business park development and asset aggregation. The Company gathers information from internal sources and independent third parties and analyzes this information to support its evaluation of markets and market conditions.

Organizational Plan

The Company seeks to maintain a management organization that facilitates efficient execution of the Company’s strategy. As part of this effort, the Company pursues a human resources plan designed to create and maintain a highly regarded real estate company through recruiting, training and retaining capable people. The structure is designed to support a local office entrepreneurial platform operating within a value-added corporate structure. The Company upgrades its information technology periodically to keep pace with advances in available technology.

Internal Growth Strategies

The Company seeks to maximize the profitability of its Properties by endeavoring to maintain high occupancy levels while obtaining competitive rental rates, controlling costs and focusing on customer service efforts.

5

Maintain High Occupancies

The Company believes that the quality and diversity of its tenant base and its strategy of operating in multiple markets is integral to achieving its goal of attaining high occupancy levels for its portfolio. The Company targets financially stable tenants in an effort to minimize uncertainty relating to the ability of the tenants to meet their lease obligations.

Cost Controls

The Company seeks to identify best practices to apply throughout the Company in order to enhance cost savings and other efficiencies. The Company also employs an annual capital improvement and preventative maintenance program designed to reduce the operating costs of the Properties in Operation and maintain the long-term value of the Properties in Operation.

Customer Service

The Company seeks to achieve high tenant retention through a comprehensive customer service program, which is designed to provide an exceptional and positive tenant experience. The customer service program establishes best practices and provides an appropriate customer feedback process. The Company believes that the program has been helpful in increasing tenant satisfaction.

Energy Efficiency Initiatives

The Company is committed to improving the energy efficiency of the existing buildings in its portfolio and has made a substantial effort to design environmentally friendly features in the buildings it develops. The Company is pursuing a strategic initiative focused on improving the energy efficiency of the Properties in Operation. In connection with this initiative the Company has: (1) conducted level one energy audits on 263 buildings; (2) benchmarked 160 buildings with the Energy Star Portfolio Manager; (3) achieved Energy Star Certification for 50 Properties in Operation; and (4) installed energy monitoring systems in 130 buildings. These steps are estimated to have saved substantial energy costs during 2010.

Additionally, the Company has been an active participant in the U.S. Green Building Council’s Leadership in Energy and Environmental Design (“LEED”) program. The LEED program, which was created to recognize environmental leadership in the building industry, establishes a national standard for developing high-performance, sustainable buildings. The Company has approximately seven million square feet of LEED projects completed in 41 buildings, including the 1.25 million square foot Comcast Center, located in Philadelphia, Pennsylvania. The Company believes that green building techniques can result in positive environmental results and significant economic returns to tenants in terms of savings in operating costs and improved employee performance. The Company’s employees include 13 LEED Accredited Professionals and 110 Green Advantage Certified Practitioners.

The Company’s efforts in this area are ongoing. The Company intends to continue to explore methods of enhancing the performance of the buildings in its existing portfolio.

External Growth Strategies

The Company seeks to enhance its long-term profitability through the development, acquisition and disposition of properties either directly or through joint ventures. The Company also considers acquisitions of real estate operating companies.

Due to the economic disruption of the recent past, current market conditions for the development, acquisition and disposition of properties, although showing signs of recovery, have not normalized. We will however be opportunistic in both our acquisition and disposition activity and anticipate taking advantage of opportunities as they arise.

6

Wholly Owned Properties

Development

The Company pursues attractive development opportunities, focusing primarily on high-quality industrial and office properties within its existing markets. When the Company’s marketing efforts identify opportunities, the Company will consider pursuing opportunities outside of the Company’s established markets. The Company and its Predecessor have developed over 63 million square feet of commercial real estate during the past 38 years. The Company’s development activities generally fall into two categories: build-to-suit projects and projects built for inventory (projects that are less than 75% leased prior to commencement of construction). The Company develops build-to-suit projects for existing and new tenants. The Company also builds properties for inventory where the Company has identified sufficient demand at market rental rates to justify such construction. Given current market conditions, new development for 2011 will generally be build-to-suit or substantially pre-leased developments. Speculative development will be more modest and will need to be supported by strong local market conditions.

During the year ended December 31, 2010, the Company completed one build-to-suit project and two inventory projects totaling 381,000 square feet and representing an aggregate Total Investment, as defined below, of $81.0 million. As of December 31, 2010, these completed development properties were 99.7% leased. The “Total Investment” for a Property is defined as the Property’s purchase price plus closing costs (in the case of acquisitions — if vacant) and management’s estimate, as determined at the time of acquisition, of the cost of necessary building improvements in the case of acquisitions, or land costs and land and building improvement costs in the case of development projects, and, where appropriate, other development costs and carrying costs.

As of December 31, 2010, the Company had no wholly owned properties under development. Subsequent to December 31, 2010, the Company started the development, on a speculative basis, of two industrial-flex buildings and it signed leases (one of which is subject to certain approvals) committing it to the development of two 100% leased office buildings. The industrial-flex buildings are expected to contain a total of 103,000 square feet of leasable space and represent an anticipated Total Investment of $15 million. The office buildings are expected to contain a total of 360,000 square feet of leasable space and represent an anticipated Total Investment of $130 million.

The Company believes that, because it is a fully integrated real estate firm, its base of commercially zoned land in existing industrial and office business parks provides a competitive advantage for future development activities. As of December 31, 2010, the Company owned 1,347 acres of land held for development, substantially all of which is zoned for commercial use. Substantially all of the land is located adjacent to or within existing industrial or business parks with site improvements, such as public sewers, water and utilities, available for service. The Company estimates that its land holdings would support, as and when developed, 13.5 million square feet of property. The Company’s investment in land held for development as of December 31, 2010 was $209.3 million.

Through a development agreement with Philadelphia Industrial Development Corporation, the Company has development rights for 55 acres of land located at the Navy Yard in Philadelphia. The Company estimates that these 55 acres would support, as and when developed, 1.0 million square feet of property.

Through a development agreement with Kent County Council, the Company develops commercial buildings at Kings Hill, a 650-acre mixed use development site in the County of Kent, England. The Company also is the project manager for the installation of infrastructure on the site and receives a portion of the proceeds from the sale of land parcels to home builders. The site has planning consent for 2.0 million square feet of commercial space and 2,885 homes, of which approximately 825,000 square feet of commercial space and 2,509 homes have been completed as of December 31, 2010.

Acquisitions/Dispositions

The Company seeks to acquire properties consistent with its business objectives and strategies. The Company executes its acquisition strategy by purchasing properties that management believes will create shareholder value over the long-term.

During the year ended December 31, 2010, the Company acquired five properties comprising 1.2 million square feet for a Total Investment of $48.6 million.

The Company disposes of properties and land held for development that no longer fit within the Company’s strategic plan, or with respect to which the Company believes it can optimize cash proceeds. During the year ended December 31, 2010, the Company sold 10 operating properties containing an aggregate of 678,000 square feet, and 17 acres of land, for aggregate proceeds of $32.0 million.

7

Joint Venture Properties

The Company, from time to time, considers joint venture opportunities with institutional investors or other real estate companies. Joint venture partnerships provide the Company with additional sources of capital to share investment risk and fund capital requirements. In some instances, joint venture partnerships provide the Company with additional local market or product type expertise.

As of December 31, 2010, the Company had investments in and advances to unconsolidated joint ventures totaling $171.9 million (see Note 4 to the Company’s Consolidated Financial Statements).

Development

During the year ended December 31, 2010, unconsolidated joint ventures in which the Company held an interest completed two inventory projects totaling 640,000 square feet and representing a Total Investment of $159.0 million. As of December 31, 2010, these completed development properties were 16.9% leased.

As of December 31, 2010, the Company had no joint venture properties under development.

As of December 31, 2010, unconsolidated joint ventures in which the Company held an interest owned 627 acres of land held for development, substantially all of which is zoned for commercial use. Substantially all of the land is located adjacent to or within existing industrial or business parks with site improvements, such as public sewers, water and utilities, available for service. The Company estimates that its joint venture land holdings would support, as and when developed, 6.3 million square feet of property.

Acquisitions/Dispositions

During the year ended December 31, 2010, none of the unconsolidated joint ventures in which the Company held an interest acquired or disposed of any properties.

ITEM 1A. RISK FACTORS

The Company’s results of operations and the ability to make distributions to our shareholders and service our indebtedness may be affected by the risk factors set forth below. (The Company refers to itself as “we,” “us” or “our” in the following risk factors.) This section contains some forward looking statements. You should refer to the explanation of the qualifications and limitations on forward-looking statements on page 26.

Risks Related to Our Business

The recent economic disruption continues to adversely affect our business and financial condition.

The Company’s business is subject to the risks in this section. Current economic conditions have increased the probability the Company will experience these risks. Declines and continuing weakness in the general economy have negatively impacted the Company’s normal business practices. Although some signs of economic recovery have been noted, the economy as it impacts our business has not returned to pre-recession levels.

We have historically relied on access to the credit markets in the conduct of our business. In particular, we currently utilize a $500 million credit facility, and additionally, we have, as of December 31, 2010, $2.0 billion of senior unsecured debt and $320.7 million of secured debt. Our credit facility expires in November 2013. Although we are not aware of any instances in which banks participating in the credit facility have been unable or unwilling to participate in draws under the facility, it is possible that the financial issues confronting the banking industry could lead to such an occurrence. If such a circumstance occurred it is possible that the Company could not access the full amount which is supposed to be available under the credit facility. Our secured and unsecured debt matures at various times between 2011 and 2020. Only a small portion of the principal of our debt is repaid prior to maturity. Therefore, we generally need to refinance our outstanding debt as it matures. In 2011, we have $246.5 million of senior unsecured debt and $6.2 million of secured debt maturing.

Uncertainty about the pricing of commercial real estate has reduced our ability to acquire real estate and to dispose of properties that are not consistent with our long term strategy.

Additionally, to the extent that credit continues to be less available than in the past and/or more costly than in the past, this state of affairs will likely have an adverse impact on the value of commercial real estate. Uncertainty in the markets about the pricing of real estate has also reduced our ability to rely on the sale of our real estate assets to fund our growth opportunities.

8

The dramatic and pervasive nature of the economic downturn has resulted in substantial job losses and financial stress to the businesses which form our tenant base. Although the Company endeavors to lease to credit-worthy tenants and has historically experienced relatively few defaults due to tenant bankruptcy, in this economic environment the Company may sustain substantially increased tenant defaults due to bankruptcy or otherwise. Such losses may be greater than expected and may result in a material diminution in the income generated by the Company’s portfolio. As described more fully in “Management’s Discussion and Analysis of Financial Conditions and Results of Operations” during the year ended December 31, 2009, the Company recognized non-cash impairment charges due to a decline in fair market value of certain of the Company’s assets. There can be no assurance that the Company will not be required at a later point in time to recognize additional impairments to the Company’s assets.

The ongoing weakness in the general economy has affected some of our existing tenants, and could have an adverse impact on our ability to collect rent or renew leases with these tenants, resulting in a negative effect on our cash flow from operations.

The ongoing weakness in the general economy has had an adverse effect on many companies in numerous industries. We have tenants in these and other industries which may be experiencing these adverse effects. Should any of our tenants experience a downturn in its business that weakens its financial condition, delays lease commencement, causes it to fail to make rental payments when due, become insolvent or declare bankruptcy, the result could be a termination of the tenant’s lease and material losses to us. Our cash flow from operations and our ability to make expected distributions to our shareholders and service our indebtedness could, in such a case, be adversely affected.

Unfavorable events affecting our existing tenants, or negative market conditions that may affect our existing tenants, could have an adverse impact on our ability to attract new tenants, relet space, collect rent or renew leases, and thus could have a negative effect on our cash flow from operations.

Our cash flow from operations depends on our ability to lease space to tenants on economically favorable terms. Therefore, we could be adversely affected by various facts and events over which we have limited control, such as:

• lack of demand for space in the areas where our Properties are located

• inability to retain existing tenants and attract new tenants

• oversupply of or reduced demand for space and changes in market rental rates

• defaults by our tenants or their failure to pay rent on a timely basis

• the need to periodically renovate and repair our space

• physical damage to our Properties

• economic or physical decline of the areas where our Properties are located

• potential risk of functional obsolescence of our Properties over time

If a tenant is unable to pay rent due to us, we may be forced to evict such tenants, or engage in other remedies, which may be expensive and time consuming and may adversely affect our net income, shareholders’ equity and cash distributions to shareholders.

At any time, any of our tenants may experience a downturn in its business that may weaken its financial condition. As a result, a tenant may delay lease commencement, fail to make rental payments when due, decline to extend a lease upon its expiration, become insolvent or declare bankruptcy. Any tenant bankruptcy or insolvency, leasing delay or failure to make rental payments when due could result in the termination of the tenant’s lease and material losses to our Company.

If our tenants do not renew their leases as they expire, we may not be able to rent the space. Furthermore, leases that are renewed, and some new leases for space that is relet, may have terms that are less economically favorable to us than current lease terms, or may require us to incur significant costs, such as for renovations, tenant improvements or lease transaction costs.

Any of these events could adversely affect our cash flow from operations and our ability to make expected distributions to our shareholders and service our indebtedness.

A significant portion of our costs, such as real estate taxes, insurance costs, and debt service payments, generally are not reduced when circumstances cause a decrease in cash flow from our Properties.

9

We may not be able to compete successfully with other entities that operate in our industry.

We experience a great deal of competition in attracting tenants for our Properties and in locating land to develop and properties to acquire.

In our effort to lease our Properties, we compete for tenants with a broad spectrum of other landlords in each of our markets. These competitors include, among others, publicly-held REITs, privately-held entities, individual property owners and tenants who wish to sublease their space. Some of these competitors may be able to offer prospective tenants more attractive financial or other terms than we are able to offer.

We may experience increased operating costs, which could adversely affect our operations.

Our Properties are subject to increases in operating expenses such as insurance, cleaning, electricity, heating, ventilation and air conditioning, general and administrative costs and other costs associated with security, landscaping, repairs and maintenance. While our current tenants generally are obligated to pay a significant portion of these costs, there is no assurance that these tenants will make such payments or agree to pay these costs upon renewal or that new tenants will agree to pay these costs. If operating expenses increase in our markets, we may not be able to increase rents or reimbursements in all of these markets so as to meet increased expenses without simultaneously decreasing occupancy rates. If this occurs, our ability to make distributions to shareholders and service our indebtedness could be adversely affected.

Our ability to achieve growth in operating income depends in part on our ability to develop properties, which may suffer under certain circumstances.

We intend to continue to develop properties when warranted by market conditions. Current market conditions for development, although showing signs of recovery, have not normalized and consequently we expect growth in operating income from development to be limited at least in the near term.

Additionally, our general construction and development activities include the risks that:

• construction and leasing of a property may not be completed on schedule, which could result in increased expenses and construction costs, and would result in reduced profitability

• construction costs may exceed our original estimates due to increases in interest rates and increased materials, labor or other costs, possibly making the property unprofitable because we may not be able to increase rents to compensate for the increase in construction costs

• some developments may fail to achieve expectations, possibly making them unprofitable

• we may be unable to obtain, or may face delays in obtaining, required zoning, land-use, building, occupancy, and other governmental permits and authorizations, which could result in increased costs and could require us to abandon our activities entirely with respect to a project

• we may abandon development opportunities after we begin to explore them and as a result, we may fail to recover costs already incurred. If we alter or discontinue our development efforts, past and future costs of the investment may need to be expensed rather than capitalized and we may determine the investment is impaired, resulting in a loss

• we may expend funds on and devote management’s time to projects that we do not complete

• occupancy rates and rents at newly completed properties may fluctuate depending on a number of factors, including market and economic conditions, and may result in lower than projected rental rates with the result that our investment is not profitable

We face risks associated with property acquisitions.

We acquire individual properties and portfolios of properties, in some cases through the acquisition of operating entities, and intend to continue to do so when circumstances warrant. Due to the economic disruption of the recent past, current market conditions for acquisitions are challenging and as a result we expect growth in operating income from acquisitions to be limited at least in the near term.

Additionally, our acquisition activities and their success are subject to the following risks:

• when we are able to locate a desirable property, competition from other real estate investors may significantly increase the purchase price

• acquired properties may fail to perform as expected

• the actual costs of repositioning or redeveloping acquired properties may be higher than our estimates

10

• acquired properties may be located in new markets where we face risks associated with an incomplete knowledge or understanding of the local market, a limited number of established business relationships in the area and a relative unfamiliarity with local governmental and permitting procedures

• we may be unable to quickly and efficiently integrate new acquisitions, particularly acquisitions of portfolios of properties and operating entities, into our existing operations, and as a result, our results of operations and financial condition could be adversely affected

We may acquire properties subject to liabilities and without any recourse, or with only limited recourse, with respect to unknown liabilities. As a result, if a liability were asserted against us based upon ownership of those properties, we might have to pay substantial sums to settle it, which could adversely affect our cash flow.

Many of our Properties are concentrated in our primary markets, and we therefore may suffer economic harm as a result of adverse conditions in those markets.

Our Properties are located principally in specific geographic areas. Due to the concentration of our Properties in these areas, performance is dependent on economic conditions in these areas. These areas have experienced periods of economic decline.

We may not be able to access financial markets to obtain capital on a timely basis, or on acceptable terms.

In addition to the capital market constraints previously noted, our ability to access the public debt and equity markets depends on a variety of factors, including:

• general economic conditions affecting these markets

• our own financial structure and performance

• the market’s opinion of REITs in general

• the market’s opinion of REITs that own properties similar to ours

We may suffer adverse effects as a result of the terms of and covenants relating to our indebtedness.

Required payments on our indebtedness generally are not reduced if the economic performance of our portfolio of Properties declines. If the economic performance of our Properties declines, net income, cash flow from operations and cash available for distribution to shareholders will be reduced. If payments on debt cannot be made, we could sustain a loss, or in the case of mortgages, suffer foreclosures by mortgagees or suffer judgments. Further, some obligations, including our $500 million credit facility and $2.0 billion in unsecured notes issued in past public offerings, contain cross-default and/or cross-acceleration provisions, as does $8.4 million in outstanding mortgage indebtedness at December 31, 2010, which means that a default on one obligation may constitute a default on other obligations.

Our credit facility and unsecured debt securities contain customary restrictions, requirements and other limitations on our ability to incur indebtedness, including total debt to asset ratios, secured debt to total asset ratios, debt service coverage ratios and minimum ratios of unencumbered assets to unsecured debt which we must maintain. Our continued ability to borrow under our $500 million credit facility is subject to compliance with our financial and other covenants. In addition, our failure to comply with such covenants could cause a default under this credit facility, and we may then be required to repay such debt with capital from other sources. Under those circumstances, other sources of capital may not be available to us, or be available only on unattractive terms.

Our degree of leverage could limit our ability to obtain additional financing.

Our degree of leverage could affect our ability to obtain additional financing for working capital, capital expenditures, acquisitions, development or other general corporate purposes. Our senior unsecured debt is currently rated investment grade by the three major rating agencies. However, there can be no assurance we will be able to maintain this rating, and in the event our senior debt is downgraded from its current rating, we would likely incur higher borrowing costs. Our degree of leverage could also make us more vulnerable to a downturn in business or the economy generally.

Further issuances of equity securities may be dilutive to our existing shareholders.

The interests of our existing shareholders could be diluted if we issue additional equity securities to finance future developments, acquisitions, or repay indebtedness. Our Board of Trustees can authorize the issuance of additional securities without shareholder approval. Our ability to execute our business strategy depends on our access to an appropriate blend of debt financing, including unsecured lines of credit and other forms of secured and unsecured debt, and equity financing, including issuances of common and preferred equity.

11

An increase in interest rates would increase our interest costs on variable rate debt and could adversely impact our ability to refinance existing debt.

We currently have, and may incur more, indebtedness that bears interest at variable rates. Accordingly, if interest rates increase, so will our interest costs, which would adversely affect our cash flow and our ability to pay principal and interest on our debt and our ability to make distributions to our shareholders. Further, rising interest rates could limit our ability to refinance existing debt when it matures.

Property ownership through joint ventures will limit our ability to act exclusively in our interests and may require us to depend on the financial performance of our co-venturers.

From time to time we invest in joint ventures in which we do not hold a controlling interest. These investments involve risks that do not exist with properties in which we own a controlling interest, including the possibility that our partners may, at any time, have business, economic or other objectives that are inconsistent with our objectives. In instances where we lack a controlling interest, our partners may be in a position to require action that is contrary to our objectives. While we seek to negotiate the terms of these joint ventures in a way that secures our ability to act in our best interests, there can be no assurance that those terms will be sufficient to fully protect us against actions contrary to our interests. If the objectives of our co-ventures are inconsistent with ours, we may not in every case be able to act exclusively in our interests.

Additionally, our joint venture partners may experience financial difficulties or change their investment philosophies. This may impair their ability to meet their obligations to the joint venture, such as with respect to providing additional capital, if required. If such a circumstance presented itself we may be required to perform on their behalf, if possible, or suffer a loss of all or a portion of our investment in the joint venture.

Risks Related to the Real Estate Industry

Real estate investments are illiquid, and we may not be able to sell our Properties if and when we determine it is appropriate to do so.

Real estate generally cannot be sold quickly. We may not be able to dispose of our Properties promptly in response to economic or other conditions. In addition, provisions of the Internal Revenue Code of 1986, as amended (the “Code”), limit a REIT’s ability to sell properties in some situations when it may be economically advantageous to do so, thereby adversely affecting returns to shareholders and adversely impacting our ability to meet our obligations to the holders of other securities.

We may experience economic harm if any damage to our Properties is not covered by insurance.

We believe all of our Properties are adequately insured with carriers that are adequately capitalized. However, we cannot guarantee that the limits of our current policies will be sufficient in the event of a catastrophe to our Properties or that carriers will be able to honor their obligations. Our existing property and liability policies expire during 2011. We cannot guarantee that we will be able to renew or duplicate our current coverages in adequate amounts or at reasonable prices.

We may suffer losses that are not covered under our comprehensive liability, fire, extended coverage and rental loss insurance policies. For example, we may not be insured for losses resulting from acts of war, certain acts of terrorism, or from environmental liabilities. If an uninsured loss or a loss in excess of insured limits should occur, we would nevertheless remain liable for the loss which could adversely affect cash flow from operations.

Potential liability for environmental contamination could result in substantial costs.

Under federal, state and local environmental laws, ordinances and regulations, we may be required to investigate and clean up the effects of releases of hazardous or toxic substances or petroleum products at our Properties simply because of our current or past ownership or operation of the real estate. If unidentified environmental problems arise, we may have to make substantial payments which could adversely affect our cash flow and our ability to make distributions to our shareholders because:

• as owner or operator, we may have to pay for property damage and for investigation and clean-up costs incurred in connection with the contamination

• the law typically imposes clean-up responsibility and liability regardless of whether the owner or operator knew of or caused the contamination

• even if more than one person may be responsible for the contamination, each person who _____shares legal liability under the environmental laws may be held responsible for all of the clean-up costs

• governmental entities and third parties may sue the owner or operator of a contaminated site for damages and costs

12

These costs could be substantial. The presence of hazardous or toxic substances or petroleum products or the failure to properly remediate contamination may materially and adversely affect our ability to borrow against, sell or rent an affected property. In addition, applicable environmental laws create liens on contaminated sites in favor of the government for damages and costs it incurs in connection with a contamination. Changes in laws increasing the potential liability for environmental conditions existing at our Properties may result in significant unanticipated expenditures.

It is our policy to retain independent environmental consultants to conduct Phase I environmental site assessments and asbestos surveys with respect to our acquisition of properties. These assessments generally include a visual inspection of the properties and the surrounding areas, an examination of current and historical uses of the properties and the surrounding areas and a review of relevant state, federal and historical documents, but do not involve invasive techniques such as soil and ground water sampling. Where appropriate, on a property-by-property basis, our practice is to have these consultants conduct additional testing, including sampling for asbestos, for lead in drinking water, for soil contamination where underground storage tanks are or were located or where other past site usages create a potential environmental problem, and for contamination in groundwater. Even though these environmental assessments are conducted, there is still the risk that:

• the environmental assessments and updates will not identify all potential environmental liabilities

• a prior owner created a material environmental condition that is not known to us or the independent consultants preparing the assessments

• new environmental liabilities have developed since the environmental assessments were conducted

• future uses or conditions such as changes in applicable environmental laws and regulations could result in environmental liability for us

While we test indoor air quality on a regular basis and have an ongoing maintenance program in place to address this aspect of property operations, inquiries about indoor air quality may necessitate special investigation and, depending on the results, remediation. Indoor air quality issues can stem from inadequate ventilation, chemical contaminants from indoor or outdoor sources, pollen, viruses and bacteria. Indoor exposure to chemical or biological contaminants above certain levels can be alleged to be connected to allergic reactions or other health effects and symptoms in susceptible individuals. If these conditions were to occur at one of our Properties, we may need to undertake a targeted remediation program, including without limitation, steps to increase indoor ventilation rates and eliminate sources of contaminants. Such remediation programs could be costly, necessitate the temporary relocation of some or all of the Property’s tenants or require rehabilitation of the affected Property.

Our Properties may contain or develop harmful mold, which could lead to liability for adverse health effects and costs of remediating the problem.

When excessive moisture accumulates in buildings or on building materials, mold growth may occur, particularly if the moisture problem remains undiscovered or is not addressed over a period of time. Some molds may produce airborne toxins or irritants. Concern about indoor exposure to mold has been increasing as exposure to mold may cause a variety of adverse health effects and symptoms, including allergic or other reactions. As a result, the presence of significant mold at any of our Properties could require us to undertake a costly remediation program to contain or remove the mold from the affected Property. In addition, the presence of significant mold could expose us to liability from our tenants, employees of our tenants and others if property damage or health concerns arise.

Compliance with the Americans with Disabilities Act and fire, safety and other regulations may require us to make expenditures that adversely impact our operating results.

All of our Properties are required to comply with the Americans with Disabilities Act (“ADA”). The ADA generally requires that buildings be made accessible to people with disabilities. Compliance with the ADA requirements could require removal of access barriers, and non-compliance could result in imposition of fines by the United States government or an award of damages to private litigants, or both. Expenditures related to complying with the provisions of the ADA could adversely affect our results of operations and financial condition and our ability to make distributions to shareholders. In addition, we are required to operate our Properties in compliance with fire and safety regulations, building codes and other land use regulations, as they may be adopted by governmental agencies and bodies and become applicable to our Properties. We may be required to make substantial capital expenditures to comply with those requirements and these expenditures could have a material adverse effect on our operating results and financial condition, as well as our ability to make distributions to shareholders.

13

Terrorist attacks and other acts of violence or war may adversely impact our operating results and may affect markets on which our securities are traded.

Terrorist attacks against our Properties, or against the United States or United States interests generally, may negatively affect our operations and investments in our securities. Attacks or armed conflicts could have a direct adverse impact on our Properties or operations through damage, destruction, loss or increased security costs. Any terrorism insurance that we obtain may be insufficient to cover the loss for damages to our Properties as a result of terrorist attacks.

Furthermore, any terrorist attacks or armed conflicts could result in increased volatility in or damage to the United States and worldwide financial markets and economy. Adverse economic conditions could affect the ability of our tenants to pay rent, which could have an adverse impact on our operating results.

Risks Related to Our Organization and Structure

We have elected REIT status under the federal tax laws and could suffer adverse consequences if we fail to qualify as a REIT.

We have elected REIT status under federal tax laws and have taken the steps known to us to perfect that status, but we cannot be certain that we qualify or that we will remain qualified. Qualification as a REIT involves the application of highly technical and complex provisions of the Code, as to which there are only limited judicial or administrative interpretations. The complexity of these provisions and of the related income tax regulations is greater in the case of a REIT that holds its assets in partnership form, as we do. Moreover, no assurance can be given that new tax laws will not significantly affect our qualification as a REIT or the federal income tax consequences of such qualification. New laws could be applied retroactively, which means that past operations could be found to be in violation, which would have a negative effect on the business.

If we fail to qualify as a REIT in any taxable year, the distributions to shareholders would not be deductible when computing taxable income. If this happened, we would be subject to federal income tax on our taxable income at regular corporate rates. Also, we could be prevented from qualifying as a REIT for the four years following the year in which we were disqualified. Further, if we requalified as a REIT after failing to qualify, we might have to pay the full corporate-level tax on any unrealized gain in our assets during the period we were not qualified as a REIT. We would then have to distribute to our shareholders the earnings we accumulated while we were not qualified as a REIT. These additional taxes would reduce our funds available for distribution to our shareholders. In addition, while we were disqualified as a REIT, we would not be required by the Code to make distributions to our shareholders. A failure by the Company to qualify as a REIT and the resulting requirement to pay taxes and interest (and perhaps penalties) would cause us to default under various agreements to which we are a party, including under our credit facility, and would have a material adverse effect on our business, prospects, results of operations, earnings, financial condition and our ability to make distributions to shareholders.

Future economic, market, legal, tax or other considerations may lead our Board of Trustees to authorize the revocation of our election to qualify as a REIT. A revocation of our REIT status would require the consent of the holders of a majority of the voting interests of all of our outstanding Common Shares.

Risks associated with potential borrowings necessary to make distributions to qualify as a REIT; distributions can be made in Common Shares.

We intend to make distributions to shareholders to comply with the distribution provisions of the Code necessary to maintain qualification as a REIT and to avoid income taxes and the non-deductible excise tax. Under certain circumstances, we may be required to borrow funds to meet the distribution requirements necessary to achieve the tax benefits associated with qualifying as a REIT. In such circumstances, we might need to borrow funds to avoid adverse tax consequences, even if our management believes that the prevailing market conditions are not generally favorable for such borrowings or that such borrowings would not be advisable in the absence of such tax considerations.

For distributions with respect to a taxable year ending on or before December 31, 2011, Company stock may be used to meet these distribution requirements, subject to the requirements of Internal Revenue Service Revenue Procedure 2010-12, 2010-3 IRB. Under this Revenue Procedure, we are permitted to make taxable distributions of our stock (in lieu of cash) if (x) any such distribution is declared with respect to a taxable year ending on or before December 31, 2011, and (y) each of our stockholders is permitted to elect to receive its entire entitlement under such declaration in either cash or shares of equivalent value subject to a limitation in the amount of cash to be distributed in the aggregate; provided that (i) the amount of cash that we set aside for distribution is not less than 10% of aggregate distribution so declared, and (ii) if too many of our stockholders elect to receive cash, a pro rata amount of cash will be distributed to each such stockholder electing to receive cash, but in no event will any such stockholder receive less than its entire entitlement under such declaration. Thus, if we were to elect to make distributions using our Common Shares, our shareholders may receive less cash than they might have preferred.

14

Certain officers of the Trust may not have the same interests as shareholders as to certain tax laws.

Certain officers of the Trust own Common Units. These units may be exchanged for our Common Shares. The officers who own those units and have not yet exchanged them for our Common Shares may suffer different and more adverse tax consequences than holders of our Common Shares suffer in certain situations:

• when certain of our Properties are sold

• when debt on those Properties is refinanced

• if we are involved in a tender offer or merger

Because these officers own units and face different consequences than shareholders do, the Trust and those officers may have different objectives as to these transactions than shareholders do.

Certain aspects of our organization could have the effect of restricting or preventing a change of control of our Company, which could have an adverse effect on the price of our shares.

Our charter contains an ownership limit on shares. To qualify as a REIT, five or fewer individuals cannot own, directly or indirectly, more than 50% in value of the outstanding shares of beneficial interest. To this end, our Declaration of Trust, among other things, generally prohibits any holder of the Trust’s shares from owning more than 5% of the Trust’s outstanding shares of beneficial interest, unless that holder gets the consent from our Board of Trustees. This limitation could prevent the acquisition of control of the Company by a third party without the consent from our Board of Trustees.

We can issue preferred shares. Our Declaration of Trust authorizes our Board of Trustees to establish the preferences and rights of any shares issued. The issuance of preferred shares could have the effect of delaying, making more difficult or preventing a change of control of the Company, even if a change in control were in the shareholder’s interest.

There are limitations on acquisition of and changes in control pursuant to, and fiduciary protections of The Board under Maryland law. The Maryland General Corporation Law (“MGCL”) contains provisions which are applicable to the Trust as if the Trust were a corporation. Among these provisions is a section, referred to as the “control share acquisition statute,” which eliminates the voting rights of shares acquired in quantities so as to constitute “control shares,” as defined under the MGCL. The MGCL also contains provisions applicable to us that are referred to as the “business combination statute,” which would generally limit business combinations between the Company and any 10% owners of the Trust’s shares or any affiliate thereof. Further, Maryland law provides broad discretion to the Board with respect to its fiduciary duties in considering a change in control of our Company, including that the Board is subject to no greater level of scrutiny in considering a change in control transaction than with respect to any other act by the Board. Finally, the “unsolicited takeovers” provisions of the MGCL permit the Board, without shareholder approval and regardless of what is currently provided in our Declaration of Trust or By-Laws, to implement takeover defenses that our Company does not yet have, including permitting only the Board to fix the size of the Board and permitting only the Board to fill a vacancy on the Board. All of these provisions may have the effect of inhibiting a third party from making an acquisition proposal for our Company or of delaying, deferring or preventing a change in control of the Company under circumstances that otherwise could provide the holders of Common Shares with the opportunity to realize a premium over the then current market price.

Various factors out of our control could hurt the market value of our publicly traded securities.

The value of our publicly traded securities depends on various market conditions, which may change from time to time. In addition to general economic and market conditions and our particular financial condition and performance, the value of our publicly traded securities could be affected by, among other things, the extent of institutional investor interest in us and the market’s opinion of REITs in general and, in particular, REITs that own and operate properties similar to ours.

The market value of the equity securities of a REIT may be based primarily upon the market’s perception of the REIT’s growth potential and its current and future cash distributions, and may be secondarily based upon factors such as the real estate market value of the underlying assets. The failure to meet the market’s expectations with regard to future earnings and cash distributions likely would adversely affect the market price of publicly traded securities. Our payment of future dividends will be at the discretion of our Board of Trustees and will depend on numerous factors including our cash flow, financial condition and capital requirements, annual distribution requirements under the REIT provisions of the Code, the general economic environment and such other factors as our Board of Trustees deems relevant, and we cannot assure you that our annual dividend rate will be maintained at its current level. We are currently distributing more in dividends than we receive in net cash provided by operating activities less customary tenant improvement and leasing transaction costs. Over time, increases in occupancy and rental rates could offset this shortfall. Should market opportunities allow us to accelerate our strategy relating to dispositions (i.e. sale of suburban office) without corresponding opportunities to reinvest those proceeds in the near term, this shortfall would increase. We will continually evaluate these circumstances opposite our distribution policies.

15

Rising market interest rates could make an investment in publicly traded securities less attractive. If market interest rates increase, purchasers of publicly traded securities may demand a higher annual yield on the price they pay for their securities. This could adversely affect the market price of publicly traded securities.

We no longer have a shareholder rights plan but are not precluded from adopting one.

Our shareholder rights plan expired in accordance with its terms on December 31, 2007. While we did not extend or renew the plan, we are not prohibited from adopting, without shareholder approval, a shareholder rights plan that may discourage any potential acquirer from acquiring more than a specific percentage of our outstanding Common Shares since, upon this type of acquisition without approval of our Board of Trustees, all other common shareholders would have the right to purchase a specified amount of Common Shares at a substantial discount from market price.

Transactions by the Trust or the Operating Partnership could adversely affect debt holders.

Except with respect to several covenants limiting the incurrence of indebtedness and a covenant requiring the Operating Partnership to maintain a certain unencumbered total asset value, our indentures do not contain any additional provisions that would protect holders of the Operating Partnership’s debt securities in the event of (i) a highly leveraged transaction involving the Operating Partnership, (ii) a change of control or (iii) certain reorganizations, restructurings, mergers or similar transactions involving the Operating Partnership or the Trust.

ITEM 1B. UNRESOLVED STAFF COMMENTS

None.

ITEM 2. PROPERTIES

The Wholly Owned Properties in Operation, as of December 31, 2010, consisted of 345 industrial and 292 office properties. Single tenants occupy 186 Wholly Owned Properties in Operation. These tenants generally require a reduced level of service in connection with the operation or maintenance of these properties. The remaining 451 Wholly Owned Properties in Operation are multi-tenant properties for which the Company renders a range of building, operating and maintenance services.

As of December 31, 2010, the industrial Wholly Owned Properties in Operation were 89.9% leased. The average building size for the industrial Wholly Owned Properties in Operation was approximately 126,000 square feet. As of December 31, 2010, the office Wholly Owned Properties in Operation were 90.1% leased. The average building size for the office Wholly Owned Properties in Operation was approximately 75,000 square feet.

The JV Properties in Operation, as of December 31, 2010, consisted of 48 industrial and 50 office properties. Single tenants occupy 37 JV Properties in Operation. These tenants generally require a reduced level of service in connection with the operation or maintenance of these properties. The remaining 61 JV Properties in Operation are multi-tenant properties for which the Company renders a range of building, operating and maintenance services.

As of December 31, 2010, the industrial JV Properties in Operation were 79.9% leased. The average building size for the industrial JV Properties in Operation was approximately 202,000 square feet. As of December 31, 2010, the office JV Properties in Operation were 89.2% leased. The average building size for the office JV Properties in Operation was approximately 95,000 square feet.

16

A complete listing of the Wholly Owned Properties in Operation appears as Schedule III to the financial statements of the Company included in this Annual Report on Form 10-K. The table below sets forth certain information on the Company’s Properties in Operation as of December 31, 2010 (in thousands, except percentages).

	Type		Net Rent(1)		Square Feet		% Leased
Northeast	Industrial	-Distribution	$	67,562		15,712		94.5	%
		-Flex		30,808		3,650		88.4	%
	Office			115,258		8,676		89.9	%
	Total			213,628		28,038		92.3	%
Midwest	Industrial	-Distribution		5,189		1,155		100.0	%
		-Flex		14,158		2,236		75.9	%
	Office			28,595		2,585		91.6	%
	Total			47,942		5,976		87.4	%
Mid-Atlantic	Industrial	-Distribution		30,031		8,577		86.2	%
		-Flex		9,654		1,315		83.6	%
	Office			50,772		4,457		86.1	%
	Total			90,457		14,349		85.9	%
South	Industrial	-Distribution		26,347		6,518		87.8	%
		-Flex		29,806		3,779		89.9	%
	Office			69,492		5,172		91.6	%
	Total			125,645		15,469		89.6	%
Philadelphia/D.C.	Industrial	-Distribution		3,500		346		100.0	%
		-Flex		1,816		101		100.0	%
	Office			13,803		828		99.6	%
	Total			19,119		1,275		99.7	%
United Kingdom	Industrial	-Distribution		—		—		—
		-Flex		1,228		44		100.0	%
	Office			2,641		90		94.0	%
	Total			3,869		134		96.0	%
TOTAL	Industrial	-Distribution		132,629		32,308		91.2	%
		-Flex		87,470		11,125		86.0	%
	Office			280,561		21,808		90.1	%
	Total		$	500,660		65,241		89.9	%
Joint Ventures (2)	Industrial	-Distribution	$	30,064		9,505		79.9	%
		-Flex		3,783		171		82.0	%
	Office			100,185		4,746		89.2	%
	Total		$	134,032		14,422		83.0	%

(1)

Net rent represents the contractual rent per square foot multiplied by the tenant’s square feet leased at December 31, 2010 for tenants in occupancy. Average annual rent per square foot for the Wholly Owned Properties in Operation is $8.53 and for the Joint Venture Properties in Operation it is $11.20. Net rent does not include the tenant’s obligation to pay property operating expenses and real estate taxes.

(2)

Joint Ventures represent the 98 properties owned by unconsolidated joint ventures in which the Company has an interest.

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The expiring square feet and annual rent by year for the Properties in Operation as of December 31, 2010 are as follows (in thousands except number of tenants and % of annual rent):

	Industrial-Distribution									Industrial-Flex									Office									Total
	Number						% of			Number						% of			Number						% of			Number						% of
	of		Square				Annual			of		Square				Annual			of		Square				Annual			of		Square				Annual
	Tenants		Feet		Annual Rent		Rent			Tenants		Feet		Annual Rent		Rent			Tenants		Feet		Annual Rent		Rent			Tenants		Feet		Annual Rent		Rent
Wholly Owned Properties in Operation:
2011		52		2,107	$	9,161		6.1	%		125		1,101	$	9,181		9.5	%		276		1,704	$	21,287		6.6	%		453		4,912	$	39,629		7.0	%
2012		54		3,923		17,279		11.5	%		139		1,720		15,875		16.4	%		271		2,542		41,415		12.9	%		464		8,185		74,569		13.1	%
2013		44		3,907		17,479		11.6	%		105		1,601		15,330		15.8	%		219		2,005		32,813		10.2	%		368		7,513		65,622		11.5	%
2014		33		2,849		14,204		9.5	%		72		1,014		10,203		10.5	%		168		3,132		47,684		14.8	%		273		6,995		72,091		12.7	%
2015		32		4,812		21,204		14.1	%		74		1,119		11,381		11.7	%		165		2,816		40,311		12.5	%		271		8,747		72,896		12.8	%
2016		22		2,730		13,032		8.7	%		39		917		9,673		10.0	%		84		1,907		32,912		10.2	%		145		5,554		55,617		9.8	%
2017		20		2,359		12,086		8.0	%		31		868		9,526		9.8	%		37		804		13,167		4.1	%		88		4,031		34,779		6.1	%
2018		17		1,883		11,595		7.7	%		15		410		3,807		3.9	%		30		1,009		18,929		5.9	%		62		3,302		34,331		6.0	%
2019		11		1,348		7,867		5.2	%		4		247		3,248		3.3	%		28		1,699		33,285		10.4	%		43		3,294		44,400		7.8	%
2020		13		2,618		15,595		10.4	%		9		338		4,623		4.7	%		29		1,104		20,976		6.5	%		51		4,060		41,194		7.2	%
Thereafter		7		932		10,822		7.2	%		9		230		4,247		4.4	%		27		927		19,066		5.9	%		43		2,089		34,135		6.0	%
Total		305		29,468	$	150,324		100.0	%		622		9,565	$	97,094		100.0	%		1,334		19,649	$	321,845		100.0	%		2,261		58,682	$	569,263		100.0	%
Joint Venture Properties in Operation:
2011		10		788	$	2,565		7.5	%		1		11	$	294		7.8	%		59		462	$	11,968		9.7	%		70		1,261	$	14,827		9.2	%
2012		9		494		1,845		5.4	%		5		68		1,792		47.4	%		17		218		5,206		4.2	%		31		780		8,843		5.5	%
2013		7		936		3,616		10.5	%		—		—		—		0.0	%		16		197		4,465		3.6	%		23		1,133		8,081		5.0	%
2014		8		1,190		5,489		15.9	%		2		25		703		18.6	%		23		415		10,600		8.6	%		33		1,630		16,792		10.4	%
2015		5		741		3,326		9.7	%		—		—		—		0.0	%		24		249		5,661		4.6	%		29		990		8,987		5.6	%
2016		7		553		3,114		9.0	%		1		36		995		26.2	%		21		531		13,294		10.8	%		29		1,120		17,403		10.7	%
2017		8		1,247		5,547		16.1	%		—		—		—		0.0	%		6		206		4,959		4.0	%		14		1,453		10,506		6.5	%
2018		5		726		3,964		11.5	%		—		—		—		0.0	%		14		66		2,129		1.7	%		19		792		6,093		3.8	%
2019		1		500		2,948		8.6	%		—		—		—		0.0	%		16		218		6,453		5.2	%		17		718		9,401		5.8	%
2020		—		—		—		0.0	%		—		—		—		0.0	%		5		100		1,589		1.3	%		5		100		1,589		1.0	%
Thereafter		3		420		2,003		5.8	%		—		—		—		0.0	%		21		1,571		57,214		46.3	%		24		1,991		59,217		36.5	%
Total		63		7,595	$	34,417		100.0	%		9		140	$	3,784		100.0	%		222		4,233	$	123,538		100.0	%		294		11,968	$	161,739		100.0	%

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The table below highlights, for the Properties in Operation, the Company’s top ten office tenants and top ten industrial tenants as of December 31, 2010. The table reflects, for the tenants in the JV Properties in Operation, the Company’s ownership percentage of the respective joint venture.

	Percentage
Top 10 Office Tenants	of Net Rent
The Vanguard Group, Inc.		3.8	%
GlaxoSmithKline		2.0	%
United States of America		1.5	%
General Motors Acceptance Corporation		1.4	%
Comcast Corporation		1.3	%
United Healthcare Services, Inc.		1.1	%
Fidelity National Information Services		1.1	%
PNC Bank, National Association		1.0	%
WellCare Health Plans, Inc		1.0	%
Hartford Fire Insurance Company		1.0	%
		15.2	%

	Percentage
Top 10 Industrial Tenants	of Net Rent
Kellogg USA, Inc.		1.3	%
Amazon.com		1.1	%
Home Depot U.S.A., Inc.		1.1	%
Wakefern Food Corp.		1.0	%
Tasty Baking Company		0.8	%
Ozburn Hessey Logistics, L.L.C.		0.7	%
Federal Express Corporation		0.7	%
The Dial Corporation		0.6	%
Uline, Inc.		0.5	%
Broder Bros., Inc.		0.5	%
		8.3	%

ITEM 3. LEGAL PROCEEDINGS

As noted in previous filings, as a result of the Company’s acquisition of Republic Property Trust in October, 2007 the Company was substituted as a party to certain ongoing litigation (the “Republic Litigation”). The Republic Litigation has been settled, and the settlement has not had, and will not have, a material impact on the Company’s financial position and results of operations for any period. The Company is not a party to any material litigation as of December 31, 2010.

ITEM 4. [REMOVED AND RESERVED]

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PART II

ITEM 5. MARKET FOR THE REGISTRANTS’ COMMON EQUITY, RELATED SHAREHOLDER MATTERS AND RELATED ISSUER PURCHASES OF EQUITY SECURITIES

The Common Shares are traded on the New York Stock Exchange under the symbol “LRY.” There is no established public trading market for the Common Units. The following table sets forth, for the calendar quarters indicated, the high and low closing prices of the Common Shares on the New York Stock Exchange, and the dividends declared per Common Share for such calendar quarter.

					Dividends
					Declared Per
	High		Low		Common Share
2010
Fourth Quarter	$	34.82	$	29.84	$	0.475
Third Quarter		33.16		27.41		0.475
Second Quarter		35.05		28.85		0.475
First Quarter		34.96		28.75		0.475
2009
Fourth Quarter	$	33.05	$	28.36	$	0.475
Third Quarter		35.11		21.23		0.475
Second Quarter		25.61		18.93		0.475
First Quarter		23.32		16.90		0.475

As of February 22, 2011, the Common Shares were held by 1,067 holders of record. Since its initial public offering in 1994, the Company has paid regular and uninterrupted quarterly dividends.

Although the Company currently anticipates that dividends at $0.475 per Common Share per quarter or a comparable rate will continue to be paid in the future, the payment of future dividends by the Company will be at the discretion of the Board of Trustees and will depend on numerous factors including the Company’s cash flow, its financial condition, capital requirements, annual distribution requirements under the REIT provisions of the Code, the general economic environment and such other factors as the Board of Trustees deems relevant.

In December 2010, an individual acquired 14,000 Common Shares in exchange for the same number of Common Units. This individual acquired these Common Units in connection with his contribution to the Operating Partnership of certain assets. The exchange of Common Shares for the Common Units is exempt from the registration requirement of the Securities Act of 1933, as amended, pursuant to Section 4(2) thereunder.

20

The following line graph compares the cumulative total shareholder return on Common Shares for the period beginning December 31, 2005 and ended December 31, 2010 with the cumulative total return on the Standard and Poor’s 500 Stock Index (“S&P 500”) and the NAREIT Equity REIT Total Return Index (“NAREIT Index”) over the same period. Total return values for the S&P 500, the NAREIT Index and the Company’s Common Shares were calculated based on cumulative total return assuming the investment of $100 in the NAREIT Index, the S&P 500 and the Company’s Common Shares on December 31, 2005, and assuming reinvestment of dividends in all cases.

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ITEM 6. SELECTED FINANCIAL DATA

The following tables set forth Selected Financial Data for the Trust and the Operating Partnership as of and for the years ended December 31, 2010, 2009, 2008, 2007 and 2006. The information set forth below should be read in conjunction with “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and the financial statements and notes thereto appearing elsewhere in this report. Certain amounts from prior years have been reclassified to conform to current-year presentation.

Liberty Property Trust

Operating Data	Year Ended December 31,
(In thousands, except per share data)	2010		2009		2008		2007		2006
Total operating revenue	$	746,830	$	739,379	$	725,451	$	662,832	$	583,707
Income from continuing operations	$	145,662	$	53,183	$	147,788	$	138,913	$	151,016
Net income	$	153,375	$	78,992	$	180,106	$	190,310	$	292,043
Basic:
Income from continuing operations	$	1.06	$	0.29	$	1.29	$	1.27	$	1.47
Income from discontinued operations	$	0.07	$	0.23	$	0.33	$	0.54	$	1.51
Income per common share	$	1.13	$	0.52	$	1.62	$	1.81	$	2.98
Diluted:
Income from continuing operations	$	1.05	$	0.29	$	1.29	$	1.26	$	1.46
Income from discontinued operations	$	0.07	$	0.23	$	0.33	$	0.54	$	1.49
Income per common share	$	1.12	$	0.52	$	1.62	$	1.80	$	2.95
Distributions paid per common share	$	1.900	$	1.900	$	2.500	$	2.485	$	2.465
Weighted average number of shares outstanding — basic (1)		112,924		107,550		93,615		91,197		89,361
Weighted average number of shares outstanding — diluted (2)		113,606		108,002		93,804		91,803		90,492

Balance Sheet Data	December 31,
(In thousands)	2010		2009		2008		2007		2006
Net real estate	$	4,404,027	$	4,446,650	$	4,479,697	$	4,839,482	$	4,252,459
Total assets		5,062,833		5,228,943		5,217,035		5,643,937		4,910,911
Total indebtedness		2,359,822		2,456,875		2,590,167		3,021,129		2,387,938
Liberty Property Trust shareholders’ equity		2,082,186		2,122,295		1,958,779		1,837,025		1,870,855

Other Data		Year Ended December 31,
(Dollars in thousands)	2010			2009			2008			2007			2006
Net cash provided by operating activities	$	298,957		$	302,861		$	261,985		$	346,752		$	324,573
Net cash (used in) provided by investing activities		(110,154	)		(9,992	)		56,517			(758,924	)		(334,942	)
Net cash (used in) provided by financing activities		(315,842	)		(74,033	)		(331,314	)		396,322			(327	)
Funds from operations available to common shareholders (3)		311,181			222,106			313,910			305,216			294,801
Total leaseable square footage of Wholly Owned Properties in Operation at end of period (in thousands)		65,241			64,384			63,799			62,079			59,160
Total leasable square footage of JV Properties in Operation at end of period (in thousands)		14,422			13,786			13,069			11,462			6,172
Wholly Owned Properties in Operation at end of period		637			639			654			649			672
JV Properties in Operation at end of period		98			96			95			91			48
Wholly Owned Properties in Operation percentage leased at end of period		90	%		89	%		91	%		93	%		94	%
JV Properties in Operation percentage leased at end of period		83	%		88	%		92	%		94	%		95	%

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Liberty Property Limited Partnership

Operating Data	Year Ended December 31,
(In thousands, except per share data)	2010		2009		2008		2007		2006
Total operating revenue	$	746,830	$	739,379	$	725,451	$	662,832	$	583,707
Income from continuing operations	$	145,662	$	53,183	$	147,788	$	138,913	$	151,016
Net income	$	153,375	$	78,992	$	180,106	$	190,310	$	292,043
Basic:
Income from continuing operations	$	1.06	$	0.29	$	1.29	$	1.27	$	1.47
Income from discontinued operations	$	0.07	$	0.23	$	0.33	$	0.54	$	1.51
Income per common unit	$	1.13	$	0.52	$	1.62	$	1.81	$	2.98
Diluted:
Income from continuing operations	$	1.05	$	0.29	$	1.29	$	1.26	$	1.46
Income from discontinued operations	$	0.07	$	0.23	$	0.33	$	0.54	$	1.49
Income per common unit	$	1.12	$	0.52	$	1.62	$	1.80	$	2.95
Distributions paid per common unit	$	1.900	$	1.900	$	2.500	$	2.485	$	2.465
Weighted average number of units outstanding — basic (1)		116,871		111,568		97,805		95,387		93,256
Weighted average number of units outstanding — diluted (2)		117,553		112,020		97,994		95,993		94,387

Balance Sheet Data	December 31,
(In thousands)	2010		2009		2008		2007		2006
Net real estate	$	4,404,027	$	4,446,650	$	4,479,697	$	4,839,482	$	4,252,459
Total assets		5,062,833		5,228,943		5,217,035		5,643,937		4,910,911
Total indebtedness		2,359,822		2,456,875		2,590,167		3,021,129		2,387,938
Owners’ equity		2,438,552		2,483,169		1,945,516		1,800,969		1,752,478

Other Data	Year Ended December 31,
(Dollars in thousands)	2010			2009			2008			2007			2006
Net cash provided by operating activities	$	298,957		$	302,861		$	261,985		$	346,752		$	324,573
Net cash (used in) provided by investing activities		(110,154	)		(9,992	)		56,517			(758,924	)		(334,942	)
Net cash (used in) provided by financing activities		(315,842	)		(74,033	)		(331,314	)		396,322			(327	)
Funds from operations available to common shareholders (3)		311,181			222,106			313,910			305,216			294,801
Total leaseable square footage of Wholly Owned Properties in Operation at end of period (in thousands)		65,241			64,384			63,799			62,079			59,160
Total leasable square footage of JV Properties in Operation at end of period (in thousands)		14,422			13,786			13,069			11,462			6,172
Wholly Owned Properties in Operation at end of period		637			639			654			649			672
JV Properties in Operation at end of period		98			96			95			91			48
Wholly Owned Properties in Operation percentage leased at end of period		90	%		89	%		91	%		93	%		94	%
JV Properties in Operation percentage leased at end of period		83	%		88	%		92	%		94	%		95	%

(1)	Basic weighted average number of shares includes vested Common Shares (Liberty Property Trust)/common units (Liberty Property Limited Partnership) outstanding during the year.
(2)	Diluted weighted average number of shares outstanding includes the vested and unvested Common Shares (Liberty Property Trust)/Common Units (Liberty Property Limited Partnership) outstanding during the year as well as the dilutive effect of outstanding options.
(3)	The National Association of Real Estate Investment Trusts (“NAREIT”) has issued a standard definition for Funds from operations (as defined below). The Securities and Exchange Commission has agreed to the disclosure of this non-GAAP financial measure on a per share basis in its Release No. 34-47226, Conditions for Use of Non-GAAP Financial Measures. The Company believes that the calculation of Funds from operations is helpful to investors and management as it is a measure of the Company’s operating performance that excludes depreciation and amortization and gains and losses from property dispositions. As a result, year over year comparison of Funds from operations reflects the impact on operations from trends in occupancy rates, rental rates, operating costs, development activities, general and administrative expenses, and interest costs, providing perspective not immediately apparent from net income. In addition, management believes that Funds from operations provides useful information to the investment community about the Company’s financial performance when compared to other REITs since Funds from operations is generally recognized as the standard for reporting the operating performance of a REIT. Funds from operations available to common shareholders is defined by NAREIT as net income (computed in accordance with generally accepted accounting principles (“GAAP”)), excluding gains (or losses) from sales of property, plus depreciation and amortization, and after adjustments for unconsolidated partnerships and joint ventures. Funds from operations available to common shareholders does not represent net income or cash flows from operations as defined by GAAP and does not necessarily indicate that cash flows will be sufficient to fund cash needs. It should not be considered as an alternative to net income as an indicator of the Company’s operating performance or to cash flows as a measure of liquidity. Funds from operations available to common shareholders also does not represent cash flows generated from operating, investing or financing activities as defined by GAAP. A reconciliation of Funds from operations to net income may be found on page 38.

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ITEM 7. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Overview

Liberty Property Trust (the “Trust”) is a self-administered and self-managed Maryland real estate investment trust (“REIT”). Substantially all of the Trust’s assets are owned directly or indirectly, and substantially all of the Trust’s operations are conducted directly or indirectly, by its subsidiary, Liberty Property Limited Partnership, a Pennsylvania limited partnership (the “Operating Partnership” and, collectively with the Trust and their consolidated subsidiaries, the “Company”).

The Company operates primarily in the Mid-Atlantic, Southeastern, Midwestern and Southwestern United States. Additionally, the Company owns certain assets in the United Kingdom.

As of December 31, 2010, the Company owned and operated 345 industrial and 292 office properties (the “Wholly Owned Properties in Operation”) totaling 65.2 million square feet. In addition, as of December 31, 2010, the Company owned 1,347 acres of developable land, substantially all of which is zoned for commercial use. Additionally, as of December 31, 2010, the Company had an ownership interest, through unconsolidated joint ventures, in 48 industrial and 50 office properties totaling 14.4 million square feet (the “JV Properties in Operation” and, together with the Wholly Owned Properties in Operation, the “Properties in Operation”). The Company also has an ownership interest through unconsolidated joint ventures in 627 acres of developable land, substantially all of which is zoned for commercial use.

The Company focuses on creating value for shareholders and increasing profitability and cash flow. With respect to its Properties in Operation, the Company endeavors to maintain high occupancy levels while increasing rental rates and controlling costs. The Company pursues development opportunities that it believes will create value and yield acceptable returns. The Company also acquires properties that it believes will create long-term value, and disposes of properties that no longer fit within the Company’s strategic objectives or in situations where it can optimize cash proceeds. The Company’s operating results depend primarily upon income from rental operations and are substantially influenced by rental demand for the Properties in Operation.

The recent economic disruption continues to adversely impact the Company’s business. Uncertainty about the pricing of commercial real estate as a general matter has reduced the Company’s ability to acquire real estate and to dispose of properties that are not consistent with our long term strategy. Similarly, although some signs of economic recovery have been noted, market conditions have not normalized. We will however be opportunistic in both our acquisition and disposition activity and anticipate taking advantage of opportunities as they arise.

Although we have seen some improvement in the general economy, the economy as it impacts our business has not returned to pre-recession levels. Rental demand for the Properties in Operation was flat for the year ended December 31, 2010 as compared to the year ended December 31, 2009. Despite this trend, the Company successfully leased 17.0 million square feet during the year ended December 31, 2010 and attained occupancy of 89.9% for the Wholly Owned Properties in Operation and 83.0% for the JV Properties in Operation for a combined occupancy of 88.7% for the Properties in Operation as of that date. The stagnant level of rental demand for properties was reflected in a decline during the year ended December 31, 2010 of straight line rents on renewal and replacement leases of 6.8%. At December 31, 2009, occupancy for the Wholly Owned Properties in Operation was 89.5% and for the JV Properties in Operation was 87.7% for a combined occupancy for the Properties in Operation of 89.2%. The Company believes that average occupancy for its Properties in Operation will be flat or increase by up to 2% for 2011 compared to 2010. The Company believes the occupancy for industrial-distribution properties will increase by 1% to 3% and this increase will be partially offset by decreases in occupancy of up to 2% for industrial-flex and office properties. Furthermore, the Company believes that straight line rents on renewal and replacement leases for 2011 will on average be 7% to 12% lower than rents on expiring leases.

The Company is currently distributing more in dividends than it receives in net cash provided by operating activities less customary tenant improvement and leasing transaction costs. Over time, increases in occupancy and rental rates could offset this shortfall. Should market opportunities allow the Company to accelerate its strategy relating to dispositions (i.e. sale of suburban office) without corresponding opportunities to reinvest those proceeds in the near term, this shortfall would increase. The Company will continually evaluate these circumstances opposite its distribution policies.

24

WHOLLY OWNED CAPITAL ACTIVITY

Acquisitions

During the year ended December 31, 2010, conditions for the acquisition of properties were challenging because of the economic disruption of the recent past and the reduced level of transaction volume causing less liquidity and less clarity on pricing. During the year ended December 31, 2010, the Company acquired five properties representing 1.2 million square feet for a Total Investment of $48.6 million. For 2011, the Company believes that wholly owned property acquisitions will be in the $25 million to $75 million range and that, similar to 2010, certain of the acquired properties will be either vacant or underleased. Should market conditions be favorable this range could be exceeded. To the extent deemed consistent with the Company’s strategy and under appropriate circumstances, the Company intends to increase its ownership of metro office, multi tenant industrial and industrial-flex properties.

“Total Investment” for a property is defined as the property’s purchase price plus closing costs (in the case of acquisitions if vacant) and management’s estimate, as determined at the time of acquisition, of the cost of necessary building improvements in the case of acquisitions, or land costs and land and building improvement costs in the case of development projects, and, where appropriate, other development costs and carrying costs.

Dispositions

During the year ended December 31, 2010, market conditions for dispositions were challenging because of the economic disruption of the recent past and the reduced level of transaction volume causing less liquidity and less clarity on pricing. Disposition activity allows the Company to, among other things, (1) reduce its holdings in certain markets and product types within a market; (2) lower the average age of the portfolio; (3) optimize the cash proceeds from the sale of certain assets; and (4) obtain funds for investment activities. During the year ended December 31, 2010, the Company realized proceeds of $32.0 million from the sale of 10 operating properties representing 678,000 square feet and 17 acres of land. For 2011, the Company believes it will realize proceeds of approximately $50 million to $100 million from the sale of operating properties. As with acquisitions, this range could be exceeded if favorable market conditions exist.

Development

During the year ended December 31, 2010, the Company brought into service three wholly owned properties under development representing 381,000 square feet and a Total Investment of $81.0 million and did not initiate any development. As of December 31, 2010 the Company has no wholly owned properties under development. The Company continues to pursue development opportunities. Given current market conditions, new development for 2011 will generally be build-to-suit or substantially pre-leased developments. Speculative development will be more modest and will need to be supported by strong local market conditions. Subsequent to December 31, 2010, the Company started the development, on a speculative basis, of two industrial-flex buildings and it signed leases (one of which is subject to certain approvals) committing it to the development of two 100% leased office buildings. The industrial-flex buildings are expected to contain a total of 103,000 square feet of leasable space and represent an anticipated Total Investment of $15 million. The office buildings are expected to contain a total of 360,000 square feet of leasable space and represent an anticipated Total Investment of $130 million.

JOINT VENTURE CAPITAL ACTIVITY

The Company periodically enters into joint venture relationships in connection with the execution of its real estate operating strategy.

Acquisitions

During the year ended December 31, 2010, none of the unconsolidated joint ventures in which the Company held an interest acquired any properties. For 2011, the Company believes that none of the unconsolidated joint ventures in which the Company holds an interest will acquire any properties.

Dispositions

During the year ended December 31, 2010, none of the unconsolidated joint ventures in which the Company held an interest disposed of any properties. For 2011, the Company does not anticipate that any unconsolidated joint ventures in which it holds an interest will dispose of any operating properties.

25

Development

During the year ended December 31, 2010, joint ventures in which the Company held an interest brought into service two properties under development representing 640,000 square feet and a Total Investment of $159.0 million and did not initiate any development. For 2011, the Company believes that none of the unconsolidated joint ventures in which the Company holds an interest will begin any development activities.

Forward-Looking Statements

When used throughout this report, the words “believes,” “anticipates,” “estimates” and “expects” and similar expressions are intended to identify forward-looking statements. Such statements indicate that assumptions have been used that are subject to a number of risks and uncertainties that could cause actual financial results or management plans and objectives to differ materially from those projected or expressed herein, including: the effect of national and regional economic conditions; rental demand; the Company’s ability to identify, and enter into agreements with suitable joint venture partners in situations where it believes such arrangements are advantageous; the Company’s ability to identify and secure additional properties and sites, both for itself and the joint ventures to which it is a party, that meet its criteria for acquisition or development; the current credit crisis and its impact on the availability and cost of capital; the effect of prevailing market interest rates; risks related to the integration of the operations of entities that we have acquired or may acquire; risks related to litigation; and other risks described from time to time in the Company’s filings with the SEC. Given these uncertainties, readers are cautioned not to place undue reliance on such statements.

Critical Accounting Policies and Estimates

The Company’s discussion and analysis of its financial condition and results of operations are based upon the Company’s consolidated financial statements, which have been prepared in accordance with U.S. generally accepted accounting principles. The preparation of these financial statements requires the Company to make estimates, judgments and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses. The Company bases these estimates, judgments and assumptions on historical experience and on other factors that are believed to be reasonable under the circumstances. Actual results may differ from these estimates under different assumptions or conditions.

The following critical accounting policies discussion reflects what the Company believes are the more significant estimates, assumptions and judgments used in the preparation of its Consolidated Financial Statements. This discussion of critical accounting policies is intended to supplement the description of the accounting policies in the footnotes to the Company’s Consolidated Financial Statements and to provide additional insight into the information used by management when evaluating significant estimates, assumptions and judgments. For further discussion of our significant accounting policies, see Note 2 to the Consolidated Financial Statements included in this report.

Capitalized Costs

Expenditures directly related to the acquisition or improvement of real estate, including interest and other costs capitalized on development projects and land being readied for development, are included in net real estate and are stated at cost. The Company considers a development property substantially complete upon the completion of tenant build-out, but no later than one year after the completion of major construction activity. The capitalized costs include pre-construction costs essential to the development of the property, construction costs, interest costs, real estate taxes, development related salaries and other costs incurred during the period of development. The determination to capitalize rather than expense costs requires the Company to evaluate the status of the development activity. Capitalized interest for the years ended December 31, 2010, 2009, and 2008 was $929,000, $7.6 million and $20.0 million, respectively. Effective January 1, 2009, certain acquisition-related costs are expensed as incurred.

Revenue Recognition

Rental revenue is recognized on a straight line basis over the terms of the respective leases. Deferred rent receivable represents the amount by which straight line rental revenue exceeds rents currently billed in accordance with the lease agreements. Above-market and below-market lease values for acquired properties are recorded based on the present value (using a discount rate which reflects the risks associated with the leases acquired) of the difference between (i) the contractual amounts to be paid pursuant to each in-place lease and (ii) management’s estimate of fair market lease rates for each corresponding in-place lease. The capitalized above or below-market lease values are amortized as a component of rental revenue over the remaining term of the respective leases.

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Allowance for Doubtful Accounts

The Company monitors the liquidity and creditworthiness of its tenants on an ongoing basis. A significant tenant has entered into a forbearance agreement with the Company. The forbearance agreement provides for the deferral of the tenant’s monthly obligation of $467,000 for the period from December 1, 2010 through June 30, 2011. The Company has reviewed its situation with this tenant and based upon this review and the review of its other tenants, provisions are established, and an allowance for doubtful accounts for estimated losses resulting from the inability of its tenants to make required rental payments is maintained. As of December 31, 2010 and 2009, the Company’s allowance for doubtful accounts totaled $11.3 million and $11.1 million, respectively. The Company’s bad debt expense for the years ended December 31, 2010, 2009 and 2008 was $3.9 million, $4.3 million and $4.8 million, respectively.

Impairment of Real Estate

The Company evaluates its real estate investments upon the occurrence of significant adverse changes in operations to assess whether any impairment indicators are present that could affect the recovery of the recorded value. Indicators the Company uses to determine whether an impairment evaluation is necessary include the low occupancy level of the property, holding period for the property, strategic decisions regarding future development plans for a property under development and land held for development and other market factors. If impairment indicators are present, the Company performs an undiscounted cash flow analysis and compares the net carrying amount of the property to the property’s estimated undiscounted future cash flow over the anticipated holding period. The Company assesses the expected undiscounted cash flows based upon estimated capitalization rates, historic operating results and market conditions that may affect the property. If any real estate investment is considered impaired, the carrying value of the property is written down to its estimated fair value. Fair value is estimated based on the discounting of future expected cash flows at a risk adjusted interest rate. During the years ended December 31, 2010, 2009 and 2008, the Company recognized impairment losses of $1.0 million, $9.5 million and $3.1 million, respectively. The determination of whether an impairment exists requires the Company to make estimates, judgments and assumptions about the future cash flows. The Company has evaluated each of its Properties and land held for development and has determined that there are no additional impairment charges that need to be recorded at December 31, 2010.

Intangibles

In accordance with Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 805, “Business Combinations,” the Company allocates the purchase price of real estate acquired to land, building and improvements and intangibles based on the relative fair value of each component. The value ascribed to in-place leases is based on the rental rates for the existing leases compared to the Company’s estimate of the fair market lease rates for leases of similar terms and present valuing the difference based on an interest rate which reflects the risks associated with the leases acquired. Origination values are also assigned to in-place leases, and, where appropriate, value is assigned to customer relationships. Origination cost estimates include the costs to execute leases with terms similar to the remaining lease terms of the in-place leases, including leasing commissions, legal and other related expenses. Additionally, the Company estimates carrying costs during the expected lease-up periods including real estate taxes, other operating expenses and lost rentals at contractual rates. The Company depreciates the amounts allocated to building and improvements over 40 years. The amounts allocated to the intangible relating to in-place leases, which are included in deferred financing and leasing costs or in other liabilities in the accompanying consolidated balance sheets, are amortized on a straight line basis over the remaining term of the related leases. In the event that a tenant terminates its lease, the unamortized portion of the intangible is written off.

Investments in Unconsolidated Joint Ventures

The Company analyzes its investments in joint ventures under FASB ASC 810, “Consolidation,” to determine if the joint venture is considered a variable interest entity and would require consolidation. The Company does not have any interests in variable interest entities. The Company accounts for its investments in unconsolidated joint ventures using the equity method of accounting as the Company exercises significant influence over, but does not control, these entities. These investments are recorded initially at cost, as Investments in Unconsolidated Joint Ventures, and subsequently adjusted for equity in earnings and cash contributions and distributions.

On a periodic basis, management assesses whether there are any indicators that the value of the Company’s investments in unconsolidated joint ventures may be impaired. An investment is impaired only if management’s estimate of the value of the investment is less than the carrying value of the investment, and such decline in value is deemed to be other than temporary. To the extent impairment has occurred, the loss is measured as the excess of the carrying amount of the investment over the estimated fair value of the investment.

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Management estimated the fair value of its ownership interest in the joint ventures considering the estimated fair value of the real estate assets owned by the joint ventures and the related indebtedness as well as the working capital assets and liabilities of the joint ventures and the terms of the related joint venture agreements. The Company’s estimates of fair value of the real estate assets are based on a discounted cash flow analysis incorporating a number of assumptions that are subject to economic and market uncertainties including, among others, demand for space, competition for tenants, current market rental rates, changes in market rental rates, operating costs, capitalization rates, holding periods and discount rates. For these assumptions, the Company considered its experience and historical performance in the various markets and data provided by market research organizations. In assessing whether the impairment is other-than-temporary the Company considers several factors. The longevity and severity of the impairment are considered as well as the expected time for recovery of value to occur, if ever.

The Company developed the 2010 budgets for its unconsolidated joint ventures during the fourth quarter of 2009. For certain of the unconsolidated joint ventures, the budgets suggested a continuing situation of weak demand for space and intense competition for tenants leading to another year of stagnant rents. This continuing and sustained impairment in value as suggested by the 2010 budgets and the other assessment considerations described above caused the Company to conclude that the decline in value was other than temporary for four of the Company’s investments in unconsolidated joint ventures.

With respect to impairment losses recognized during the year ended December 31, 2009, the Company’s investments in unconsolidated joint ventures as of December 31, 2009 before and after the impairment charge are as follows (in thousands):

	December 31, 2009
	Before				After
	Impairment		Impairment		Impairment
Liberty Venture I, LP	$	11,238	$	—	$	11,238
Kings Hill Unit Trust		3,198		—		3,198
Liberty Illinois, LP		26,531		6,964		19,567
Liberty AIPO LP		13,302		—		13,302
Silversword Properties, Ltd.		10,618		2,170		8,448
Cambridge Medipark Ltd.		6,618		—		6,618
Blythe Valley JV Sarl		8,991		5,608		3,383
Liberty Washington, LP		137,429		64,060		73,369
Liberty Commerz 1701 JFK Boulevard, LP		36,461		—		36,461
Total	$	254,386	$	78,802	$	175,584

Determining values in the current market is inherently difficult and is based on the Company’s assessment of a number of factors which are difficult to predict. The market may decline further and future impairment charges may be needed.

No impairment losses on the Company’s investments in unconsolidated joint ventures were recognized during the years ended December 31, 2010 or 2008.

Results of Operations

The following discussion is based on the consolidated financial statements of the Company. It compares the results of operations of the Company for the year ended December 31, 2010 with the results of operations of the Company for the year ended December 31, 2009, and the results of operations of the Company for the year ended December 31, 2009 with the results of operations of the Company for the year ended December 31, 2008. As a result of the varying level of development, acquisition and disposition activities by the Company in 2010, 2009 and 2008, the overall operating results of the Company during such periods are not directly comparable. However, certain data, including the Same Store (as defined below) results, do lend themselves to direct comparison.

This information should be read in conjunction with the accompanying consolidated financial statements and notes included elsewhere in this report.

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Comparison of Year Ended December 31, 2010 to Year Ended December 31, 2009

Overview

The Company’s average gross investment in operating real estate owned for the year ended December 31, 2010 increased to $5,184.9 million from $4,973.6 million for the year ended December 31, 2009. This increase in operating real estate owned resulted in increases in rental revenue, operating expense reimbursement, rental property operating expenses and depreciation and amortization expense.

Total operating revenue increased to $746.8 million for the year ended December 31, 2010 from $739.4 million for the year ended December 31, 2009. This $7.4 million increase was primarily due to the increase in investment in operating real estate. This increase was also due to an increase in “Termination Fees,” which totaled $6.1 million for the year ended December 31, 2010 as compared to $4.5 million for the year ended December 31, 2009. These increases were partially offset by decreases in revenues for the Same Store properties because of decreases in rental rates and decreases in occupancy for the industrial-flex and office properties. Termination Fees are fees that the Company agrees to accept in consideration for permitting certain tenants to terminate their leases prior to the contractual expiration date. Termination Fees are included in rental revenue and if a property is sold, related termination fees are included in discontinued operations. See “Other,” below.

Segments

The Company evaluates the performance of the Properties in Operation based on property level operating income by reportable segment (see Note 13 to the Company’s financial statements for reconciliation to net income). The following table identifies changes in reportable segments (dollars in thousands):

Property Level Operating Income:

	Year Ended December 31,				Percentage
	2010		2009		Increase (Decrease)
Northeast
— Southeastern PA	$	121,572	$	124,078		(2.0	%)
— Lehigh/Central PA		77,031		72,239		6.6	%(1)
— New Jersey		18,333		18,127		1.1	%
Midwest		47,636		51,185		(6.9	%)(2)
Mid-Atlantic		93,033		96,063		(3.2	%)
South		123,965		123,011		0.8	%
Philadelphia/D.C.		21,548		16,848		27.9	%(1)
United Kingdom		3,279		3,468		(5.4	%)
Total property level operating income (3)	$	506,397	$	505,019		0.3	%

(1)	The increase was primarily due to an increase in average gross investment in operating real estate, an increase in occupancy, and an increase in rental rates.
(2)	The decrease was primarily due to a decrease in occupancy. This decrease was partially offset by increases in average gross investment in operating real estate and rental rates.
(3)	See a reconciliation of property level operating income to net income in the Same Store comparison below.

Same Store

Property level operating income, exclusive of Termination Fees, for the Same Store properties decreased to $475.0 million for the year ended December 31, 2010 from $490.9 million for the year ended December 31, 2009, on a straight line basis (which recognizes rental revenue evenly over the life of the lease), and decreased to $467.1 million for the year ended December 31, 2010 from $476.9 million for the year ended December 31, 2009 on a cash basis. These decreases of 3.2% and 2.0%, respectively, were primarily due to a decrease in occupancy for industrial-flex and office properties.

Management generally considers the performance of the Same Store properties to be a useful financial performance measure because the results are directly comparable from period to period. Management further believes that the performance comparison should exclude Termination Fees since they are more event specific and are not representative of ordinary performance results. In addition, Same Store property level operating income and Same Store cash basis property level operating income exclusive of Termination Fees are considered by management to be more reliable indicators of the portfolio’s baseline performance. The Same Store properties consist of the 615 properties totaling approximately 60.8 million square feet owned on January 1, 2009 and excluding properties sold through December 31, 2010.

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Set forth below is a schedule comparing the property level operating income, on a straight line basis and on a cash basis, for the Same Store properties for the years ended December 31, 2010 and 2009. Same Store property level operating income and cash basis property level operating income are non-GAAP measures and do not represent income before property dispositions, income taxes, equity in earnings of unconsolidated joint ventures and impairment charges because they do not reflect the consolidated operations of the Company. Investors should review Same Store results, along with Funds from operations (see “Liquidity and Capital Resources” section), GAAP net income and net cash flow from operating activities, investing activities and financing activities when considering the Company’s operating performance. Also set forth below is a reconciliation of Same Store property level operating income and cash basis property level operating income to net income (in thousands).

	Year Ended December 31,
	2010			2009
Same Store:
Rental revenue	$	488,755		$	501,457
Operating expenses:
Rental property expense		150,349			148,353
Real estate taxes		80,128			81,820
Operating expense recovery		(216,688	)		(219,573	)
Unrecovered operating expenses		13,789			10,600
Property level operating income		474,966			490,857
Less straight line rent adjustment		7,845			13,999
Cash basis property level operating income	$	467,121		$	476,858
Reconciliation of non-GAAP financial measure — Same Store:
Cash basis property level operating income	$	467,121		$	476,858
Straight line rent adjustment		7,845			13,999
Same Store property level operating income		474,966			490,857
Property level operating income — properties purchased or developed subsequent to January 1, 2009		25,320			9,703
Termination fees		6,111			4,459
Property level operating income		506,397			505,019
General and administrative expense		(52,850	)		(51,237	)
Depreciation and amortization expense		(173,402	)		(169,818	)
Other income (expense)		(139,281	)		(135,883	)
Gain on property dispositions		4,616			1,687
Income taxes		(1,736	)		(494	)
Equity in earnings of unconsolidated joint ventures		2,296			2,161
Impairment charges — investment in unconsolidated joint ventures and other		(378	)		(82,552	)
— goodwill		—			(15,700	)
Discontinued operations		7,713			25,809
Net income	$	153,375		$	78,992

General and Administrative

General and administrative expenses increased to $52.9 million for the year ended December 31, 2010 from $51.2 million for the year ended December 31, 2009. This increase was primarily due to a decrease in expenses capitalized due to the decrease in development activity.

Depreciation and Amortization

Depreciation and amortization increased to $173.4 million for the year ended December 31, 2010 from $169.8 million for the year ended December 31, 2009. The increase was primarily due to the increase in average gross investment in operating real estate during the respective periods and particularly the increased investment in tenant improvement costs, which are depreciated over a shorter period than buildings.

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Interest Expense

Interest expense increased to $149.3 million for the year ended December 31, 2010 from $148.9 million for the year ended December 31, 2009. This increase was primarily due to a decrease of $6.7 million in interest that was capitalized due to the decrease in development activity and because of $2.1 million in expense in 2010 relating to the prepayment of $119.3 million of secured loans. The effect of these items was partially offset by a decrease in interest expense because of the decrease in the average debt outstanding, which was $2,354.7 million for the year ended December 31, 2010, compared to $2,503.8 million for the year ended December 31, 2009. The weighted average interest rate was unchanged at 6.2% for the years ended December 31, 2010 and 2009.

Interest expense allocated to discontinued operations for the years ended December 31, 2010 and 2009 was $384,000 and $2.9 million, respectively. This decrease was due to the decrease in the level of dispositions in 2010 compared to 2009.

Other

Gain on property dispositions increased to $4.6 million for the year ended December 31, 2010 from $1.7 million for the year ended December 31, 2009.

During the year ended December 31, 2009, the Company recognized in income from continuing operations $98.3 million in impairment charges. These impairment charges primarily result from $78.8 million of impairment charges relating to the other-than-temporary decline in fair value below the carrying values of certain of the Company’s investments in unconsolidated joint ventures. During 2009, the Company also wrote off the $15.7 million of goodwill and other intangibles relating to its October 2007 acquisition of Republic Property Trust. Impairment charges in continuing operations in 2010 were $400,000.

During the year ended December 31, 2009, the Company purchased $11.4 million of its 7.75% senior notes due April 2009, $6.9 million of its 8.50% senior notes due August 2010, $3.5 million of its 7.25% senior notes due March 2011, $4.9 million of its 6.375% senior notes due August 2012 and $3.5 million of its 6.625% senior notes due October 2017. These notes were purchased at an aggregate $1.5 million discount. This discount is included in net income for the year ended December 31, 2009 as debt extinguishment gain. There were no such transactions in 2010.

Income from discontinued operations decreased to $7.7 million from $25.8 million for the year ended December 31, 2010 compared to the year ended December 31, 2009. The decrease is due to lower operating income and the decrease in gains recognized on sales (net of impairment charges) which were $6.9 million for the year ended December 31, 2010 compared to $17.9 million for the year ended December 31, 2009. Also contributing to this decrease was a decrease in termination fees in discontinued operations which equaled $400,000 in 2010 and $4.8 million in 2009.

As a result of the foregoing, the Company’s net income increased to $153.4 million for the year ended December 31, 2010 from $79.0 million for the year ended December 31, 2009.

Comparison of Year Ended December 31, 2009 to Year Ended December 31, 2008

Overview

The Company’s average gross investment in operating real estate owned for the year ended December 31, 2009 increased to $4,973.6 million from $4,861.8 million for the year ended December 31, 2008. This increase in operating real estate resulted in increases in rental revenue, operating expense reimbursement, rental property operating expenses, real estate taxes and depreciation and amortization expense.

Total operating revenue increased to $739.4 million for the year ended December 31, 2009 from $725.5 million for the year ended December 31, 2008. This $13.9 million increase was primarily due to the increase in investment in operating real estate and the increase in operating revenue from the “Prior Year Same Store” (as defined below) group of properties, discussed below, as well as an increase in Termination Fees, which totaled $4.5 million for the year ended December 31, 2009 as compared to $3.8 million for the year ended December 31, 2008. Termination Fees are included in rental revenue.

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Segments

The Company evaluates the performance of the Properties in Operation based on property level operating income by reportable segment (see Note 13 to the Company’s Consolidated Financial Statements for a reconciliation to net income). The following table identifies changes in reportable segments (dollars in thousands):

Property Level Operating Income:

	Year Ended December 31,				Percentage
	2009		2008		Increase (Decrease)
Northeast
— Southeastern PA	$	124,078	$	118,552		4.7	%
— Lehigh/Central PA		72,239		68,856		4.9	%
— New Jersey		18,127		19,408		(6.6	%)(1)
Midwest		51,185		51,696		(1.0	%)
Mid-Atlantic		96,063		98,290		(2.3	%)
South		123,011		113,194		8.7	%(2)
Philadelphia/D.C.		16,848		21,634		(22.1	%)(3)
United Kingdom		3,468		3,295		5.3	%
Total property level operating income (4)	$	505,019	$	494,925		2.0	%

(1)	The decrease was primarily due to decreases in occupancy and rental rates. This was partially offset by an increase in average gross investment in operating real estate.
(2)	The increase was primarily due to increases in average gross investment in operating real estate and rental rates.
(3)	The decrease was primarily due to the effect of Comcast Center operation during the relevant periods. Comcast Center was a wholly owned 1,250,000 square foot development property which came into service incrementally from the third quarter of 2007 through the first quarter of 2008. The property was transferred to an unconsolidated joint venture in which the Company holds an interest on March 31, 2008.
(4)	See a reconciliation of property level operating income to net income in the Same Store comparison below.

Same Store

Property level operating income, exclusive of Termination Fees, for the Prior Year Same Store properties increased to $481.3 million for the year ended December 31, 2009 from $478.6 million for the year ended December 31, 2008, on a straight line basis, and increased to $468.9 million for the year ended December 31, 2009 from $467.1 million for the year ended December 31, 2008 on a cash basis. These increases of 0.6% and 0.4%, respectively, were primarily due to an increase in occupancy for office properties.

Management generally considers the performance of the Prior Year Same Store properties to be a useful financial performance measure because the results are directly comparable from period to period. Management further believes that the performance comparison should exclude Termination Fees since they are more event specific and are not representative of ordinary performance results. In addition, Prior Year Same Store property level operating income and Prior Year Same Store cash basis property level operating income exclusive of Termination Fees are considered by management to be more reliable indicators of the portfolio’s baseline performance. The Prior Year Same Store properties consist of the 610 properties totaling approximately 58.4 million square feet owned on January 1, 2008 and excluding properties sold through December 31, 2009.

Set forth below is a schedule comparing the property level operating income, on a straight line basis and on a cash basis, for the Prior Year Same Store properties for the years ended December 31, 2009 and 2008. Prior Year Same Store property level operating income and Prior Year Same Store cash basis property level operating income are non-GAAP measures and do not represent income before property dispositions, income taxes, equity in earnings of unconsolidated joint ventures and impairment charges because they do not reflect the consolidated operations of the Company. Investors should review Prior Year Same Store results, along with Funds from operations (see “Liquidity and Capital Resources” section), GAAP net income and net cash flow from operating activities, investing activities and financing activities when considering the Company’s operating performance. Also, set forth below is a reconciliation of Prior Year Same Store property level operating income to net income (in thousands).

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	Year Ended December 31,
	2009			2008
Prior Year Same Store:
Rental revenue	$	491,386		$	488,334
Operating expenses:
Rental property expense		147,510			148,784
Real estate taxes		79,454			80,407
Operating expense recovery		(216,880	)		(219,487	)
Unrecovered operating expenses		10,084			9,704
Property level operating income		481,302			478,630
Less straight line rent adjustment		12,438			11,530
Cash basis property level operating income	$	468,864		$	467,100
Reconciliation of non-GAAP financial measure — Prior Year Same Store:
Cash basis property level operating income	$	468,864		$	467,100
Straight line rent adjustment		12,438			11,530
Same Store property level operating income		481,302			478,630
Property level operating income — properties purchased or developed subsequent to January 1, 2008		21,852			16,017
Less: Property level operating income — 2010 discontinued operations		(2,594	)		(3,495	)
Termination fees		4,459			3,773
Property level operating income		505,019			494,925
General and administrative expense		(51,237	)		(54,462	)
Depreciation and amortization expense		(169,818	)		(168,148	)
Other income (expense)		(135,883	)		(136,259	)
Gain on property dispositions		1,687			10,572
Income taxes		(494	)		(1,645	)
Equity in earnings of unconsolidated joint ventures		2,161			2,805
Impairment charges — investment in unconsolidated joint ventures and other		(82,552	)		—
—goodwill		(15,700	)		—
Discontinued operations at December 31, 2009		24,810			30,546
2010 discontinued operations		999			1,772
Net income	$	78,992		$	180,106

General and Administrative

General and administrative expenses decreased to $51.2 million for the year ended December 31, 2009 from $54.5 million for the year ended December 31, 2008. This decrease was primarily due to a decrease in number of employees and their corresponding compensation and decreases in cancelled projects and other discretionary expenses. These decreases were partially offset by increases in long term incentive compensation.

Depreciation and Amortization

Depreciation and amortization increased to $169.8 million for the year ended December 31, 2009 from $168.1 million for the year ended December 31, 2008. The increase was primarily due to the increase in average gross investment in operating real estate during the respective periods and particularly the increased investment in tenant improvement costs, which are depreciated over a shorter period than buildings.

Interest Expense

Interest expense decreased to $148.9 million for the year ended December 31, 2009 from $152.2 million for the year ended December 31, 2008. This decrease was related to a decrease in the average debt outstanding, which was $2,503.8 million for the year ended December 31, 2009, compared to $2,833.9 million for the year ended December 31, 2008. The effect of the decrease in the average debt outstanding was partially offset by an increase in the weighted average interest rate to 6.2% for the year ended December 31, 2009 from 6.1% for the year ended December 31, 2008. Partially offsetting the decrease in interest expense was the decrease in interest that was capitalized due to the decrease in development activity.

Interest expense allocated to discontinued operations for the years ended December 31, 2009 and 2008 was $2.9 million and $5.7 million, respectively. This decrease was due to the decrease in the level of dispositions in 2009 compared to 2008.

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Other

Gain on property dispositions decreased to $1.7 million for the year ended December 31, 2009 from $10.6 million for the year ended December 31, 2008. The decrease was primarily due to the recognition in 2008 of gain on the sale of Comcast Center to a joint venture in which the Company retains an interest (see Note 4 to the Company’s Consolidated Financial Statements).

During the year ended December 31, 2009, the Company recognized in continuing operations $98.3 million in impairment charges. These impairment charges primarily result from $78.8 million of impairment charges that the Company recognized in the fourth quarter of 2009 relating to the other-than-temporary decline in fair value below the carrying values of certain of the Company’s investments in unconsolidated joint ventures. During 2009, the Company also wrote off the $15.7 million of goodwill and other intangibles relating to its October 2007 acquisition of Republic Property Trust. There were no similar impairment charges in 2008.

During the year ended December 31, 2009, the Company purchased $11.4 million of its 7.75% Senior Notes due April 2009, $6.9 million of its 8.50% Senior Notes due August 2010, $3.5 million of its 7.25% Senior Notes due March 2011, $4.9 million of its 6.375% Senior Notes due August 2012 and $3.5 million of its 6.625% Senior Notes due October 2017. These notes were purchased at an aggregate $1.5 million discount. During the year ended December 31, 2008, the Company purchased $23.4 million of its 8.50% Senior Notes due August 2010. These notes were purchased at a $2.5 million discount. These discounts are included in net income as debt extinguishment gains.

Income from discontinued operations decreased to $25.8 million from $32.3 million for the year ended December 31, 2009 compared to the year ended December 31, 2008. The decrease is due to lower operating income and the decrease in gains recognized on sales (net of impairment charges) which were $17.9 million for the year ended December 31, 2009 compared to $23.5 million for the year ended December 31, 2008. These decreases were partially offset by termination fees in discontinued operations which equaled $4.8 million in 2009 and $94,000 in 2008.

As a result of the foregoing, the Company’s net income decreased to $79.0 million for the year ended December 31, 2009 from $180.1 million for the year ended December 31, 2008.

Liquidity and Capital Resources

Overview

The Company anticipates that it will need approximately $50 million to $100 million to fund 2011 development starts. The Company’s 2011 debt maturities total approximately $253 million. The Company anticipates that it will invest $25 million to $75 million in acquisitions in 2011. The Company believes that proceeds from asset sales, its available cash, borrowing capacity from its Credit Facility (as defined below) and its other sources of capital including the public debt and equity markets will provide it with sufficient funds to satisfy these obligations. The Company expects to realize approximately $50 million to $100 million in proceeds from asset sales in 2011.

Activity

As of December 31, 2010, the Company had cash and cash equivalents of $157.9 million, including $49.5 million in restricted cash.

Net cash flow provided by operating activities decreased to $299.0 million for the year ended December 31, 2010 from $302.9 million for the year ended December 31, 2009. This $3.9 million decrease was primarily due to a decrease in operating results related to the decreases in occupancy and rental rates of the Company’s Properties in Operation offset by fluctuations in operating assets and liabilities. Net cash flow provided by operating activities is the primary source of liquidity to fund distributions to shareholders and for the recurring capital expenditures and leasing transaction costs for the Company’s Wholly Owned Properties in Operation.

Net cash used in investing activities was $110.2 million for the year ended December 31, 2010 compared to $10.0 million for the year ended December 31, 2009. The Company funded its development activity including investments in land held for development in 2010 and 2009 with proceeds from property dispositions. This net activity decreased by $65.3 million between 2010 and 2009. In addition, the Company acquired properties for Total Investment of $48.6 million during 2010. There were no acquisitions of properties during 2009.

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Net cash used in financing activities was $315.8 million for the year ended December 31, 2010 compared to $74.0 million for the year ended December 31, 2009. This $241.8 million change was primarily due to the decrease in proceeds from the issuance of Common Shares. Net cash provided by or used in financing activities includes proceeds from the issuance of equity and debt, net of debt repayments and equity repurchases and shareholder distributions. Cash provided by financing activities is a source of capital utilized by the Company to fund investment activities.

The Company funds its development activities and acquisitions with long-term capital sources and proceeds from the disposition of properties. For the year ended December 31, 2010, a portion of these activities were funded through an unsecured $600 million credit facility (the “$600 million Credit Facility”). In August 2010, the Company replaced the $600 million Credit Facility with a new unsecured $500 million Credit Facility (the “Credit Facility”). The interest rate on borrowings under the Credit Facility fluctuates based upon ratings from Moody’s Investors Service, Inc. (“Moody’s”), Standard and Poor’s Financial Services LLC (“S&P”) and Fitch, Inc. (“Fitch”). Based on the Company’s present ratings, borrowings under the Credit Facility are priced at LIBOR plus 230 basis points.

Additionally, the Company has entered into an agreement to fund its planned improvements for the Kings Hill land development project. At December 31, 2010, the Company had not drawn any funds from a £7 million revolving credit facility. The facility expires on November 22, 2011.

The Company uses debt financing to lower its overall cost of capital in an attempt to increase the return to shareholders. The Company staggers its debt maturities and maintains debt levels it considers to be prudent. In determining its debt levels, the Company considers various financial measures including the debt to gross assets ratio and the fixed charge coverage ratio. As of December 31, 2010 the Company’s debt to gross assets ratio was 38.3%, and for the year ended December 31, 2010, the fixed charge coverage ratio was 2.7x. Debt to gross assets equals total long-term debt including borrowings under the Credit Facility divided by total assets plus accumulated depreciation. The fixed charge coverage ratio equals income from continuing operations before property dispositions and impairment charges, including operating activity from discontinued operations, plus interest expense and depreciation and amortization, divided by interest expense, including capitalized interest, plus distributions on preferred units.

As of December 31, 2010, $320.7 million in mortgage loans and $2,039.1 million in unsecured notes were outstanding with a weighted average interest rate of 6.0%. The interest rates on $2,319.7 million of mortgage loans and unsecured notes are fixed and range from 4.5% to 8.8%. The weighted average remaining term for the Company’s mortgage loans and unsecured notes is 5.1 years.

The Company’s contractual obligations, as of December 31, 2010, are as follows (in thousands):

	Payments Due By Period
			Less than 1						More than
Contractual Obligations (2)	Total		year		1-3 years		3-5 years		5 years
Long-term debt (1)	$	2,944,934	$	370,493	$	797,619	$	1,305,905	$	470,917
Land purchase obligations		4,825		438		376		2,888		1,123
Operating lease obligations		13,183		866		1,282		750		10,285
Share of debt of unconsolidated joint ventures (1)		388,957		56,097		93,876		30,303		208,681
Joint venture capital commitments		4,087		2,683		1,404		—		—
Tenant contractual obligations		35,654		32,311		1,210		1,678		455
Share of tenant contractual obligations of unconsolidated joint ventures		3,051		3,022		—		29		—
Letter of credit		934		934		—		—		—
Share of letter of credit of unconsolidated joint ventures		1,250		1,250		—		—		—
Total	$	3,396,875	$	468,094	$	895,767	$	1,341,553	$	691,461

(1)	Includes principal and interest payments. Interest payments assume Credit Facility borrowings and interest rates remain at the December 31, 2010 level until maturity.
(2)	Subsequent to December 31, 2010, the Company committed itself to the development of four buildings. The anticipated Total Investment of these buildings is $145 million.

35

General

The Company believes that its existing sources of capital will provide sufficient funds to finance its continued development and acquisition activities. The Company’s existing sources of capital include the public debt and equity markets, proceeds from secured financing of properties, proceeds from property dispositions, equity capital from joint venture partners and net cash provided by operating activities. Additionally, the Company expects to incur variable rate debt, including borrowings under the Credit Facility, from time to time.

During the period from January 1, 2009 through December 31, 2009, the Company closed on mortgages totaling $330.3 million bearing interest at a weighted average interest rate of 7.1%. The net proceeds of the offering were used to pay outstanding borrowings under the $600 million Credit Facility and for general corporate purposes.

In January 2009, the Company satisfied a $20 million 8.125% medium term unsecured note due January 2009.

During the period from January 1, 2009 through December 31, 2009 the Company purchased $11.4 million of its 7.75% senior notes due April 2009, $6.9 million of its 8.50% senior notes due August 2010, $3.5 million of its 7.25% senior notes due March 2011, $4.9 million of its 6.375% senior notes due August 2012 and $3.5 million of its 6.625% senior notes due October 2017. These purchases resulted in an aggregate $1.5 million loan extinguishment gain.

In April 2009, the Company repaid $238.6 million of 7.75% senior notes due April 2009.

In April 2010, the Company repaid $119.3 million of mortgage loans. The weighted average interest rate of these loans as of March 31, 2010 was 7.3%.

In August 2010, the Company repaid $169.7 million of 8.50% senior notes due August 2010.

In August 2010, the Company replaced its existing $600 million Credit Facility which was due in January 2011 with the Credit Facility. The Credit Facility is for $500 million. It matures in November 2013. Based upon the Company’s current credit ratings, borrowings under the Credit Facility bear interest at LIBOR plus 230 basis points.

In September 2010, the Company issued $350 million of ten-year, 4.75% senior notes. The net proceeds from this issuance were used to repay borrowings under the Credit Facility and for general corporate purposes.

In November 2008, the quarterly Common Share dividend was decreased to $0.475 per share from $0.625 per share. The Company’s annual Common Share dividend paid was $1.90 per share, $1.90 per share, and $2.50 per share in 2010, 2009, and 2008, respectively.

The Company has an effective S-3 shelf registration statement on file with the SEC pursuant to which the Trust and the Operating Partnership may issue an unlimited amount of equity securities and debt securities.

36

Off-Balance Sheet Arrangements

As of December 31, 2010, the Company had investments in and advances to unconsolidated joint ventures totaling $171.9 million.

Calculation of Funds from Operations

The National Association of Real Estate Investment Trusts (“NAREIT”) has issued a standard definition for Funds from operations (as defined below). The SEC has agreed to the disclosure of this non-GAAP financial measure on a per share basis in its Release No. 34-47226, Conditions for Use of Non-GAAP Financial Measures. The Company believes that the calculation of Funds from operations is helpful to investors and management as it is a measure of the Company’s operating performance that excludes depreciation and amortization and gains and losses from property dispositions. As a result, year over year comparison of Funds from operations reflects the impact on operations from trends in occupancy rates, rental rates, operating costs, development activities, general and administrative expenses, and interest costs, providing perspective not immediately apparent from net income. In addition, management believes that Funds from operations provides useful information to the investment community about the Company’s financial performance when compared to other REITs since Funds from operations is generally recognized as the standard for reporting the operating performance of a REIT. Funds from operations available to common shareholders is defined by NAREIT as net income (computed in accordance with generally accepted accounting principles (“GAAP”)), excluding gains (or losses) from sales of property, plus depreciation and amortization, and after adjustments for unconsolidated partnerships and joint ventures. Funds from operations available to common shareholders does not represent net income or cash flows from operations as defined by GAAP and does not necessarily indicate that cash flows will be sufficient to fund cash needs. It should not be considered as an alternative to net income as an indicator of the Company’s operating performance or to cash flows as a measure of liquidity. Funds from operations available to common shareholders also does not represent cash flows generated from operating, investing or financing activities as defined by GAAP.

37

Funds from operations (“FFO”) available to common shareholders for the years ended December 31, 2010, 2009 and 2008 are as follows (in thousands, except per share amounts):

	Year Ended December 31,
	2010			2009			2008
Reconciliation of net income to FFO — basic
Net income available to common shareholders (1)	$	127,762		$	56,376		$	151,942
Basic — income available to common shareholders		127,762			56,376			151,942
Basic — income available to common shareholders per weighted average share	$	1.13		$	0.52		$	1.62
Adjustments:
Depreciation and amortization of unconsolidated joint ventures		14,927			16,180			16,235
Depreciation and amortization		171,682			170,633			173,400
Gain on property dispositions		(7,626	)		(23,197	)		(34,336	)
Noncontrolling interest share in addback for depreciation and amortization and gain on property dispositions		(5,998	)		(5,801	)		(6,606	)
Funds from operations available to common shareholders — basic	$	300,747		$	214,191		$	300,635
Basic Funds from operations available to common shareholders per weighted average share	$	2.66		$	1.99		$	3.21
Reconciliation of net income to FFO — diluted
Net income available to common shareholders (1)	$	127,762		$	56,376		$	151,942
Diluted — income available to common shareholders		127,762			56,376			151,942
Diluted — income available to common shareholders per weighted average share	$	1.12		$	0.52		$	1.62
Adjustments:
Depreciation and amortization of unconsolidated joint ventures		14,927			16,180			16,235
Depreciation and amortization		171,682			170,633			173,400
Gain on property dispositions		(7,626	)		(23,197	)		(34,336	)
Noncontrolling interest less preferred share distributions		4,436			2,114			6,669
Funds from operations available to common shareholders — diluted	$	311,181		$	222,106		$	313,910
Diluted Funds from operations available to common shareholders per weighted average share	$	2.65		$	1.98		$	3.20
Reconciliation of weighted average shares:
Weighted average Common Shares — all basic calculations		112,924			107,550			93,615
Dilutive shares for long term compensation plans		682			452			189
Diluted shares for net income calculations		113,606			108,002			93,804
Weighted average common units		3,947			4,018			4,190
Diluted shares for Funds from operations calculations		117,553			112,020			97,994

(1) Includes non-cash impairment charges of $94.5 million for the year ended December 31, 2009 relating to the other-than-temporary decline in the fair values below the carrying values of certain of the Company’s investments in unconsolidated joint ventures and goodwill.

Inflation

Inflation has remained relatively low in recent years, and as a result, it has not had a significant impact on the Company during this period. To the extent an increase in inflation would result in increased operating costs, such as insurance, real estate taxes and utilities, substantially all of the tenants’ leases require the tenants to absorb these costs as part of their rental obligations. In addition, inflation also may have the effect of increasing market rental rates.

38

ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

The following discussion about the Company’s risk management includes forward-looking statements that involve risks and uncertainties. Actual results could differ materially from the results discussed in the forward-looking statements.

The carrying value of cash and cash equivalents, restricted cash, accounts receivable, accounts payable, accrued interest, dividends and distributions payable and other liabilities are reasonable estimates of fair value because of the short-term nature of these instruments. The fair value of the Company’s long-term debt, which is based on estimates by management and on rates quoted on December 31, 2010 for comparable loans, is greater than the aggregate carrying value by approximately $189.0 million at December 31, 2010.

The Company’s primary market risk exposure is to changes in interest rates. The Company is exposed to market risk related to its Credit Facility and certain other indebtedness as discussed in “Management’s Discussion and Analysis of Financial Condition and Results of Operations — Liquidity and Capital Resources.”

The Company also uses long-term and medium-term debt as a source of capital. These debt instruments are typically issued at fixed interest rates. When these debt instruments mature, the Company typically refinances such debt at then-existing market interest rates which may be more or less than the interest rates on the maturing debt. In addition, the Company may attempt to reduce interest rate risk associated with a forecasted issuance of new debt. In order to reduce interest rate risk associated with these transactions, the Company occasionally enters into interest rate protection agreements.

If the interest rates for variable rate debt were 100 basis points higher or lower during 2010, the Company’s interest expense would have increased or decreased by $1.4 million. If the interest rate for the fixed rate debt maturing in 2011 was 100 basis points higher or lower than its current rate of 7.25%, the Company’s interest expense would have increased or decreased by $497,000.

The sensitivity analysis above assumes no changes in the Company’s financial structure. It also does not consider future fluctuations in interest rates or the specific actions that might be taken by management to mitigate the impact of such fluctuations.

The Company is also exposed to currency risk on its net investment in the United Kingdom. The Company does not believe that this currency risk exposure is material to its financial statements.

ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

The dual presentation of financial statements for the Company is required by the SEC. The Company is comprised of two SEC registrants: Liberty Property Trust and Liberty Property Limited Partnership. Accordingly, financial statements are required for each registrant. The financial information contained within the two sets of financial statements is essentially the same.

39

Management’s Annual Report on Internal Control Over Financial Reporting

The Company’s management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rules 13a — 15 (f) and 15d — 15(f). The Company’s internal control system was designed to provide reasonable assurance to the Company’s management and Board of Trustees regarding the preparation and fair presentation of published financial statements.

Under the supervision and with the participation of our management, including the Chief Executive Officer and Chief Financial Officer, we assessed the effectiveness of the Company’s internal control over financial reporting as of December 31, 2010. In making this assessment, we used the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commissions (COSO) in Internal Control — Integrated Framework. Based on our assessment we believe that, as of December 31, 2010, the Company’s internal control over financial reporting is effective based on those criteria.

The Company’s independent registered public accounting firm, Ernst & Young LLP, has issued an attestation report on the Company’s internal controls over financial reporting, which is included in this Annual Report on Form 10-K.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

40

Report of Independent Registered Public Accounting Firm

The Board of Trustees and Shareholders of Liberty Property Trust

We have audited Liberty Property Trust’s (the “Trust”) internal control over financial reporting as of December 31, 2010, based on criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (the COSO criteria). The Trust’s management is responsible for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting included in the accompanying Management’s Annual Report on Internal Control Over Financial Reporting. Our responsibility is to express an opinion on the Trust’s internal control over financial reporting based on our audit.

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

In our opinion, Liberty Property Trust maintained, in all material respects, effective internal control over financial reporting as of December 31, 2010, based on the COSO criteria.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheets as of December 31, 2010 and 2009, and the related consolidated statements of operations, equity, and cash flows for each of the three years in the period ended December 31, 2010 of Liberty Property Trust and our report dated February 25, 2011 expressed an unqualified opinion thereon.

/s/ Ernst & Young LLP

Philadelphia, Pennsylvania
February 25, 2011

41

Report of Independent Registered Public Accounting Firm

The Board of Trustees and Shareholders of Liberty Property Trust

We have audited the accompanying consolidated balance sheets of Liberty Property Trust (the “Trust”) as of December 31, 2010 and 2009, and the related consolidated statements of operations, equity, and cash flows for each of the three years in the period ended December 31, 2010. Our audits also included the financial statement schedule listed in the Index at Item 15. These financial statements and schedule are the responsibility of the Trust’s management. Our responsibility is to express an opinion on these financial statements and schedule based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly, in all material respects, the consolidated financial position of Liberty Property Trust at December 31, 2010 and 2009, and the consolidated results of its operations and its cash flows for each of the three years in the period ended December 31, 2010, in conformity with U.S. generally accepted accounting principles. Also, in our opinion, the related financial statement schedule, when considered in relation to the financial statements taken as a whole, presents fairly in all material respects the information set forth therein.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), Liberty Property Trust’s internal control over financial reporting as of December 31, 2010, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated February 25, 2011 expressed an unqualified opinion thereon.

/s/ Ernst & Young LLP

Philadelphia, Pennsylvania
February 25, 2011

42

CONSOLIDATED BALANCE SHEETS OF LIBERTY PROPERTY TRUST
(IN THOUSANDS, EXCEPT SHARE AND UNIT AMOUNTS)

	December 31,
	2010			2009
ASSETS
Real estate:
Land and land improvements	$	864,797		$	848,988
Building and improvements		4,420,662			4,283,250
Less accumulated depreciation		(1,090,685	)		(970,935	)
Operating real estate		4,194,774			4,161,303
Development in progress		—			66,714
Land held for development		209,253			218,633
Net real estate		4,404,027			4,446,650
Cash and cash equivalents		108,409			237,446
Restricted cash		49,526			42,232
Accounts receivable		6,898			6,057
Deferred rent receivable		108,933			95,527
Deferred financing and leasing costs, net		141,464			134,309
Investments in and advances to unconsolidated joint ventures		171,916			175,584
Assets held for sale		—			5,564
Prepaid expenses and other assets		71,660			85,574
Total assets	$	5,062,833		$	5,228,943
LIABILITIES
Mortgage loans	$	320,679		$	473,993
Unsecured notes		2,039,143			1,842,882
Credit facility		—			140,000
Accounts payable		23,652			31,195
Accrued interest		29,821			31,251
Dividend and distributions payable		56,149			55,402
Other liabilities		154,837			171,051
Total liabilities		2,624,281			2,745,774
EQUITY
Liberty Property Trust shareholders’ equity
Common shares of beneficial interest, $.001 par value, 183,987,000 shares authorized; 115,530,608 (includes 1,249,909 in treasury) and 113,875,211 (includes 1,249,909 in treasury) shares issued and outstanding as of December 31, 2010 and 2009, respectively		116			114
Additional paid-in capital		2,560,193			2,509,704
Accumulated other comprehensive (loss) income		(155	)		2,339
Distributions in excess of net income		(426,017	)		(337,911	)
Common shares in treasury, at cost, 1,249,909 shares as of December 31, 2010 and 2009		(51,951	)		(51,951	)
Total Liberty Property Trust shareholders’ equity		2,082,186			2,122,295
Noncontrolling interest — operating partnership
3,928,733 and 4,011,354 common units outstanding as of December 31, 2010 and 2009, respectively		67,621			72,294
9,740,000 preferred units outstanding as of December 31, 2010 and 2009		287,959			287,959
Noncontrolling interest — consolidated joint ventures		786			621
Total equity		2,438,552			2,483,169
Total liabilities and equity	$	5,062,833		$	5,228,943

See accompanying notes.

43

CONSOLIDATED STATEMENTS OF OPERATIONS OF LIBERTY PROPERTY TRUST
(IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)

	Year Ended December 31,
	2010			2009			2008
OPERATING REVENUE
Rental	$	522,263		$	516,538		$	503,611
Operating expense reimbursement		224,567			222,841			221,840
Total operating revenue		746,830			739,379			725,451
OPERATING EXPENSE
Rental property		155,294			148,392			147,479
Real estate taxes		85,139			85,968			83,047
General and administrative		52,850			51,237			54,462
Depreciation and amortization		173,402			169,818			168,148
Total operating expenses		466,685			455,415			453,136
Operating income		280,145			283,964			272,315
OTHER INCOME (EXPENSE)
Interest and other income		10,039			11,472			13,404
Debt extinguishment gain		—			1,547			2,521
Interest expense		(149,320	)		(148,902	)		(152,184	)
Total other income (expense)		(139,281	)		(135,883	)		(136,259	)
Income before property dispositions, income taxes, equity in earnings of unconsolidated joint ventures and impairment charges		140,864			148,081			136,056
Gain on property dispositions		4,616			1,687			10,572
Income taxes		(1,736	)		(494	)		(1,645	)
Equity in earnings of unconsolidated joint ventures		2,296			2,161			2,805
Impairment charges — investment in unconsolidated joint ventures and other		(378	)		(82,552	)		—
— goodwill		—			(15,700	)		—
Income from continuing operations		145,662			53,183			147,788
Discontinued operations (including net gain on property dispositions of $6,857, $17,859 and $23,519 for the years ended December 31, 2010, 2009 and 2008, respectively)		7,713			25,809			32,318
Net income		153,375			78,992			180,106
Noncontrolling interest-operating partnership		(25,448	)		(23,125	)		(27,681	)
Noncontrolling interest-consolidated joint ventures		(165	)		509			(483	)
Net income available to common shareholders	$	127,762		$	56,376		$	151,942
Earnings per share
Basic:
Income from continuing operations	$	1.06		$	0.29		$	1.29
Income from discontinued operations		0.07			0.23			0.33
Income per common share — basic	$	1.13		$	0.52		$	1.62
Diluted:
Income from continuing operations	$	1.05		$	0.29		$	1.29
Income from discontinued operations		0.07			0.23			0.33
Income per common share — diluted	$	1.12		$	0.52		$	1.62
Weighted average number of common shares outstanding
Basic		112,924			107,550			93,615
Diluted		113,606			108,002			93,804
Amounts attributable to common shareholders
Income from continuing operations	$	120,307		$	31,478		$	120,991
Discontinued operations		7,455			24,898			30,951
Net income available to common shareholders	$	127,762		$	56,376		$	151,942

See accompanying notes.

44

CONSOLIDATED STATEMENTS OF EQUITY OF LIBERTY PROPERTY TRUST
(IN THOUSANDS)

					Accumulated									Total			Noncontroll-			Noncontroll-			Noncontroll-
	Common				Other									Liberty			ing interest-			ing interest-			ing Interest-
	Shares of		Additional		Comprehensive			Distributions			Common			Property Trust			operating-			operating			consolidated
	Beneficial		Paid-In		(Loss)			in Excess of			Shares Held			Shareholders’			partnership-			partnership			joint
	Interest		Capital		Income			Net Income			in Treasury			Equity			Common			Preferred			ventures			Total Equity
Balance at January 1, 2008 (see note 8)	$	93	$	1,984,145	$	21,378		$	(116,640	)	$	(51,951	)	$	1,837,025		$	84,140		$	287,960		$	517		$	2,209,642
Net proceeds from the issuance of common shares		8		206,215		—			—			—			206,223			—			—			—			206,223
Net income		—		—		—			151,942			—			151,942			6,669			21,012			483			180,106
Contributions		—		—		—			—			—			—			176			—			—			176
Distributions		—		—		—			(221,023	)		—			(221,023	)		(10,131	)		(21,013	)		130			(252,037	)
Noncash compensation		—		9,152		—			—			—			9,152			—			—			—			9,152
Foreign currency translation adjustment		—		—		(26,756	)		—			—			(26,756	)		—			—			—			(26,756	)
Redemption of noncontrolling interests —common units		—		2,216		—			—			—			2,216			(2,216	)		—			—			—
		101		2,201,728		(5,378	)		(185,721	)		(51,951	)		1,958,779			78,638			287,959			1,130			2,326,506
Balance at December 31, 2008 (see note 8)
Net proceeds from the issuance of common shares		13		293,845		—			—			—			293,858			—			—			—			293,858
Net income		—		—		—			56,376			—			56,376			2,113			21,012			(509	)		78,992
Distributions		—		—		—			(208,566	)		—			(208,566	)		(7,513	)		(21,012	)		—			(237,091	)
Noncash compensation		—		12,905		—			—			—			12,905			—			—			—			12,905
Foreign currency translation adjustment		—		—		7,717			—			—			7,717			282			—			—			7,999
Redemption of noncontrolling interests — common units		—		1,226		—			—			—			1,226			(1,226	)		—			—			—
Balance at December 31, 2009		114		2,509,704		2,339			(337,911	)		(51,951	)		2,122,295			72,294			287,959			621			2,483,169
Net proceeds from the issuance of common shares		2		37,414		—			—			—			37,416			—			—			—			37,416
Net income		—		—		—			127,762			—			127,762			4,436			21,012			165			153,375
Distributions		—		—		—			(215,868	)		—			(215,868	)		(7,541	)		(21,012	)		—			(244,421	)
Noncash compensation		—		11,595		—			—			—			11,595			—			—			—			11,595
Foreign currency translation adjustment		—		—		(2,494	)		—			—			(2,494	)		(88	)		—			—			(2,582	)
Redemption of noncontrolling interests — common units		—		1,480		—			—			—			1,480			(1,480	)		—			—			—
Balance at December 31, 2010	$	116	$	2,560,193	$	(155	)	$	(426,017	)	$	(51,951	)	$	2,082,186		$	67,621		$	287,959		$	786		$	2,438,552

See accompanying notes.

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CONSOLIDATED STATEMENTS OF CASH FLOWS OF LIBERTY PROPERTY TRUST
(IN THOUSANDS)

	Year Ended December 31,
	2010			2009			2008
OPERATING ACTIVITIES
Net income	$	153,375		$	78,992		$	180,106
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		174,013			172,575			175,236
Amortization of deferred financing costs		6,339			5,101			4,429
Impairment charges — investment in unconsolidated joint ventures and other		957			104,156			3,076
Debt extinguishment gain		—			(1,547	)		(2,521	)
Equity in earnings of unconsolidated joint ventures		(2,296	)		(2,161	)		(2,805	)
Distributions from unconsolidated joint ventures		657			663			1,660
Gain on property dispositions		(12,052	)		(25,450	)		(37,167	)
Noncash compensation		11,595			12,905			9,152
Changes in operating assets and liabilities:
Restricted cash		(7,294	)		(1,189	)		(10,903	)
Accounts receivable		4,059			4,191			(264	)
Deferred rent receivable		(13,581	)		(13,414	)		(13,482	)
Prepaid expenses and other assets		(7,597	)		3,699			(35,189	)
Accounts payable		(7,399	)		(1,099	)		(10,913	)
Accrued interest		(1,430	)		(5,223	)		(3,251	)
Other liabilities		(389	)		(29,338	)		4,821
Net cash provided by operating activities		298,957			302,861			261,985
INVESTING ACTIVITIES
Investment in properties		(123,839	)		(58,871	)		(55,273	)
Investments in and advances to unconsolidated joint ventures		(1,870	)		(5,132	)		(8,410	)
Distributions from unconsolidated joint ventures		6,776			20,721			66,660
Net proceeds from disposition of properties/land		35,934			190,534			378,943
Net proceeds from (advances on) grant receivable/escrow		18,917			(23,238	)		9,875
Investment in development in progress		(9,265	)		(75,246	)		(253,835	)
Investment in land held for development		(6,086	)		(29,391	)		(47,906	)
Increase in deferred leasing costs		(30,721	)		(29,369	)		(33,537	)
Net cash (used in) provided by investing activities		(110,154	)		(9,992	)		56,517
FINANCING ACTIVITIES
Net proceeds from issuance of common shares		37,434			293,814			206,349
Proceeds from unsecured notes		366,000			—			—
Repayments of unsecured notes		(169,739	)		(287,179	)		(20,872	)
Proceeds from mortgage loans		743			330,250			2,667
Repayments of mortgage loans		(156,890	)		(54,864	)		(46,452	)
Proceeds from credit facility		338,500			199,150			572,300
Repayments on credit facility		(478,500	)		(319,150	)		(782,300	)
Increase in deferred financing costs		(9,697	)		(5,550	)		(33	)
Distributions paid on common shares		(215,083	)		(201,984	)		(231,325	)
Distributions paid on units		(28,610	)		(28,520	)		(31,648	)
Net cash used in financing activities		(315,842	)		(74,033	)		(331,314	)
(Decrease) increase in cash and cash equivalents		(127,039	)		218,836			(12,812	)
(Decrease) increase in cash and cash equivalents related to foreign currency translation		(1,998	)		2,816			(9,383	)
Cash and cash equivalents at beginning of year		237,446			15,794			37,989
Cash and cash equivalents at end of year	$	108,409		$	237,446		$	15,794

See accompanying notes.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS OF LIBERTY PROPERTY TRUST

1. ORGANIZATION

Liberty Property Trust (the “Trust”) is a self-administered and self-managed Maryland real estate investment trust (a “REIT”). Substantially all of the Trust’s assets are owned directly or indirectly, and substantially all of the Trust’s operations are conducted directly or indirectly, by its subsidiary, Liberty Property Limited Partnership, a Pennsylvania limited partnership (the “Operating Partnership” and, together with the Trust and their consolidated subsidiaries, the “Company”). The Trust is the sole general partner and also a limited partner of the Operating Partnership, owning 96.7% of the common equity of the Operating Partnership at December 31, 2010. The Company provides leasing, property management, development, acquisition, and other tenant-related services for a portfolio of industrial and office properties which are located principally within the Mid-Atlantic, Southeastern, Midwestern and Southwestern United States and the United Kingdom.

All square footage amounts are unaudited.

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Use of Estimates

The preparation of financial statements in conformity with U.S. generally accepted accounting principles (“US GAAP”) requires management to make estimates and assumptions that affect amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.

Principles of Consolidation

The consolidated financial statements of the Company include the Trust, the Operating Partnership and wholly owned subsidiaries and those subsidiaries in which the Company owns a majority voting interest with the ability to control operations of the subsidiaries and where no approval, veto or other important rights have been granted to the noncontrolling shareholders. All significant intercompany transactions and accounts have been eliminated.

Reclassifications

Certain amounts from prior years have been reclassified to conform to current-year presentation.

Real Estate and Depreciation

The properties are recorded at cost and are depreciated using the straight line method over their estimated useful lives. The estimated useful lives are as follows:

Building and improvements	40 years (blended)
Capital improvements	15 — 20 years
Equipment	5 — 10 years
Tenant improvements	Term of the related lease

Expenditures directly related to the acquisition or improvement of real estate, including interest and other costs capitalized during development, are included in net real estate and are stated at cost. The capitalized costs include pre-construction costs essential to the development of the property, development and construction costs, interest costs, real estate taxes, development-related salaries and other costs incurred during the period of development. In accordance with Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 805, “Business Combinations” (“ASC 805”), effective January 1, 2009, certain acquisition-related costs are expensed as incurred. Expenditures for maintenance and repairs are charged to operations as incurred.

In accordance with ASC 805, the Company allocates the purchase price of real estate acquired to land, building and improvements and intangibles based on the relative fair value of each component. The value ascribed to in-place leases is based on the rental rates for the existing leases compared to market rent for leases of similar terms and present valuing the difference based on market interest rates. Origination values are also assigned to in-place leases, and, where appropriate, value is assigned to customer relationships. The Company depreciates the amounts allocated to building and improvements over 40 years and the amounts allocated to intangibles relating to in-place leases, which are included in deferred financing and leasing costs and other liabilities in the accompanying consolidated balance sheets, over the remaining term of the related leases.

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Once a property is designated as held for sale, no further depreciation expense is recorded. Operations for properties identified as held for sale and/or sold where no continuing involvement exists are presented in discontinued operations for all periods presented.

The Company evaluates its real estate investments upon occurrence of a significant adverse change in its operations to assess whether any impairment indicators are present that affect the recovery of the recorded value. If any real estate investment is considered impaired, a loss is recognized to reduce the carrying value of the property to its estimated fair value.

Investments in Unconsolidated Joint Ventures

The Company accounts for its investments in unconsolidated joint ventures using the equity method of accounting as the Company exercises significant influence, but does not control these entities. Under the equity method of accounting, the net equity investment of the Company is reflected in the accompanying consolidated balance sheets and the Company’s share of net income from the joint ventures is included in the accompanying consolidated statements of operations.

On a periodic basis, management assesses whether there are any indicators that the value of the Company’s investments in unconsolidated joint ventures may be impaired. An investment is impaired only if management’s estimate of the value of the investment is less than the carrying value of the investment, and such decline in value is deemed to be other than temporary. To the extent impairment has occurred, the loss is measured as the excess of the carrying amount of the investment over the estimated fair value of the investment. The estimated fair value of the investments is determined using a discounted cash flow model which is a Level III valuation under FASB ASC 820, “Fair Value Measurements and Disclosures.” The Company considers a number of assumptions that are subject to economic and market uncertainties including, among others, demand for space, competition for tenants, changes in market rental rates, operating costs, capitalization rates, holding periods and discount rates. As these factors are difficult to predict and are subject to future events that may alter management’s assumptions, the values estimated by management in its impairment analyses may not be realized.

During the year ended December 31, 2009, the Company recognized impairment charges related to the decline in the fair values below the carrying values of certain of the Company’s investments in unconsolidated joint ventures. The Company considered the decline in fair value below the carrying value of $78.8 million to be other-than-temporary. The investment in unconsolidated joint ventures was impaired for the following segments as of December 31, 2009 (in thousands):

Segment	Impairment Amount
Midwest	$	6,963
Philadelphia/D.C.		64,060
United Kingdom		7,779
Total	$	78,802

No impairment losses on unconsolidated joint ventures were recognized during the years ended December 31, 2010 or 2008.

Cash and Cash Equivalents

Highly liquid investments with a maturity of three months or less when purchased are classified as cash equivalents.

Restricted Cash

Restricted cash includes tenant security deposits and escrow funds that the Company maintains pursuant to certain mortgage loans. Restricted cash also includes the undistributed proceeds from the sale of residential land in Kent County, United Kingdom.

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Accounts Receivable/Deferred Rent Receivable

The Company’s accounts receivable are comprised of rents and charges for property operating costs due from tenants. The Company’s deferred rent receivable represents the cumulative difference between rent revenue recognized on a straight line basis and contractual payments due under the terms of tenant leases. The Company periodically performs a detailed review of amounts due from tenants to determine if accounts receivable and deferred rent receivable balances are collectible. Based on this review, accounts receivable and deferred rent receivable are reduced by an allowance for doubtful accounts. The Company considers tenant credit quality and payment history and general economic conditions in determining the allowance for doubtful accounts. If the accounts receivable balance or the deferred rent receivable balance is subsequently deemed uncollectible, the receivable and allowance for doubtful account balance are written off.

A significant tenant has entered into a forbearance agreement with the Company. The forbearance agreement provides for the deferral of the tenant's monthly obligation of $467,000 for the period from December 1, 2010 through June 30, 2011. The Company has reviewed its situation with this tenant and based upon this review and the review of its other tenants, provisions are established, and an allowance for doubtful accounts for estimated losses resulting from the inability of its tenants to make required rental payments is maintained.

The allowance for doubtful accounts at December 31, 2010 and 2009 was $11.3 million and $11.1 million, respectively. The Company’s bad debt expense for the years ended December 31, 2010, 2009 and 2008 was $3.9 million, $4.3 million and $4.8 million, respectively.

Goodwill

Goodwill represents the amounts paid in excess of the fair value of the net assets acquired in connection with the acquisition of Republic Property Trust in October 2007. Pursuant to FASB ASC 350, “Intangible — Goodwill and Other” (“ASC 350”), goodwill is not amortized to expense but rather is analyzed for impairment. In conjunction with the purchase of Republic Property Trust, goodwill and other intangibles of $15.7 million were recorded. The goodwill was assigned to the Northern Virginia/Washington, D.C. operation (“reporting unit”) which is part of the Philadelphia/D.C. reportable segment and was included in prepaid expenses and other assets on the Company’s consolidated balance sheets. The Company assessed goodwill for impairment annually in November and in interim periods if certain events occurred indicating the carrying value may be impaired. The Company performed its analysis for potential impairment of goodwill in accordance with ASC 350, which requires that a two-step impairment test be performed on goodwill. In the first step, the fair value of the reporting unit is compared to its carrying value. The estimated fair value of the reporting unit is determined using a discounted cash flow model which considers a number of assumptions that are subject to economic and market uncertainties including, among others, demand for space, competition for tenants, changes in market rental rates, and operating costs. If the fair value exceeds its carrying value, goodwill is not impaired, and no further testing is required. If the carrying value of the reporting unit exceeds its fair value, then a second step must be performed in order to determine the implied fair value of the goodwill and compare it to the carrying value of the goodwill. If the carrying value of goodwill exceeds its implied fair value then an impairment loss is recorded equal to the difference. An impairment loss of $15.7 million was recognized during the year ended December 31, 2009 and there is no longer any goodwill in the Company’s consolidated balance sheets. No impairment loss related to goodwill was recognized during the year ended December 31, 2008.

Revenues

The Company earns rental income under operating leases with tenants. Rental income is recognized on a straight line basis over the applicable lease term. Operating expense reimbursements consisting of amounts due from tenants for real estate taxes, utilities and other recoverable costs are recognized as revenue in the period in which the corresponding expenses are incurred.

Termination fees (included in rental revenue) are fees that the Company has agreed to accept in consideration for permitting certain tenants to terminate their lease prior to the contractual expiration date. The Company recognizes termination fees in accordance with Securities and Exchange Commission Staff Accounting Bulletin 104, “Revenue Recognition,” when the following conditions are met:

a) the termination agreement is executed,

b) the termination fee is determinable,

c) all landlord services pursuant to the terminated lease have been rendered, and

d) collectability of the termination fee is assured.

Deferred Financing and Leasing Costs

Costs incurred in connection with financing or leasing are capitalized and amortized on a straight line basis over the term of the related loan or lease. Deferred financing cost amortization is reported as interest expense. Intangible assets related to acquired in-place leases are amortized over the terms of the related leases.

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Costs Incurred for Preferred Unit Issuance

Costs incurred in connection with the Company’s preferred unit issuances are reflected as a reduction of noncontrolling interest-preferred units.

Income per Common Share

The following table sets forth the computation of basic and diluted income per common share (in thousands, except per share amounts):

	2010						2009
			Weighted						Weighted
			Average						Average
	Income		Shares		Per		Income		Shares		Per
	(Numerator)		(Denominator)		Share		(Numerator)		(Denominator)		Share
Basic income from continuing operations
Income from continuing operations net of noncontrolling interest	$	120,307		112,924	$	1.06	$	31,478		107,550	$	0.29
Dilutive shares for long-term compensation plans		—		682				—		452
Diluted income from continuing operations
Income from continuing operations net of noncontrolling interest and assumed conversions		120,307		113,606	$	1.05		31,478		108,002	$	0.29
Basic income from discontinued operations
Discontinued operations net of noncontrolling interest		7,455		112,924	$	0.07		24,898		107,550	$	0.23
Dilutive shares for long-term compensation plans		—		682				—		452
Diluted income from discontinued operations
Discontinued operations net of noncontrolling interest		7,455		113,606	$	0.07		24,898		108,002	$	0.23
Basic income per common share
Net income available to common shareholders		127,762		112,924	$	1.13		56,376		107,550	$	0.52
Dilutive shares for long-term compensation plans		—		682				—		452
Diluted income per common share
Net income available to common shareholders and assumed conversions	$	127,762		113,606	$	1.12	$	56,376		108,002	$	0.52

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	2008
			Weighted
			Average
	Income		Shares		Per
	(Numerator)		(Denominator)		Share
Basic income from continuing operations
Income from continuing operations net of noncontrolling interest	$	120,991		93,615	$	1.29
Dilutive shares for long-term compensation plans		—		189
Diluted income from continuing operations
Income from continuing operations net of noncontrolling interest and assumed conversions		120,991		93,804	$	1.29
Basic income from discontinued operations
Discontinued operations net of noncontrolling interest		30,951		93,615	$	0.33
Dilutive shares for long-term compensation plans		—		189
Diluted income from discontinued operations
Discontinued operations net of noncontrolling interest		30,951		93,804	$	0.33
Basic income per common share
Net income available to common shareholders		151,942		93,615	$	1.62
Dilutive shares for long-term compensation plans		—		189
Diluted income per common share
Net income available to common shareholders and assumed conversions	$	151,942		93,804	$	1.62

Dilutive shares for long-term compensation plans represent the vested and unvested common shares outstanding during the year as well as the dilutive effect of outstanding options. The anti-dilutive options that were excluded from the computation of diluted income per common share in 2010, 2009 and 2008 were 1,433,000, 2,661,000 and 1,145,000, respectively.

During the year ended December 31, 2010, 315,000 common shares were issued upon the exercise of options.

During the year ended December 31, 2010, individuals acquired 83,000 common shares in exchange for the same number of common units. These individuals acquired these common units in connection with their contributions to the Operating Partnership of certain assets. The exchange of common shares for the common units is exempt from the registration requirement of the Securities Act of 1933, as amended, pursuant to Section 4(2) thereunder.

Fair Value of Financial Instruments

The carrying value of cash and cash equivalents, restricted cash, accounts receivable, accounts payable, accrued interest, dividends and distributions payable and other liabilities are reasonable estimates of fair values because of the short-term nature of these instruments. The fair value of the Company’s long-term debt, which is based on estimates by management and on rates quoted on December 31, 2010 for comparable loans, is greater than the aggregate carrying value by approximately $189.0 million at December 31, 2010.

Income Taxes

The Company has elected to be taxed as a REIT under Sections 856 through 860 of the Internal Revenue Code of 1986, as amended (the “Code”). As a result, the Company generally is not subject to federal income taxation at the corporate level to the extent it distributes annually at least 100% of its REIT taxable income, as defined in the Code, to its shareholders and satisfies certain other organizational and operational requirements. The Company has met these requirements and, accordingly, no provision has been made for federal income taxes in the accompanying consolidated financial statements. If the Company fails to qualify as a REIT in any taxable year, the Company will be subject to federal income tax on its taxable income at regular corporate rates (including any alternative minimum tax) and may not be able to qualify as a REIT for the four subsequent taxable years. Even as a REIT, the Company may be subject to certain state and local income and property taxes, and to federal income and excise taxes on undistributed taxable income.

Several of the Company’s subsidiaries are taxable REIT subsidiaries (each a “TRS”) and are subject to federal income taxes. In general, a TRS may perform additional services for tenants and generally may engage in real estate or non-real estate businesses that are not permitted REIT activities. The Company is also taxed in certain states, the United Kingdom, and Luxembourg. Accordingly, the Company has recognized federal, state and foreign income taxes in accordance with US GAAP, as applicable.

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There are no uncertain tax positions or possibly significant unrecognized tax benefits that are reasonably expected to occur within the next 12 months. The Company’s policy is to recognize interest accrued related to unrecognized benefits in interest expense and penalties in other expense. There are no interest or penalties deducted in the current period and no interest and penalties accrued at December 31, 2010 and December 31, 2009.

Certain of the Company’s taxable REIT subsidiaries have net operating loss carryforwards available of approximately $18.7 million. These carryforwards begin to expire in 2018. The Company has considered estimated future taxable income and has determined that a valuation allowance for the full carrying value of net operating loss carryforwards is appropriate.

The Company and its subsidiaries file income tax returns in the U.S. federal jurisdiction, certain state and local jurisdictions, the United Kingdom and Luxembourg. With few exceptions, the Company is no longer subject to U.S. federal, state, and local, or United Kingdom and Luxembourg examinations by tax authorities for years before 2007.

The Federal tax cost basis of the real estate at December 31, 2010 was $5.6 billion and at December 31, 2009 was $5.4 billion.

Share Based Compensation

Share-based compensation cost is measured at the grant date, based on the fair value of the award, and is recognized as expense over the employees’ requisite service period.

Foreign Currency Translation

The functional currency of the Company’s United Kingdom operations is pounds sterling. The Company translates the financial statements for the United Kingdom operations into US dollars. Gains and losses resulting from this translation do not impact the results of operations and are included in accumulated other comprehensive (loss) income as a separate component of Liberty Property Trust’s shareholders’ equity. A proportionate amount of gain or loss is allocated to noncontrolling interest-common units. Accumulated other comprehensive (loss) income consists solely of the foreign currency translation adjustments described above. Other comprehensive (loss) income was ($2.6) million, $8.0 million and ($26.8) million for the years ended December 31, 2010, 2009 and 2008, respectively. Upon sale or upon complete or substantially complete liquidation of the Company’s foreign investment, the gain or loss on the sale will include the cumulative translation adjustments that have been previously recorded in accumulated other comprehensive (loss) income and noncontrolling interest-common units.

Recently Issued Accounting Standards

Beginning in the first quarter of 2010, the Company is required to conduct an ongoing assessment to determine whether each entity in which it has an equity interest is a variable interest entity that should be consolidated if certain qualitative factors indicate that the Company has the controlling interest. This accounting change is required to be retroactively applied for all periods presented. The adoption of this requirement did not have a material impact on the Company’s financial statements.

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3. REAL ESTATE

The Company owns and operates industrial and office properties located principally in suburban mixed-use developments or business parks. The carrying value of these properties by type as of December 31, 2010 and 2009 is as follows (in thousands):

	Land		Buildings
	And Land		And				Accumulated
	Improvements		Improvements		Total		Depreciation
2010
Industrial properties	$	387,079	$	1,882,659	$	2,269,738	$	463,058
Office properties		477,718		2,538,003		3,015,721		627,627
2010 Total	$	864,797	$	4,420,662	$	5,285,459	$	1,090,685
2009
Industrial properties	$	375,630	$	1,841,359	$	2,216,989	$	417,694
Office properties		473,358		2,441,891		2,915,249		553,241
2009 Total	$	848,988	$	4,283,250	$	5,132,238	$	970,935

Depreciation expense was $147.3 million in 2010, $144.5 million in 2009 and $147.2 million in 2008.

Information on the operating properties the Company sold during the years ended December 31, 2010 and 2009 is as follows:

2010 Sales

	Number of		Leaseable
Segment	Buildings		Square Feet		Gross Proceeds
					(in thousands)
Northeast
Southeastern PA		2		63,925	$	5,987
Lehigh/Central PA		2		146,800		7,216
New Jersey		1		39,151		5,100
Midwest		1		26,660		523
Mid-Atlantic		1		220,000		3,190
South		3		181,791		7,000
Total		10		678,327	$	29,016

2009 Sales

	Number of		Leaseable
Segment	Buildings		Square Feet		Gross Proceeds
					(in thousands)
Northeast
Southeastern PA		8		595,712	$	43,920
New Jersey		5		379,529		37,564
Midwest		3		338,690		17,540
Mid-Atlantic		9		671,633		51,263
South		4		296,540		15,275
Total		29		2,282,104	$	165,562

4. INVESTMENTS IN UNCONSOLIDATED JOINT VENTURES

Listed below are the unconsolidated joint ventures in which the Company has a noncontrolling interest. The Company receives fees from these joint ventures for services it provides. These services include property management, leasing, development and administration. These fees are included in interest and other income in the accompanying consolidated statements of operations. The Company may also receive a promoted interest if certain return thresholds are met.

Liberty Venture I, LP

The Company has a 25% interest in Liberty Venture I, LP, an entity engaged in the ownership of industrial properties in New Jersey. This joint venture is part of the Company’s Northeast reportable segment.

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As of December 31, 2010, the joint venture owned 24 industrial properties totaling 3.3 million square feet and 43 acres of developable land.

The Company recognized $611,000, $682,000 and $765,000 in fees for services during the years ended December 31, 2010, 2009 and 2008, respectively.

Kings Hill Unit Trust

The Company has a 20% interest in Kings Hill Unit Trust, an entity engaged in the ownership of office and industrial properties in the County of Kent, United Kingdom. This joint venture is part of the Company’s United Kingdom reportable segment.

As of December 31, 2010, the joint venture owned 10 office properties and five industrial properties totaling 535,000 square feet.

The Company had a note receivable from Kings Hill Unit Trust for $4.3 million and $4.5 million as of December 31, 2010 and 2009, respectively. The note receivable bears interest at a 9% rate and is due in January 2016. This related party receivable is reflected in investments in and advances to unconsolidated joint ventures in the Company’s consolidated balance sheets.

The Company had a receivable from Kings Hill Unit Trust for $147,000 and $270,000 as of December 31, 2010 and 2009, respectively. This related party receivable is reflected in accounts receivable in the Company’s consolidated balance sheets.

Income from fees and interest was $465,000, $492,000 and $603,000 during the years ended December 31, 2010, 2009 and 2008, respectively.

Liberty Illinois, LP

The Company has a 25% interest in Liberty Illinois, LP, an entity primarily engaged in the ownership of industrial properties in Illinois. This joint venture is part of the Company’s Midwest reportable segment.

As of December 31, 2010, the joint venture owned 15 industrial properties totaling 5.1 million square feet and 342 acres of developable land.

The Company recognized $596,000, $890,000 and $1.2 million in fees for services during the years ended December 31, 2010, 2009 and 2008, respectively.

Blythe Valley JV Sarl

The Company has a 20% interest in Blythe Valley JV Sarl, an entity engaged in the ownership of office properties in the West Midlands, United Kingdom. This joint venture is part of the Company’s United Kingdom reportable segment.

As of December 31, 2010, the joint venture owned 13 office properties totaling 480,000 square feet and 98 acres of developable land.

The Company had a note receivable from Blythe Valley JV Sarl for $8.5 million and $6.9 million as of December 31, 2010 and 2009, respectively. The note receivable bears interest at a 10% rate and is due in December 2017. This related party receivable is reflected in investments in and advances to unconsolidated joint ventures in the Company’s consolidated balance sheets.

The Company had a receivable from Blythe Valley JV Sarl for $101,000 and $116,000 as of December 31, 2010 and 2009, respectively. This related party receivable is reflected accounts receivable in the Company’s consolidated balance sheets.

The Company recognized $316,000, $376,000 and $449,000 in fees for services during the years ended December 31, 2010, 2009 and 2008, respectively.

Liberty Washington, LP

The Company has a 25% interest in Liberty Washington, LP, an entity engaged in the ownership of office properties in Northern Virginia and Washington, D.C. This joint venture is part of the Company’s Philadelphia/D.C. reportable segment.

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As of December 31, 2010, the joint venture owned 25 office properties totaling 2.6 million square feet and six acres of developable land.

The Company had a payable to Liberty Washington, LP for $236,000 and $900,000 as of December 31, 2010 and 2009, respectively. This related party payable is reflected in investments in and advances to unconsolidated joint ventures in the Company’s consolidated balance sheets.

The Company had a receivable from Liberty Washington, LP for $2.0 million as of December 31, 2010. This related party receivable is reflected as a reduction of other liabilities in the Company’s consolidated balance sheet.

The Company recognized $4.0 million, $4.1 million and $5.6 million in interest and fees for services during the year ended December 31, 2010, 2009 and 2008, respectively.

Liberty/Commerz 1701 JFK Boulevard, LP

On April 13, 2006, the Company entered into a joint venture pursuant to which it sold an 80% interest in the equity of Comcast Center, a 1.25 million square foot office tower the Company was then developing in Philadelphia, Pennsylvania. The transaction valued the property at $512 million. Upon signing the joint venture agreement and through March 30, 2008, the criteria for sale recognition had not been met and the transaction was accounted for as a financing arrangement. This joint venture is part of the Company’s Philadelphia/D.C. reportable segment.

On March 31, 2008, a $324 million, ten-year secured permanent financing at a rate of 6.15% for Comcast Center was funded. The proceeds from this financing were used to pay down outstanding borrowings on the Company’s credit facility.

On March 31, 2008, all conditions for sale treatment were satisfied and the Company recognized the sale of Comcast Center to an unconsolidated joint venture. Profit on the transaction was deferred until the costs of the project could be reasonably estimated. Profit on the sale of $6.6 million was recognized in the fourth quarter of 2008.

The Company had a receivable from this joint venture for $2.6 million and $2.4 million as of December 31, 2010 and 2009, respectively. This related party receivable is due to the funding of joint venture development costs and is reflected in investments in and advances to unconsolidated joint ventures in the Company’s consolidated balance sheet.

The Company had a receivable from this joint venture for $420,000 and $252,000 as of December 31, 2010 and 2009, respectively. This related party receivable is reflected in accounts receivable in the Company’s consolidated balance sheets.

The Company recognized $2.0 million, $1.9 million and $883,000 in fees for services during the years ended December 31, 2010, 2009, and 2008 respectively.

Other Joint Ventures

As of December 31, 2010, the Company had a 50% ownership interest in three additional unconsolidated joint ventures. One of these joint ventures has four operating properties and an investment in land held for development and is part of the Company’s South reportable segment. One of these joint ventures has one operating property, an investment in land held for development and a leasehold interest and is part of the Company’s United Kingdom reportable segment. The other joint venture has a leasehold interest and does not operate or own operating properties and is part of the Company’s United Kingdom reportable segment. As of December 31, 2010, the Company had a $3.1 million note payable due to this joint venture. The note payable is interest free and is due upon written notice from the joint venture.

The Company’s share of each of the joint venture’s earnings is included in equity in earnings of unconsolidated joint ventures in the accompanying consolidated statements of operations.

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The condensed balance sheets as of December 31, 2010 and 2009 and statements of operations for Liberty Venture I, LP, Kings Hill Unit Trust, Liberty Illinois, LP, Blythe Valley JV Sarl, Liberty Washington, LP, Liberty Commerz 1701 JFK Boulevard, LP and other unconsolidated joint ventures for the years ended December 31, 2010, 2009 and 2008 are as follows (in thousands):

Condensed Balance Sheets:

	December 31, 2010
	Liberty									Blythe						Liberty Commerz
	Venture I,			Kings Hill			Liberty			Valley JV			Liberty			1701 JFK
	LP			Unit Trust			Illinois, LP			Sarl			Washington, LP			Boulevard, LP			Other			Total
Real estate assets	$	133,443		$	183,763		$	252,140		$	202,544		$	909,485		$	493,196		$	68,614		$	2,243,185
Accumulated depreciation		(23,764	)		(15,861	)		(24,436	)		(14,887	)		(71,513	)		(41,733	)		(3,786	)		(195,980	)
Real estate assets, net		109,679			167,902			227,704			187,657			837,972			451,463			64,828			2,047,205
Land held for development		2,741			—			42,698			36,897			2,000			—			21,848			106,184
Other assets		11,475			6,480			13,514			12,221			55,138			49,457			28,959			177,244
Total assets	$	123,895		$	174,382		$	283,916		$	236,775		$	895,110		$	500,920		$	115,635		$	2,330,633
Debt	$	75,801		$	140,859		$	140,400		$	192,132		$	347,990		$	324,000		$	53,996		$	1,275,178
Other liabilities		2,686			41,058			5,897			67,060			34,161			10,775			10,927			172,564
Equity		45,408			(7,535	)		137,619			(22,417	)		512,959			166,145			50,712			882,891
Total liabilities and equity	$	123,895		$	174,382		$	283,916		$	236,775		$	895,110		$	500,920		$	115,635		$	2,330,633
Company’s net investment in unconsolidated joint ventures (1)	$	10,600		$	3,286		$	21,959		$	2,298		$	74,345		$	34,355		$	25,073		$	171,916

	December 31, 2009
										Blythe			Liberty			Liberty Commerz 1701
	Liberty			Kings Hill			Liberty			Valley JV			Washington,			JFK Boulevard,
	Venture I, LP			Unit Trust			Illinois, LP			Sarl			LP			LP			Other			Total
Real estate assets	$	132,016		$	190,110		$	229,149		$	209,869		$	777,491		$	493,119		$	72,954		$	2,104,708
Accumulated depreciation		(19,689	)		(13,081	)		(18,409	)		(10,651	)		(50,090	)		(27,880	)		(2,204	)		(142,004	)
Real estate assets, net		112,327			177,029			210,740			199,218			727,401			465,239			70,750			1,962,704
Development in progress		—			—			21,800			—			111,830			—			—			133,630
Land held for development		2,735			—			42,723			48,013			2,000			—			22,083			117,554
Other assets		11,755			9,855			11,993			12,667			52,722			46,821			34,698			180,511
Total assets	$	126,817		$	186,884		$	287,256		$	259,898		$	893,953		$	512,060		$	127,531		$	2,394,399
Debt	$	76,765		$	153,549		$	151,270		$	199,370		$	347,046		$	324,000		$	54,935		$	1,306,935
Other liabilities		2,104			41,826			6,786			51,262			31,706			10,478			17,149			161,311
Equity		47,948			(8,491	)		129,200			9,266			515,201			177,582			55,447			926,153
Total liabilities and equity	$	126,817		$	186,884		$	287,256		$	259,898		$	893,953		$	512,060		$	127,531		$	2,394,399
Company’s net investment in unconsolidated joint ventures (1)	$	11,238		$	3,198		$	19,567		$	3,383		$	73,369		$	36,461		$	28,368		$	175,584

(1) Differences between the Company’s net investment in unconsolidated joint ventures and its underlying equity in the net assets of the venture is primarily a result of impairments related to the Company’s investment in unconsolidated joint ventures, the deferral of gains associated with the sales of properties to joint ventures in which the Company retains an ownership interest and loans made to the joint ventures by the Company. Differences between historical cost basis and the basis reflected at the joint venture level (other than loans) are typically depreciated over the life of the related asset.

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Condensed Statements of Operations:

	Year Ended December 31, 2010
																Liberty
	Liberty									Blythe			Liberty			Commerz 1701
	Venture I,			Kings Hill			Liberty			Valley JV			Washington,			JFK Boulevard,
	LP			Unit Trust			Illinois, LP			Sarl			LP			LP			Other			Total
Total revenue	$	17,089		$	15,980		$	20,160		$	13,270		$	72,824		$	61,444		$	7,276		$	208,043
Operating expense		7,352			2,471			7,782			3,401			25,614			21,417			1,271			69,308
		9,737			13,509			12,378			9,869			47,210			40,027			6,005			138,735
Interest		(5,879	)		(3,078	)		(7,966	)		(14,783	)		(20,486	)		(20,445	)		(3,485	)		(76,122	)
Depreciation and amortization		(5,099	)		(4,197	)		(7,051	)		(5,315	)		(29,132	)		(15,479	)		(1,979	)		(68,252	)
Other income/(expense)		11			(564	)		(48	)		(289	)		165			(781	)		20			(1,486	)
Net (loss) income	$	(1,230	)	$	5,670		$	(2,687	)	$	(10,518	)	$	(2,243	)	$	3,322		$	561		$	(7,125	)
Company’s equity in (loss) earnings of unconsolidated joint ventures	$	(107	)	$	1,317		$	(174	)	$	(1,980	)	$	1,624		$	1,157		$	459		$	2,296

	Year Ended December 31, 2009
																Liberty
	Liberty									Blythe			Liberty			Commerz 1701
	Venture I,			Kings Hill			Liberty			Valley JV			Washington,			JFK Boulevard,
	LP			Unit Trust			Illinois, LP			Sarl			LP			LP			Other			Total
Total revenue	$	18,407		$	16,197		$	22,191		$	13,325		$	74,850		$	61,094		$	4,928		$	210,992
Operating expense		6,559			2,649			8,350			6,120			26,159			21,170			2,435			73,442
		11,848			13,548			13,841			7,205			48,691			39,924			2,493			137,550
Interest		(4,992	)		(7,674	)		(7,469	)		(13,084	)		(17,086	)		(20,455	)		(2,915	)		(73,675	)
Depreciation and amortization		(4,255	)		(4,559	)		(7,117	)		(5,576	)		(30,727	)		(15,498	)		(1,594	)		(69,326	)
Other income/(expense)		131			(602	)		(50	)		(175	)		280			(378	)		156			(638	)
Impairment charges		—			—			—			—			(39,380	)		—			—			(39,380	)
Net income (loss)	$	2,732		$	713		$	(795	)	$	(11,630	)	$	(38,222	)	$	3,593		$	(1,860	)	$	(45,469	)
Company’s equity in earnings (loss) of unconsolidated joint ventures	$	905		$	334		$	181		$	(1,318	)	$	1,649		$	1,241		$	(831	)	$	2,161

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	Year Ended December 31, 2008
																Liberty
	Liberty									Blythe			Liberty			Commerz 1701
	Venture I,			Kings Hill			Liberty			Valley JV			Washington,			JFK Boulevard,
	LP			Unit Trust			Illinois, LP			Sarl			LP			LP			Other			Total
Total revenue	$	19,075		$	18,057		$	22,811		$	15,386		$	76,552		$	43,607		$	3,056		$	198,544
Operating expense		7,074			2,490			7,003			2,377			24,440			15,080			709			59,173
		12,001			15,567			15,808			13,009			52,112			28,527			2,347			139,371
Interest		(4,522	)		(9,900	)		(7,833	)		(14,253	)		(17,670	)		(15,454	)		(2,057	)		(71,689	)
Depreciation and amortization		(4,162	)		(5,272	)		(7,378	)		(5,911	)		(34,951	)		(10,941	)		(862	)		(69,477	)
Other income/(expense)		2,473			(924	)		195			(467	)		722			191			(96	)		2,094
Gain on sale		(3	)		—			—			—			—			—			102			99
Net income (loss)	$	5,787		$	(529	)	$	792		$	(7,622	)	$	213		$	2,323		$	(566	)	$	398
Company’s equity in earnings (loss) of unconsolidated joint ventures	$	1,645		$	167		$	549		$	(1,370	)	$	1,288		$	685		$	(159	)	$	2,805

5. DEFERRED FINANCING AND LEASING COSTS

Deferred financing and leasing costs at December 31, 2010 and 2009 are as follows (in thousands):

	December 31,
	2010			2009
Deferred leasing costs	$	194,290		$	174,693
Deferred financing costs		42,190			40,952
In-place lease value and related intangible asset		26,778			27,054
		263,258			242,699
Accumulated amortization		(121,794	)		(108,390	)
Total	$	141,464		$	134,309

6. INDEBTEDNESS

Overview

Indebtedness consists of mortgage loans, unsecured notes, and borrowings under a credit facility. The weighted average interest rates for the years ended December 31, 2010, 2009 and 2008, were 6.2%, 6.2% and 6.1%, respectively. Interest costs during the years ended December 31, 2010, 2009 and 2008 in the amount of $929,000, $7.6 million and $20.0 million, respectively, were capitalized. Cash paid for interest for the years ended December 31, 2010, 2009 and 2008, was $145.8 million, $159.7 million and $177.0 million, respectively.

The Company is subject to financial covenants contained in some of its debt agreements, the most restrictive of which are detailed below under the heading “Credit Facility.” As of December 31, 2010, the Company was in compliance with all financial covenants.

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The scheduled principal amortization and maturities of the Company’s mortgage loans, unsecured notes outstanding and the Credit Facility (as defined below) and the related weighted average interest rates at December 31, 2010 are as follows (in thousands, except percentages):

												Weighted
	Mortgages											Average
	Principal		Principal			Unsecured		Credit				Interest
	Amortization		Maturities			Notes		Facility		Total		Rate
2011	$	6,207	$	—		$	246,500	$	—	$	252,707		7.22	%
2012		5,070		53,629	(1)		230,100		—		288,799		6.27	%
2013		4,582		4,510			—		—		9,092		5.73	%
2014		4,965		2,684			200,000		—		207,649		5.66	%
2015		4,511		44,469			316,000		—		364,980		5.17	%
2016		3,068		182,318			300,000		—		485,386		6.10	%
2017		2,317		2,349			296,543		—		301,209		6.61	%
2018		—		—			100,000		—		100,000		7.50	%
2019		—		—			—		—		—		0.00	%
2020		—		—			350,000		—		350,000		4.75	%
	$	30,720	$	289,959		$	2,039,143	$	—	$	2,359,822		5.98	%

(1) There are two one-year extensions for $23,512 of mortgages.

Mortgage Loans, Unsecured Notes

Mortgage loans with maturities ranging from 2012 to 2017 are collateralized by and in some instances cross-collateralized by properties with a net book value of $547.9 million.

The interest rates on $2,319.7 million of mortgage loans and unsecured notes are fixed and range from 4.5% to 8.8%. The weighted average remaining term for the mortgage loans and unsecured notes is 5.0 years.

Credit Facility

During 2010, the Company obtained a new $500 million unsecured revolving credit facility (the “Credit Facility”) due November 2013, replacing a $600 million unsecured revolving credit facility (the “$600 million Credit Facility”) due January 2011. Based on the Company’s present ratings, borrowings under the Credit Facility are priced at LIBOR plus 230 basis points. The Credit Facility contains a competitive bid option, whereby participating lenders bid on the interest rate to be charged. This feature is available for up to 50% of the amount of the facility. There is also a 45 basis point annual facility fee on the current borrowing capacity. The Credit Facility contains financial covenants, certain of which are set forth below:

• total debt to total assets may not exceed 0.60:1;

• earnings before interest, taxes, depreciation and amortization to fixed charges may not be less than 1.50:1;

• unsecured debt to unencumbered asset value must equal or be less than 60%;

• unencumbered net operating income to unsecured interest expense must equal or exceed 200% and

• adjusted net operating income from all unencumbered properties to unsecured indebtedness must be greater than 12%.

Additionally, the Company has entered into an agreement to fund its planned improvements for the Kings Hill land development project. At December 31, 2010, the Company had not drawn any funds from a £7 million revolving credit facility. The facility expires on November 22, 2011.

Activity

In April 2010, the Company used available cash and proceeds from its $600 million Credit Facility to repay $119.3 million principal value of mortgage loans. The weighted average interest rate of these loans as of March 31, 2010 was 7.3%. The Company incurred a $1.2 million prepayment penalty and wrote off $936,000 in deferred financing costs in conjunction with the prepayment of these loans. These costs are included as interest expense in the accompanying statements of operations.

In August 2010, the Company used proceeds from its $600 million Credit Facility to repay $169.7 million principal value of 8.50% senior notes due August 2010.

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In August 2010, the Company replaced its existing $600 million Credit Facility which was due in January 2011 with the Credit Facility. The Credit Facility is for $500 million. It matures in November 2013. Based upon the Company’s current credit ratings, borrowings under the new facility bear interest at LIBOR plus 230 basis points.

In September 2010, the Company issued $350 million of ten-year, 4.75% senior notes. The net proceeds from this issuance were used to repay borrowings under the Company’s Credit Facility and for general corporate purposes.

During the year ended December 31, 2009, the Company satisfied a 7.75% senior note due April 2009 in full by paying $238.6 million in outstanding principal amount and satisfied an 8.125% medium term unsecured note due January 2009 in full by paying $20.0 million in outstanding principal amount.

During the year ended December 31, 2009, the Company purchased $11.4 million of its 7.75% senior notes due April 2009, $6.9 million of its 8.50% senior notes due August 2010, $3.5 million of its 7.25% senior notes due March 2011, $4.9 million of its 6.375% senior notes due August 2012 and $3.5 million of its 6.625% senior notes due October 2017. These notes were purchased at a $1.5 million aggregate discount. The discount is included in net income as a debt extinguishment gain.

During the year ended December 31, 2009, the Company closed on mortgages totaling $330.3 million bearing interest at an average rate of 7.1%. The net proceeds of these mortgages were used to pay down outstanding borrowings under the $600 million Credit Facility and for general corporate purposes.

During the year ended December 31, 2008, the Company purchased $23.4 million of its 8.50% senior notes due August 2010. These notes were purchased at a $2.5 million discount. The discount is included in net income as a debt extinguishment gain.

7. LEASING ACTIVITY

Future minimum rental payments due from tenants under noncancelable operating leases as of December 31, 2010 are as follows (in thousands):

2011	$	494,328
2012		446,437
2013		389,111
2014		321,221
2015		256,225
Thereafter		817,299
TOTAL	$	2,724,621

In addition to minimum rental payments, most leases require the tenants to pay for their pro rata share of specified operating expenses. These payments are included as operating expense reimbursement in the accompanying consolidated statements of operations.

8. SHAREHOLDERS’ EQUITY

Common Shares

The Company paid to holders of its common shares and holders of its common units distributions of $222.6 million, $209.6 million and $241.8 million during the years ended December 31, 2010, 2009 and 2008, respectively. On a per share basis, the Company paid Common Share and Unit distributions of $1.90, $1.90 and $2.50 during the years ended December 31, 2010, 2009 and 2008, respectively.

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The following table summarizes the taxability of common share distributions (taxability for 2010 is estimated):

	2010		2009		2008
Ordinary dividend	$	1.4812	$	1.6772	$	2.0186
Qualified dividend		—		—		0.3422
Capital gain — 15%		—		0.0976		0.0664
IRC Sec 1250 unrecapture gain — 25%		0.0128		0.1252		0.0728
Return of capital		0.4060		—		—
Total	$	1.9000	$	1.9000	$	2.500

The Company’s tax return for the year ended December 31, 2010 has not been filed. The taxability information presented for the 2010 distributions is based upon the best available data. The Company’s prior federal income tax returns are subject to examination by taxing authorities. Because the application of tax laws and regulations is susceptible to varying interpretations, the taxability of distributions could be changed at a later date upon final determination by taxing authorities.

Common Shares Held in Treasury

The Company has a share repurchase plan under which the Company may purchase up to $100 million of the Company’s common shares and preferred shares (as defined below).

The Company purchased no common shares under the share repurchase plan during 2010, 2009 or 2008.

Common Units

The common units outstanding as of December 31, 2010 have the same economic characteristics as common shares of the Trust. The common units share proportionately in the net income or loss and in any distributions of the Operating Partnership. The common units of the Operating Partnership not held by the Trust are redeemable at any time at the option of the holder. The Trust as the sole general partner of the Operating Partnership may at its option elect to settle the redemption in cash or through the exchange on a one—for-one basis with unregistered common shares of the Trust. The market value of the 3,928,733 common units of the Operating Partnership not held by the Trust based on the closing price of the shares of the Company at December 31, 2010 was $125.4 million.

No common units were issued in connection with acquisitions during 2010, 2009 or 2008. A reclassification from noncontrolling interests — common units to additional paid in capital was made reflecting the effect of the cumulative redemption of common units to common shares in the amount of $38.9 million and $36.7 million at December 31, 2008 and 2007, respectively.

Preferred Units

The Company has outstanding the following Cumulative Redeemable Preferred Units of the Operating Partnership, (the “Preferred Units”):

Date of						Liquidation		Dividend			Redeemable
Issue	Issue	Amount		Units		Preference		Rate			As of	Exchangeable after
		(in 000’s)
7/28/99	Series B	$	95,000		3,800	$	25		7.45	%	8/31/09	8/31/13 into Series B Cumulative Redeemable Preferred Shares of the Trust
6/16/05	Series E	$	20,000		400	$	50		7.00	%	6/16/10	6/16/15 into Series E Cumulative Redeemable Preferred Shares of the Trust
6/30/05	Series F	$	50,000		1,000	$	50		6.65	%	6/30/10	12/12/15 into Series F Cumulative Redeemable Preferred Shares of the Trust
12/15/06	Series G	$	27,000		540	$	50		6.70	%	12/15/11	12/15/16 into Series G Cumulative Redeemable Preferred Shares of the Trust
8/21/07	Series H	$	100,000		4,000	$	25		7.40	%	8/21/12	8/21/17 into Series H Cumulative Redeemable Preferred Shares of the Trust

The Preferred Units are callable at the Operating Partnership’s option after a stated period of time. The Trust as the sole general partner of the Operating Partnership may at its option elect to settle the redemption for cash or through the exchange on a one-for-one basis with unregistered preferred shares of the Trust.

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The Company paid the following Preferred Unit distributions for the year ended December 31:

	2010		2009		2008
Distributions (in millions)	$	21.0	$	21.0	$	21.0
Distribution per unit:
Series B	$	1.86	$	1.86	$	1.86
Series E	$	3.50	$	3.50	$	3.50
Series F	$	3.33	$	3.33	$	3.33
Series G	$	3.35	$	3.35	$	3.35
Series H	$	1.85	$	1.85	$	1.85

As of December 31, 2010, the Company had 6,273,000 authorized but unissued preferred shares.

Dividend Reinvestment and Share Purchase Plan

The Company has a Dividend Reinvestment and Share Purchase Plan under which holders of common shares may elect to automatically reinvest their distributions in additional common shares and may make optional cash payments for additional common shares. The Company may issue additional common shares or repurchase common shares in the open market for purposes of satisfying its obligations under the Dividend Reinvestment and Share Purchase Plan. During the years ended December 31, 2010, 2009, and 2008, 915,363, 304,587, and 1,328,376 common shares, respectively, were issued through the Dividend Reinvestment and Share Purchase Plan. The Company used the proceeds to pay down outstanding borrowings under the Company’s unsecured credit facility and for general corporate purposes.

Continuous Equity Offering

During the years ended December 31, 2009 and 2008, the Company sold common shares pursuant to a continuous offering program. During the years ended December 31, 2009 and 2008, the Company sold 12.8 million and 495,000 common shares, respectively, through this program. The net proceeds from the offering of $283.2 million and $10.8 million for the years ended December 31, 2009 and 2008, respectively, were used for general corporate purposes, including the funding of maturing senior note obligations. The Company did not sell any common shares pursuant to a continuous offering program during 2010.

Sale of Common Shares

In October 2008, the Company sold 4,750,000 common shares. The net proceeds of the offering of $149.5 million were used to pay down outstanding borrowings under the $600 million Credit Facility and for general corporate purposes.

9. EMPLOYEE BENEFIT PLANS

The Company maintains a 401(k) plan for the benefit of its full-time employees. The Company matches the employees’ contributions up to 3% of the employees’ salary and may also make annual discretionary contributions. Total 401(k) expense recognized by the Company was $788,000, $802,000 and $1.4 million for the years ended December 31, 2010, 2009 and 2008, respectively.

10. SHARE BASED COMPENSATION

2008 Plan

In March 2008, the Compensation Committee of the Board of Trustees (the “Board”) adopted a 2008 Long-Term Incentive Plan (the “2008 Plan”) which is applicable to the Company’s executive officers. Pursuant to the 2008 Plan grants of stock options and restricted stock units were made.

Options

The Company has authorized the grant of options under the share-based employee compensation plan (the “Plan”) and the 2008 Plan to executive officers, other key employees, non-employee trustees and consultants of up to 21.1 million common shares of the Company. All options granted have 10-year terms and most options vest and are expensed over a three-year period, with options to purchase up to 20% of the shares exercisable after the first anniversary, up to 50% after the second anniversary and 100% after the third anniversary of the date of grant.

Share based compensation cost related to options for the years ended December 31, 2010, 2009 and 2008 was $2.0 million, $1.5 million and $1.0 million, respectively.

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The fair value of share option awards is estimated on the date of the grant using the Black-Scholes option valuation model. The following weighted-average assumptions were utilized in calculating the fair value of options granted during the periods indicated:

	Year Ended December 31,
	2010			2009			2008
Risk-free interest rate		2.3	%		1.6	%		2.7	%
Dividend yield		7.6	%		8.5	%		7.0	%
Historical volatility factor		0.357			0.325			0.221
Weighted-average expected life	5 years			5 years			5 years

A summary of the Company’s share option activity, and related information for the year ended December 31, 2010 follows:

				Weighted
				Average
	Options			Exercise
	(000s)			Price
Outstanding at January 1, 2010		3,184		$	32.61
Granted		462			32.54
Exercised		(314	)		28.06
Forfeited		(9	)		22.69
Outstanding at December 31, 2010		3,323		$	33.06
Exercisable at December 31, 2010		2,066		$	35.87

The weighted average fair value of options granted during the years ended December 31, 2010, 2009 and 2008 was $5.00, $2.30 and $2.64, respectively. Exercise prices for options outstanding as of December 31, 2010 ranged from $20.32 to $49.74. The weighted average remaining contractual life of the options outstanding and exercisable at December 31, 2010 was 5.6 years and 4.1 years, respectively.

During the years ended December 31, 2010, 2009 and 2008, the total intrinsic value of share options exercised (the difference between the market price at exercise and the price paid by the individual to exercise the option) was $1.4 million, $1.7 million and $2.6 million, respectively. As of December 31, 2010, 1.0 million of the options outstanding and exercisable had an exercise price higher than the closing price of the Company’s common shares and are considered to have no intrinsic value at that date. As of December 31, 2010, 1.1 million options outstanding and exercisable had an exercise price lower than the closing price of the Company’s common shares. The aggregate intrinsic value of these options was $2.5 million at that date. The total cash received from the exercise of options for the years ended December 31, 2010, 2009 and 2008 was $8.5 million, $4.3 million and $6.5 million, respectively. The Company has historically issued new shares to satisfy share option exercises.

As of December 31, 2010, there was $1.4 million of unrecognized compensation costs related to nonvested options granted under the Plan. That cost is expected to be recognized over a weighted average period of 1.0 years.

Long Term Incentive Shares (“LTI”)

Restricted LTI share grants made under the Plan are valued at the grant date fair value, which is the market price of the underlying common shares, and vest ratably over a five-year period beginning with the first anniversary of the grant.

During 2010, 2009 and 2008, the Company granted Restricted Stock Units to the executive officers pursuant to the 2008 Plan. A portion of the Restricted Stock Unit will vest from 50% to 200% at the end of three years based on whether our total return exceeds the average total returns of a selected group of peer companies (“First Portion”). The grant date fair value of the First Portion was calculated based on a Monte Carlo simulation model and was determined to be 141%, 175% and 163% as of December 2010, 2009 and 2008, respectively, of the market value of a common share as of the grant date and is amortized over the respective three-year period subject to certain accelerated vesting due to the age and years of service of certain executive officers. Another portion of the Restricted Stock Unit will vest from 50% to 200% at the end of three years based on the amount of the Company’s Funds from operations (“Second Portion”). Targets are established for each of the three years in the relevant award period. Depending on how each year’s performance compares to the projected performance for that year, the Restricted Stock Units are deemed earned and will be payable to the executive officer at the end of the award period. The fair value of Second Portion is based on the market value of a common share as of the grant date and is being amortized to expense during the period from grant date to the vesting dates, adjusting for the expected level of vesting that is anticipated to occur at those dates also subject to certain accelerated vesting provisions as described above.

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Share-based compensation cost related to restricted LTI share grants for the years ended December 31, 2010, 2009 and 2008 were $6.6 million, $8.1 million and $4.4 million, respectively.

The following table shows a summary of the Company’s restricted LTI share activity for the year ended December 31, 2010:

				Weighted Avg.
	Shares			Grant Date
	(000s)			Fair value
Nonvested at January 1, 2010		596		$	27.94
Granted		259			32.65
Vested		(124	)		31.35
Forfeited		(2	)		26.96
Nonvested at December 31, 2010		729		$	29.03

The weighted average fair value of restricted shares granted during the years ended December 31, 2010, 2009 and 2008 was $32.65 per share, $20.52 per share and $31.04 per share. As of December 31, 2010, there was $9.5 million of total unrecognized compensation cost related to nonvested shares granted under the Plan. That cost is expected to be recognized over a weighted average period of 1.4 years. The total fair value of restricted shares vested during the years ended December 31, 2010, 2009 and 2008 was $3.9 million, $4.4 million and $3.5 million, respectively.

Bonus Shares

The Plan provides that employees of the Company may elect to receive bonuses or commissions in the form of common shares in lieu of cash (“Bonus Shares”). By making such election, the employee receives shares equal to 120% of the cash value of the bonus or commission, less applicable withholding tax. Bonus Shares issued for the years ended December 31, 2010, 2009 and 2008 were 60,238, 80,187 and 83,015, respectively. Share-based compensation cost related to Bonus Shares for the years ended December 31, 2010, 2009 and 2008 was $2.0 million, $1.7 million and $2.6 million, respectively.

Profit Sharing Plan

The Plan provides that employees of the Company, below the officer level, may receive up to 5% of base pay in the form of common shares depending on Company performance. Shares issued in conjunction with the profit sharing plan for the years ended December 31, 2010, 2009 and 2008 were 17,769, 23,849 and 15,517 shares, respectively. Share-based compensation cost related to the profit sharing plan for the years ended December 31, 2010, 2009 and 2008 was $387,000, $582,000 and $568,000, respectively.

An additional 8,365,493, 9,142,276 and 1,751,912 common shares were reserved for issuance for future grants under the Plan at December 31, 2010, 2009 and 2008, respectively.

Employee Share Purchase Plan

The Company registered 750,000 common shares under the Securities Act of 1933, as amended, in connection with an employee share purchase plan (“ESPP”). The ESPP enables eligible employees to purchase shares of the Company, in amounts up to 10% of the employee’s salary, at a 15% discount to fair market value. There were 19,043, 19,137 and 17,618 shares issued, in accordance with the ESPP, during the years ended December 31, 2010, 2009 and 2008, respectively. Share-based compensation cost related to the ESPP for the years ended December 31, 2010, 2009 and 2008 was $78,000, $131,000 and $85,000, respectively.

11. COMMITMENTS AND CONTINGENCIES

Environmental Matters

Substantially all of the Properties and land were subject to Phase I Environmental Assessments and when appropriate Phase II Environmental Assessments (collectively, the “Environmental Assessments”) obtained in contemplation of their acquisition by the Company. The Environmental Assessments consisted of, among other activities, a visual inspection of each Property and its neighborhood and a check of pertinent public records. The Environmental Assessments did not reveal, nor is the Company aware of, any non-compliance with environmental laws, environmental liability or other environmental claim that the Company believes would likely have a material adverse effect on the Company.

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Operating Ground Lease Agreements

Future minimum rental payments under the terms of all non-cancelable operating ground leases under which the Company is the lessee, as of December 31, 2010, are as follows (in thousands):

Year	Amount
2011	$	290
2012		294
2013		297
2014		294
2015		291
2016 through 2070		10,285
Total	$	11,751

Operating ground lease expense incurred by the Company during the years ended December 31, 2010, 2009 and 2008 amounted to $434,000, $460,000 and $486,000, respectively.

Legal Matters

As noted in previous filings, as a result of the Company’s acquisition of Republic Property Trust in October, 2007 the Company was substituted as a party to certain ongoing litigation (the “Republic Litigation”). The Republic Litigation has been settled, and the settlement has not had, and will not have, a material impact on the Company's financial position and results of operations for any period.

From time to time, the Company is a party to a variety of legal proceedings, claims and assessments arising in the normal course of business. The Company regularly assesses the liabilities and contingencies in connection with these matters based on the latest available information. For those matters where it is probable that the Company has incurred or will incur a loss and the loss or range of loss can be reasonably estimated, the estimated loss is accrued and charged to income in the Company’s consolidated financial statements. In other cases, because of the uncertainties related to both the probable outcome and amount or range of potential loss, a reasonable estimate of liability, if any, cannot be made. The Company has reviewed the liabilities and contingencies in connection with these matters. As of December 31, 2010, the Company believes that there are no legal proceedings, claims or assessments that are expected to have a material adverse effect on the Company’s business or financial statements.

Other

The Company is obligated to make additional capital contributions to unconsolidated joint ventures of $4.1 million. The Company has not guaranteed any of the principal balance of the debt of the unconsolidated joint ventures.

The Company has guaranteed the interest payments under its mortgage loan for its unconsolidated joint venture Blythe Valley JV Sarl for a maximum of $2.1 million.

The Company has letter of credit obligations of $934,000 related to development requirements. The Company believes that it is remote that there will be a draw upon these letter of credit obligations.

The Company is obligated to pay for tenant improvements not yet completed for a maximum of $35.7 million.

The Company maintains cash and cash equivalents at financial institutions. The combined account balances at each institution typically exceed FDIC insurance coverage and, as a result, there is a concentration of credit risk related to amounts on deposit in excess of FDIC insurance coverage. The Company believes the risk is not significant.

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12. QUARTERLY RESULTS OF OPERATIONS (UNAUDITED)

A summary of quarterly results of operations for the years ended December 31, 2010 and 2009 follows. Certain amounts have been reclassified to conform to the current presentation of discontinued operations (in thousands, except per share amounts).

	Quarter Ended
	Dec. 31,		Sept. 30,		June 30,		Mar. 31,		Dec. 31,			Sept. 30,		June 30,		Mar. 31,
	2010		2010		2010		2010		2009			2009		2009		2009
Operating revenue	$	185,892	$	188,521	$	184,274	$	188,143	$	186,339		$	186,069	$	182,798	$	184,173
Income from continuing operations		35,213		40,226		37,389		32,834		(57,866	)		40,318		38,338		32,393
Discontinued operations		1,320		780		2,625		2,988		9,060			10,426		4,874		1,449
Net income		36,533		41,006		40,014		35,822		(48,806	)		50,744		43,212		33,842
Income per common share — basic (1)		0.27		0.31		0.30		0.26		(0.46	)		0.39		0.35		0.28
Income per common share — diluted (1)		0.26		0.30		0.29		0.26		(0.46	)		0.39		0.35		0.28

(1) The sum of quarterly financial data may vary from the annual data due to rounding.

13. SEGMENT INFORMATION

The Company operates its portfolio of properties primarily throughout the Mid-Atlantic, Southeastern, Midwestern and Southwestern United States. Additionally, the Company owns certain assets in the United Kingdom. The Company reviews the performance of the portfolio on a geographical basis. As such, the following regions are considered the Company’s reportable segments:

Reportable Segments	Markets
Northeast	Southeastern PA; Lehigh/Central PA; New Jersey
Midwest	Minnesota; Milwaukee; Chicago
Mid-Atlantic	Maryland; Carolinas; Richmond; Virginia Beach
South	Jacksonville; Orlando; Boca Raton; Tampa; Texas; Arizona
Philadelphia/D.C.	Philadelphia; Northern Virginia/Washington, D.C.
United Kingdom	County of Kent; West Midlands

The Company’s reportable segments are distinct business units which are each managed separately in order to concentrate market knowledge within a geographic area. Within these reportable segments, the Company derives its revenues from its two product types: industrial properties and office properties.

The Company evaluates performance of the reportable segments based on property level operating income, which is calculated as rental revenue and operating expense reimbursement less rental property expenses and real estate taxes. The accounting policies of the reportable segments are the same as those for the Company on a consolidated basis.

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The operating information by segment is as follows (in thousands):

YEAR ENDED DECEMBER 31, 2010

	Northeast
			Lehigh/										phila-
	Southeastern		Central		New								delphia /		united
	PA		PA		Jersey		Midwest		mid-atlantic		South		D.C.		kingdom		total
Operating revenue	$	181,048	$	103,651	$	31,957	$	78,294	$	134,778	$	184,280	$	28,611	$	4,211	$	746,830
Rental property expenses and real estate taxes		59,476		26,620		13,624		30,658		41,745		60,315		7,063		932		240,433
Property level operating income	$	121,572	$	77,031	$	18,333	$	47,636	$	93,033	$	123,965	$	21,548	$	3,279		506,397
Interest and other income																		10,039
Interest expense																		(149,320	)
General and administrative																		(52,850	)
Depreciation and amortization																		(173,402	)
Income before property dispositions, income taxes, equity in earnings of unconsolidated joint ventures and impairment charges																		140,864
Gain on property dispositions																		4,616
Income taxes																		(1,736	)
Equity in earnings of unconsolidated joint ventures																		2,296
Impairment charges — investment in unconsolidated joint ventures and other																		(378	)
Discontinued operations																		7,713
Net income																	$	153,375

YEAR ENDED DECEMBER 31, 2009

	Northeast												phila-
	Southeastern		Lehigh/		New								delphia /		united
	PA		Central PA		Jersey		Midwest		mid-atlantic		South		D.C.		kingdom		total
Operating revenue	$	183,057	$	99,046	$	30,436	$	82,816	$	136,308	$	181,252	$	22,061	$	4,403	$	739,379
Rental property expenses and real estate taxes		58,979		26,807		12,309		31,631		40,245		58,241		5,213		935		234,360
Property level operating income	$	124,078	$	72,239	$	18,127	$	51,185	$	96,063	$	123,011	$	16,848	$	3,468		505,019
Interest and other income																		11,472
Debt extinguishment gain																		1,547
Interest expense																		(148,902	)
General and administrative																		(51,237	)
Depreciation and amortization																		(169,818	)
Income before property dispositions, income taxes and equity in earnings of unconsolidated joint ventures and impairment charges																		148,081
Gain on property dispositions																		1,687
Income taxes																		(494	)
Equity in earnings of unconsolidated joint ventures																		2,161
Impairment charges — investment in unconsolidated joint ventures and other																		(82,552	)
— goodwill																		(15,700	)
Discontinued operations																		25,809
Net income																	$	78,992

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YEAR ENDED DECEMBER 31, 2008

	Northeast												phila-
	Southeastern		Lehigh/		New								delphia /		united
	PA		Central PA		Jersey		Midwest		mid-atlantic		South		D.C.		kingdom		total
Operating revenue	$	175,362	$	94,176	$	31,851	$	81,513	$	139,175	$	169,610	$	29,425	$	4,339	$	725,451
Rental property expenses and real estate taxes		56,810		25,320		12,443		29,817		40,885		56,416		7,791		1,044		230,526
Property level operating income	$	118,552	$	68,856	$	19,408	$	51,696	$	98,290	$	113,194	$	21,634	$	3,295		494,925
Interest and other income																		13,404
Debt extinguishment gain																		2,521
Interest expense																		(152,184	)
General and administrative																		(54,462	)
Depreciation and amortization																		(168,148	)
Income before property dispositions, income taxes and equity in earnings of unconsolidated joint ventures																		136,056
Gain on property dispositions																		10,572
Income taxes																		(1,645	)
Equity in earnings of unconsolidated joint ventures																		2,805
Discontinued operations																		32,318
Net income																	$	180,106

REAL ESTATE RELATED REVENUES BY TYPE

	Northeast												phila-
Year ended	Southeastern		Lehigh/		New				mid-				delphia /		united
December 31, 2010	PA		Central PA		Jersey		Midwest		atlantic		South		D.C.		kingdom		total
Industrial	$	30,177	$	91,692	$	9,566	$	30,258	$	53,963	$	77,113	$	7,588	$	1,263	$	301,620
Office		150,871		11,959		22,391		48,036		80,815		107,167		21,023		2,948		445,210
Total	$	181,048	$	103,651	$	31,957	$	78,294	$	134,778	$	184,280	$	28,611	$	4,211	$	746,830

	Northeast												phila-
Year ended	Southeastern		Lehigh/		New				mid-				delphia /		united
December 31, 2009	PA		Central PA		Jersey		Midwest		atlantic		South		D.C.		kingdom		total
Industrial	$	31,285	$	86,399	$	9,665	$	34,730	$	52,662	$	78,052	$	3,472	$	1,294	$	297,559
Office		151,772		12,647		20,771		48,086		83,646		103,200		18,589		3,109		441,820
Total	$	183,057	$	99,046	$	30,436	$	82,816	$	136,308	$	181,252	$	22,061	$	4,403	$	739,379

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	Northeast												phila-
Year ended	Southeastern		Lehigh/		New				mid-				delphia /		united
December 31, 2008	PA		Central PA		Jersey		Midwest		atlantic		South		D.C.		kingdom		total
Industrial	$	32,164	$	81,242	$	9,745	$	33,981	$	51,768	$	75,419	$	2,232	$	1,486	$	288,037
Office		143,198		12,934		22,106		47,532		87,407		94,191		27,193		2,853		437,414
Total	$	175,362	$	94,176	$	31,851	$	81,513	$	139,175	$	169,610	$	29,425	$	4,339	$	725,451

ROLLFORWARD OF OPERATING REAL ESTATE ASSETS BY REPORTABLE SEGMENT

	Northeast																		Phila-			United
	Southeastern			Lehigh/															Delphia /			Kingdom
	PA			Central PA			New Jersey			Midwest			Mid-Atlantic			South			D.C.			(1)			Total
January 1, 2010	$	1,079,790		$	808,776		$	165,426		$	531,234		$	1,010,119		$	1,347,742		$	146,650		$	42,501		$	5,132,238
Additions		15,941			26,367			5,121			9,354			24,956			93,701			22,722			(1,482	)		196,680
Dispositions		(11,324	)		(3,487	)		(5,125	)		(2,670	)		(9,217	)		(11,415	)		(221	)		—			(43,459	)
December 31, 2010	$	1,084,407		$	831,656		$	165,422		$	537,918		$	1,025,858		$	1,430,028		$	169,151		$	41,019			5,285,459
Accumulated depreciation																										(1,090,685	)
Land held for development																										209,253
Other assets																										658,806
Total assets at December 31, 2010																									$	5,062,833

	Northeast																		phila-			United
	Southeastern			Lehigh/															Delphia /			Kingdom
	PA			Central PA			New Jersey			Midwest			Mid-Atlantic			South			D.C.			(1)		Total
January 1, 2009	$	1,072,652		$	714,514		$	179,614		$	529,439		$	966,730		$	1,265,379		$	110,380		$	38,413	$	4,877,121
Additions		10,976			99,233			3,754			11,440			63,173			96,330			36,299			4,088		325,293
Dispositions		(3,838	)		(4,971	)		(17,942	)		(9,645	)		(19,784	)		(13,967	)		(29	)		—		(70,176	)
December 31, 2009	$	1,079,790		$	808,776		$	165,426		$	531,234		$	1,010,119		$	1,347,742		$	146,650		$	42,501		5,132,238
Accumulated depreciation																									(970,935	)
Development in progress																									66,714
Land held for development																									218,633
Assets held for sale																									5,564
Other assets																									776,729
Total assets at December 31, 2009																								$	5,228,943

(1) United Kingdom additions are impacted by foreign currency translation gain or loss.

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14. ACCOUNTING FOR THE IMPAIRMENT OR DISPOSAL OF LONG-LIVED ASSETS

Discontinued Operations

The operating results and gain/(loss) on disposition of real estate for properties sold and held for sale are reflected in the consolidated statements of operations as discontinued operations. Prior year financial statements have been adjusted for discontinued operations. The proceeds from dispositions of operating properties with no continuing involvement were $29.0 million, $165.6 million and $80.0 million for the years ended December 31, 2010, 2009 and 2008, respectively.

Below is a summary of the results of operations of the properties disposed of through the respective disposition dates (in thousands):

	Year Ended December 31,
	2010			2009			2008
Revenues	$	3,283		$	20,400		$	36,468
Operating expenses		(1,446	)		(6,130	)		(13,873	)
Interest expense		(384	)		(2,862	)		(5,694	)
Depreciation and amortization		(597	)		(3,458	)		(8,102	)
Income before property dispositions and impairment charges	$	856		$	7,950		$	8,799

Interest expense is allocated to discontinued operations. The allocation of interest expense to discontinued operations was based on the ratio of net assets sold (without continuing involvement) to the sum of total net assets plus consolidated debt.

Asset Impairment

During the years ended December 31, 2010, 2009 and 2008, the Company recognized impairment losses of $957,000, $9.5 million (Excludes $94.5 million impairment charges recognized in 2009 related to investments in unconsolidated joint ventures and goodwill. See Note 2.) and $3.1 million, respectively. The impairment losses are for operating properties or land parcels and were in the segments and for the amounts as indicated below (amounts in thousands):

	Year Ended December 31,
Segment	2010			2009		2008
Northeast	$	(52	)(1)	$	1,251	$	957
Midwest		511			837		1,490
Mid-Atlantic		(239	)(1)		3,992		629
South		360			292		—
Philadelphia/D.C.		377			3,137		—
Total	$	957		$	9,509	$	3,076

(1) Represents recovery of estimated sales costs on properties sold.

Impairment losses of $327,000 were recognized in the fourth quarter of 2010.

For the year ended December 31, 2010, $579,000 in impairments related to properties sold were included in the caption discontinued operations in the Company’s consolidated statement of operations and $378,000 in impairments were included in the caption impairment charges — investment in unconsolidated joint ventures and other in the Company’s consolidated statement of operations. For the year ended December 31, 2009, $5.8 million in impairments related to properties sold were included in the caption discontinued operations in the Company’s consolidated statement of operations and $3.7 million in impairment was included in the caption impairment charges — investment in unconsolidated joint ventures and other in the Company’s consolidated statement of operations. For the year ended December 31, 2008, $3.1 million in impairment related to properties sold was included in the caption discontinued operations in the Company’s statement of operations. The Company determined these impairments through a comparison of the aggregate future cash flows (including quoted offer prices) to be generated by the properties to the carrying value of the properties. The Company has evaluated each of the properties and land held for development and has determined that there are no additional valuation adjustments necessary at December 31, 2010.

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15. SUPPLEMENTAL DISCLOSURE TO STATEMENTS OF CASH FLOWS

The following are supplemental disclosures to the consolidated statements of cash flows for the years ended December 31, 2010, 2009 and 2008 (amounts in thousands):

	2010		2009		2008
Write-off of fully depreciated property and deferred costs	$	48,373	$	76,714	$	31,421
Assumption of mortgage loans		2,833		—		—
Increase in investment in unconsolidated joint ventures		—		—		(35,172	)
Disposition of properties/development in progress		—		—		173,624
Disposition of deferred financing and leasing costs		—		—		12,526
Decrease in accounts receivable		—		—		7,854
Decrease in deferred rent receivable		—		—		6,580
Decrease in prepaid and other assets		—		—		38,486
Decrease in credit facility		—		—		(152,960	)
Decrease in other liabilities		—		—		(50,938	)

16. SUBSEQUENT EVENTS

Subsequent to December 31, 2010, the Company started the development, on a speculative basis, of two industrial-flex buildings and it signed leases (one of which is subject to certain approvals) committing it to the development of two 100% leased office buildings. The industrial-flex buildings are expected to contain a total of 103,000 square feet of leasable space and represent an anticipated investment of $15 million. The office buildings are expected to contain a total of 360,000 square feet of leasable space and represent an anticipated investment of $130 million.

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LIBERTY PROPERTY TRUST
REAL ESTATE AND ACCUMULATED DEPRECIATION
AS OF DECEMBER 31, 2010

								Costs
								Capitalized										Date of
								Subsequent		Gross Amount Carried at End of Period						Accumulated		Construction	Depreciable
				Initial Cost				to		Land and		Building and		Total		Depreciation		or	life
Project	Location	Encumbrances		Land		Building		Acquisition		Improvements		Improvements		12/31/2010		12/31/10		Acquisition	(years)
OPERATING PROPERTIES
1501 Perryman Road	Aberdeen, MD	$	—	$	5,813,324	$	18,874,059	$	4,470,131	$	5,816,839	$	23,340,674	$	29,157,514	$	2,506,553	2005	40 yrs.
2196 Avenue C	Allentown, PA		—		101,159		—		1,354,683		107,307		1,348,535		1,455,842		877,850	1980	40 yrs.
2202 Hanger Place	Allentown, PA		—		137,439		—		1,331,299		138,127		1,330,610		1,468,738		932,036	1981	40 yrs.
7437 Industrial Boulevard	Allentown, PA		—		717,488		5,022,413		2,864,910		726,651		7,878,160		8,604,810		3,526,473	1976	40 yrs.
7339 Industrial Boulevard	Allentown, PA		—		1,187,776		—		6,722,946		1,197,447		6,713,275		7,910,723		2,468,308	1996	40 yrs.
400 Nestle Way	Allentown, PA		18,970,828		8,065,500		—		27,420,765		8,184,096		27,302,169		35,486,265		10,636,515	1997	40 yrs.
7248 Industrial Boulevard	Allentown, PA		—		2,670,849		13,307,408		3,905,038		2,670,673		17,212,622		19,883,295		5,465,956	1988	40 yrs.
700 Nestle Way	Allentown, PA		*		3,473,120		—		20,069,956		4,174,970		19,368,105		23,543,076		6,840,477	1998	40 yrs.
7562 Penn Drive	Allentown, PA		—		269,614		844,069		168,845		269,614		1,012,914		1,282,528		338,583	1989	40 yrs.
7277 Williams Avenue	Allentown, PA		—		462,964		1,449,009		261,433		463,123		1,710,283		2,173,406		593,898	1989	40 yrs.
7355 Williams Avenue	Allentown, PA		—		489,749		1,658,091		305,327		489,749		1,963,418		2,453,167		680,356	1998	40 yrs.
794 Roble Road	Allentown, PA		—		1,147,541		6,088,041		1,183,790		1,147,541		7,271,832		8,419,373		2,769,825	1985	40 yrs.
8014 Industrial Boulevard	Allentown, PA		*		4,019,258		—		9,764,666		3,645,117		10,138,806		13,783,924		3,604,517	1999	40 yrs.
705 Boulder Drive	Allentown, PA		*		10,594,027		—		27,314,822		10,596,767		27,312,082		37,908,849		4,358,201	2001	40 yrs.
651 Boulder Drive	Allentown, PA		—		4,308,646		—		17,823,342		4,308,646		17,823,342		22,131,987		4,509,238	2000	40 yrs.
8150 Industrial Boulevard	Allentown, PA		—		2,564,167				8,583,521		2,571,466		8,576,222		11,147,688		2,094,455	2002	40 yrs.
8250 Industrial Boulevard	Allentown, PA		*		1,025,667				5,339,264		1,035,854		5,329,076		6,364,931		1,261,154	2002	40 yrs.
650 Boulder Drive	Allentown, PA		*		5,208,248				31,373,290		9,961,788		26,619,750		36,581,539		5,431,788	2002	40 yrs.
7165 Ambassador Drive	Allentown, PA		*		792,999		—		4,533,868		804,848		4,522,019		5,326,867		1,160,038	2002	40 yrs.
200 Boulder Drive	Allentown, PA		—		4,722,683		18,922,645		439,944		4,722,683		19,362,589		24,085,272		3,051,609	2004	40 yrs.
250 Boulder Drive	Allentown, PA		—		3,599,936		12,099,145		2,338,593		3,717,733		14,319,942		18,037,675		2,408,923	2004	40 yrs.
8400 Industrial Boulevard	Allentown, PA		—		6,725,948		—		27,128,012		7,521,211		26,332,749		33,853,961		3,025,564	2005	40 yrs.
6560 Stonegate Drive	Allentown, PA		—		458,281		—		2,805,110		458,945		2,804,447		3,263,391		1,544,292	1989	40 yrs.
6370 Hedgewood Drive	Allentown, PA		—		540,795		—		3,195,210		541,459		3,194,547		3,736,005		1,551,623	1990	40 yrs.
6390 Hedgewood Drive	Allentown, PA		—		707,203		—		2,650,618		707,867		2,649,954		3,357,821		1,389,177	1990	40 yrs.
6350 Hedgewood Drive	Allentown, PA		*		360,027		—		3,989,956		560,691		3,789,292		4,349,983		1,745,243	1989	40 yrs.
6330 Hedgewood Drive	Allentown, PA		—		531,268		—		4,731,901		532,047		4,731,122		5,263,169		2,699,255	1988	40 yrs.
6580 Snowdrift Road	Allentown, PA		—		388,328		—		3,388,842		389,081		3,388,089		3,777,170		1,855,845	1988	40 yrs.
6540 Stonegate Drive	Allentown, PA		—		422,042		—		3,909,892		422,730		3,909,205		4,331,934		2,236,361	1988	40 yrs.
974 Marcon Boulevard	Allentown, PA		—		143,500		—		2,251,823		144,248		2,251,075		2,395,323		1,280,943	1987	40 yrs.
964 Marcon Boulevard	Allentown, PA		—		138,816		—		1,851,766		139,480		1,851,102		1,990,582		1,077,744	1985	40 yrs.
764 Roble Road	Allentown, PA		—		141,069		—		876,165		141,746		875,488		1,017,234		537,148	1985	40 yrs.
3174 Airport Road	Allentown, PA		—		98,986		—		1,310,686		98,986		1,310,686		1,409,672		771,080	1979	40 yrs.
2201 Hanger Place	Allentown, PA		—		128,454		—		1,918,272		129,142		1,917,583		2,046,726		1,383,382	1987	40 yrs.
954 Marcon Boulevard	Allentown, PA		—		103,665		—		1,346,983		104,453		1,346,196		1,450,648		731,272	1981	40 yrs.
754 Roble Road	Allentown, PA		—		162,115		1,731,885		410,146		163,735		2,140,411		2,304,146		951,499	1986	40 yrs.
944 Marcon Boulevard	Allentown, PA		—		118,521		1,435,479		518,471		119,711		1,952,760		2,072,471		799,236	1986	40 yrs.
6520 Stonegate Drive	Allentown, PA		—		453,315		—		1,673,590		484,361		1,642,544		2,126,905		711,038	1996	40 yrs.
2041 Avenue C	Allentown, PA		—		213,599		1,095,217		357,991		213,879		1,452,928		1,666,807		496,534	1990	40 yrs.
7620 Cetronia Road	Allentown, PA		—		1,091,806		3,851,456		228,320		1,093,724		4,077,858		5,171,582		1,566,110	1990	40 yrs.
180,190 Cochrane Drive	Annapolis, MD		—		3,670,256		—		22,959,664		3,752,293		22,877,627		26,629,920		11,262,597	1988	40 yrs.
4606 Richlynn Drive	Belcamp, MD		—		299,600		1,818,861		712,787		299,600		2,531,649		2,831,249		724,193	1985	40 yrs.
1455 Valley Center Parkway	Bethlehem, PA		—		670,290		—		3,230,418		545,172		3,355,536		3,900,708		1,206,845	1997	40 yrs.
1640 Valley Center Parkway	Bethlehem, PA		—		359,000		—		3,882,696		190,728		4,050,968		4,241,696		1,369,909	1996	40 yrs.
1650 Valley Center Parkway	Bethlehem, PA		—		359,000		—		1,974,113		188,896		2,144,217		2,333,113		805,475	1997	40 yrs.
1660 Valley Center Parkway	Bethlehem, PA		—		359,000		—		2,378,710		188,721		2,548,988		2,737,710		868,984	1998	40 yrs.
83 South Commerce Way	Bethlehem, PA		—		143,661		888,128		406,994		212,744		1,226,039		1,438,783		487,499	1989	40 yrs.
85 South Commerce Way	Bethlehem, PA		—		236,708		987,949		178,233		237,078		1,165,813		1,402,890		416,529	1989	40 yrs.
87 South Commerce Way	Bethlehem, PA		—		253,886		1,062,881		244,820		253,886		1,307,701		1,561,587		509,901	1989	40 yrs.
89 South Commerce Way	Bethlehem, PA		—		320,000		—		1,819,815		367,706		1,772,109		2,139,815		715,996	1998	40 yrs.
1525 Valley Center Parkway	Bethlehem, PA		—		475,686		—		8,447,080		804,104		8,118,662		8,922,766		2,225,827	1999	40 yrs.
74 West Broad Street	Bethlehem, PA		—		1,096,127				14,010,142		1,099,079		14,007,191		15,106,269		4,337,979	2002	40 yrs.
1605 Valley Center Parkway	Bethlehem, PA		—		729,751				11,450,461		1,766,196		10,414,016		12,180,212		3,067,269	2000	40 yrs.
1495 Valley Center Parkway	Bethlehem, PA		—		434,640		—		5,061,217		435,303		5,060,554		5,495,857		2,536,011	1990	40 yrs.
1550 Valley Center Parkway	Bethlehem, PA		—		196,954		—		4,234,073		197,700		4,233,327		4,431,027		2,047,359	1988	40 yrs.
1560 Valley Center Parkway	Bethlehem, PA		—		240,069		—		4,596,781		240,732		4,596,118		4,836,850		2,513,686	1988	40 yrs.
1510 Valley Center Parkway	Bethlehem, PA		—		312,209		—		3,744,301		312,873		3,743,636		4,056,510		1,990,833	1988	40 yrs.
1530 Valley Center Parkway	Bethlehem, PA		—		211,747		—		3,002,234		212,492		3,001,489		3,213,981		1,625,362	1988	40 yrs.
57 South Commerce Way	Bethlehem, PA		—		390,839		2,701,161		645,206		395,459		3,341,747		3,737,206		1,470,232	1986	40 yrs.
6601-6625 W. 78th Street	Bloomington, MN		—		2,263,060		—		39,300,906		2,310,246		39,253,720		41,563,966		12,053,222	1998	40 yrs.
6161 Green Valley Drive	Bloomington, MN		—		740,378		3,311,602		1,545,672		709,961		4,887,690		5,597,651		1,196,645	1992	40 yrs.
10801 Nesbitt Avenue South	Bloomington, MN		—		784,577				3,538,021		786,382		3,536,216		4,322,598		934,358	2001	40 yrs.
5775 West Old Shakopee Road	Bloomington, MN		—		2,052,018		3,849,649		1,657,571		2,060,644		5,498,593		7,559,238		1,485,015	2002	40 yrs.
5715 Old Shakopee Road West	Bloomington, MN		—		1,263,226		2,360,782		2,021,057		1,264,758		4,380,307		5,645,065		921,844	2002	40 yrs.
5735 Old Shakopee Road West	Bloomington, MN		—		1,263,226		2,360,782		1,027,173		1,264,758		3,386,423		4,651,181		811,901	2002	40 yrs.
5705 Old Shakopee Road	Bloomington, MN		—		2,113,223		—		5,520,730		2,148,571		5,485,383		7,633,953		817,941	2001	40 yrs.
1701 Clint Moore Boulevard	Boca Raton, FL		—		1,430,884		3,043,553		1,370,725		1,430,937		4,414,225		5,845,162		1,454,028	1985	40 yrs.
951 Broken Sound Parkway	Boca Raton, FL		—		1,426,251		6,098,952		1,788,361		1,426,251		7,887,313		9,313,564		2,702,850	1986	40 yrs.
777 Yamato Road	Boca Raton, FL		—		4,101,247		16,077,347		5,703,158		4,501,247		21,380,506		25,881,752		6,878,070	1987	40 yrs.
1801 Clint Moore Road	Boca Raton, FL		—		1,065,068		4,481,644		261,265		1,065,068		4,742,909		5,807,977		1,513,549	1986	40 yrs.
750 Park of Commerce Boulevard	Boca Raton, FL		—		2,430,000		—		21,130,343		2,473,406		21,086,937		23,560,343		814,808	2007	40 yrs.
400 Boulder Drive	Breinigsville, PA		—		—				13,408,721		2,865,575		10,543,146		13,408,721		1,685,899	2003	40 yrs.
860 Nestle Way	Breinigsville, PA		—		8,118,881		18,885,486		7,247,724		8,118,881		26,133,210		34,252,091		3,771,051	2004	40 yrs.

72

LIBERTY PROPERTY TRUST
REAL ESTATE AND ACCUMULATED DEPRECIATION
AS OF DECEMBER 31, 2010

								Costs
								Capitalized											Date of
								Subsequent		Gross Amount Carried at End of Period						Accumulated			Construction	Depreciable
				Initial Cost				to		Land and		Building and		Total		Depreciation			or	life
Project	Location	Encumbrances		Land		Building		Acquisition		Improvements		Improvements		12/31/2010		12/31/10			Acquisition	(years)
OPERATING PROPERTIES
8201 Industrial Boulevard	Breinigsville, PA		*		2,089,719		—		8,328,910		2,222,168		8,196,461		10,418,629		937,164		2006	40 yrs.
8500 Industrial Bouldvard	Breinigsville, PA		—		8,752,708		—		39,837,821		11,511,499		37,079,030		48,590,529		2,150,385		2007	40 yrs.
602 Heron Drive	Bridgeport, NJ		—		524,728		2,240,478		7,650		524,728		2,248,128		2,772,856		715,965		1996	40 yrs.
245 Executive Drive	Brookfield, WI		—		577,067		5,197,903		3,893,747		577,067		9,091,650		9,668,717		2,867,338		1984	40 yrs.
15800 West Bluemound Road	Brookfield, WI		—		1,289,204		8,128,035		1,578,366		1,306,811		9,688,794		10,995,605		2,308,621		1994	40 yrs.
20700 Swenson Drive	Brookfield, WI		4,625,546		830,008		12,276,445		781,307		830,999		13,056,761		13,887,759		1,936,272		2005	40 yrs.
20800 Swenson Drive	Brookfield, WI		3,994,886		1,023,466		10,754,207		1,006,557		1,025,082		11,759,147		12,784,229		1,893,532		2005	40 yrs.
20935 Swenson Drive	Brookfield, WI		3,442,913		571,389		10,242,091		747,638		572,158		10,988,960		11,561,118		1,762,943		2005	40 yrs.
20975 Swenson Drive	Brookfield, WI		4,485,150		675,422		8,947,430		1,169,451		678,637		10,113,666		10,792,303		1,837,207		2005	40 yrs.
20825 Swenson Drive	Brookfield, WI		—		644,563		3,578,596		326,963		646,518		3,903,605		4,550,122		567,573		2006	40 yrs.
1485 W. Commerce Avenue	Carlisle, PA		—		4,249,868		13,886,039		2,241,825		4,095,262		16,282,471		20,377,733		2,728,243		2004	40 yrs.
3773 Corporate Parkway	Center Valley, PA		—		738,108				7,113,377		794,874		7,056,611		7,851,485		1,887,538		2001	40 yrs.
95 Kriner Road	Chambersburg, PA		—		8,695,501		—		29,151,481		9,407,871		28,439,111		37,846,982		1,565,316		2006	40 yrs.
12810 Virkler Drive	Charlotte, NC		—		475,368		2,367,586		54,921		475,368		2,422,507		2,897,874		—		2010	40 yrs.
1309 Executive Boulevard	Cheaspeake, VA		—		926,125				5,098,066		955,374		5,068,817		6,024,191		1,247,356		2001	40 yrs.
1305 Executive Boulevard	Chesapeake, VA		—		861,020				4,720,263		1,129,850		4,451,432		5,581,282		981,750		2002	40 yrs.
1313 Executive Boulevard	Chesapeake, VA		—		1,180,036				4,629,615		1,708,050		4,101,602		5,809,652		998,791		2002	40 yrs.
500 Independence Parkway	Chesapeake, VA		—		864,150		4,427,285		443,733		866,609		4,868,559		5,735,168		798,187		2004	40 yrs.
700 Independence Parkway	Chesapeake, VA		6,174,904		1,950,375		7,236,994		535,346		1,951,135		7,771,580		9,722,715		1,662,280		2004	40 yrs.
501 Independence Parkway	Chesapeake, VA		—		1,202,556		5,975,538		1,327,494		1,292,273		7,213,315		8,505,588		1,104,650		2005	40 yrs.
505 Independence Parkway	Chesapeake, VA		—		1,292,062		6,456,515		1,276,589		1,292,254		7,732,911		9,025,165		1,267,010		2005	40 yrs.
510 Independence Parkway	Chesapeake, VA		—		2,012,149		7,546,882		966,737		2,014,689		8,511,079		10,525,768		1,414,566		2005	40 yrs.
1301 Executive Boulevard	Chesapeake, VA		—		—		—		6,188,658		997,570		5,191,088		6,188,658		714,193		2005	40 yrs.
676 Independence Parkway	Chesapeake, VA		—		1,527,303		—		10,407,802		1,562,903		10,372,202		11,935,105		375,890		2006	40 yrs.
6230 Old Dobbin Lane	Colombia, MD		—		3,004,075		—		7,861,770		2,746,455		8,119,390		10,865,845		1,389,396		2004	40 yrs.
9101,9111,9115 Guilford Road	Columbia, MD		—		758,951		—		4,384,691		765,952		4,377,690		5,143,642		2,390,462		1984	40 yrs.
9125,9135,9145 Guilford Road	Columbia, MD		—		900,154		—		5,765,879		920,439		5,745,594		6,666,033		3,551,308		1983	40 yrs.
7178-80 Columbia Gateway	Columbia, MD		—		1,569,237		4,786,887		1,557,193		1,571,105		6,342,212		7,913,317		3,034,765		1987	40 yrs.
9770 Patuxent Woods Drive	Columbia, MD		—		341,663		3,033,309		1,876,157		341,663		4,909,466		5,251,129		1,668,493		1986	40 yrs.
9780 Patuxent Woods Drive	Columbia, MD		—		218,542		1,940,636		669,179		218,542		2,609,815		2,828,356		856,165		1986	40 yrs.
9790 Patuxent Woods Drive	Columbia, MD		—		243,791		2,164,094		360,288		243,791		2,524,382		2,768,173		841,490		1986	40 yrs.
9810 Patuxent Woods Drive	Columbia, MD		—		266,684		2,366,901		909,725		266,684		3,276,626		3,543,310		1,022,270		1986	40 yrs.
9800 Patuxent Woods Drive	Columbia, MD		—		299,099		2,654,069		693,028		299,099		3,347,097		3,646,197		1,085,979		1988	40 yrs.
9820 Patuxent Woods Drive	Columbia, MD		—		237,779		2,110,835		953,352		237,779		3,064,187		3,301,966		975,651		1988	40 yrs.
9830 Patuxent Woods Drive	Columbia, MD		—		296,262		2,628,933		582,878		296,262		3,211,811		3,508,073		1,075,810		1986	40 yrs.
8945-8975 Guilford Road	Columbia, MD		—		2,428,795		7,493,740		2,143,378		2,427,065		9,638,848		12,065,913		3,071,202		1986	40 yrs.
6250 Old Dobbin Lane	Columbia, MD		—		958,105				3,617,338		1,295,000		3,280,443		4,575,443		822,262		2002	40 yrs.
6200 Old Dobbin Lane	Columbia, MD		—		958,105				3,716,920		1,295,000		3,380,026		4,675,026		854,267		2002	40 yrs.
6210 Old Dobbin Lane	Columbia, MD		—		958,105				3,936,052		1,307,300		3,586,857		4,894,157		1,107,901		2002	40 yrs.
6250 Old Dobbin Lane	Columbia, MD		—		958,105				3,938,014		1,599,259		3,296,861		4,896,120		585,317		2000	40 yrs.
9755 Patuxent Woods Drive	Columbia, MD		—		3,917,094		14,959,075		3,142,376		3,922,382		18,096,163		22,018,545		3,483,259		2006	40 yrs.
6220 Old Dobbin Lane	Columbis, MD		—		3,865,848		—		7,741,067		3,166,951		8,439,964		11,606,915		893,106		2006	40 yrs.
1250 Hall Court	Deer Park, TX		2,887,908		829,570		4,778,327		47,398		831,611		4,823,685		5,655,296		537,788		2006	40 yrs.
170 Parkway West	Duncan, SC		—		598,348		3,643,756		126,879		598,918		3,770,065		4,368,983		556,253		2006	40 yrs.
190 Parkway West	Duncan, SC		—		551,663		3,310,993		209,022		552,211		3,519,466		4,071,678		493,195		2006	40 yrs.
265 Parkway East	Duncan, SC		—		901,444		5,751,389		18,391		902,374		5,768,850		6,671,224		940,104		2006	40 yrs.
285 Parkway East	Duncan, SC		—		975,433		5,851,990		318,001		976,393		6,169,031		7,145,424		718,293		2006	40 yrs.
3255 Neil Armstrong Boulevard	Eagan, MN		—		1,131,017		—		3,366,266		1,103,860		3,393,423		4,497,283		1,019,172		1998	40 yrs.
6321-6325 Bury Drive	Eden Prairie, MN		—		462,876		4,151,790		960,674		462,876		5,112,465		5,575,340		1,578,052		1988	40 yrs.
7660-7716 Golden Triangle Drive	Eden Prairie, MN		—		568,706		5,115,177		2,094,867		1,289,215		6,489,535		7,778,750		2,282,668		1988	40 yrs.
7400 Flying Cloud Drive	Eden Prairie, MN		—		195,982		1,762,027		1,066,844		768,344		2,256,509		3,024,853		669,661		1987	40 yrs.
10301-10305 West 70th Street	Eden Prairie, MN		—		120,622		1,085,226		407,233		118,300		1,494,781		1,613,081		498,869		1984	40 yrs.
10321 West 70th Street	Eden Prairie, MN		—		145,198		1,305,700		253,930		142,399		1,562,429		1,704,828		468,136		1984	40 yrs.
10333 West 70th Street	Eden Prairie, MN		—		110,746		995,868		279,138		108,610		1,277,142		1,385,752		434,055		1984	40 yrs.
10349-10357 West 70th Street	Eden Prairie, MN		—		275,903		2,481,666		480,014		270,584		2,966,999		3,237,582		1,098,940		1985	40 yrs.
10365-10375 West 70th Street	Eden Prairie, MN		—		291,077		2,618,194		391,586		285,464		3,015,393		3,300,857		1,115,447		1985	40 yrs.
10393-10394 West 70th Street	Eden Prairie, MN		—		269,618		2,423,318		807,298		264,419		3,235,815		3,500,235		1,151,828		1985	40 yrs.
7078 Shady Oak Road	Eden Prairie, MN		—		343,093		3,085,795		928,780		336,481		4,021,187		4,357,668		1,267,456		1985	40 yrs.
10400 Viking Drive	Eden Prairie, MN		—		2,912,391		—		22,099,352		2,938,372		22,073,370		25,011,743		7,401,528		1999	40 yrs.
7625 Smetana Lane	Eden Prairie, MN		—		4,500,641		—		2,987,320		1,916,609		5,571,353		7,487,962		693,360		2006	40 yrs.
7695-7699 Anagram Drive	Eden Prairie, MN		—		760,525		3,254,758		623,355		760,525		3,878,113		4,638,638		1,490,532		1997	40 yrs.
7800 Equitable Drive	Eden Prairie, MN		—		2,188,525		3,788,762		128,371		2,188,525		3,917,133		6,105,657		1,245,568		1993	40 yrs.
7905 Fuller Road	Eden Prairie, MN		—		1,229,862		4,075,167		1,980,136		1,230,965		6,054,200		7,285,165		1,951,366		1994	40 yrs.
9023 Columbine Road	Eden Prairie, MN		—		1,956,273		—		4,822,802		1,956,273		4,822,802		6,779,075		1,592,158		1999	40 yrs.
8967 Columbine Road	Eden Prairie, MN		—		1,450,000		—		3,575,107		1,450,000		3,575,107		5,025,107		1,122,027		2000	40 yrs.
7777 Golden Triangle Drive	Eden Prairie, MN		—		993,101		2,136,862		1,145,948		993,101		3,282,810		4,275,911		1,029,470		2000	40 yrs.
8937 Columbine Road	Eden Prairie, MN		—		1,325,829				4,191,274		1,739,966		3,777,137		5,517,103		973,945		2001	40 yrs.
7615 Smetana Lane	Eden Prairie, MN		—		1,011,517				8,510,179		3,000,555		6,521,141		9,521,696		1,891,508		2001	40 yrs.
8995 Columbine Road	Eden Prairie, MN		—		1,087,594				3,664,053		2,055,296		2,696,352		4,751,648		761,228		2001	40 yrs.
8911 Columbine Road (B2)	Eden Prairie, MN		—		916,687				3,782,331		1,718,407		2,980,611		4,699,018		712,167		2000	40 yrs.
8855 Columbine Road	Eden Prairie, MN		—		1,400,925				5,226,016		1,599,757		5,027,185		6,626,941		837,201		2000	40 yrs.
7075 Flying Cloud Drive	Eden Prairie, MN		—		10,232,831		10,855,851		53,337		10,243,977		10,898,042		21,142,019		1,045,470		2007	40 yrs.
7351 Coca Cola Drive	Elkridge, MD		—		1,897,044		—		6,154,082		3,023,417		5,027,709		8,051,126		(245,874	)	2006	40 yrs.

73

LIBERTY PROPERTY TRUST
REAL ESTATE AND ACCUMULATED DEPRECIATION
AS OF DECEMBER 31, 2010

								Costs
								Capitalized										Date of
								Subsequent		Gross Amount Carried at End of Period						Accumulated		Construction	Depreciable
				Initial Cost				to		Land and		Building and		Total		Depreciation		or	life
Project	Location	Encumbrances		Land		Building		Acquisition		Improvements		Improvements		12/31/2010		12/31/10		Acquisition	(years)
OPERATING PROPERTIES
180 Sheree Boulevard	Exton, PA		4,912,627		2,647,861		11,334,403		2,113,356		2,649,426		13,446,194		16,095,620		1,715,054	2007	40 yrs.
7028 Snowdrift Road	Fogelville, PA		—		520,473		959,279		157,281		524,390		1,112,644		1,637,033		305,730	1982	40 yrs.
420 Delaware Drive	Fort Washington, PA		—		2,766,931		—		8,290,952		2,826,994		8,230,889		11,057,884		1,043,789	2005	40 yrs.
414 Commerce Drive	Fort Washington, PA		—		1,267,194		2,217,460		329,544		1,267,937		2,546,260		3,814,197		411,754	2004	40 yrs.
275 Commerce Drive	Fort Washington, PA		—		1,775,894		2,160,855		7,453,925		1,790,041		9,600,633		11,390,674		838,469	2005	40 yrs.
1250 Virginia Drive	Fort Washington, PA		—		1,639,166		1,928,574		447,001		1,650,703		2,364,038		4,014,741		367,824	2005	40 yrs.
1100 Virginia Drive	Fort Washington, PA		—		35,619,946		51,390,540		15,920,254		36,374,955		66,555,784		102,930,739		7,272,746	2006	40 yrs.
106 Southchase Boulevard	Fountain Inn, SC		—		201,944		—		5,133,389		684,003		4,651,330		5,335,333		591,074	2005	40 yrs.
9601 Cosner Drive	Fredericksburg, VA		—		475,262		3,917,234		214,221		475,262		4,131,454		4,606,716		1,604,227	1995	40 yrs.
200 W Cypress Creek Road	Ft Lauderdale, FL		—		3,414,989		2,399,738		9,612,936		3,414,989		12,012,675		15,427,663		2,215,114	2003	40 yrs.
5410 - 5430 Northwest 33rd Avenue	Ft. Lauderdale, FL		—		603,776		4,176,238		1,188,682		625,111		5,343,586		5,968,696		1,950,986	1985	40 yrs.
4880 Cox Road	Glen Allen, VA		—		743,898		4,499,807		3,060,575		743,898		7,560,382		8,304,280		2,513,321	1995	40 yrs.
5000 Cox Road	Glen Allen, VA		—		770,214		3,685,248		241,155		771,029		3,925,588		4,696,617		1,463,680	1990	40 yrs.
5500 Cox Road	Glen Allen, VA		—		443,485		—		3,199,335		483,263		3,159,557		3,642,820		1,077,363	1999	40 yrs.
4801 Cox Road	Glen Allen, VA		—		1,072,896		—		10,561,112		1,075,620		10,558,388		11,634,008		3,773,270	1998	40 yrs.
4198 Cox Road	Glen Allen, VA		—		670,292		3,839,245		960,055		670,292		4,799,300		5,469,591		1,558,839	1984	40 yrs.
4510 Cox Road	Glen Allen, VA		—		1,010,024		7,151,729		1,428,858		1,010,044		8,580,567		9,590,611		3,022,299	1990	40 yrs.
4121 Cox Road	Glen Allen, VA		—		1,083,006		6,035,653		754,889		1,083,006		6,790,542		7,873,548		1,208,027	2004	40 yrs.
200 Southchase Boulevard	Greenville, SC		—		512,911				6,273,615		515,542		6,270,984		6,786,525		1,105,261	2003	40 yrs.
45 Brookfield Oaks Drive	Greenville, SC		—		818,114		—		3,545,588		825,529		3,538,173		4,363,702		291,245	2006	40 yrs.
116 Pleasant Ridge Road	Greenville, SC		—		1,547,811		—		13,779,580		3,712,683		11,614,708		15,327,391		707,040	2006	40 yrs.
7 Research Drive	Greenville, SC		—		—		17,091,882		4,405		—		17,096,287		17,096,287		1,721,813	2007	40 yrs.
1487 South Highway 101	Greer, SC		—		464,237		—		5,631,587		1,301,738		4,794,086		6,095,824		232,720	2007	40 yrs.
11841 Newgate Boulevard	Hagerstown, MD		—		3,356,207		—		30,555,755		9,741,685		24,170,277		33,911,962		1,082,575	2008	40 yrs.
1 Enterprise Parkway	Hampton, VA		—		974,675		5,579,869		1,430,422		974,675		7,010,291		7,984,966		2,256,731	1987	40 yrs.
22 Enterprise Parkway	Hampton, VA		—		1,097,368		6,760,778		1,149,934		1,097,368		7,910,712		9,008,080		2,531,828	1990	40 yrs.
5 Manhattan Square	Hampton, VA		—		207,368		—		1,535,913		212,694		1,530,586		1,743,281		487,934	1999	40 yrs.
1317 Executive Boulevard	Hampton, VA		—		1,650,423		—		7,819,255		1,128,829		8,340,849		9,469,678		1,060,866	2006	40 yrs.
21 Enterprise Parkway	Hampton, VA		—		263,668		8,167,118		640,550		265,719		8,805,617		9,071,336		2,253,821	1999	40 yrs.
521 Butler Farm Road	Hampton, VA		—		750,769		2,911,149		369,221		710,486		3,320,652		4,031,139		650,590	2003	40 yrs.
7317 Parkway Drive	Hanover, MD		—		1,104,359		1,959,671		25,658		1,104,359		1,985,329		3,089,688		594,468	1983	40 yrs.
7361 Coca Cola Drive	Hanover, MD		—		2,245,187		—		9,353,170		3,822,710		7,775,647		11,598,357		345,579	2004	40 yrs.
600 Industrial Drive	Harrisburg, PA		—		7,743,800		—		28,367,702		9,368,557		26,742,945		36,111,502		3,446,033	2005	40 yrs.
500 McCarthy Drive	Harrisburg, PA		*		5,194,872		19,991,436		4,518,658		5,687,013		24,017,953		29,704,966		4,595,442	2005	40 yrs.
4170 Mendenhall Oaks Parkway	High Point , NC		—		143,699		—		2,109,626		373,502		1,879,822		2,253,325		665,989	1999	40 yrs.
4180 Mendenhall Oaks Parkway	High Point , NC		—		121,329		—		1,620,276		315,614		1,425,991		1,741,605		442,317	1999	40 yrs.
4050 Piedmont Parkway	High Point , NC		—		801,902		—		20,677,603		2,042,159		19,437,347		21,479,505		6,672,869	1998	40 yrs.
4523 Green Point Drive	High Point, NC		—		234,564		—		3,393,949		235,698		3,392,816		3,628,513		1,449,631	1988	40 yrs.
4501 Green Point Drive	High Point, NC		—		319,289		—		2,466,168		320,450		2,465,007		2,785,457		1,255,878	1989	40 yrs.
4500 Green Point Drive	High Point, NC		—		230,622		—		2,111,872		231,692		2,110,803		2,342,494		1,068,491	1989	40 yrs.
4524 Green Point Drive	High Point, NC		—		182,810		—		2,376,534		183,888		2,375,456		2,559,344		1,129,562	1989	40 yrs.
4328, 4336 Federal Drive	High Point, NC		3,314,214		521,122		—		7,328,753		825,092		7,024,783		7,849,875		4,317,782	1995	40 yrs.
4344 Federal Drive	High Point, NC		—		484,001		—		2,656,217		173,623		2,966,595		3,140,218		1,260,185	1996	40 yrs.
4000 Piedmont Parkway	High Point, NC		—		592,885		4,825,615		669,468		597,368		5,490,600		6,087,969		2,180,600	1989	40 yrs.
4380 Federal Drive	High Point, NC		—		282,996		—		2,033,400		283,368		2,033,028		2,316,396		799,262	1997	40 yrs.
4388 Federal Drive	High Point, NC		—		143,661		—		1,057,225		132,655		1,068,231		1,200,886		382,264	1997	40 yrs.
4160 Mendenhall Oaks Parkway	High Point, NC		—		285,882		—		3,037,383		545,627		2,777,638		3,323,265		880,113	1998	40 yrs.
4194 Mendenhall Oaks Parkway	High Point, NC		—		102,372		—		2,466,427		265,991		2,302,808		2,568,799		844,753	1999	40 yrs.
4196 Mendenhall Oaks Parkway	High Point, NC		—		66,731		—		2,092,124		173,889		1,984,966		2,158,855		684,926	1999	40 yrs.
4300 Federal Drive	High Point, NC		—		264,038		—		2,226,497		276,038		2,214,497		2,490,534		600,059	1998	40 yrs.
4135 Mendenall Oaks Parkway	High Point, NC		—		499,500		—		3,447,995		500,980		3,446,515		3,947,495		1,151,155	2000	40 yrs.
1498 Eagle Hill Drive	High Point, NC		—		94,274		—		6,127,302		791,880		5,429,696		6,221,576		492,375	2005	40 yrs.
4183 Eagle Hill Drive	High Point, NC		—		122,203				3,263,729		526,266		2,859,666		3,385,932		1,018,058	2001	40 yrs.
4189 Eagle Hill Drive	High Point, NC		—		100,106				3,432,266		431,106		3,101,266		3,532,372		1,043,576	2001	40 yrs.
4020 Meeting Way	High Point, NC		—		94,232				1,682,549		378,101		1,398,680		1,776,781		441,483	2001	40 yrs.
1400 Mendenhall Oaks Parkway	High Point, NC		—		172,320				7,016,383		984,672		6,204,031		7,188,704		1,580,430	2002	40 yrs.
4191 Mendenhall Oaks Parkway	High Point, NC		—		217,943				3,007,486		611,166		2,614,263		3,225,429		627,812	2002	40 yrs.
4015 Meeting Way	High Point, NC		—		510,000		—		2,780,599		511,869		2,778,730		3,290,599		433,881	2003	40 yrs.
4195 Eagle Hill Drive	High Point, NC		—		107,586		—		3,584,254		505,700		3,186,140		3,691,840		523,533	2004	40 yrs.
400 Mendenhall Oaks Parkway	High Point, NC		—		—		—		1,973,021		665,239		1,307,782		1,973,021		147,305	2004	40 yrs.
4475 Premier Drive	High Point, NC		—		748,693		—		6,801,791		1,525,421		6,025,063		7,550,484		374,361	2006	40 yrs.
100 Witmer Road	Horsham, PA		—		3,102,784		—		20,104,942		3,764,784		19,442,942		23,207,726		4,720,873	1996	40 yrs.
132 Welsh Road	Horsham, PA		—		1,333,642		—		4,039,073		1,408,041		3,964,674		5,372,715		1,368,709	1998	40 yrs.
300 Welsh Road — Building 3	Horsham, PA		—		180,459		1,441,473		558,090		180,459		1,999,563		2,180,022		626,642	1983	40 yrs.
300 Welsh Road — Building 4	Horsham, PA		—		282,493		2,256,508		1,804,507		282,493		4,061,015		4,343,508		1,362,227	1983	40 yrs.
2 Walnut Grove Drive	Horsham, PA		—		1,281,870		7,767,374		1,343,251		1,265,363		9,127,132		10,392,495		3,411,586	1989	40 yrs.
5 Walnut Grove Drive	Horsham, PA		—		1,065,951		—		9,979,535		1,939,712		9,105,774		11,045,486		2,506,444	2000	40 yrs.
200 Gibraltar Road	Horsham, PA		—		638,513		5,811,323		1,184,244		638,513		6,995,567		7,634,080		2,350,191	1990	40 yrs.
220 Gibraltar Road	Horsham, PA		—		629,944		5,733,228		1,159,203		629,944		6,892,431		7,522,375		2,706,844	1990	40 yrs.
240 Gibraltar Road	Horsham, PA		—		629,944		5,733,234		1,844,399		629,944		7,577,633		8,207,577		3,290,787	1990	40 yrs.
1 Walnut Grove Drive	Horsham, PA		—		1,058,901		5,343,606		378,615		1,058,901		5,722,221		6,781,122		1,966,851	1986	40 yrs.
181-187 Gibraltar Road	Horsham, PA		—		360,549		3,259,984		787,154		360,549		4,047,138		4,407,687		1,541,736	1982	40 yrs.
104 Rock Road	Horsham, PA		—		330,111		2,981,669		594,916		330,111		3,576,586		3,906,696		1,236,229	1974	40 yrs.

74

LIBERTY PROPERTY TRUST
REAL ESTATE AND ACCUMULATED DEPRECIATION
AS OF DECEMBER 31, 2010

								Costs
								Capitalized										Date of
								Subsequent		Gross Amount Carried at End of Period						Accumulated		Construction	Depreciable
				Initial Cost				to		Land and		Building and		Total		Depreciation		or	life
Project	Location	Encumbrances		Land		Building		Acquisition		Improvements		Improvements		12/31/2010		12/31/10		Acquisition	(years)
OPERATING PROPERTIES
123-135 Rock Road	Horsham, PA		—		292,360		2,411,677		2,040,774		393,019		4,351,791		4,744,810		1,183,589	1975	40 yrs.
111-159 Gibraltar Road	Horsham, PA		—		489,032		4,126,151		1,143,504		489,032		5,269,655		5,758,687		1,871,705	1981	40 yrs.
161-175 Gibraltar Road	Horsham, PA		—		294,673		2,663,722		931,107		294,673		3,594,829		3,889,502		1,251,908	1976	40 yrs.
103-109 Gibraltar Road	Horsham, PA		—		270,906		2,448,500		348,986		270,906		2,797,486		3,068,392		967,476	1978	40 yrs.
261-283 Gibraltar Road	Horsham, PA		—		464,871		3,951,972		1,781,426		464,871		5,733,397		6,198,268		1,675,874	1978	40 yrs.
210-223 Witmer Road	Horsham, PA		—		270,282		2,441,276		1,748,169		270,282		4,189,445		4,459,727		1,431,794	1972	40 yrs.
231-237 Gibraltar Road	Horsham, PA		—		436,952		3,948,963		982,690		436,952		4,931,653		5,368,605		1,693,057	1981	40 yrs.
100 Gibraltar Road	Horsham, PA		—		38,729		349,811		9,589		38,729		359,400		398,129		117,388	1975	40 yrs.
101 Gibraltar Road	Horsham, PA		—		651,990		5,888,989		1,344,093		732,552		7,152,520		7,885,072		2,457,858	1977	40 yrs.
506 Prudential Road	Horsham, PA		—		208,140		895,470		894,621		208,140		1,790,091		1,998,231		572,733	1973	40 yrs.
113-123 Rock Road	Horsham, PA		—		351,072		3,171,001		724,193		451,731		3,794,535		4,246,266		1,188,157	1975	40 yrs.
101-111 Rock Road	Horsham, PA		—		350,561		3,166,389		1,144,743		452,251		4,209,443		4,661,693		1,430,849	1975	40 yrs.
120 Gibraltar Road	Horsham, PA		—		533,142		4,830,515		2,188,624		558,142		6,994,139		7,552,281		2,252,157	1980	40 yrs.
110 Gibraltar Road	Horsham, PA		—		673,041		5,776,369		2,412,155		673,041		8,188,524		8,861,565		2,968,854	1979	40 yrs.
100-107 Lakeside Drive	Horsham, PA		—		239,528		2,163,498		441,510		255,528		2,589,008		2,844,536		838,125	1982	40 yrs.
200-264 Lakeside Drive	Horsham, PA		—		502,705		4,540,597		2,077,571		502,705		6,618,168		7,120,873		1,874,297	1982	40 yrs.
300-309 Lakeside Drive	Horsham, PA		—		369,475		3,338,761		2,033,132		376,475		5,364,892		5,741,368		2,168,644	1982	40 yrs.
400-445 Lakeside Drive	Horsham, PA		—		543,628		4,910,226		2,433,284		583,628		7,303,511		7,887,138		2,566,697	1981	40 yrs.
104 Witmer Road	Horsham, PA		—		1,248,148		—		597,911		189,793		1,656,266		1,846,059		512,431	1975	40 yrs.
201 Gibraltar Road	Horsham, PA		—		380,127		3,433,433		2,012,789		380,802		5,445,547		5,826,349		1,789,949	1983	40 yrs.
719 Dresher Road	Horsham, PA		—		493,426		2,812,067		207,803		495,112		3,018,184		3,513,297		965,932	1987	40 yrs.
4 Walnut Grove	Horsham, PA		—		2,515,115		—		10,809,109		2,515,115		10,809,109		13,324,224		2,926,610	1999	40 yrs.
300 Welsh Road	Horsham, PA		—		696,061		3,339,991		570,429		696,061		3,910,420		4,606,480		1,363,559	1985	40 yrs.
700 Dresher Road	Horsham, PA		—		2,551,777		3,020,638		1,790,780		2,565,140		4,798,056		7,363,195		1,361,027	1987	40 yrs.
680 Blair Mill Road	Horsham, PA		—		3,527,151				17,473,670		4,138,577		16,862,244		21,000,821		3,245,331	2001	40 yrs.
102 Rock Road	Horsham, PA		—		1,110,209		2,301,302		1,133,191		1,114,985		3,429,717		4,544,702		850,586	1985	40 yrs.
335 Commerce Drive	Horsham, PA		—		—		—		8,797,278		182,400		8,614,878		8,797,278		1,796,267	2002	40 yrs.
255 Business Center Drive	Horsham, PA		—		1,154,289		2,007,214		630,669		1,140,597		2,651,574		3,792,171		581,561	2003	40 yrs.
355 Business Center Drive	Horsham, PA		—		483,045		898,798		364,660		471,171		1,275,332		1,746,503		334,557	2003	40 yrs.
455 Business Center Drive	Horsham, PA		—		1,351,011		2,503,449		1,531,087		1,322,317		4,063,231		5,385,547		1,132,169	2003	40 yrs.
555 Business Center Drive	Horsham, PA		—		727,420		1,353,650		431,004		709,967		1,802,108		2,512,075		277,846	2003	40 yrs.
7 Walnut Grove Drive	Horsham, PA		—		2,631,696		—		18,525,660		2,631,956		18,525,400		21,157,356		1,577,227	2006	40 yrs.
747 Dresher Road	Horsham, PA		—		1,607,238		—		4,724,241		1,607,977		4,723,501		6,331,479		2,500,825	1988	40 yrs.
507 Prudential Road	Horsham, PA		—		644,900		5,804,100		8,408,030		1,131,380		13,725,650		14,857,030		5,058,217	1988	40 yrs.
767 Electronic Drive	Horsham, PA		—		1,229,685		—		2,436,397		1,241,970		2,424,112		3,666,082		972,152	1996	40 yrs.
16445 Air Center Boulevard	Houston, TX		*		363,339		2,509,186		163,721		363,339		2,672,908		3,036,247		859,120	1997	40 yrs.
16405 Air Center Boulevard	Houston, TX		*		438,853		3,030,396		339,899		438,853		3,370,294		3,809,147		1,178,648	1997	40 yrs.
16580 Air Center Boulevard	Houston, TX		*		289,000		3,559,857		246,977		289,000		3,806,834		4,095,834		1,111,779	1997	40 yrs.
1755 Trans Central Drive	Houston, TX		*		293,534		3,036,269		146,851		306,147		3,170,506		3,476,653		834,764	1999	40 yrs.
16680 Central Green Boulevard	Houston, TX		*		311,952		—		4,153,893		492,869		3,972,975		4,465,845		368,224	2001	40 yrs.
16605 Air Center Boulevard	Houston, TX		*		298,999				3,328,180		496,186		3,130,994		3,627,180		685,028	2002	40 yrs.
10739 West Little York Road	Houston, TX		*		797,931		5,950,894		148,370		799,560		6,097,635		6,897,195		1,286,211	1999	40 yrs.
10735 West Little York Road	Houston, TX		*		1,110,988		6,351,946		1,638,126		1,135,483		7,965,577		9,101,060		1,512,982	2000	40 yrs.
8801-19 & 8821-49 Fallbrook Drive	Houston, TX		*		2,290,001		15,297,141		1,927,534		2,290,002		17,224,674		19,514,676		3,288,526	2000	40 yrs.
16685 Air Center Boulevard	Houston, TX		*		—		—		2,887,715		414,691		2,473,024		2,887,715		419,524	2004	40 yrs.
8825-8839 N Sam Houston Pkwy	Houston, TX		*		638,453		3,258,815		653,425		638,477		3,912,215		4,550,692		876,801	2004	40 yrs.
8850-8872 Fallbrook Drive	Houston, TX		*		504,317		2,878,351		1,014,679		504,341		3,893,006		4,397,347		947,067	2004	40 yrs.
8802-8824 Fallbrook Drive	Houston, TX		*		2,774,995		6,364,767		1,143,271		2,775,021		7,508,011		10,283,032		1,432,118	2004	40 yrs.
16602 Central Green Boulevard	Houston, TX		*		284,403		—		4,495,522		503,779		4,276,146		4,779,925		583,405	2005	40 yrs.
1646 Rankin Road	Houston, TX		*		329,961		—		4,895,132		592,234		4,632,859		5,225,093		789,638	2005	40 yrs.
8301 Fallbrook Drive	Houston, TX		*		4,515,862		—		23,946,674		5,877,884		22,584,652		28,462,536		1,625,499	2006	40 yrs.
5200 N. Sam Houston Parkway	Houston, TX		*		1,519,458		7,135,548		3,490,870		1,520,074		10,625,802		12,145,877		1,061,203	2007	40 yrs.
5250 N. Sam Houston Parkway	Houston, TX		*		2,173,287		8,868,256		2,265,109		2,173,942		11,132,710		13,306,652		971,211	2007	40 yrs.
11201 Greens Crossing Boulevard	Houston, TX		*		1,006,194		5,412,584		2,687,416		1,008,542		8,097,651		9,106,193		877,726	2007	40 yrs.
850 Greens Parkway	Houston, TX		*		2,893,405		11,593,197		2,680,294		2,899,861		14,267,034		17,166,895		1,122,286	2007	40 yrs.
860 Greens Parkway	Houston, TX		*		1,399,365		6,344,650		1,524,550		1,374,012		7,894,553		9,268,565		642,653	2007	40 yrs.
10301 Round Up Lane	Houston, TX		—		545,501		2,927,700		189,451		545,501		3,117,150		3,662,651		—	2010	40 yrs.
10305 Round Up Lane	Houston, TX		—		1,340,609		7,489,720		621,689		1,340,609		8,111,408		9,452,017		—	2010	40 yrs.
20 Wright Avenue	Hunt Valley, MD		—		1,205,946		—		9,948,585		1,861,025		9,293,506		11,154,531		2,644,871	2001	40 yrs.
4 North Park Drive	Hunt Valley, MD		—		3,269,948		13,551,370		2,495,995		3,269,948		16,047,365		19,317,313		3,060,651	2003	40 yrs.
6 North Park Drive	Hunt Valley, MD		—		2,077,949		8,770,566		1,182,528		2,077,949		9,953,094		12,031,044		2,296,058	2003	40 yrs.
10 North Park Drive	Hunt Valley, MD		—		2,211,969		7,816,042		3,212,810		2,211,969		11,028,852		13,240,821		1,584,542	2003	40 yrs.
307 International Circle	Hunt Valley, MD		—		3,538,319		14,190,832		13,368,615		3,542,881		27,554,885		31,097,766		4,709,104	2004	40 yrs.
309 International Circle	Hunt Valley, MD		—		613,667		2,458,204		705,184		615,096		3,161,959		3,777,055		507,444	2004	40 yrs.
311 International Circle	Hunt Valley, MD		—		313,365		1,281,093		76,921		314,572		1,356,807		1,671,380		181,978	2004	40 yrs.
8775 Baypine Road	Jacksonville, FL		—		906,804		—		9,784,270		913,013		9,778,061		10,691,074		3,210,331	1989	40 yrs.
8665,8667,8669 Baypine Road	Jacksonville, FL		—		966,552		—		5,395,612		974,959		5,387,205		6,362,164		2,809,899	1987	40 yrs.
7077 Bonneval Road	Jacksonville, FL		—		768,000		5,789,000		2,286,322		774,020		8,069,302		8,843,322		3,685,361	1988	40 yrs.
4190 Belfort Road	Jacksonville, FL		—		821,000		5,866,000		2,174,368		827,420		8,033,948		8,861,368		3,162,603	1986	40 yrs.
7020 AC Skinner Parkway	Jacksonville, FL		—		398,257		—		2,328,602		749,811		1,977,048		2,726,859		809,178	1996	40 yrs.
7022 AC Skinner Parkway	Jacksonville, FL		—		706,934		—		2,984,235		853,981		2,837,188		3,691,169		1,111,945	1996	40 yrs.
4345 Southpoint Parkway	Jacksonville, FL		—		—		—		8,339,915		418,093		7,921,822		8,339,915		2,551,053	1998	40 yrs.
7016 AC Skinner Parkway	Jacksonville, FL		—		597,181		—		2,373,250		602,633		2,367,799		2,970,431		1,237,846	1996	40 yrs.

75

LIBERTY PROPERTY TRUST
REAL ESTATE AND ACCUMULATED DEPRECIATION
AS OF DECEMBER 31, 2010

								Costs
								Capitalized			Date of								Date of
								Subsequent			Gross Amount Carried at End of Period						Accumulated		Construction	Depreciable
				Initial Cost				to			Land and		Building and		Total		Depreciation		or	life
Project	Location	Encumbrances		Land		Building		Acquisition			Improvements		Improvements		12/31/2010		12/31/10		Acquisition	(years)
OPERATING PROPERTIES
7018 AC Skinner Parkway	Jacksonville, FL		—		840,996		—		3,583,342			846,461		3,577,877		4,424,338		1,312,357	1997	40 yrs.
7014 AC Skinner Parkway	Jacksonville, FL		—		574,198		—		3,099,770			780,486		2,893,482		3,673,968		1,065,864	1999	40 yrs.
6600 Southpoint Parkway	Jacksonville, FL		—		998,432		4,055,727		903,983			1,002,704		4,955,438		5,958,142		2,027,804	1986	40 yrs.
6700 Southpoint Parkway	Jacksonville, FL		—		620,719		2,989,746		182,927			624,215		3,169,178		3,793,392		1,137,378	1987	40 yrs.
4801 Executive Park Court — 100	Jacksonville, FL		—		554,993		2,993,277		280,904			554,542		3,274,631		3,829,174		1,058,497	1990	40 yrs.
4801 Executive Park Court — 200	Jacksonville, FL		—		370,017		1,995,518		186,685			370,039		2,182,181		2,552,220		737,616	1990	40 yrs.
4810 Executive Park Court	Jacksonville, FL		—		369,694		3,045,639		657,134			370,039		3,702,428		4,072,467		1,264,353	1990	40 yrs.
6602 Executive Park Court — 100	Jacksonville, FL		—		388,519		2,095,293		293,659			388,541		2,388,930		2,777,471		816,571	1993	40 yrs.
6602 Executive Park Court — 200	Jacksonville, FL		—		296,014		1,596,347		388,955			296,032		1,985,284		2,281,316		674,612	1993	40 yrs.
6631 Executive Park Court — 100	Jacksonville, FL		—		251,613		1,356,849		379,477			251,627		1,736,312		1,987,939		782,928	1994	40 yrs.
6631 Executive Park Court — 200	Jacksonville, FL		—		406,561		2,195,070		400,092			407,043		2,594,680		3,001,723		927,069	1994	40 yrs.
4815 Executive Park Court — 100	Jacksonville, FL		—		366,317		1,975,393		106,854			366,339		2,082,225		2,448,564		710,529	1995	40 yrs.
4815 Executive Park Court — 200	Jacksonville, FL		—		462,522		2,494,397		350,687			462,549		2,845,056		3,307,606		885,962	1995	40 yrs.
4825 Executive Park Court	Jacksonville, FL		—		601,278		3,242,491		50,343			601,401		3,292,711		3,894,112		1,094,002	1996	40 yrs.
4820 Executive Park Court	Jacksonville, FL		—		555,173		2,693,130		609,686			555,213		3,302,777		3,857,989		1,148,284	1997	40 yrs.
6601 Executive Park Circle North	Jacksonville, FL		—		551,250		3,128,361		272,737			551,250		3,401,098		3,952,348		1,064,669	1992	40 yrs.
4901 Belfort Road	Jacksonville, FL		—		877,964		2,360,742		1,896,775			877,964		4,257,517		5,135,481		1,580,051	1986	40 yrs.
4875 Belfort Road	Jacksonville, FL		—		2,089,347		—		13,024,417			2,287,152		12,826,612		15,113,764		902,933	1998	40 yrs.
4899 Belfort Road	Jacksonville, FL		—		1,299,201		—		7,893,940			1,168,062		8,025,079		9,193,141		2,385,293	2000	40 yrs.
4905 Belfort Street	Jacksonville, FL		—		638,154		—		3,257,563			641,272		3,254,446		3,895,717		956,755	2000	40 yrs.
7251 Salisbury Road	Jacksonville, FL		—		—		—		3,311,699			662,559		2,649,140		3,311,699		638,611	2000	40 yrs.
10245 Centurion Parkway North	Jacksonville, FL		—		852,644		3,510,889		815,879			853,704		4,325,708		5,179,412		1,302,193	1996	40 yrs.
4887 Belfort Road	Jacksonville, FL		—		1,299,202				7,870,835			1,665,915		7,504,122		9,170,037		2,290,667	2002	40 yrs.
7255 Salisbury Road	Jacksonville, FL		—		392,060				2,639,416			680,766		2,350,710		3,031,476		604,262	2002	40 yrs.
5201 Gate Parkway	Jacksonville, FL		—		3,836,532		—		21,433,694			4,269,346		21,000,880		25,270,226		3,613,901	2005	40 yrs.
3200 Horizon Drive	King of Prussia, PA		—		928,637		—		5,732,526			1,210,137		5,451,025		6,661,162		1,707,805	1996	40 yrs.
440 East Swedesford Road	King of Prussia, PA		—		717,001		4,816,121		2,415,377			717,001		7,231,499		7,948,499		2,853,747	1988	40 yrs.
460 East Swedesford Road	King of Prussia, PA		—		705,317		4,737,487		4,023,707			705,317		8,761,195		9,466,511		2,769,154	1988	40 yrs.
151 South Warner Road	King of Prussia, PA		—		1,218,086		6,937,866		7,153,361			1,187,900		14,121,413		15,309,313		1,001,048	1980	40 yrs.
3604 Horizon Drive	King of Prussia, PA		—		397,178		—		1,590,663			350,874		1,636,967		1,987,841		446,303	1998	40 yrs.
650 Swedesford Road	King of Prussia, PA		—		952,911		6,722,830		7,770,167			952,911		14,492,996		15,445,907		5,467,867	1971	40 yrs.
680 Swedesford Road	King of Prussia, PA		—		952,361		6,722,830		6,936,819			952,361		13,659,650		14,612,010		4,892,817	1971	40 yrs.
3600 Horizon Drive	King of Prussia, PA		—		236,432		1,856,252		784,645			236,432		2,640,897		2,877,328		1,034,596	1989	40 yrs.
3602 Horizon Drive	King of Prussia, PA		—		217,734		1,759,489		263,517			217,809		2,022,931		2,240,740		734,434	1989	40 yrs.
2700 Horizon Drive	King of Prussia, PA		—		764,370		—		3,643,566			867,815		3,540,121		4,407,936		1,092,503	1998	40 yrs.
2900 Horizon Drive	King of Prussia, PA		—		679,440		—		3,503,074			774,096		3,408,418		4,182,514		1,282,774	1998	40 yrs.
2500 Renaissance Boulevard	King of Prussia, PA		—		509,580		—		2,580,729			592,886		2,497,422		3,090,309		980,216	1999	40 yrs.
2300 Renaissance Boulevard	King of Prussia, PA		—		509,580		—		3,042,297			574,152		2,977,725		3,551,877		1,152,908	1999	40 yrs.
2100 Renaissance Boulevard	King of Prussia, PA		—		1,110,111		—		8,386,799			1,132,519		8,364,391		9,496,911		2,455,413	1999	40 yrs.
3400 Horizon Drive	King of Prussia, PA		—		776,496		3,139,068		977,199			776,496		4,116,267		4,892,763		1,287,288	1995	40 yrs.
2301 Renaissance Boulevard	King of Prussia, PA		—		1,645,246		—		30,063,879			4,581,649		27,127,475		31,709,124		7,956,354	2002	40 yrs.
2520 Renaissance Boulevard	King of Prussia, PA		—		1,020,000		—		4,621,206			978,402		4,662,804		5,641,206		1,516,106	1999	40 yrs.
2201 Renaissance Boulevard	King of Prussia, PA		—		—		—		17,600,911			2,413,514		15,187,397		17,600,911		3,744,703	2000	40 yrs.
2560 Renaissance Boulevard	King of Prussia, PA		—		—		—		3,729,254			649,792		3,079,462		3,729,254		1,133,697	2000	40 yrs.
180 South Warner Drive	King of Prussia, PA		—		—		—		9,533,659			—		9,533,659		9,533,659		99,167	2009	40 yrs.
170 South Warner Road	King of Prussia, PA		—		547,800		3,137,400		2,515,288			458,232		5,742,256		6,200,488		2,703,554	1980	40 yrs.
190 South Warner Road	King of Prussia, PA		—		552,200		3,162,600		1,039,347			461,909		4,292,237		4,754,147		1,763,715	1980	40 yrs.
3100 Horizon Drive	King of Prussia, PA		—		601,956		—		1,758,484			611,436		1,749,005		2,360,441		624,398	1995	40 yrs.
3500 Horizon Drive	King of Prussia, PA		—		1,204,839		—		2,830,072			1,223,875		2,811,036		4,034,911		970,905	1996	40 yrs.
3000 Horizon Drive	King of Prussia, PA		—		1,191,449		—		2,476,299			946,703		2,721,045		3,667,748		818,211	1997	40 yrs.
11425 State Highway 225	LaPorte, TX		*		975,974		3,409,036		8,956			977,542		3,416,424		4,393,966		461,715	2006	40 yrs.
11503 State Highway 225	LaPorte, TX		*		2,561,931		9,695,493		184,312			2,566,047		9,875,690		12,441,736		1,075,351	2006	40 yrs.
7528 Walker Way	Lehigh Valley, PA		—		893,441		—		5,510,456			779,330		5,624,568		6,403,897		1,004,672	2004	40 yrs.
8500 Willard Drive	Lehigh, PA		—		6,398,815		—		21,794,707			7,627,526		20,565,997		28,193,522		1,359,631	2004	40 yrs.
8301 Industrial Boulevard	Lehigh, PA		—		11,249,550		—		44,324,333			11,254,716		44,319,167		55,573,883		5,774,422	2005	40 yrs.
31700 Research Park Drive	Madison Heights, MI		—		373,202		1,824,721		(649,436	)		373,203		1,175,284		1,548,487		640,074	1988	40 yrs.
1901 Summit Tower Boulevard	Maitland, FL		—		6,078,791		12,348,567		2,047,678			6,083,206		14,391,831		20,475,037		4,729,802	1998	40 yrs.
45-67 Great Valley Parkway	Malvern, PA		—		795,143		—		4,051,620			795,831		4,050,932		4,846,763		2,511,028	1974	40 yrs.
11,15 Great Valley Parkway	Malvern, PA		—		1,837,050		—		14,959,980			1,837,878		14,959,152		16,797,030		10,849,584	1986	40 yrs.
27-43 Great Valley Parkway	Malvern, PA		—		448,775		—		2,365,913			449,447		2,365,241		2,814,688		1,638,179	1977	40 yrs.
1 Country View Road	Malvern, PA		—		400,000		3,600,000		437,856			406,421		4,031,435		4,437,856		1,620,776	1982	40 yrs.
200 Chesterfield Parkway	Malvern, PA		—		495,893		2,739,093		578,651			588,384		3,225,253		3,813,637		2,264,448	1989	40 yrs.
50 Morehall Road	Malvern, PA		—		849,576		—		13,051,932			1,337,076		12,564,432		13,901,508		5,780,886	1997	40 yrs.
1 Great Valley Parkway	Malvern, PA		—		419,460		3,792,570		448,271			419,460		4,240,841		4,660,301		1,406,540	1982	40 yrs.
5 Great Valley Parkway	Malvern, PA		—		684,200		6,181,661		1,594,859			684,200		7,776,520		8,460,720		2,644,135	1983	40 yrs.
1001 Cedar Hollow Road	Malvern, PA		—		1,436,814		—		16,081,159			1,676,470		15,841,503		17,517,973		6,710,183	1998	40 yrs.
3 Country View Road	Malvern, PA		—		814,278		—		4,946,433			1,128,881		4,631,830		5,760,711		1,447,364	1998	40 yrs.
425 Technology Drive	Malvern, PA		—		191,114		—		1,571,119			321,473		1,440,760		1,762,233		480,323	1998	40 yrs.
375 Technology Drive	Malvern, PA		—		191,114		—		1,616,195			234,922		1,572,387		1,807,309		508,813	1998	40 yrs.
45 Liberty Boulevard	Malvern, PA		—		4,380,221		—		15,316,168			4,749,748		14,946,641		19,696,389		6,333,780	1999	40 yrs.
100 Chesterfield Parkway	Malvern, PA		—		1,320,625		—		6,709,379			1,451,139		6,578,865		8,030,004		2,967,620	1998	40 yrs.
600 Chesterfield Parkway	Malvern, PA		—		2,013,750		—		8,255,848			2,171,080		8,098,519		10,269,598		3,451,850	1999	40 yrs.
700 Chesterfield Parkway	Malvern, PA		—		2,013,750		—		8,216,674			2,158,337		8,072,087		10,230,424		3,425,023	1999	40 yrs.

76

LIBERTY PROPERTY TRUST
REAL ESTATE AND ACCUMULATED DEPRECIATION
AS OF DECEMBER 31, 2010

								Costs
								Capitalized										Date of
								Subsequent		Gross Amount Carried at End of Period						Accumulated		Construction	Depreciable
				Initial Cost				to		Land and		Building and		Total		Depreciation		or	life
Project	Location	Encumbrances		Land		Building		Acquisition		Improvements		Improvements		12/31/2010		12/31/10		Acquisition	(years)
OPERATING PROPERTIES
18 Great Valley Parkway	Malvern, PA		—		394,036		3,976,221		99,539		397,293		4,072,504		4,469,796		1,230,874	1980	40 yrs.
11 Great Valley Parkway	Malvern, PA		—		496,297		—		3,227,678		708,331		3,015,644		3,723,975		947,673	2001	40 yrs.
40 Liberty Boulevard	Malvern, PA		—		4,241,137		17,737,090		2,182,842		4,241,167		19,919,901		24,161,068		7,048,952	1989	40 yrs.
2 West Liberty Boulevard	Malvern, PA		—		5,405,041		—		11,668,182		5,405,042		11,668,182		17,073,224		2,050,056	2003	40 yrs.
10 Great Valley Parkway	Malvern, PA		—		823,540		1,341,376		441,767		832,244		1,774,439		2,606,683		377,847	2003	40 yrs.
10, 20 Liberty Boulevard	Malvern, PA		—		724,058		—		5,339,789		724,846		5,339,001		6,063,847		2,671,964	1985	40 yrs.
420 Lapp Road	Malvern, PA		—		1,054,418		—		7,172,977		1,055,243		7,172,152		8,227,395		3,591,164	1989	40 yrs.
14 Lee Boulevard	Malvern, PA		—		664,282		—		5,569,322		643,892		5,589,712		6,233,604		3,088,228	1988	40 yrs.
500 Chesterfield Parkway	Malvern, PA		—		472,364		—		2,839,137		519,742		2,791,760		3,311,501		1,459,917	1988	40 yrs.
300-400 Chesterfield Parkway	Malvern, PA		—		937,212		—		4,998,361		1,012,843		4,922,731		5,935,573		2,592,952	1988	40 yrs.
40 Valley Stream Parkway	Malvern, PA		—		322,918		—		3,233,318		325,775		3,230,461		3,556,236		1,979,657	1987	40 yrs.
50 Valley Stream Parkway	Malvern, PA		—		323,971		—		3,112,784		323,792		3,112,964		3,436,755		1,723,526	1987	40 yrs.
20 Valley Stream Parkway	Malvern, PA		—		465,539		—		5,309,203		466,413		5,308,329		5,774,742		3,213,237	1987	40 yrs.
257-275 Great Valley Parkway	Malvern, PA		—		504,611		—		4,583,549		505,458		4,582,702		5,088,160		2,988,275	1983	40 yrs.
300 Technology Drive	Malvern, PA		—		368,626		—		1,344,816		374,497		1,338,945		1,713,442		832,359	1985	40 yrs.
277-293 Great Valley Parkway	Malvern, PA		—		530,729		—		2,370,515		531,534		2,369,710		2,901,244		1,428,758	1984	40 yrs.
311 Technology Drive	Malvern, PA		—		397,131		—		2,846,006		397,948		2,845,189		3,243,137		1,717,478	1984	40 yrs.
7 Great Valley Parkway	Malvern, PA		—		176,435		—		4,316,950		177,317		4,316,068		4,493,385		2,563,412	1985	40 yrs.
55 Valley Stream Parkway	Malvern, PA		—		215,005		—		4,134,390		215,818		4,133,578		4,349,395		2,481,839	1983	40 yrs.
65 Valley Stream Parkway	Malvern, PA		—		381,544		—		6,715,903		382,361		6,715,086		7,097,447		4,337,741	1983	40 yrs.
508 Lapp Road	Malvern, PA		—		331,392		—		1,680,547		332,216		1,679,723		2,011,939		1,099,532	1984	40 yrs.
10 Valley Stream Parkway	Malvern, PA		—		509,075		—		2,787,619		509,899		2,786,796		3,296,694		1,670,677	1984	40 yrs.
333 Phoenixville Pike	Malvern, PA		—		523,530		—		3,708,843		524,230		3,708,143		4,232,373		1,937,657	1985	40 yrs.
30 Great Valley Parkway	Malvern, PA		—		128,126		—		350,938		128,783		350,281		479,064		310,396	1975	40 yrs.
75 Great Valley Parkway	Malvern, PA		128,206		143,074		—		618,372		143,811		617,635		761,446		441,406	1977	40 yrs.
77-123 Great Valley Parkway	Malvern, PA		—		887,664		—		5,484,101		888,359		5,483,406		6,371,765		3,660,279	1978	40 yrs.
205 Great Valley Parkway	Malvern, PA		—		1,368,259		—		9,533,661		1,369,003		9,532,917		10,901,920		6,153,357	1981	40 yrs.
12,14,16 Great Valley Parkway	Malvern, PA		—		130,689		—		1,298,902		128,767		1,300,824		1,429,591		812,221	1982	40 yrs.
155 Great Valley Parkway	Malvern, PA		—		625,147		—		2,603,724		626,068		2,602,804		3,228,871		1,752,418	1981	40 yrs.
510 Lapp Road	Malvern, PA		—		356,950		—		926,587		357,751		925,786		1,283,537		659,141	1983	40 yrs.
60 Morehall Road	Malvern, PA		—		865,424		9,285,000		5,099,729		884,974		14,365,179		15,250,153		8,205,995	1989	40 yrs.
5 Country View Road	Malvern, PA		—		785,168		4,678,632		859,306		786,235		5,536,870		6,323,106		2,413,402	1985	40 yrs.
7550 Meridian Circle	Maple Grove, MN		—		513,250		2,901,906		851,435		513,250		3,753,340		4,266,590		1,116,812	1989	40 yrs.
701A Route 73 South	Marlton, NJ		—		264,387		3,772,000		3,430,681		271,743		7,195,325		7,467,068		2,991,309	1987	40 yrs.
701C Route 73 South	Marlton, NJ		—		84,949		1,328,000		1,000,645		96,161		2,317,433		2,413,594		913,561	1987	40 yrs.
400 Lippincott Drive	Marlton, NJ		—		69,402				3,665,348		317,799		3,416,951		3,734,750		1,282,570	1999	40 yrs.
406 Lippincott Drive	Marlton, NJ		—		321,455		1,539,871		940,855		327,554		2,474,627		2,802,181		1,068,512	1990	40 yrs.
301 Lippincott Drive	Marlton, NJ		—		1,069,837		4,780,163		2,631,930		1,069,838		7,412,092		8,481,930		2,061,080	1988	40 yrs.
303 Lippincott Drive	Marlton, NJ		—		1,069,837		4,780,163		2,702,827		1,069,838		7,482,990		8,552,827		3,327,490	1988	40 yrs.
75 Brookfield Oaks Drive	Mauldin, SC		—		419,731		—		2,338,692		430,909		2,327,514		2,758,423		335,918	2003	40 yrs.
65 Brookfield Oaks Drive	Mauldin, SC		—		557,174		—		2,890,851		506,318		2,941,708		3,448,026		444,608	2004	40 yrs.
7800 N. 113th Street	Milwaukee, WI		—		1,711,964		6,847,857		328,453		1,711,964		7,176,310		8,888,274		2,177,967	1991	40 yrs.
11950 W. Lake Park Drive	Milwaukee, WI		—		391,813		2,340,118		611,440		394,938		2,948,434		3,343,371		1,136,137	1986	40 yrs.
11400 W. Lake Park Drive	Milwaukee, WI		—		439,595		2,357,904		349,777		443,101		2,704,175		3,147,276		867,142	1986	40 yrs.
11425 W. Lake Park Drive	Milwaukee, WI		—		382,256		2,350,619		475,651		385,305		2,823,221		3,208,526		1,022,821	1987	40 yrs.
11301 W. Lake Park Drive	Milwaukee, WI		—		614,477		2,626,456		134,458		619,465		2,755,926		3,375,391		818,665	1987	40 yrs.
11900 W. Lake Park Drive	Milwaukee, WI		—		347,853		2,396,887		1,121,832		350,628		3,515,945		3,866,572		887,795	1987	40 yrs.
11414 West Park Place	Milwaukee, WI		—		234,443				10,406,336		491,531		10,149,249		10,640,780		3,506,918	2001	40 yrs.
11520 West Calumet Road	Milwaukee, WI		—		341,698		1,527,548		48,494		341,698		1,576,042		1,917,740		429,338	1995	40 yrs.
12100 West Park Place	Milwaukee, WI		—		534,470		3,239,389		655,767		532,370		3,897,257		4,429,627		1,320,028	1984	40 yrs.
11100 West Liberty Drive	Milwaukee, WI		—		1,800,000				7,542,950		1,801,024		7,541,926		9,342,950		1,929,894	2003	40 yrs.
11050 West Liberty Drive	Milwaukee, WI		—		—		—		3,826,790		914,760		2,912,030		3,826,790		333,900	2005	40 yrs.
4700 Nathan Lane North	Minneapolis, MN		—		1,501,308		8,446,083		225,056		1,501,308		8,671,139		10,172,447		2,433,469	1996	40 yrs.
4600 Nathan Lane	Minneapolis, MN		—		1,063,558				7,982,141		1,038,197		8,007,502		9,045,699		2,683,502	2002	40 yrs.
4700 Nathan Lane N — Expansion	Minneapolis, MN		—		—		—		13,170,503		—		13,170,503		13,170,503		453,689	2008	40 yrs.
12501 & 12701 Whitewater Drive	Minnegonka, MN		—		2,175,209		3,948,085		7,814,360		2,177,953		11,759,701		13,937,654		2,599,590	1986	40 yrs.
5600 & 5610 Rowland Road	Minnetonka, MN		—		828,650		7,399,409		1,198,281		829,263		8,597,077		9,426,340		2,804,794	1988	40 yrs.
5400-5500 Feltl Road	Minnetonka, MN		—		883,895		7,983,345		2,010,460		883,895		9,993,805		10,877,700		3,439,643	1985	40 yrs.
3400 Lakeside Drive	Miramar, FL		—		2,022,153		11,345,881		1,500,922		2,022,153		12,846,802		14,868,955		4,233,890	1990	40 yrs.
3450 Lakeside Drive	Miramar, FL		—		2,022,152		11,357,143		2,330,445		2,022,152		13,687,587		15,709,739		4,715,477	1990	40 yrs.
3350 SW 148th Avenue	Miramar, FL		—		2,960,511		—		18,619,103		2,980,689		18,598,924		21,579,613		5,960,178	2000	40 yrs.
3100 SW 145th Avenue	Miramar, FL		—		6,204,407		—		15,562,898		6,265,000		15,502,305		21,767,305		610,702	2007	40 yrs.
324 Park Knoll Drive	Morrisville, NC		*		1,449,092		4,424,932		271,387		1,449,450		4,695,961		6,145,411		471,106	2007	40 yrs.
619 Distribution Drive	Morrisville, NC		*		1,031,430		5,655,167		341,601		1,031,685		5,996,513		7,028,198		583,893	2007	40 yrs.
627 Distribution Drive	Morrisville, NC		*		1,061,370		5,152,110		359,118		1,061,632		5,510,966		6,572,598		498,992	2007	40 yrs.
701 Distribution Drive	Morrisville, NC		*		1,300,889		5,313,226		207,183		1,301,211		5,520,088		6,821,298		558,602	2007	40 yrs.
323 Park Knoll Drive	Morrisville, NC		2,828,450		1,071,600		4,397,807		103,718		1,071,600		4,501,525		5,573,125		—	2010	40 yrs.
330 Fellowship Road	Mount Laurel, NJ		—		3,730,570		—		16,883,907		3,758,270		16,856,207		20,614,477		1,110,722	2006	40 yrs.
300 Fellowship Road	Mt Laurel, NJ		—		—		—		7,350,519		1,098,904		6,251,616		7,350,519		1,257,353	2004	40 yrs.
302 Fellowship Road	Mt Laurel, NJ		—		1,512,120		—		2,881,267		539,060		3,854,327		4,393,387		585,570	2001	40 yrs.
3001 Leadenhall Road	Mt Laurel, NJ		—		1,925,719		191,390		10,965,396		1,936,489		11,146,016		13,082,505		2,583,731	2003	40 yrs.
350 Fellowship Road	Mt Laurel, NJ		—		2,960,159		1,449,611		4,586,987		2,970,687		6,026,071		8,996,757		818,387	2006	40 yrs.
3000 Atrium Way	Mt. Laurel, NJ		—		500,000		4,500,000		3,472,518		512,018		7,960,500		8,472,518		3,156,097	1987	40 yrs.

77

LIBERTY PROPERTY TRUST
REAL ESTATE AND ACCUMULATED DEPRECIATION
AS OF DECEMBER 31, 2010

								Costs
								Capitalized										Date of
								Subsequent		Gross Amount Carried at End of Period						Accumulated		Construction	Depreciable
				Initial Cost				to		Land and		Building and		Total		Depreciation		or	life
Project	Location	Encumbrances		Land		Building		Acquisition		Improvements		Improvements		12/31/2010		12/31/10		Acquisition	(years)
OPERATING PROPERTIES
11000, 15000 Commerce Parkway	Mt. Laurel, NJ		—		310,585		4,394,900		229,583		311,950		4,623,118		4,935,068		1,835,463	1985	40 yrs.
12000, 14000 Commerce Parkway	Mt. Laurel, NJ		—		361,800		3,285,817		775,089		362,855		4,059,850		4,422,706		1,758,052	1985	40 yrs.
16000, 18000 Commerce Parkway	Mt. Laurel, NJ		—		289,700		2,512,683		1,084,817		290,545		3,596,655		3,887,200		1,445,408	1985	40 yrs.
1300 Route 73 North	Mt. Laurel, NJ		—		449,400		3,074,850		1,932,794		450,558		5,006,486		5,457,044		1,718,328	1988	40 yrs.
6000 Commerce Parkway	Mt. Laurel, NJ		—		234,151		2,022,683		318,526		234,151		2,341,209		2,575,360		776,000	1985	40 yrs.
8000 Commerce Parkway	Mt. Laurel, NJ		—		234,814		1,995,098		539,621		234,814		2,534,719		2,769,533		872,377	1983	40 yrs.
9000 Commerce Parkway	Mt. Laurel, NJ		—		286,587		2,474,820		1,340,796		286,587		3,815,616		4,102,203		1,153,126	1983	40 yrs.
1000 Briggs Road	Mt. Laurel, NJ		—		288,577		2,546,537		564,777		288,577		3,111,314		3,399,891		1,091,545	1986	40 yrs.
1025 Briggs Road	Mt. Laurel, NJ		—		430,990		3,714,828		1,238,899		430,990		4,953,727		5,384,717		1,840,336	1987	40 yrs.
1020 Briggs Road	Mt. Laurel, NJ		—		494,334		—		3,137,988		569,184		3,063,139		3,632,322		1,190,427	1999	40 yrs.
2000 Crawford Place	Mt. Laurel, NJ		—		310,831		2,797,744		2,050,418		310,831		4,848,162		5,158,993		1,934,061	1986	40 yrs.
5000 Dearborn Court	Mt. Laurel, NJ		—		1,057,763		4,191,827		1,478,335		1,057,763		5,670,162		6,727,925		1,926,168	1988	40 yrs.
1001 Briggs Road	Mt. Laurel, NJ		—		701,705		3,505,652		1,961,528		701,705		5,467,180		6,168,886		2,265,945	1986	40 yrs.
1015 Briggs Road	Mt. Laurel, NJ		—		356,987		—		3,705,164		470,659		3,591,492		4,062,151		1,295,054	2000	40 yrs.
17000 Commerce Parkway	Mt. Laurel, NJ		—		144,515				3,428,278		144,515		3,428,278		3,572,793		1,076,681	2001	40 yrs.
27th Street	Oak Creek, WI		—		348,280		—		4,295,405		696,690		3,946,995		4,643,685		165,695	2007	40 yrs.
Corporate Preserve Drive	Oak Creek, WI		—		516,016		—		3,933,839		654,271		3,795,584		4,449,855		146,271	2007	40 yrs.
550-590 Hale Avenue	Oakdale, MN		—		765,535		3,488,754		303,570		766,390		3,791,469		4,557,859		1,070,168	1996	40 yrs.
1879 Lamont Avenue	Odenton, MD		—		1,976,000		8,099,579		2,469,160		2,011,030		10,533,709		12,544,739		1,834,637	2004	40 yrs.
350 Winmeyer Avenue	Odenton, MD		—		1,778,400		7,289,165		1,867,935		1,809,927		9,125,573		10,935,500		1,461,921	2004	40 yrs.
9600 Satellite Boulevard	Orlando, FL		*		252,850		1,297,923		62,116		252,850		1,360,039		1,612,889		476,769	1989	40 yrs.
9700 Satellite Boulevard	Orlando, FL		*		405,362		1,146,546		314,760		405,362		1,461,306		1,866,668		521,435	1989	40 yrs.
1902 Cypress Lake Drive	Orlando, FL		*		523,512		3,191,790		914,639		538,512		4,091,429		4,629,941		1,454,355	1989	40 yrs.
9550 Satellite Boulevard	Orlando, FL		—		574,831		—		2,349,259		587,319		2,336,771		2,924,090		766,292	1999	40 yrs.
10511 & 10611 Satellite Boulevard	Orlando, FL		—		517,554		2,568,186		398,922		522,991		2,961,671		3,484,662		1,021,663	1985	40 yrs.
1400-1440 Central Florida Parkway	Orlando, FL		*		518,043		2,561,938		764,155		518,043		3,326,093		3,844,136		1,052,279	1962	40 yrs.
2216 Directors Row	Orlando, FL		—		453,918		2,572,202		349,256		453,918		2,921,458		3,375,376		822,168	1998	40 yrs.
2400 South Lake Orange Drive	Orlando, FL		—		385,964		—		2,419,706		642,427		2,163,243		2,805,669		612,812	2001	40 yrs.
6923 Lee Vista Boulevard	Orlando, FL		—		903,701		—		3,791,927		830,953		3,864,675		4,695,628		479,492	2006	40 yrs.
6501 Lee Vista Boulevard	Orlando, FL		—		903,701				5,660,761		925,671		5,638,790		6,564,462		1,308,507	2001	40 yrs.
2416 Lake Orange Drive	Orlando, FL		—		535,964				2,867,281		704,800		2,698,444		3,403,244		786,401	2002	40 yrs.
10771 Palm Bay Drive	Orlando, FL		*		664,605				2,362,814		685,383		2,342,035		3,027,419		533,740	2001	40 yrs.
10003 Satellite Boulevard	Orlando, FL		—		680,312		2,120,754		1,219,087		680,312		3,339,841		4,020,152		750,364	2003	40 yrs.
1090 Gills Drive	Orlando, FL		*		878,320		2,558,833		1,400,491		878,320		3,959,324		4,837,644		732,654	2003	40 yrs.
2202 Taft-Vineland Road	Orlando, FL		—		—		—		6,631,110		1,283,713		5,347,397		6,631,110		1,579,677	2004	40 yrs.
South Center Land-Phase II	Orlando, FL		—		838,853		—		4,084,539		767,953		4,155,440		4,923,392		560,662	2006	40 yrs.
7315 Kingspointe Parkway	Orlando, FL		*		1,931,697		6,388,203		2,135,046		1,932,004		8,522,943		10,454,946		1,940,443	2004	40 yrs.
2351 Investors Row	Orlando, FL		*		2,261,924		7,496,249		411,516		2,263,211		7,906,478		10,169,689		1,211,038	2004	40 yrs.
2256 Taft-Vineland Road	Orlando, FL		—		467,296		—		2,494,666		825,673		2,136,290		2,961,963		373,172	2005	40 yrs.
1950 Summit Park Drive	Orlando, FL		—		2,573,700		17,478,646		2,068,083		2,583,667		19,536,762		22,120,429		2,931,860	2005	40 yrs.
1958 Summit Park Drive	Orlando, FL		—		2,573,961		11,206,937		9,676,795		2,583,216		20,874,477		23,457,693		2,841,547	2005	40 yrs.
6200 Lee Vista Boulevard	Orlando, FL		—		1,435,301		6,174,642		200,240		1,435,301		6,374,882		7,810,183		690,586	2006	40 yrs.
7022 TPC Drive	Orlando, FL		—		1,443,510		6,775,194		570,566		1,457,286		7,331,985		8,789,270		972,281	2006	40 yrs.
7100 TPC Drive	Orlando, FL		—		1,431,489		8,002,539		628,392		1,445,807		8,616,613		10,062,420		1,124,653	2006	40 yrs.
7101 TPC Drive	Orlando, FL		—		1,553,537		5,702,243		307,605		1,570,863		5,992,522		7,563,385		672,126	2006	40 yrs.
851 Gills Drive	Orlando, FL		—		332,992		—		2,644,112		373,500		2,603,604		2,977,104		173,781	2006	40 yrs.
950 Gills Drive	Orlando, FL		—		443,989		—		2,698,675		464,800		2,677,864		3,142,664		158,297	2006	40 yrs.
1000 Gills Drive	Orlando, FL		—		415,906		—		2,712,378		435,400		2,692,883		3,128,283		188,966	2006	40 yrs.
201 Summit Park Drive	Orlando, FL		—		4,435,921		—		38,355,529		4,510,990		38,280,461		42,791,450		664,651	2008	40 yrs.
8201 Chancellor Drive	Orlando, FL		—		4,295,972		15,564,905		2,966,361		4,295,972		18,531,266		22,827,239		287,908	2010	40 yrs.
8801 Tinicum Boulevard	Philadelphia, PA		—		2,474,031		—		43,774,779		125,087		46,123,723		46,248,810		18,205,132	1997	40 yrs.
3 Franklin Plaza	Philadelphia, PA		—		2,483,144		—		32,150,134		2,514,519		32,118,759		34,633,278		9,484,817	1999	40 yrs.
4751 League Island Boulevard	Philadelphia, PA		—		992,965		331,924		6,791,359		1,022,081		7,094,168		8,116,249		1,406,432	2003	40 yrs.
1 Crescent Drive	Philadelphia, PA		—		567,280		—		12,028,316		347,892		12,247,704		12,595,596		1,910,404	2004	40 yrs.
4775 League Island Boulevard	Philadelphia, PA		—		891,892		—		5,757,514		366,982		6,282,425		6,649,406		510,831	2006	40 yrs.
4300 South 26th Street	Philadelphia, PA		—		402,673		—		36,561,192		417,353		36,546,513		36,963,865		1,236,362	2008	40 yrs.
3 Crescent Drive	Philadelphia, PA		—		214,726		—		23,728,765		417,485		23,526,006		23,943,491		347,394	2008	40 yrs.
4410 E. Cotton Center Boulevard	Phoenix, AZ		—		4,758,484		10,559,563		5,587,577		4,765,172		16,140,451		20,905,624		1,419,862	2007	40 yrs.
4750 S. 44th Place	Phoenix, AZ		—		3,756,307		8,336,400		4,122,476		3,761,587		12,453,596		16,215,183		939,944	2007	40 yrs.
4435 E. Cotton Center Boulevard	Phoenix, AZ		—		1,910,584		1,954,020		2,166,648		1,911,045		4,120,208		6,031,253		492,458	2007	40 yrs.
4207 E. Cotton Center Boulevard	Phoenix, AZ		—		1,409,908		4,680,808		1,100,202		1,410,248		5,780,670		7,190,918		842,005	2007	40 yrs.
4217 E. Cotton Center Boulevard	Phoenix, AZ		—		7,922,480		10,045,599		2,755,567		6,690,321		14,033,325		20,723,646		1,520,748	2007	40 yrs.
4425 E. Cotton Center Boulvard	Phoenix, AZ		*		7,318,457		24,549,401		28,556		7,318,457		24,577,957		31,896,413		2,854,518	2007	40 yrs.
4415 E. Cotton Center Boulevard	Phoenix, AZ		*		1,749,957		3,667,748		7,388		1,749,957		3,675,136		5,425,093		459,476	2007	40 yrs.
4405 E. Cotton Center Boulevard	Phoenix, AZ		*		2,646,318		9,697,439		263,756		2,646,318		9,961,195		12,607,513		1,068,755	2007	40 yrs.
4313 E. Cotton Center Boulevard	Phoenix, AZ		*		3,895,539		16,724,283		1,401,488		3,895,539		18,125,772		22,021,311		2,163,300	2007	40 yrs.
4303 E. Cotton Center Boulvard	Phoenix, AZ		*		2,619,964		9,675,711		52,718		2,619,964		9,728,428		12,348,392		1,130,199	2007	40 yrs.
4610 South 44th Street	Phoenix, AZ		—		6,539,310		—		10,331,534		6,827,288		10,043,555		16,870,843		421,457	2007	40 yrs.
4550 South 44th Street	Phoenix, AZ		—		5,380,972		—		4,381,333		5,617,939		4,144,367		9,762,306		146,427	2007	40 yrs.
9801 80th Avenue	Pleasant Prairie, WI		—		1,692,077		7,934,794		250,974		1,689,726		8,188,119		9,877,845		2,478,190	1994	40 yrs.
2250 Hickory Road	Plymouth Meeting, PA		—		1,015,851		9,175,555		2,821,413		1,024,040		11,988,779		13,012,819		4,174,450	1985	40 yrs.
2905 Northwest Boulevard	Plymouth, MN		—		516,920		4,646,342		2,426,568		516,920		7,072,910		7,589,830		2,087,144	1983	40 yrs.
2800 Campus Drive	Plymouth, MN		—		395,366		3,554,512		918,212		395,366		4,472,724		4,868,090		1,692,190	1985	40 yrs.

78

LIBERTY PROPERTY TRUST
REAL ESTATE AND ACCUMULATED DEPRECIATION
AS OF DECEMBER 31, 2010

								Costs
								Capitalized										Date of
								Subsequent		Gross Amount Carried at End of Period						Accumulated		Construction	Depreciable
				Initial Cost				to		Land and		Building and		Total		Depreciation		or	life
Project	Location	Encumbrances		Land		Building		Acquisition		Improvements		Improvements		12/31/2010		12/31/10		Acquisition	(years)
OPERATING PROPERTIES
2955 Xenium Lane	Plymouth, MN		—		151,238		1,370,140		393,089		151,238		1,763,230		1,914,468		668,422	1985	40 yrs.
2920 Northwest Boulevard	Plymouth, MN		—		392,026		3,433,678		456,993		384,235		3,898,462		4,282,697		1,277,979	1997	40 yrs.
14630-14650 28th Avenue North	Plymouth, MN		—		198,205		1,793,422		615,305		198,205		2,408,726		2,606,931		918,230	1978	40 yrs.
9600 54th Avenue	Plymouth, MN		—		332,317		3,077,820		910,372		332,317		3,988,192		4,320,509		1,079,239	1998	40 yrs.
1500 SW 5th Court	Pompano Beach, FL		—		972,232		3,892,085		392,196		972,232		4,284,282		5,256,513		1,413,897	1957	40 yrs.
1651 SW 5th Court	Pompano Beach, FL		—		203,247		811,093		11,783		203,247		822,876		1,026,124		264,713	1990	40 yrs.
1601 SW 5th Court	Pompano Beach, FL		—		203,247		811,093		224,133		203,247		1,035,226		1,238,473		421,093	1990	40 yrs.
1501 SW 5th Court	Pompano Beach, FL		—		203,247		811,093		200,027		203,247		1,011,120		1,214,367		286,311	1990	40 yrs.
1400 SW 6th Court	Pompano Beach, FL		—		1,157,049		4,620,956		355,505		1,157,049		4,976,461		6,133,511		1,604,895	1986	40 yrs.
1405 SW 6th Court	Pompano Beach, FL		—		392,138		1,565,787		256,028		392,138		1,821,816		2,213,954		634,567	1985	40 yrs.
595 SW 13th Terrace	Pompano Beach, FL		—		359,933		1,437,116		621,873		359,933		2,058,989		2,418,922		580,887	1984	40 yrs.
601 SW 13th Terrace	Pompano Beach, FL		—		164,413		655,933		281,345		164,413		937,278		1,101,691		337,880	1984	40 yrs.
605 SW 16th Terrace	Pompano Beach, FL		—		310,778		1,238,324		239,517		310,178		1,478,441		1,788,619		551,735	1965	40 yrs.
301 Hill Carter Parkway	Richmond, VA		—		659,456		4,836,010		159,898		659,456		4,995,908		5,655,364		1,946,188	1989	40 yrs.
5600-5626 Eastport Boulevard	Richmond, VA		—		489,941		3,592,900		254,734		489,941		3,847,634		4,337,575		1,538,356	1989	40 yrs.
5650-5674 Eastport Boulevard	Richmond, VA		—		644,384		4,025,480		87,419		644,384		4,112,899		4,757,283		1,671,965	1990	40 yrs.
5700 Eastport Boulevard	Richmond, VA		—		408,729		2,697,348		676,233		408,729		3,373,581		3,782,310		1,404,256	1990	40 yrs.
4101-4127 Carolina Avenue	Richmond, VA		—		310,854		2,279,597		1,080,673		310,854		3,360,270		3,671,124		1,150,876	1973	40 yrs.
4201-4261 Carolina Avenue	Richmond, VA		—		693,203		5,083,493		1,642,146		693,203		6,725,639		7,418,842		2,598,221	1975	40 yrs.
4263-4299 Carolina Avenue	Richmond, VA		—		256,203		2,549,649		1,962,691		256,203		4,512,340		4,768,543		1,592,937	1976	40 yrs.
4301-4335 Carolina Avenue	Richmond, VA		—		223,696		1,640,435		2,756,533		223,696		4,396,968		4,620,664		1,431,051	1978	40 yrs.
4337-4379 Carolina Avenue	Richmond, VA		—		325,303		2,385,557		1,163,576		325,303		3,549,133		3,874,436		1,324,818	1979	40 yrs.
4501-4549 Carolina Avenue	Richmond, VA		—		486,166		3,565,211		427,390		486,166		3,992,601		4,478,767		1,532,683	1981	40 yrs.
4551-4593 Carolina Avenue	Richmond, VA		—		474,360		3,478,646		759,404		474,360		4,238,050		4,712,410		1,573,436	1982	40 yrs.
4601-4643 Carolina Avenue	Richmond, VA		—		652,455		4,784,675		555,531		652,455		5,340,206		5,992,661		2,228,217	1985	40 yrs.
4645-4683 Carolina Avenue	Richmond, VA		—		404,616		2,967,187		470,017		404,616		3,437,204		3,841,820		1,304,181	1985	40 yrs.
4447-4491 Carolina Avenue	Richmond, VA		—		454,056		2,729,742		362,531		454,056		3,092,273		3,546,329		1,233,787	1987	40 yrs.
4401-4445 Carolina Avenue	Richmond, VA		—		615,038		4,510,272		371,019		615,038		4,881,291		5,496,329		1,886,600	1988	40 yrs.
2300 East Parham Road	Richmond, VA		—		221,947		1,011,088		2,443		221,947		1,013,531		1,235,478		461,965	1988	40 yrs.
5601-5659 Eastport Boulevard	Richmond, VA		—		705,660		—		4,557,438		720,100		4,542,998		5,263,098		1,633,594	1996	40 yrs.
5900 Eastport Boulevard	Richmond, VA		—		676,661		—		4,822,774		687,898		4,811,537		5,499,435		1,771,709	1997	40 yrs.
4717-4729 Eubank Road	Richmond, VA		—		449,447		3,294,697		544,248		452,263		3,836,128		4,288,391		1,666,553	1978	40 yrs.
4263F-N. Carolina Avenue	Richmond, VA		—		91,476		—		1,653,510		91,599		1,653,387		1,744,986		599,151	1975	40 yrs.
510 Eastpark Court	Richmond, VA		—		261,961		2,110,874		427,164		262,210		2,537,789		2,799,999		938,249	1989	40 yrs.
520 Eastpark Court	Richmond, VA		—		486,118		4,083,582		263,481		486,598		4,346,583		4,833,181		1,582,609	1989	40 yrs.
5701-5799 Eastport Boulevard	Richmond, VA		—		694,644		—		5,394,868		700,503		5,389,009		6,089,512		1,814,497	1998	40 yrs.
530 Eastpark Court	Richmond, VA		—		266,883		—		2,527,958		334,772		2,460,069		2,794,841		862,072	1999	40 yrs.
6000 Eastport Blvd	Richmond, VA		—		872,901		—		7,486,258		901,666		7,457,493		8,359,159		512,626	1997	40 yrs.
3829-3855 Gaskins Road	Richmond, VA		—		364,165		3,264,114		44,174		364,165		3,308,289		3,672,454		1,064,042	1988	40 yrs.
10800 Nuckols Boulevard	Richmond, VA		—		1,432,462		—		14,420,839		1,794,162		14,059,139		15,853,301		3,834,586	2000	40 yrs.
100 Westgate Parkway	Richmond, VA		—		1,140,648		101,824		9,955,442		1,456,084		9,741,829		11,197,913		2,229,493	2001	40 yrs.
200 Westgate Parkway	Richmond, VA		—		1,623,612				6,355,516		1,072,797		6,906,331		7,979,128		1,750,023	2002	40 yrs.
3901 Westerre Parkway	Richmond, VA		—		634,231		—		12,273,725		1,492,295		11,415,662		12,907,956		495,001	2003	40 yrs.
3900 Westerre Parkway	Richmond, VA		—		392,184		—		11,655,841		1,083,836		10,964,189		12,048,025		1,575,800	2005	40 yrs.
1001 Boulders Parkway	Richmond, VA		—		2,073,739		5,634,796		1,601,236		2,079,643		7,230,128		9,309,770		1,290,955	2005	40 yrs.
7400 Beaufont Springs Drive	Richmond, VA		—		808,581		7,273,850		1,236,204		810,743		8,507,891		9,318,634		1,346,294	2005	40 yrs.
1100 Boulders Parkway	Richmond, VA		—		1,276,936		12,052,192		1,796,796		1,280,662		13,845,263		15,125,925		1,986,745	2005	40 yrs.
540 Eastpark Court	Richmond, VA		—		742,300		—		5,415,233		1,066,839		5,090,694		6,157,533		241,330	2007	40 yrs.
2020 US Highway 301 South	Riverview, FL		—		1,233,639		13,608,485		109,898		1,233,800		13,718,223		14,952,022		1,703,139	2006	40 yrs.
6532 Judge Adams Road	Rock Creek, NC		—		354,903		—		3,981,740		399,988		3,936,655		4,336,643		1,252,881	1997	40 yrs.
6530 Judge Adams Road	Rock Creek, NC		—		305,821		—		4,782,967		335,061		4,753,727		5,088,788		1,366,230	1999	40 yrs.
8501 East Raintree Drive	Scottsdale, AZ		—		4,076,412		—		27,621,159		4,115,137		27,582,434		31,697,571		4,218,935	2005	40 yrs.
Renaissance Blvd & Hwy 20	Sturtevant, WI		—		2,484,450		—		22,431,424		2,487,293		22,428,580		24,915,873		3,394,514	2006	40 yrs.
6950 Harbor View Blvd	Suffolk, VA		—		929,844		—		6,214,521		794,848		6,349,518		7,144,365		941,491	2004	40 yrs.
6900 Harbor View Boulevard	Suffolk, VA		—		904,052		—		8,570,545		807,006		8,667,592		9,474,597		826,201	2006	40 yrs.
13650 NW 8th Street	Sunrise, FL		—		558,223		2,171,930		1,134		558,251		2,173,036		2,731,287		726,873	1991	40 yrs.
13630 NW 8th Street	Sunrise, FL		—		659,797		2,596,275		128,733		659,825		2,724,979		3,384,804		860,712	1991	40 yrs.
1301 International Parkway	Sunrise, FL		—		5,100,162		24,219,956		8,030,931		5,100,791		32,250,258		37,351,049		3,459,852	2006	40 yrs.
13621 NW 12th Street	Sunrise, FL		—		5,570,820		9,454,900		2,334,581		5,570,821		11,789,479		17,360,300		1,739,700	2008	40 yrs.
5501-5519 Pioneer Park Boulevard	Tampa, FL		—		162,000		1,613,000		967,811		262,416		2,480,396		2,742,811		885,338	1981	40 yrs.
5690-5694 Crenshaw Street	Tampa, FL		—		181,923		1,812,496		223,143		181,923		2,035,639		2,217,562		775,833	1979	40 yrs.
3102,3104,3110 Cherry Palm Drive	Tampa, FL		—		503,767		2,787,585		1,201,051		503,767		3,988,636		4,492,403		1,693,949	1986	40 yrs.
8401-8408 Benjamin Road	Tampa, FL		—		789,651		4,454,648		1,794,502		769,789		6,269,011		7,038,801		2,571,492	1986	40 yrs.
111 Kelsey Lane	Tampa, FL		—		359,540		1,461,850		558,088		359,540		2,019,938		2,379,478		800,653	1990	40 yrs.
7930, 8010-20 Woodland Center Boulevard	Tampa, FL		*		1,408,478		5,247,246		1,164,667		1,408,478		6,411,914		7,820,391		2,417,151	1990	40 yrs.
7920 Woodland Center Boulevard	Tampa, FL		*		1,082,648		2,445,444		23,564		1,082,648		2,469,008		3,551,656		844,855	1997	40 yrs.
8154-8198 Woodland Center Boulevard	Tampa, FL		—		399,088		2,868,834		503,628		399,088		3,372,462		3,771,550		1,142,438	1988	40 yrs.
8112-42 Woodland Center Boulevard	Tampa, FL		—		513,263		3,230,239		649,273		513,263		3,879,513		4,392,775		1,395,842	1995	40 yrs.
8212 Woodland Center Boulevard	Tampa, FL		—		820,882		2,322,720		14,210		820,882		2,336,931		3,157,813		797,430	1996	40 yrs.
131 Kelsey Lane	Tampa, FL		—		511,463		—		4,437,886		559,527		4,389,822		4,949,349		2,237,137	1985	40 yrs.
7724 Woodland Center Boulevard	Tampa, FL		—		235,893		—		2,127,887		235,894		2,127,886		2,363,780		733,090	1998	40 yrs.
7802-50 Woodland Center Boulevard	Tampa, FL		—		357,364		—		2,625,403		506,949		2,475,818		2,982,767		775,850	1999	40 yrs.
7852-98 Woodland Center Boulevard	Tampa, FL		—		357,364		—		2,299,349		506,949		2,149,764		2,656,713		766,317	1999	40 yrs.

79

LIBERTY PROPERTY TRUST
REAL ESTATE AND ACCUMULATED DEPRECIATION
AS OF DECEMBER 31, 2010

								Costs
								Capitalized												Date of
								Subsequent		Gross Amount Carried at End of Period							Accumulated			Construction	Depreciable
				Initial Cost				to		Land and			Building and		Total		Depreciation			or	life
Project	Location	Encumbrances		Land		Building		Acquisition		Improvements			Improvements		12/31/2010		12/31/10			Acquisition	(years)
OPERATING PROPERTIES
8921 Brittany Way	Tampa, FL		—		224,369		1,063,882		987,258		254,493			2,021,015		2,275,509		683,092		1998	40 yrs.
5250 Eagle Trail Drive	Tampa, FL		—		952,860		—		3,457,917		952,860			3,457,917		4,410,776		1,059,272		1998	40 yrs.
7725 Woodland Center Boulevard	Tampa, FL		—		553,335		—		3,355,037		771,501			3,136,870		3,908,372		904,524		1999	40 yrs.
8001 Woodland Center Boulevard	Tampa, FL		—		350,406		—		2,365,836		438,061			2,278,182		2,716,243		649,571		1999	40 yrs.
4630 Woodland Corporate Boulevard	Tampa, FL		—		943,169		—		13,135,586		1,560,099			12,518,656		14,078,756		3,462,107		2000	40 yrs.
701-725 South US Hwy 301	Tampa, FL		—		419,683		—		3,284,227		661,680			3,042,230		3,703,910		1,020,300		2000	40 yrs.
4502 Woodland Corporate Boulevard	Tampa, FL		—		—		—		4,875,253		1,071,535			3,803,718		4,875,253		971,879		1999	40 yrs.
9001-9015 Brittany Way	Tampa, FL		—		209,841		—		1,795,733		364,514			1,641,060		2,005,574		449,464		2000	40 yrs.
4508 Woodland Corporate Boulevard	Tampa, FL		—		498,598		—		3,057,752		556,887			2,999,463		3,556,350		900,759		2000	40 yrs.
7622 Bald Cypress Place	Tampa, FL		—		—		—		1,305,584		300,000			1,005,584		1,305,584		278,758		2000	40 yrs.
901-933 US Highway 301 South	Tampa, FL		—		500,391				3,829,240		840,314			3,489,318		4,329,631		1,179,321		2001	40 yrs.
4503 Woodland Corporate Boulevard	Tampa, FL		—		—				3,496,413		619,913			2,876,500		3,496,413		728,005		2002	40 yrs.
4505 Woodland Corporate Boulevard	Tampa, FL		—		—				3,168,713		716,594			2,452,119		3,168,713		849,691		2002	40 yrs.
4511 Woodland Corporate Boulevard	Tampa, FL		—		—				2,740,686		686,594			2,054,092		2,740,686		538,101		2002	40 yrs.
7621 Bald Cypress Place (Bldg N)	Tampa, FL		—		—		—		1,482,613		447,498			1,035,115		1,482,613		246,794		2001	40 yrs.
4520 Seedling Circle	Tampa, FL		—		854,797		42,131		2,721,233		854,797			2,763,364		3,618,161		462,218		2003	40 yrs.
501 US Highway 301 South	Tampa, FL		—		898,884		—		3,498,107		900,508			3,496,483		4,396,991		933,216		2004	40 yrs.
9002-9036 Brittany Way	Tampa, FL		—		492,320		—		3,853,643		899,284			3,446,679		4,345,963		822,559		2004	40 yrs.
8900-34 Brittany Was	Tampa, FL		—		537,194		—		4,128,520		978,019			3,687,696		4,665,714		1,016,073		2005	40 yrs.
200-34 Kelsey Lane	Tampa, FL		—		330,097		—		3,321,485		933,362			2,718,220		3,651,582		344,220		2005	40 yrs.
910-926 Chad Lane	Tampa, FL		—		201,771		—		3,214,583		628,237			2,788,117		3,416,354		551,044		2006	40 yrs.
150-182 Kelsey Lane	Tampa, FL		—		403,541		—		5,545,710		1,181,609			4,767,643		5,949,251		1,261,054		2006	40 yrs.
8725 Henderson Road	Tampa, FL		—		3,167,787		19,126,318		314,323		3,167,958			19,440,471		22,608,428		3,265,960		2006	40 yrs.
8735 Henderson Road	Tampa, FL		—		3,166,130		18,735,573		1,163,921		3,166,300			19,899,324		23,065,624		3,350,709		2006	40 yrs.
8705 Henderson Road	Tampa, FL		—		4,303,870		23,688,409		259,947		4,304,102			23,948,125		28,252,227		4,280,801		2006	40 yrs.
8715 Henderson Road	Tampa, FL		—		3,343,910		18,325,599		290,389		3,344,090			18,615,808		21,959,898		2,777,918		2006	40 yrs.
8745 Henderson Road	Tampa, FL		—		2,050,439		11,173,008		472,341		2,050,548			11,645,240		13,695,788		1,876,288		2006	40 yrs.
4631 Woodland Corporate Blvd	Tampa, FL		—		1,453,367		—		13,350,228		1,908,792			12,894,803		14,803,595		646,405		2006	40 yrs.
7851-7861 Woodland Center Blvd	Tampa, FL		—		548,905		2,241,627		204,883		548,905			2,446,510		2,995,415		296,781		2006	40 yrs.
9306-24 East Broadway Avenue	Tampa, FL		—		450,440		—		3,303,369		486,004			3,267,805		3,753,809		221,846		2007	40 yrs.
8313 West Pierce Street	Tolleson, AZ		—		2,295,090		9,079,811		3,143,989		2,295,090			12,223,799		14,518,890		1,250,935		2007	40 yrs.
3701 Corporate Parkway	Upper Saucon, PA		—		1,078,674		—		10,817,575		901,968			10,994,281		11,896,250		1,567,502		2005	40 yrs.
2809 South Lynnhaven Road	Virginia Beach, VA		—		953,590		6,142,742		1,752,750		953,590			7,895,492		8,849,082		2,538,253		1987	40 yrs.
200 Golden Oak Court	Virginia Beach, VA		—		1,116,693		6,770,480		1,381,663		1,116,693			8,152,143		9,268,836		2,748,724		1988	40 yrs.
208 Golden Oak Court	Virginia Beach, VA		—		965,177		6,728,717		1,320,782		965,177			8,049,499		9,014,676		2,763,652		1989	40 yrs.
484 Viking Drive	Virginia Beach, VA		—		891,753		3,607,890		625,117		891,753			4,233,006		5,124,759		1,456,757		1987	40 yrs.
629 Phoenix Drive	Virginia Beach, VA		—		371,694		2,108,097		288,669		371,694			2,396,766		2,768,460		860,414		1996	40 yrs.
5700 Cleveland Street	Virginia Beach, VA		—		700,112		9,592,721		1,799,638		700,564			11,391,906		12,092,471		4,090,519		1989	40 yrs.
1457 Miller Store Road	Virginia Beach, VA		—		473,689		2,663,045		812,854		474,746			3,474,843		3,949,589		938,194		2003	40 yrs.
11020 West Plank Court	Wauwatosa, WI		—		464,246		2,681,255		16,000		464,246			2,697,254		3,161,501		732,324		1985	40 yrs.
825 Duportail Road	Wayne, PA		—		5,536,619		16,179,213		4,488,519		5,539,281			20,665,071		26,204,352		5,313,436		1979	40 yrs.
1500 Liberty Ridge	Wayne, PA		—		8,287,555				31,020,857		11,636,499			27,671,913		39,308,412		7,670,102		2002	40 yrs.
1200 Liberty Ridge Drive	Wayne, PA		—		6,215,667				8,301,339		5,223,660			9,293,346		14,517,006		2,887,330		2001	40 yrs.
11300-90 West Theodore Trecker Way	West Allis, WI		—		500,565		1,591,678		676,697		505,972			2,262,968		2,768,940		480,184		2005	40 yrs.
11548 West Theodore Trecker Way	West Allis, WI		—		660,068		4,640,578		87,815		663,766			4,724,696		5,388,462		657,868		2005	40 yrs.
11420 West Theodore Trecker Way	West Allis, WI		—		348,146		2,057,483		104,569		350,008			2,160,190		2,510,198		301,730		2005	40 yrs.
400-500 Brandywine Parkway	West Chester, PA		—		845,846		6,809,025		501,861		845,846			7,310,886		8,156,732		2,387,865		1988	40 yrs.
600 Brandywine Parkway	West Chester, PA		—		664,899		5,352,410		687,777		664,899			6,040,187		6,705,086		2,074,776		1988	40 yrs.
42 Kings Hill Avenue	West Malling, UK		—		—		—		17,836,902		4,237,510			13,599,392		17,836,902		1,278,079		2005	40 yrs.
Liberty Square Retail Blocks	West Malling, UK		—		559,590		5,113,902		3,448,222		1,122,488			7,999,225		9,121,714		1,135,075		2006	40 yrs.
1 Kings Hill Aveune	West Malling, UK		—		—		—		14,011,674		3,903,279			10,108,395		14,011,674		1,072,508		2006	40 yrs.
Liberty Square	West Malling, UK		—		—		—		—		—			—		—		(170	)	2006	40 yrs.
Liberty Property Trust UK	West Malling, UK		—		—		—		48,601		(39	)		48,640		48,601		—		2006	40 yrs.
3612 La Grange Parkway	Williamsburg, VA		—		—		—		5,722,994		887,234			4,835,761		5,722,994		778,225		2003	40 yrs.
7805 Hudson Road	Woodbury, MN		—		1,279,834				10,291,220		1,385,739			10,185,316		11,571,054		3,648,273		2002	40 yrs.
Subtotal Operating Real Estate		$	55,765,632	$	780,218,676	$	1,798,426,710	$	2,706,813,044	$	864,796,710		$	4,420,661,719	$	5,285,458,429	$	1,090,685,108

80

LIBERTY PROPERTY TRUST
REAL ESTATE AND ACCUMULATED DEPRECIATION
AS OF DECEMBER 31, 2010

								Costs
								Capitalized											Date of
								Subsequent			Gross Amount Carried at End of Period						Accumulated		Construction	Depreciable
				Initial Cost				to			Land and		Building and		Total		Depreciation		or	life
Project	Location	Encumbrances		Land		Building		Acquisition			Improvements		Improvements		12/31/2010		12/31/10		Acquisition	(years)
LAND HELD FOR DEVELOPMENT
Perryman Road Land	Aberdeen, MD	$	—	$	12,052,635	$	—	$	278,080		$	12,330,715	$	—	$	12,330,715	$	—	2005	N/A
2 Womack Drive Land	Annapolis, MD		—		5,796,667		—		13,676			5,810,344		—		5,810,344		—	2007	N/A
Boca Colannade Yamato Road	Boca Raton, FL		—		2,039,735		—		566,124			2,605,859		—		2,605,859		—	1998	N/A
12912 Virkler Drive Land	Charlotte, NC		—		208,646		—		—			208,647		—		208,647		—	2010	N/A
Flying Cloud Drive Land	Eden Pairie, MN		—		2,051,631		—		23,215			2,074,846		—		2,074,846		—	2007	N/A
Camelback 303 Business Center Land	Goodyear, AZ		—		16,857,556		—		3,165,230			20,022,786		—		20,022,786		—	2007	N/A
Pleasant Ridge Road Land	Greensboro, NC		—		564,535		—		2,896,157			3,460,692		—		3,460,692		—	2006	N/A
Southchase Business Park Land	Greenville, SC		—		1,308,325		—		713,086			2,021,411		—		2,021,411		—	1998	N/A
Caliber Ridge Ind. Park Land	Greer, SC		—		2,297,492		—		3,566,222			5,863,714		—		5,863,714		—	2007	N/A
Hunters Green Land	Hagerstown, MD		—		5,489,586		—		8,352,688			13,842,274		—		13,842,274		—	2006	N/A
Lakefront Plaza II Land	Hampton, VA		229,953		138,101		—		101,157			239,258		—		239,258		—	2001	N/A
Ridge Road Land	Hanover, MD		—		3,371,183		—		452,208			3,823,391		—		3,823,391		—	2008	N/A
Mendenhall Land	High Point, NC		—		1,756,230		—		836,909			2,593,140		—		2,593,140		—	1995	N/A
Piedmond Centre Land	High Point, NC		—		913,276		—		912,540			1,825,816		—		1,825,816		—	2006	N/A
Commonwealth Corporate Center Land	Horsham, PA		—		3,043,938		—		25,160			3,069,098		—		3,069,098		—	2005	N/A
Beltway 8 @Bammel Bus Park Land	Houston, TX		—		1,072,634		—		14,445			1,087,079		—		1,087,079		—	2007	N/A
Central Green Land — Tract 5	Houston, TX		—		3,492,547		—		570,173			4,062,720		—		4,062,720		—	2007	N/A
Greens Crossing Land	Houston, TX		—		2,476,892		—		30,320			2,507,213		—		2,507,213		—	2007	N/A
Rankin Road Land	Houston, TX		—		5,756,865		—		104,416			5,861,281		—		5,861,281		—	2007	N/A
Hollister Beltway 8 Land	Houston, TX		—		6,282,232		—		336,819			6,619,051		—		6,619,051		—	2008	N/A
Noxell Land	Hunt Valley, MD		—		2,040,690		—		1,173			2,041,863		—		2,041,863		—	2001	N/A
Liberty Business Park Land	Jacksonville, FL		—		456,269		—		82,690			538,959		—		538,959		—	1995	N/A
7024 AC Skinner Parkway	Jacksonville, FL		—		751,448		—		73,504			824,952		—		824,952		—	1995	N/A
Belfort Road	Jacksonville, FL		—		492,908		—		87,649			580,557		—		580,557		—	1998	N/A
Salisbury Road Land	Jacksonville, FL		—		1,402,337		—		216,467			1,618,804		—		1,618,804		—	2000	N/A
Skinner Land Parcel B	Jacksonville, FL		—		2,295,790		—		1,231,240			3,527,030		—		3,527,030		—	2005	N/A
Imeson Road Land	Jacksonville, FL		—		4,153,948		—		825,764			4,979,712		—		4,979,712		—	2008	N/A
Kent County, UK	Kent County, UK		—		—		—		—			6,023,565		—		6,023,565		—	1999	N/A
Commodore Business Park	Logan, NJ		—		792,118		—		1,139,214			1,931,332		—		1,931,332		—	1995	N/A
Quarry Ridge Land	Malvern, PA		—		4,774,994		—		4,961,903			9,736,897		—		9,736,897		—	2001	N/A
Park Place South Land	Milwaukee, WI		—		1,290,032		—		1,558,860			2,848,892		—		2,848,892		—	1999	N/A
Monarch Towne Center Land	Mirarar, FL		—		6,085,337		—		413,926			6,499,264		—		6,499,264		—	2006	N/A
South 27th Street Land	Oak Creek, WI		—		2,169,232		—		2,635,191			4,804,423		—		4,804,423		—	2006	N/A
Beachline Industrial Park Land	Orlando, FL		—		365,230		—		(0	)		365,230		—		365,230		—	2006	N/A
26th Street North Land	Philadelphia, PA		—		235,168		—		1,944,557			2,179,725		—		2,179,725		—	2009	N/A
Cotton Center Land	Phoenix, AZ		—		1,359,134		—		18,970,703			20,329,837		—		20,329,837		—	2007	N/A
Eastport VIII	Richmond, VA		—		382,698		—		3,325			386,023		—		386,023		—	1997	N/A
Eastport IX	Richmond, VA		—		211,627		—		3,325			214,952		—		214,952		—	1997	N/A
Woodlands Center Land	Sandston, VA		—		148,314		—		21,717			170,031		—		170,031		—	1996	N/A
Northsight Land	Scottsdale, AZ		—		6,176,464		—		2,204,597			8,381,061		—		8,381,061		—	2005	N/A
Old Scotland Road Land	Shippensburg, PA		—		8,322,686		—		3,010,371			11,333,058		—		11,333,058		—	2007	N/A
Bridgeway II Land	Suffolk, VA		—		603,391		—		2,023,007			2,626,399		—		2,626,399		—	2005	N/A
Suffolk Land	Suffolk, VA		—		2,715,714		—		695,846			3,411,560		—		3,411,560		—	2006	N/A
6119 W. Linebaugh Avenue	Tampa, FL		—		180,136		—		30,500			210,635		—		210,635		—	2000	N/A
Tampa Triangle Land	Tampa, FL		—		10,358,826		—		1,183,339			11,542,165		—		11,542,165		—	2006	N/A
Renaissance Park Land	Tampa, FL		—		1,995,375		—		219,098			2,214,473		—		2,214,473		—	2007	N/A
Subtotal Land Held for Development		$	229,953	$	42,338,181	$	—	$	16,159,688		$	209,250,733	$	—	$	209,250,733	$	—
Total All Properties		$	55,995,585	$	822,556,856	$	1,798,426,710	$	2,722,972,732		$	1,074,047,443	$	4,420,661,719	$	5,494,709,162	$	1,090,685,108

* Denotes property is collateralized under mortgages with Metropolitan Life, LaSalle Bank, Allianz, John Hancock and Mutual of Omaha totaling $264.3 million.

81

SCHEDULE III

LIBERTY PROPERTY TRUST
REAL ESTATE AND ACCUMULATED DEPRECIATION
(In thousands)

A summary of activity for real estate and accumulated depreciation is as follows:

	Year Ended December 31,
	2010			2009			2008
REAL ESTATE:
Balance at beginning of year	$	5,417,585		$	5,332,122		$	5,584,173
Additions		123,693			155,797			311,442
Disposition of property		(46,566	)		(70,334	)		(563,493	)
Balance at end of year	$	5,494,712		$	5,417,585		$	5,332,122
ACCUMULATED DEPRECIATION:
Balance at beginning of year	$	970,935		$	852,425		$	744,691
Depreciation expense		147,299			144,548			147,243
Disposition of property		(27,549	)		(26,038	)		(39,509	)
Balance at end of year	$	1,090,685		$	970,935		$	852,425

82

Management’s Annual Report on Internal Control Over Financial Reporting

The Company’s management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rules 13a—15 (f) and 15d—15(f). The Company’s internal control system was designed to provide reasonable assurance to the Company’s management regarding the preparation and fair presentation of published financial statements.

Under the supervision and with the participation of our management, including the Chief Executive Officer and Chief Financial Officer, we assessed the effectiveness of the Company’s internal control over financial reporting as of December 31, 2010. In making this assessment, we used the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commissions (COSO) in Internal Control — Integrated Framework. Based on our assessment we believe that, as of December 31, 2010, the Company’s internal control over financial reporting is effective based on those criteria.

The Company’s independent registered public accounting firm, Ernst & Young LLP, has issued an attestation report on the Company’s internal controls over financial reporting, which is included in this Annual Report on Form 10-K.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

83

Report of Independent Registered Public Accounting Firm

The Partners of Liberty Property Limited Partnership

We have audited Liberty Property Limited Partnership’s (the “Operating Partnership”) internal control over financial reporting as of December 31, 2010, based on criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (the COSO criteria). The Operating Partnership’s management is responsible for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting included in the accompanying Management’s Annual Report on Internal Control Over Financial Reporting. Our responsibility is to express an opinion on the Operating Partnership’s internal control over financial reporting based on our audit.

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

In our opinion, Liberty Property Limited Partnership maintained, in all material respects, effective internal control over financial reporting as of December 31, 2010, based on the COSO criteria.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheets as of December 31, 2010 and 2009, and the related consolidated statements of operations, owners’ equity, and cash flows for each of the three years in the period ended December 31, 2010 of Liberty Property Limited Partnership and our report dated February 25, 2011 expressed an unqualified opinion thereon.

/s/ Ernst & Young LLP

Philadelphia, Pennsylvania
February 25, 2011

84

Report of Independent Registered Public Accounting Firm

The Partners of Liberty Property Limited Partnership

We have audited the accompanying consolidated balance sheets of Liberty Property Limited Partnership (the “Operating Partnership”) as of December 31, 2010 and 2009, and the related consolidated statements of operations, owners’ equity, and cash flows for each of the three years in the period ended December 31, 2010. Our audits also included the financial statement schedule listed in the Index at Item 15. These financial statements and schedule are the responsibility of the Operating Partnership’s management. Our responsibility is to express an opinion on these financial statements and schedule based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly, in all material respects, the consolidated financial position of Liberty Property Limited Partnership at December 31, 2010 and 2009, and the consolidated results of its operations and its cash flows for each of the three years in the period ended December 31, 2010, in conformity with U.S. generally accepted accounting principles. Also, in our opinion, the related financial statement schedule, when considered in relation to the financial statements taken as a whole, presents fairly in all material respects the information set forth therein.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), Liberty Property Limited Partnership’s internal control over financial reporting as of December 31, 2010, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated February 25, 2011 expressed an unqualified opinion thereon.

/s/ Ernst & Young LLP

Philadelphia, Pennsylvania
February 25, 2011

85

CONDENSED CONSOLIDATED BALANCE SHEETS OF
LIBERTY PROPERTY LIMITED PARTNERSHIP
(In thousands, except unit amounts)

	December 31,
	2010			2009
ASSETS
Real estate:
Land and land improvements	$	864,797		$	848,988
Building and improvements		4,420,662			4,283,250
Less accumulated depreciation		(1,090,685	)		(970,935	)
Operating real estate		4,194,774			4,161,303
Development in progress		—			66,714
Land held for development		209,253			218,633
Net real estate		4,404,027			4,446,650
Cash and cash equivalents		108,409			237,446
Restricted cash		49,526			42,232
Accounts receivable		6,898			6,057
Deferred rent receivable		108,933			95,527
Deferred financing and leasing costs, net		141,464			134,309
Investments in and advances to unconsolidated joint ventures		171,916			175,584
Assets held for sale		—			5,564
Prepaid expenses and other assets		71,660			85,574
Total assets	$	5,062,833		$	5,228,943
LIABILITIES
Mortgage loans	$	320,679		$	473,993
Unsecured notes		2,039,143			1,842,882
Credit facility		—			140,000
Accounts payable		23,652			31,195
Accrued interest		29,821			31,251
Distributions payable		56,149			55,402
Other liabilities		154,837			171,051
Total liabilities		2,624,281			2,745,774
OWNERS’ EQUITY
General partner’s equity — common units, 115,530,608 and 113,875,211 units outstanding as of December 31, 2010 and 2009, respectively		2,082,186			2,122,295
Limited partners’ equity — 3,928,733 and 4,011,354 common units outstanding as of December 31, 2010 and 2009, respectively		67,621			72,294
— 9,740,000 preferred units outstanding as of December 31, 2010 and 2009		287,959			287,959
Noncontrolling interest — consolidated joint ventures		786			621
Total owners’ equity		2,438,552			2,483,169
Total liabilities and owners’ equity	$	5,062,833		$	5,228,943

See accompanying notes.

86

CONSOLIDATED STATEMENTS OF OPERATIONS OF
LIBERTY PROPERTY LIMITED PARTNERSHIP
(IN THOUSANDS, EXCEPT PER UNIT AMOUNTS)

	Year Ended December 31,
	2010			2009			2008
OPERATING REVENUE
Rental	$	522,263		$	516,538		$	503,611
Operating expense reimbursement		224,567			222,841			221,840
Total operating revenue		746,830			739,379			725,451
OPERATING EXPENSE
Rental property		155,294			148,392			147,479
Real estate taxes		85,139			85,968			83,047
General and administrative		52,850			51,237			54,462
Depreciation and amortization		173,402			169,818			168,148
Total operating expenses		466,685			455,415			453,136
Operating income		280,145			283,964			272,315
OTHER INCOME (EXPENSE)
Interest and other income		10,039			11,472			13,404
Debt extinguishment gain		—			1,547			2,521
Interest expense		(149,320	)		(148,902	)		(152,184	)
Total other income (expense)		(139,281	)		(135,883	)		(136,259	)
Income before property dispositions, income taxes, equity in earnings of unconsolidated joint ventures and impairment charges		140,864			148,081			136,056
Gain on property dispositions		4,616			1,687			10,572
Income taxes		(1,736	)		(494	)		(1,645	)
Equity in earnings of unconsolidated joint ventures		2,296			2,161			2,805
Impairment charges — investment in unconsolidated joint ventures and other		(378	)		(82,552	)		—
— goodwill		—			(15,700	)		—
Income from continuing operations		145,662			53,183			147,788
Discontinued operations (including net gain on property dispositions of $6,857, $17,859 and $23,519 for the years ended December 31, 2010, 2009 and 2008, respectively)		7,713			25,809			32,318
Net income		153,375			78,992			180,106
Noncontrolling interest-consolidated joint venture		(165	)		509			(483	)
Preferred unit distributions		(21,012	)		(21,012	)		(21,012	)
Net income available to common unitholders	$	132,198		$	58,489		$	158,611
Earnings per common unit
Basic:
Income from continuing operations	$	1.06		$	0.29		$	1.29
Income from discontinued operations		0.07			0.23			0.33
Income per common unit — basic	$	1.13		$	0.52		$	1.62
Diluted:
Income from continuing operations	$	1.05		$	0.29		$	1.29
Income from discontinued operations		0.07			0.23			0.33
Income per common unit — diluted	$	1.12		$	0.52		$	1.62
Weighted average number of common units outstanding
Basic		116,871			111,568			97,805
Diluted		117,553			112,020			97,994
Net income allocated to general partners	$	127,762		$	56,376		$	151,942
Net income allocated to limited partners		25,448			23,125			27,681

See accompanying notes.

87

CONSOLIDATED STATEMENTS OF OWNERS’ EQUITY OF
LIBERTY PROPERTY LIMITED PARTNERSHIP
(IN THOUSANDS)

				Limited			Limited
				Partners’			Partners’			Noncontrolling
	General			Equity -			Equity -			Interest -
	Partner’s			Common			Preferred			Consolidated
	Equity			Units			Units			Joint Ventures			Total Equity
Balance at January 1, 2008 (see note 8)	$	1,800,452		$	—		$	—		$	517		$	1,800,969
Contributions from partners		215,375			—			—			—			215,375
Distributions to partners		(221,023	)		—			—			130			(220,893	)
Foreign currency translation adjustment		(26,756	)		—			—			—			(26,756	)
Net income (does not include $27,681 related to limited partners’ equity)		151,942			—			—			483			152,425
Redemption of limited partners common units for common shares		24,396			—			—			—			24,396
Balance at December 31, 2008 (see note 8)		1,944,386			—			—			1,130			1,945.516
Transfer of noncontrolling interests to permanent equity		—			93,031			287,959			—			380,990
Contributions from partners		306,763			—			—			—			306,763
Distributions to partners		(208,566	)		(7,513	)		(21,012	)		—			(237,091	)
Foreign currency translation adjustment		7,717			282			—			—			7,999
Net income		56,376			2,113			21,012			(509	)		78,992
Redemption of limited partners common units for common shares		15,619			(15,619	)		—			—			—
Balance at December 31, 2009		2,122,295			72,294			287,959			621			2,483,169
Contributions from partners		49,011			—			—			—			49,011
Distributions to partners		(215,868	)		(7,541	)		(21,012	)		—			(244,421	)
Foreign currency translation adjustment		(2,494	)		(88	)		—			—			(2,582	)
Net income		127,762			4,436			21,012			165			153,375
Redemption of limited partners common units for common shares		1,480			(1,480	)		—			—			—
Balance at December 31, 2010	$	2,082,186		$	67,621		$	287,959		$	786		$	2,438,552

See accompanying notes.

88

CONSOLIDATED STATEMENTS OF CASH FLOWS OF
LIBERTY PROPERTY LIMITED PARTNERSHIP
(IN THOUSANDS)

	Year Ended December 31,
	2010			2009			2008
OPERATING ACTIVITIES
Net income	$	153,375		$	78,992		$	180,106
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		174,013			172,575			175,236
Amortization of deferred financing costs		6,339			5,101			4,429
Impairment charges — investment in unconsolidated joint ventures and other		957			104,156			3,076
Debt extinguishment gain		—			(1,547	)		(2,521	)
Equity in earnings of unconsolidated joint ventures		(2,296	)		(2,161	)		(2,805	)
Distributions from unconsolidated joint ventures		657			663			1,660
Gain on property dispositions		(12,052	)		(25,450	)		(37,167	)
Noncash compensation		11,595			12,905			9,152
Changes in operating assets and liabilities:
Restricted cash		(7,294	)		(1,189	)		(10,903	)
Accounts receivable		4,059			4,191			(264	)
Deferred rent receivable		(13,581	)		(13,414	)		(13,482	)
Prepaid expenses and other assets		(7,597	)		3,699			(35,189	)
Accounts payable		(7,399	)		(1,099	)		(10,913	)
Accrued interest		(1,430	)		(5,223	)		(3,251	)
Other liabilities		(389	)		(29,338	)		4,821
Net cash provided by operating activities		298,957			302,861			261,985
INVESTING ACTIVITIES
Investment in properties		(123,839	)		(58,871	)		(55,273	)
Investments in and advances to unconsolidated joint ventures		(1,870	)		(5,132	)		(8,410	)
Distributions from unconsolidated joint ventures		6,776			20,721			66,660
Net proceeds from disposition of properties/land		35,934			190,534			378,943
Net proceeds from (advances on) grant receivable/escrow		18,917			(23,238	)		9,875
Investment in development in progress		(9,265	)		(75,246	)		(253,835	)
Increase in land held for development		(6,086	)		(29,391	)		(47,906	)
Increase in deferred leasing costs		(30,721	)		(29,369	)		(33,537	)
Net cash (used in) provided by investing activities		(110,154	)		(9,992	)		56,517
FINANCING ACTIVITIES
Proceeds from unsecured notes		366,000			—			—
Repayment of unsecured notes		(169,739	)		(287,179	)		(20,872	)
Proceeds from mortgage loans		743			330,250			2,667
Repayments of mortgage loans		(156,890	)		(54,864	)		(46,452	)
Proceeds from credit facility		338,500			199,150			572,300
Repayments on credit facility		(478,500	)		(319,150	)		(782,300	)
Increase in deferred financing costs		(9,697	)		(5,550	)		(33	)
Capital contributions		37,434			293,814			206,349
Distributions to partners		(243,693	)		(230,504	)		(262,973	)
Net cash used in financing activities		(315,842	)		(74,033	)		(331,314	)
(Decrease) increase in cash and cash equivalents		(127,039	)		218,836			(12,812	)
(Decrease) increase in cash and cash equivalents related to foreign currency translation		(1,998	)		2,816			(9,383	)
Cash and cash equivalents at beginning of year		237,446			15,794			37,989
Cash and cash equivalents at end of year	$	108,409		$	237,446		$	15,794

See accompanying notes.

89

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS OF
LIBERTY PROPERTY LIMITED PARTNERSHIP

1. ORGANIZATION

Liberty Property Trust (the “Trust”) is a self-administered and self-managed Maryland real estate investment trust (a “REIT”). Substantially all of the Trust’s assets are owned directly or indirectly, and substantially all of the Trust’s operations are conducted directly or indirectly, by its subsidiary, Liberty Property Limited Partnership, a Pennsylvania limited partnership (the “Operating Partnership” and, together with the Trust and their consolidated subsidiaries, the “Company”). The Trust is the sole general partner and also a limited partner of the Operating Partnership, owning 96.7% of the common equity of the Operating Partnership at December 31, 2010. The Company provides leasing, property management, development, acquisition, and other tenant-related services for a portfolio of industrial and office properties which are located principally within the Mid-Atlantic, Southeastern, Midwestern and Southwestern United States and the United Kingdom.

All square footage amounts are unaudited.

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Use of Estimates

The preparation of financial statements in conformity with U.S. generally accepted accounting principles (“US GAAP”) requires management to make estimates and assumptions that affect amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.

Principles of Consolidation

The consolidated financial statements of the Company include the Operating Partnership and wholly owned subsidiaries and those subsidiaries in which the Company owns a majority voting interest with the ability to control operations of the subsidiaries and where no approval, veto or other important rights have been granted to the noncontrolling unitholders. All significant intercompany transactions and accounts have been eliminated.

Reclassifications

Certain amounts from prior years have been reclassified to conform to current-year presentation.

Real Estate and Depreciation

The properties are recorded at cost and are depreciated using the straight line method over their estimated useful lives. The estimated lives are as follows:

Building and Improvements	40 years (blended)
Capital improvements	15 — 20 years
Equipment	5 — 10 years
Tenant improvements	Term of the related lease

Expenditures directly related to the acquisition or improvement of real estate, including interest and other costs capitalized during development, are included in net real estate and are stated at cost. The capitalized costs include pre-construction costs essential to the development of the property, development and construction costs, interest costs, real estate taxes, development-related salaries and other costs incurred during the period of development. In accordance with Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 805, “Business Combinations” (“ASC 805”), effective January 1, 2009, certain acquisition-related costs are expensed as incurred. Expenditures for maintenance and repairs are charged to operations as incurred.

In accordance with ASC 805, the Company allocates the purchase price of real estate acquired to land, building and improvements and intangibles based on the relative fair value of each component. The value ascribed to in-place leases is based on the rental rates for the existing leases compared to market rent for leases of similar terms and present valuing the difference based on market interest rates. Origination values are also assigned to in-place leases, and, where appropriate, value is assigned to customer relationships. The Company depreciates the amounts allocated to building and improvements over 40 years and the amounts allocated to intangibles relating to in-place leases, which are included in deferred financing and leasing costs and other liabilities in the accompanying consolidated balance sheets, over the remaining term of the related leases.

90

Once a property is designated as held for sale, no further depreciation expense is recorded. Operations for properties identified as held for sale and/or sold where no continuing involvement exists are presented in discontinued operations for all periods presented.

The Company evaluates its real estate investments upon occurrence of a significant adverse change in its operations to assess whether any impairment indicators are present that affect the recovery of the recorded value. If any real estate investment is considered impaired, a loss is recognized to reduce the carrying value of the property to its estimated fair value.

Investments in Unconsolidated Joint Ventures

The Company accounts for its investments in unconsolidated joint ventures using the equity method of accounting as the Company exercises significant influence, but does not control these entities. Under the equity method of accounting, the net equity investment of the Company is reflected in the accompanying consolidated balance sheets and the Company’s share of net income from the joint ventures is included in the accompanying consolidated statements of operations.

On a periodic basis, management assesses whether there are any indicators that the value of the Company’s investments in unconsolidated joint ventures may be impaired. An investment is impaired only if management’s estimate of the value of the investment is less than the carrying value of the investment, and such decline in value is deemed to be other than temporary. To the extent impairment has occurred, the loss is measured as the excess of the carrying amount of the investment over the estimated fair value of the investment. The estimated fair value of the investments is determined using a discounted cash flow model which is a Level III valuation under FASB ASC 820, “Fair Value Measurements and Disclosures.” The Company considers a number of assumptions that are subject to economic and market uncertainties including, among others, demand for space, competition for tenants, changes in market rental rates, operating costs, capitalization rates, holding periods and discount rates. As these factors are difficult to predict and are subject to future events that may alter management’s assumptions, the values estimated by management in its impairment analyses may not be realized.

During the year ended December 31, 2009, the Company recognized impairment charges related to the decline in the fair values below the carrying values of certain of the Company’s investments in unconsolidated joint ventures. The Company considered the decline in fair value below the carrying value of $78.8 million to be other-than-temporary. The investment in unconsolidated joint ventures was impaired for the following segments as of December 31, 2009 (in thousands):

	Impairment
Segment	Amount
Midwest	$	6,963
Philadelphia/D.C.		64,060
United Kingdom		7,779
Total	$	78,802

No impairment losses on unconsolidated joint ventures were recognized during the years ended December 31, 2010 or 2008.

Cash and Cash Equivalents

Highly liquid investments with a maturity of three months or less when purchased are classified as cash equivalents.

Restricted Cash

Restricted cash includes tenant security deposits and escrow funds that the Company maintains pursuant to certain mortgage loans. Restricted cash also includes the undistributed proceeds from the sale of residential land in Kent County, United Kingdom.

91

Accounts Receivable/Deferred Rent Receivable

The Company’s accounts receivable are comprised of rents and charges for property operating costs due from tenants. The Company’s deferred rent receivable represents the cumulative difference between rent revenue recognized on a straight line basis and contractual payments due under the terms of tenant leases. The Company periodically performs a detailed review of amounts due from tenants to determine if accounts receivable and deferred rent receivable balances are collectible. Based on this review, accounts receivable and deferred rent receivable are reduced by an allowance for doubtful accounts. The Company considers tenant credit quality and payment history and general economic conditions in determining the allowance for doubtful accounts. If the accounts receivable balance or the deferred rent receivable balance is subsequently deemed uncollectible, the receivable and allowance for doubtful account balance are written off.

A significant tenant has entered into a forbearance agreement with the Company. The forbearance agreement provides for the deferral of the tenant's monthly obligation of $467,000 for the period from December 1, 2010 through June 30, 2011. The Company has reviewed its situation with this tenant and based upon this review and the review of its other tenants, provisions are established, and an allowance for doubtful accounts for estimated losses resulting from the inability of its tenants to make required rental payments is maintained.

The allowance for doubtful accounts at December 31, 2010 and 2009 was $11.3 million and $11.1 million, respectively. The Company’s bad debt expense for the years ended December 31, 2010, 2009 and 2008 was $3.9 million, $4.3 million and $4.8 million, respectively.

Goodwill

Goodwill represents the amounts paid in excess of the fair value of the net assets acquired in connection with the acquisition of Republic Property Trust in October 2007. Pursuant to FASB ASC 350, “Intangible — Goodwill and Other” (“ASC 350”), goodwill is not amortized to expense but rather is analyzed for impairment. In conjunction with the purchase of Republic Property Trust, goodwill and other intangibles of $15.7 million were recorded. The goodwill was assigned to the Northern Virginia/Washington, D.C. operation (“reporting unit”) which is part of the Philadelphia/D.C. reportable segment and was included in prepaid expenses and other assets on the Company’s consolidated balance sheets. The Company assessed goodwill for impairment annually in November and in interim periods if certain events occurred indicating the carrying value may be impaired. The Company performed its analysis for potential impairment of goodwill in accordance with ASC 350, which requires that a two-step impairment test be performed on goodwill. In the first step, the fair value of the reporting unit is compared to its carrying value. The estimated fair value of the reporting unit is determined using a discounted cash flow model which considers a number of assumptions that are subject to economic and market uncertainties including, among others, demand for space, competition for tenants, changes in market rental rates, and operating costs. If the fair value exceeds its carrying value, goodwill is not impaired, and no further testing is required. If the carrying value of the reporting unit exceeds its fair value, then a second step must be performed in order to determine the implied fair value of the goodwill and compare it to the carrying value of the goodwill. If the carrying value of goodwill exceeds its implied fair value then an impairment loss is recorded equal to the difference. An impairment loss of $15.7 million was recognized during the year ended December 31, 2009 and there is no longer any goodwill in the Company’s consolidated balance sheets. No impairment loss related to goodwill was recognized during the year ended December 31, 2008.

Revenues

The Company earns rental income under operating leases with tenants. Rental income is recognized on a straight line basis over the applicable lease term. Operating expense reimbursements consisting of amounts due from tenants for real estate taxes, utilities and other recoverable costs are recognized as revenue in the period in which the corresponding expenses are incurred.

Termination fees (included in rental revenue) are fees that the Company has agreed to accept in consideration for permitting certain tenants to terminate their lease prior to the contractual expiration date. The Company recognizes termination fees in accordance with Securities and Exchange Commission Staff Accounting Bulletin 104, “Revenue Recognition,” when the following conditions are met:

a)	the termination agreement is executed,
b)	the termination fee is determinable,
c)	all landlord services pursuant to the terminated lease have been rendered, and
d)	collectability of the termination fee is assured.

92

Deferred Financing and Leasing Costs

Costs incurred in connection with financing or leasing are capitalized and amortized on a straight line basis over the term of the related loan or lease. Deferred financing cost amortization is reported as interest expense. Intangible assets related to acquired in-place leases are amortized over the terms of the related leases.

Costs Incurred for Preferred Unit Issuance

Costs incurred in connection with the Company’s preferred unit issuances are reflected as a reduction of Limited partner’s equity — preferred units.

Income per Common Unit

The following table sets forth the computation of basic and diluted income per common unit (in thousands, except per unit amounts):

	2010							2009
				Weighted							Weighted
				Average							Average
	Income			Units		Per		Income			Units		Per
	(Numerator)			(Denominator)		Unit		(Numerator)			(Denominator)		Unit
Income from continuing operations net of noncontrolling interest	$	145,497						$	53,692
Less: Preferred unit distributions		(21,012	)						(21,012	)
Basic income from continuing operations
Income from continuing operations available to common unitholders		124,485			116,871	$	1.06		32,680			111,568	$	0.29
Dilutive units for long-term compensation plans		—			682				—			452
Diluted income from continuing operations
Income from continuing operations available to common unitholders and assumed conversions		124,485			117,553	$	1.05		32,680			112,020	$	0.29
Basic income from discontinued operations
Discontinued operations		7,713			116,871	$	0.07		25,809			111,568	$	0.23
Dilutive units for long-term compensation plans		—			682				—			452
Diluted income from discontinued operations
Discontinued operations		7,713			117,553	$	0.07		25,809			112,020	$	0.23
Basic income per common unit
Income available to common unitholders		132,198			116,871	$	1.13		58,489			111,568	$	0.52
Dilutive units for long-term compensation plans		—			682				—			452
Diluted income per common unit
Income available to common unitholders and assumed conversions	$	132,198			117,553	$	1.12	$	58,489			112,020	$	0.52

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	2008
				Weighted
				Average
	Income			Units		Per
	(Numerator)			(Denominator)		Unit
Income from continuing operations net of noncontrolling interest	$	147,305
Less: Preferred unit distributions		(21,012	)
Basic income from continuing operations
Income from continuing operations available to common unitholders		126,293			97,805	$	1.29
Dilutive units for long-term compensation plans		—			189
Diluted income from continuing operations
Income from continuing operations available to common unitholders and assumed conversions		126,293			97,994	$	1.29
Basic income from discontinued operations
Discontinued operations		32,318			97,805	$	0.33
Dilutive units for long-term compensation plans		—			189
Diluted income from discontinued operations
Discontinued operations		32,318			97,994	$	0.33
Basic income per common unit
Income available to common unitholders		158,611			97,805	$	1.62
Dilutive units for long-term compensation plans		—			189
Diluted income per common unit
Income available to common unitholders and assumed conversions	$	158,611			97,994	$	1.62

Dilutive units for long-term compensation plans represent the vested and unvested common units outstanding during the year as well as the dilutive effect of outstanding options. The anti-dilutive options that were excluded from the computation of diluted income per common unit in 2010, 2009 and 2008 were 1,433,000, 2,661,000 and 1,145,000, respectively.

During the year ended December 31, 2010, 315,000 common units were issued upon the exercise of options.

During the year ended December 31, 2010, individuals acquired 83,000 general partner’s equity - common units in exchange for the same number of limited partners’ equity — common units. These individuals acquired these limited partners’ equity — common units in connection with their contributions to the Operating Partnership of certain assets. The exchange of general partner’s equity — common units for the limited partners’ equity — common units is exempt from the registration requirement of the Securities Act of 1933, as amended, pursuant to Section 4(2) thereunder.

Fair Value of Financial Instruments

The carrying value of cash and cash equivalents, restricted cash, accounts receivable, accounts payable, accrued interest, distributions payable and other liabilities are reasonable estimates of fair values because of the short-term nature of these instruments. The fair value of the Company’s long-term debt, which is based on estimates by management and on rates quoted on December 31, 2010 for comparable loans, is greater than the aggregate carrying value by approximately $189.0 million at December 31, 2010.

Income Taxes

In conformity with the Internal Revenue Code and applicable state and local tax statutes, taxable income or loss of the Operating Partnership is required to be reported in the tax returns of the partners in accordance with the terms of the Partnership Agreement. However, the Company is taxed in certain states, the United Kingdom and Luxembourg. Accordingly, the Company has recognized federal, state, local and foreign taxes in accordance with US GAAP, as applicable.

94

There are no uncertain tax positions or possibly significant unrecognized tax benefits that are reasonably expected to occur within the next 12 months. The Company’s policy is to recognize interest accrued related to unrecognized benefits in interest expense and penalties in other expense. There are no interest or penalties deducted in the current period and no interest and penalties accrued at December 31, 2010 and December 31, 2009.

Certain of the Company’s taxable REIT subsidiaries have net operating loss carryforwards available of approximately $18.7 million. These carryforwards begin to expire in 2018. The Company has considered estimated future taxable income and has determined that a valuation allowance for the full carrying value of net operating loss carryforwards is appropriate.

The Company and its subsidiaries file income tax returns in the U.S. federal jurisdiction, certain state and local jurisdictions, the United Kingdom and Luxembourg. With few exceptions, the Company is no longer subject to U.S. federal, state, and local, or United Kingdom and Luxembourg examinations by tax authorities for years before 2007.

The Federal tax cost basis of the real estate at December 31, 2010 was $5.6 billion and at December 31, 2009 was $5.4 billion.

Foreign Currency Translation

The functional currency of the Company’s United Kingdom operations is pounds sterling. The Company translates the financial statements for the United Kingdom operations into US dollars. Gains and losses resulting from this translation do not impact the results of operations and are included in general partner’s equity — common units and limited partners’ equity-common units. Other comprehensive (loss) income was ($2.6) million, $8.0 million and ($26.8) million for the years ended December 31, 2010, 2009 and 2008, respectively. Upon sale or upon complete or substantially complete liquidation of a foreign investment, the gain or loss on the sale will include the cumulative translation adjustments that have been previously recorded in limited partners’ equity-common units.

Recently Issued Accounting Standards

Beginning in the first quarter of 2010, the Company is required to conduct an ongoing assessment to determine whether each entity in which it has an equity interest is a variable interest entity that should be consolidated if certain qualitative factors indicate that the Company has the controlling interest. This accounting change is required to be retroactively applied for all periods presented. The adoption of this requirement did not have a material impact on the Company’s financial statements.

3. REAL ESTATE

The Company owns and operates industrial and office properties located principally in suburban mixed-use developments or business parks. The carrying value of these properties by type as of December 31, 2010 and 2009 is as follows (in thousands):

	Land		Buildings
	And Land		And				Accumulated
	Improvements		Improvements		Total		Depreciation
2010
Industrial properties	$	387,079	$	1,882,659	$	2,269,738	$	463,058
Office properties		477,718		2,538,003		3,015,721		627,627
2010 Total	$	864,797	$	4,420,662	$	5,285,459	$	1,090,685
2009
Industrial properties	$	375,630	$	1,841,359	$	2,216,989	$	417,694
Office properties		473,358		2,441,891		2,915,249		553,241
2009 Total	$	848,988	$	4,283,250	$	5,132,238	$	970,935

Depreciation expense was $147.3 million in 2010, $144.5 million in 2009 and $147.2 million in 2008.

95

Information on the operating properties the Company sold during the years ended December 31, 2010 and 2009 is as follows:

2010 Sales

	Number of		Leaseable
Segment	Buildings		Square Feet		Gross Proceeds
					(in thousands)
Northeast
Southeastern PA		2		63,925	$	5,987
Lehigh/Central PA		2		146,800		7,216
New Jersey		1		39,151		5,100
Midwest		1		26,660		523
Mid-Atlantic		1		220,000		3,190
South		3		181,791		7,000
Total		10		678,327	$	29,016

2009 Sales

	Number of		Leaseable
Segment	Buildings		Square Feet		Gross Proceeds
					(in thousands)
Northeast
Southeastern PA		8		595,712	$	43,920
New Jersey		5		379,529		37,564
Midwest		3		338,690		17,540
Mid-Atlantic		9		671,633		51,263
South		4		296,540		15,275
Total		29		2,282,104	$	165,562

4. INVESTMENTS IN UNCONSOLIDATED JOINT VENTURES

Listed below are the unconsolidated joint ventures in which the Company has a noncontrolling interest. The Company receives fees from these joint ventures for services it provides. These services include property management, leasing, development and administration. These fees are included in interest and other income in the accompanying consolidated statements of operations. The Company may also receive a promoted interest if certain return thresholds are met.

Liberty Venture I, LP

The Company has a 25% interest in Liberty Venture I, LP, an entity engaged in the ownership of industrial properties in New Jersey. This joint venture is part of the Company’s Northeast reportable segment.

As of December 31, 2010, the joint venture owned 24 industrial properties totaling 3.3 million square feet and 43 acres of developable land.

The Company recognized $611,000, $682,000 and $765,000 in fees for services during the years ended December 31, 2010, 2009 and 2008, respectively.

Kings Hill Unit Trust

The Company has a 20% interest in Kings Hill Unit Trust, an entity engaged in the ownership of office and industrial properties in the County of Kent, United Kingdom. This joint venture is part of the Company’s United Kingdom reportable segment.

As of December 31, 2010, the joint venture owned 10 office properties and five industrial properties totaling 535,000 square feet.

The Company had a note receivable from Kings Hill Unit Trust for $4.3 million and $4.5 million as of December 31, 2010 and 2009, respectively. The note receivable bears interest at a 9% rate and is due in January 2016. This related party receivable is reflected in investments in and advances to unconsolidated joint ventures in the Company’s consolidated balance sheets.

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The Company had a receivable from Kings Hill Unit Trust for $147,000 and $270,000 as of December 31, 2010 and 2009, respectively. This related party receivable is reflected in accounts receivable in the Company’s consolidated balance sheets.

Income from fees and interest was $465,000, $492,000 and $603,000 during the years ended December 31, 2010, 2009 and 2008, respectively.

Liberty Illinois, LP

The Company has a 25% interest in Liberty Illinois, LP, an entity primarily engaged in the ownership of industrial properties in Illinois. This joint venture is part of the Company’s Midwest reportable segment.

As of December 31, 2010, the joint venture owned 15 industrial properties totaling 5.1 million square feet and 342 acres of developable land.

The Company recognized $596,000, $890,000 and $1.2 million in fees for services during the years ended December 31, 2010, 2009 and 2008, respectively.

Blythe Valley JV Sarl

The Company has a 20% interest in Blythe Valley JV Sarl, an entity engaged in the ownership of office properties in the West Midlands, United Kingdom. This joint venture is part of the Company’s United Kingdom reportable segment.

As of December 31, 2010, the joint venture owned 13 office properties totaling 480,000 square feet and 98 acres of developable land.

The Company had a note receivable from Blythe Valley JV Sarl for $8.5 million and $6.9 million as of December 31, 2010 and 2009, respectively. The note receivable bears interest at a 10% rate and is due in December 2017. This related party receivable is reflected in investments in and advances to unconsolidated joint ventures in the Company’s consolidated balance sheets.

The Company had a receivable from Blythe Valley JV Sarl for $101,000 and $116,000 as of December 31, 2010 and 2009, respectively. This related party receivable is reflected accounts receivable in the Company’s consolidated balance sheets.

The Company recognized $316,000, $376,000 and $449,000 in fees for services during the years ended December 31, 2010, 2009 and 2008, respectively.

Liberty Washington, LP

The Company has a 25% interest in Liberty Washington, LP, an entity engaged in the ownership of office properties in Northern Virginia and Washington, D.C. This joint venture is part of the Company’s Philadelphia/D.C. reportable segment.

As of December 31, 2010, the joint venture owned 25 office properties totaling 2.6 million square feet and six acres of developable land.

The Company had a payable to Liberty Washington, LP for $236,000 and $900,000 as of December 31, 2010 and 2009, respectively. This related party payable is reflected in investments in and advances to unconsolidated joint ventures in the Company’s consolidated balance sheets.

The Company had a receivable from Liberty Washington, LP for $2.0 million as of December 31, 2010. This related party receivable is reflected as a reduction of other liabilities in the Company’s consolidated balance sheet.

The Company recognized $4.0 million, $4.1 million and $5.6 million in interest and fees for services during the year ended December 31, 2010, 2009 and 2008, respectively.

Liberty/Commerz 1701 JFK Boulevard, LP

On April 13, 2006, the Company entered into a joint venture pursuant to which it sold an 80% interest in the equity of Comcast Center, a 1.25 million square foot office tower the Company was then developing in Philadelphia, Pennsylvania. The transaction valued the property at $512 million. Upon signing the joint venture agreement and through March 30, 2008, the criteria for sale recognition had not been met and the transaction was accounted for as a financing arrangement. This joint venture is part of the Company’s Philadelphia/D.C. reportable segment.

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On March 31, 2008, a $324 million, ten-year secured permanent financing at a rate of 6.15% for Comcast Center was funded. The proceeds from this financing were used to pay down outstanding borrowings on the Company’s credit facility.

On March 31, 2008, all conditions for sale treatment were satisfied and the Company recognized the sale of Comcast Center to an unconsolidated joint venture. Profit on the transaction was deferred until the costs of the project could be reasonably estimated. Profit on the sale of $6.6 million was recognized in the fourth quarter of 2008.

The Company had a receivable from this joint venture for $2.6 million and $2.4 million as of December 31, 2010 and 2009, respectively. This related party receivable is due to the funding of joint venture development costs and is reflected in investments in and advances to unconsolidated joint ventures in the Company’s consolidated balance sheet.

The Company had a receivable from this joint venture for $420,000 and $252,000 as of December 31, 2010 and 2009, respectively. This related party receivable is reflected in accounts receivable in the Company’s consolidated balance sheets.

The Company recognized $2.0 million, $1.9 million and $883,000 in fees for services during the years ended December 31, 2010, 2009, and 2008 respectively.

Other Joint Ventures

As of December 31, 2010, the Company had a 50% ownership interest in three additional unconsolidated joint ventures. One of these joint ventures has four operating properties and an investment in land held for development and is part of the Company’s South reportable segment. One of these joint ventures has one operating property, an investment in land held for development and a leasehold interest and is part of the Company’s United Kingdom reportable segment. The other joint venture has a leasehold interest and does not operate or own operating properties and is part of the Company’s United Kingdom reportable segment. As of December 31, 2010, the Company had a $3.1 million note payable due to this joint venture. The note payable is interest free and is due upon written notice from the joint venture.

The Company’s share of each of the joint venture’s earnings is included in equity in earnings of unconsolidated joint ventures in the accompanying consolidated statements of operations.

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The condensed balance sheets as of December 31, 2010 and 2009 and statements of operations for Liberty Venture I, LP, Kings Hill Unit Trust, Liberty Illinois, LP, Blythe Valley JV Sarl, Liberty Washington, LP, Liberty Commerz 1701 JFK Boulevard, LP and other unconsolidated joint ventures for the years ended December 31, 2010, 2009 and 2008 are as follows (in thousands):

Condensed Balance Sheets:

	December 31, 2010
	Liberty									Blythe						Liberty Commerz
	Venture I,			Kings Hill			Liberty			Valley JV			Liberty			1701 JFK
	LP			Unit Trust			Illinois, LP			Sarl			Washington, LP			Boulevard, LP			Other			Total
Real estate assets	$	133,443		$	183,763		$	252,140		$	202,544		$	909,485		$	493,196		$	68,614		$	2,243,185
Accumulated depreciation		(23,764	)		(15,861	)		(24,436	)		(14,887	)		(71,513	)		(41,733	)		(3,786	)		(195,980	)
Real estate assets, net		109,679			167,902			227,704			187,657			837,972			451,463			64,828			2,047,205
Land held for development		2,741			—			42,698			36,897			2,000			—			21,848			106,184
Other assets		11,475			6,480			13,514			12,221			55,138			49,457			28,959			177,244
Total assets	$	123,895		$	174,382		$	283,916		$	236,775		$	895,110		$	500,920		$	115,635		$	2,330,633
Debt	$	75,801		$	140,859		$	140,400		$	192,132		$	347,990		$	324,000		$	53,996		$	1,275,178
Other liabilities		2,686			41,058			5,897			67,060			34,161			10,775			10,927			172,564
Equity		45,408			(7,535	)		137,619			(22,417	)		512,959			166,145			50,712			882,891
Total liabilities and equity	$	123,895		$	174,382		$	283,916		$	236,775		$	895,110		$	500,920		$	115,635		$	2,330,633
Company’s net investment in unconsolidated joint ventures (1)	$	10,600		$	3,286		$	21,959		$	2,298		$	74,345		$	34,355		$	25,073		$	171,916

	December 31, 2009
																Liberty
										Blythe			Liberty			Commerz 1701
	Liberty			Kings Hill			Liberty			Valley JV			Washington,			JFK Boulevard,
	Venture I, LP			Unit Trust			Illinois, LP			Sarl			LP			LP			Other			Total
Real estate assets	$	132,016		$	190,110		$	229,149		$	209,869		$	777,491		$	493,119		$	72,954		$	2,104,708
Accumulated depreciation		(19,689	)		(13,081	)		(18,409	)		(10,651	)		(50,090	)		(27,880	)		(2,204	)		(142,004	)
Real estate assets, net		112,327			177,029			210,740			199,218			727,401			465,239			70,750			1,962,704
Development in progress		—			—			21,800			—			111,830			—			—			133,630
Land held for development		2,735			—			42,723			48,013			2,000			—			22,083			117,554
Other assets		11,755			9,855			11,993			12,667			52,722			46,821			34,698			180,511
Total assets	$	126,817		$	186,884		$	287,256		$	259,898		$	893,953		$	512,060		$	127,531		$	2,394,399
Debt	$	76,765		$	153,549		$	151,270		$	199,370		$	347,046		$	324,000		$	54,935		$	1,306,935
Other liabilities		2,104			41,826			6,786			51,262			31,706			10,478			17,149			161,311
Equity		47,948			(8,491	)		129,200			9,266			515,201			177,582			55,447			926,153
Total liabilities and equity	$	126,817		$	186,884		$	287,256		$	259,898		$	893,953		$	512,060		$	127,531		$	2,394,399
Company’s net investment in unconsolidated joint ventures (1)	$	11,238		$	3,198		$	19,567		$	3,383		$	73,369		$	36,461		$	28,368		$	175,584

(1) Differences between the Company’s net investment in unconsolidated joint ventures and its underlying equity in the net assets of the venture is primarily a result of impairments related to the Company’s investment in unconsolidated joint ventures, the deferral of gains associated with the sales of properties to joint ventures in which the Company retains an ownership interest and loans made to the joint ventures by the Company. Differences between historical cost basis and the basis reflected at the joint venture level (other than loans) are typically depreciated over the life of the related asset.

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Condensed Statements of Operations:

	Year Ended December 31, 2010
																Liberty
	Liberty									Blythe			Liberty			Commerz 1701
	Venture I,			Kings Hill			Liberty			Valley JV			Washington,			JFK Boulevard,
	LP			Unit Trust			Illinois, LP			Sarl			LP			LP			Other			Total
Total revenue	$	17,089		$	15,980		$	20,160		$	13,270		$	72,824		$	61,444		$	7,276		$	208,043
Operating expense		7,352			2,471			7,782			3,401			25,614			21,417			1,271			69,308
		9,737			13,509			12,378			9,869			47,210			40,027			6,005			138,735
Interest		(5,879	)		(3,078	)		(7,966	)		(14,783	)		(20,486	)		(20,445	)		(3,485	)		(76,122	)
Depreciation and amortization		(5,099	)		(4,197	)		(7,051	)		(5,315	)		(29,132	)		(15,479	)		(1,979	)		(68,252	)
Other income/(expense)		11			(564	)		(48	)		(289	)		165			(781	)		20			(1,486	)
Net (loss) income	$	(1,230	)	$	5,670		$	(2,687	)	$	(10,518	)	$	(2,243	)	$	3,322		$	561		$	(7,125	)
Company’s equity in (loss) earnings of unconsolidated joint ventures	$	(107	)	$	1,317		$	(174	)	$	(1,980	)	$	1,624		$	1,157		$	459		$	2,296

	Year Ended December 31, 2009
																Liberty
	Liberty									Blythe			Liberty			Commerz 1701
	Venture I,			Kings Hill			Liberty			Valley JV			Washington,			JFK Boulevard,
	LP			Unit Trust			Illinois, LP			Sarl			LP			LP			Other			Total
Total revenue	$	18,407		$	16,197		$	22,191		$	13,325		$	74,850		$	61,094		$	4,928		$	210,992
Operating expense		6,559			2,649			8,350			6,120			26,159			21,170			2,435			73,442
		11,848			13,548			13,841			7,205			48,691			39,924			2,493			137,550
Interest		(4,992	)		(7,674	)		(7,469	)		(13,084	)		(17,086	)		(20,455	)		(2,915	)		(73,675	)
Depreciation and amortization		(4,255	)		(4,559	)		(7,117	)		(5,576	)		(30,727	)		(15,498	)		(1,594	)		(69,326	)
Other income/(expense)		131			(602	)		(50	)		(175	)		280			(378	)		156			(638	)
Impairment charges		—			—			—			—			(39,380	)		—			—			(39,380	)
Net income (loss)	$	2,732		$	713		$	(795	)	$	(11,630	)	$	(38,222	)	$	3,593		$	(1,860	)	$	(45,469	)
Company’s equity in earnings (loss) of unconsolidated joint ventures	$	905		$	334		$	181		$	(1,318	)	$	1,649		$	1,241		$	(831	)	$	2,161

100

	Year ended December 31, 2008
																Liberty
	Liberty									Blythe			Liberty			Commerz 1701
	Venture I,			Kings Hill			Liberty			Valley JV			Washington,			JFK Boulevard,
	LP			Unit Trust			Illinois, LP			Sarl			LP			LP			Other			Total
Total revenue	$	19,075		$	18,057		$	22,811		$	15,386		$	76,552		$	43,607		$	3,056		$	198,544
Operating expense		7,074			2,490			7,003			2,377			24,440			15,080			709			59,173
		12,001			15,567			15,808			13,009			52,112			28,527			2,347			139,371
Interest		(4,522	)		(9,900	)		(7,833	)		(14,253	)		(17,670	)		(15,454	)		(2,057	)		(71,689	)
Depreciation and amortization		(4,162	)		(5,272	)		(7,378	)		(5,911	)		(34,951	)		(10,941	)		(862	)		(69,477	)
Other income/(expense)		2,473			(924	)		195			(467	)		722			191			(96	)		2,094
Gain on sale		(3	)		—			—			—			—			—			102			99
Net income (loss)	$	5,787		$	(529	)	$	792		$	(7,622	)	$	213		$	2,323		$	(566	)	$	398
Company’s equity in earnings (loss) of unconsolidated joint ventures	$	1,645		$	167		$	549		$	(1,370	)	$	1,288		$	685		$	(159	)	$	2,805

5. DEFERRED FINANCING AND LEASING COSTS

Deferred financing and leasing costs at December 31, 2010 and 2009 are as follows (in thousands):

	December 31,
	2010			2009
Deferred leasing costs	$	194,290		$	174,693
Deferred financing costs		42,190			40,952
In-place lease value and related intangible asset		26,778			27,054
		263,258			242,699
Accumulated amortization		(121,794	)		(108,390	)
Total	$	141,464		$	134,309

6. INDEBTEDNESS

Overview

Indebtedness consists of mortgage loans, unsecured notes, and borrowings under a credit facility. The weighted average interest rates for the years ended December 31, 2010, 2009 and 2008, were 6.2%, 6.2% and 6.1%, respectively. Interest costs during the years ended December 31, 2010, 2009 and 2008 in the amount of $929,000, $7.6 million and $20.0 million, respectively, were capitalized. Cash paid for interest for the years ended December 31, 2010, 2009 and 2008, was $145.8 million, $159.7 million and $177.0 million, respectively.

The Company is subject to financial covenants contained in some of its debt agreements, the most restrictive of which are detailed below under the heading “Credit Facility.” As of December 31, 2010, the Company was in compliance with all financial covenants.

101

The scheduled principal amortization and maturities of the Company’s mortgage loans, unsecured notes outstanding and the Credit Facility (as defined below) and the related weighted average interest rates at December 31, 2010 are as follows (in thousands, except percentages):

												Weighted
	Mortgages											Average
	Principal		Principal			Unsecured		Credit				Interest
	Amortization		Maturities			Notes		Facility		Total		Rate
2011	$	6,207	$	—		$	246,500	$	—	$	252,707		7.22	%
2012		5,070		53,629	(1)		230,100		—		288,799		6.27	%
2013		4,582		4,510			—		—		9,092		5.73	%
2014		4,965		2,684			200,000		—		207,649		5.66	%
2015		4,511		44,469			316,000		—		364,980		5.17	%
2016		3,068		182,318			300,000		—		485,386		6.10	%
2017		2,317		2,349			296,543		—		301,209		6.61	%
2018		—		—			100,000		—		100,000		7.50	%
2019		—		—			—		—		—		0.00	%
2020		—		—			350,000		—		350,000		4.75	%
	$	30,720	$	289,959		$	2,039,143	$	—	$	2,359,822		5.98	%

(2) There are two one-year extensions for $23,512 of mortgages.

Mortgage Loans, Unsecured Notes

Mortgage loans with maturities ranging from 2012 to 2017 are collateralized by and in some instances cross-collateralized by properties with a net book value of $547.9 million.

The interest rates on $2,319.7 million of mortgage loans and unsecured notes are fixed and range from 4.5% to 8.8%. The weighted average remaining term for the mortgage loans and unsecured notes is 5.0 years.

Credit Facility

During 2010, the Company obtained a new $500 million unsecured revolving credit facility (the “Credit Facility”) due November 2013, replacing a $600 million unsecured revolving credit facility (the “$600 million Credit Facility”) due January 2011. Based on the Company’s present ratings, borrowings under the Credit Facility are priced at LIBOR plus 230 basis points. The Credit Facility contains a competitive bid option, whereby participating lenders bid on the interest rate to be charged. This feature is available for up to 50% of the amount of the facility. There is also a 45 basis point annual facility fee on the current borrowing capacity. The Credit Facility contains financial covenants, certain of which are set forth below:

• total debt to total assets may not exceed 0.60:1;

• earnings before interest, taxes, depreciation and amortization to fixed charges may not be less than 1.50:1;

• unsecured debt to unencumbered asset value must equal or be less than 60%;

• unencumbered net operating income to unsecured interest expense must equal or exceed 200% and

• adjusted net operating income from all unencumbered properties to unsecured indebtedness must be greater than 12%.

Additionally, the Company has entered into an agreement to fund its planned improvements for the Kings Hill land development project. At December 31, 2010, the Company had not drawn any funds from a £7 million revolving credit facility. The facility expires on November 22, 2011.

Activity

In April 2010, the Company used available cash and proceeds from its $600 million Credit Facility to repay $119.3 million principal value of mortgage loans. The weighted average interest rate of these loans as of March 31, 2010 was 7.3%. The Company incurred a $1.2 million prepayment penalty and wrote off $936,000 in deferred financing costs in conjunction with the prepayment of these loans. These costs are included as interest expense in the accompanying statements of operations.

In August 2010, the Company used proceeds from its $600 million Credit Facility to repay $169.7 million principal value of 8.50% senior notes due August 2010.

102

In August 2010, The Company replaced its existing $600 million Credit Facility which was due in January 2011 with the Credit Facility. The Credit Facility is for $500 million. It matures in November 2013. Based upon the Company’s current credit ratings, borrowings under the new facility bear interest at LIBOR plus 230 basis points.

In September 2010, the Company issued $350 million of ten-year, 4.75% senior notes. The net proceeds from this issuance were used to repay borrowings under the Company’s Credit Facility and for general corporate purposes.

During the year ended December 31, 2009, the Company satisfied a 7.75% senior note due April 2009 in full by paying $238.6 million in outstanding principal amount and satisfied an 8.125% medium term unsecured note due January 2009 in full by paying $20.0 million in outstanding principal amount.

During the year ended December 31, 2009, the Company purchased $11.4 million of its 7.75% senior notes due April 2009, $6.9 million of its 8.50% senior notes due August 2010, $3.5 million of its 7.25% senior notes due March 2011, $4.9 million of its 6.375% senior notes due August 2012 and $3.5 million of its 6.625% senior notes due October 2017. These notes were purchased at a $1.5 million aggregate discount. The discount is included in net income as a debt extinguishment gain.

During the year ended December 31, 2009, the Company closed on mortgages totaling $330.3 million bearing interest at an average rate of 7.1%. The net proceeds of these mortgages were used to pay down outstanding borrowings under the $600 million Credit Facility and for general corporate purposes.

During the year ended December 31, 2008, the Company purchased $23.4 million of its 8.50% senior notes due August 2010. These notes were purchased at a $2.5 million discount. The discount is included in net income as a debt extinguishment gain.

7. LEASING ACTIVITY

Future minimum rental payments due from tenants under noncancelable operating leases as of December 31, 2010 are as follows (in thousands):

2011	$	494,328
2012		446,437
2013		389,111
2014		321,221
2015		256,225
Thereafter		817,299
TOTAL	$	2,724,621

In addition to minimum rental payments, most leases require the tenants to pay for their pro rata share of specified operating expenses. These payments are included as operating expense reimbursement in the accompanying consolidated statements of operations.

8. OWNERS’ EQUITY

Common Units

General and Limited partners’ equity — common units relates to limited partnership interests of the Operating Partnership issued in connection with the formation of the Company and certain subsequent acquisitions. The common units outstanding as of December 31, 2010 have the same economic characteristics as common shares of the Trust. The 3,928,733 common units are the limited partners’ equity — common units held by persons and entities other than Liberty Property Trust, the general partner of Liberty Property Limited Partnership, which holds a number of common units equal to the number of outstanding common shares of beneficial interest. Both the common units held by Liberty Property Trust and the common units held by persons and entities other than Liberty Property Trust are counted in the weighted average number of common units outstanding during any given period. The 3,928,733 common units share proportionately in the net income or loss and in any distributions of the Operating Partnership and are exchangeable into the same number of common shares of the Trust. The market value of the 3,928,733 common units at December 31, 2010 based on the closing price of the shares of the Company at December 31, 2010 was $125.4 million.

103

Preferred Units

The Company has outstanding the following Cumulative Redeemable Preferred Units of the Operating Partnership, (the “Preferred Units”):

Date of						Liquidation		Dividend			Redeemable
Issue	Issue	Amount		Units		Preference		Rate			As of		Exchangeable After
		(in 000’s)
7/28/99	Series B	$	95,000		3,800	$	25		7.45	%		8/31/09	8/31/13 into Series B Cumulative Redeemable Preferred Shares of the Trust
6/16/05	Series E	$	20,000		400	$	50		7.00	%		6/16/10	6/16/15 into Series E Cumulative Redeemable Preferred Shares of the Trust
6/30/05	Series F	$	50,000		1,000	$	50		6.65	%		6/30/10	12/12/15 into Series F Cumulative Redeemable Preferred Shares of the Trust
12/15/06	Series G	$	27,000		540	$	50		6.70	%		12/15/11	12/15/16 into Series G Cumulative Redeemable Preferred Shares of the Trust
8/21/07	Series H	$	100,000		4,000	$	25		7.40	%		8/21/12	8/21/17 into Series H Cumulative Redeemable Preferred Shares of the Trust

The Preferred Units are callable at the Operating Partnership’s option after a stated period of time. The Trust as the sole general partner of the Operating Partnership may at its option elect to settle the redemption for cash or through the exchange on a one-for-one basis with unregistered preferred shares of the Trust.

The Company paid the following Preferred Unit distributions for the year ended December 31:

	2010		2009		2008
Distributions (in millions)	$	21.0	$	21.0	$	21.0
Distribution per unit:
Series B	$	1.86	$	1.86	$	1.86
Series E	$	3.50	$	3.50	$	3.50
Series F	$	3.33	$	3.33	$	3.33
Series G	$	3.35	$	3.35	$	3.35
Series H	$	1.85	$	1.85	$	1.85

Limited Partners’ Equity

Limited partners’ equity in the accompanying financial statements represents the interests of the common and preferred units in Liberty Property Limited Partnership not held by the Trust. For the years ended December 31, 2008 and prior, these interests were classified in the mezzanine section of the Company’s Consolidated Balance Sheets. In 2009, the Trust and the Operating Partnership entered into an indemnification agreement which requires the Trust to hold the Operating Partnership harmless in connection with the conversion of any common units or preferred units. The noncontrolling interests — common units and preferred units were therefore transferred to owners’ equity.

A reclassification from limited partners’ equity — common units to general partner’s equity was made reflecting the effect of the cumulative redemption of common units to common shares in the amount of $24.5 million at December 31, 2008.

104

The following details the change in limited partners’ equity for the year ended December 31, 2008. For the years ended December 31, 2009 and 2010, see the Company’s Consolidated Statements of Owners’ Equity.

	Limited partners’			Limited partners’
	equity -			equity -
	common units			preferred units
Balance at January 1, 2008	$	120,713		$	287,960
Contributions from partners		176			—
Distributions to partners		(10,131	)		(21,013	)
Issuance of operating partnership units		—			—
Net income		6,669			21,012
Redemption of limited partners common units for common shares		(24,396	)		—
Balance at December 31, 2008	$	93,031		$	287,959

Continuous Equity Offering

During the years ended December 31, 2009 and 2008, the Company sold common units pursuant to a continuous offering program. During the years ended December 31, 2009 and 2008, the Company sold 12.8 million and 495,000 common units, respectively, through this program. The net proceeds from the offering of $283.2 million and $10.8 million for the years ended December 31, 2009 and 2008, respectively, were used for general corporate purposes, including the funding of maturing senior note obligations. The Company did not sell any common units pursuant to a continuous offering program during 2010.

Sale of Common Units

In October 2008, the Company sold 4,750,000 common units. The net proceeds of the offering of $149.5 million were used to pay down outstanding borrowings under the $600 million Credit Facility and for general corporate purposes.

Noncontrolling Interest — Consolidated Joint Ventures

Noncontrolling interest — consolidated joint ventures includes third-party ownership interests in consolidated joint venture investments.

9. COMMITMENTS AND CONTINGENCIES

Environmental Matters

Substantially all of the Properties and land were subject to Phase I Environmental Assessments and when appropriate Phase II Environmental Assessments (collectively, the “Environmental Assessments”) obtained in contemplation of their acquisition by the Company. The Environmental Assessments consisted of, among other activities, a visual inspection of each Property and its neighborhood and a check of pertinent public records. The Environmental Assessments did not reveal, nor is the Company aware of, any non-compliance with environmental laws, environmental liability or other environmental claim that the Company believes would likely have a material adverse effect on the Company.

Operating Ground Lease Agreements

Future minimum rental payments under the terms of all non-cancelable operating ground leases under which the Company is the lessee, as of December 31, 2010, are as follows (in thousands):

Year	Amount
2011	$	290
2012		294
2013		297
2014		294
2015		291
2016 through 2070		10,285
Total	$	11,751

105

Operating ground lease expense incurred by the Company during the years ended December 31, 2010, 2009 and 2008 amounted to $434,000, $460,000 and $486,000, respectively.

Legal Matters

As noted in previous filings, as a result of the Company’s acquisition of Republic Property Trust in October, 2007 the Company was substituted as a party to certain ongoing litigation (the “Republic Litigation”). The Republic Litigation has been settled, and the settlement has not had, and will not have, a material impact on the Company’s financial position and results of operations for any period.

From time to time, the Company is a party to a variety of legal proceedings, claims and assessments arising in the normal course of business. The Company regularly assesses the liabilities and contingencies in connection with these matters based on the latest available information. For those matters where it is probable that the Company has incurred or will incur a loss and the loss or range of loss can be reasonably estimated, the estimated loss is accrued and charged to income in the Company’s consolidated financial statements. In other cases, because of the uncertainties related to both the probable outcome and amount or range of potential loss, a reasonable estimate of liability, if any, cannot be made. The Company has reviewed the liabilities and contingencies in connection with these matters. As of December 31, 2010, the Company believes that there are no legal proceedings, claims or assessments that are expected to have a material adverse effect on the Company’s business or financial statements.

Other

The Company is obligated to make additional capital contributions to unconsolidated joint ventures of $4.1 million. The Company has not guaranteed any of the principal balance of the debt of the unconsolidated joint ventures.

The Company has guaranteed the interest payments under its mortgage loan for its unconsolidated joint venture Blythe Valley JV Sarl for a maximum of $2.1 million.

The Company has letter of credit obligations of $934,000 related to development requirements. The Company believes that it is remote that there will be a draw upon these letter of credit obligations.

The Company is obligated to pay for tenant improvements not yet completed for a maximum of $35.7 million.

The Company maintains cash and cash equivalents at financial institutions. The combined account balances at each institution typically exceed FDIC insurance coverage and, as a result, there is a concentration of credit risk related to amounts on deposit in excess of FDIC insurance coverage. The Company believes the risk is not significant.

106

10. QUARTERLY RESULTS OF OPERATIONS (UNAUDITED)

A summary of quarterly results of operations for the years ended December 31, 2010 and 2009 follows. Certain amounts have been reclassified to conform to the current presentation of discontinued operations (in thousands, except per unit amounts).

	Quarter Ended
	Dec. 31,		Sept. 30,		June 30,		Mar. 31,		Dec. 31,			Sept. 30,		June 30,		Mar. 31,
	2010		2010		2010		2010		2009			2009		2009		2009
Operating revenue	$	185,892	$	188,521	$	184,274	$	188,143	$	186,339		$	186,069	$	182,798	$	184,173
Income from continuing operations		35,213		40,226		37,389		32,834		(57,866	)		40,318		38,338		32,393
Discontinued operations		1,320		780		2,625		2,988		9,060			10,426		4,874		1,449
Income available to common unitholders		36,533		41,006		40,014		35,822		(48,806	)		50,744		43,212		33,842
Income per common unit — basic (1)		0.27		0.31		0.30		0.26		(0.46	)		0.39		0.35		0.28
Income per common unit — diluted (1)		0.26		0.30		0.29		0.26		(0.46	)		0.39		0.35		0.28

(1) The sum of quarterly financial data may vary from the annual data due to rounding.

11. SEGMENT INFORMATION

The Company operates its portfolio of properties primarily throughout the Mid-Atlantic, Southeastern, Midwestern and Southwestern United States. Additionally, the Company owns certain assets in the United Kingdom. The Company reviews the performance of the portfolio on a geographical basis. As such, the following regions are considered the Company’s reportable segments:

Reportable Segments	Markets
Northeast	Southeastern PA; Lehigh/Central PA; New Jersey
Midwest	Minnesota; Milwaukee; Chicago
Mid-Atlantic	Maryland; Carolinas; Richmond; Virginia Beach
South	Jacksonville; Orlando; Boca Raton; Tampa; Texas; Arizona
Philadelphia/D.C.	Philadelphia; Northern Virginia/Washington, D.C.
United Kingdom	County of Kent; West Midlands

The Company’s reportable segments are distinct business units which are each managed separately in order to concentrate market knowledge within a geographic area. Within these reportable segments, the Company derives its revenues from its two product types: industrial properties and office properties.

The Company evaluates performance of the reportable segments based on property level operating income, which is calculated as rental revenue and operating expense reimbursement less rental property expenses and real estate taxes. The accounting policies of the reportable segments are the same as those for the Company on a consolidated basis.

107

The operating information by segment is as follows (in thousands):

YEAR ENDED DECEMBER 31, 2010

	Northeast
			Lehigh/										phila-
	Southeastern		Central		New								delphia /		united
	PA		PA		Jersey		Midwest		mid-atlantic		South		D.C.		kingdom		total
Operating revenue	$	181,048	$	103,651	$	31,957	$	78,294	$	134,778	$	184,280	$	28,611	$	4,211	$	746,830
Rental property expenses and real estate taxes		59,476		26,620		13,624		30,658		41,745		60,315		7,063		932		240,433
Property level operating income	$	121,572	$	77,031	$	18,333	$	47,636	$	93,033	$	123,965	$	21,548	$	3,279		506,397
Interest and other income																		10,039
Interest expense																		(149,320	)
General and administrative																		(52,850	)
Depreciation and amortization																		(173,402	)
Income before property dispositions, income taxes, equity in earnings of unconsolidated joint ventures and impairment charges																		140,864
Gain on property dispositions																		4,616
Income taxes																		(1,736	)
Equity in earnings of unconsolidated joint ventures																		2,296
Impairment charges — investment in unconsolidated joint ventures and other																		(378	)
Discontinued operations																		7,713
Net income																	$	153,375

YEAR ENDED DECEMBER 31, 2009

	Northeast												phila-
	Southeastern		Lehigh/		New				mid-				delphia /		united
	PA		Central PA		Jersey		Midwest		atlantic		South		D.C.		kingdom		total
Operating revenue	$	183,057	$	99,046	$	30,436	$	82,816	$	136,308	$	181,252	$	22,061	$	4,403	$	739,379
Rental property expenses and real estate taxes		58,979		26,807		12,309		31,631		40,245		58,241		5,213		935		234,360
Property level operating income	$	124,078	$	72,239	$	18,127	$	51,185	$	96,063	$	123,011	$	16,848	$	3,468		505,019
Interest and other income																		11,472
Debt extinguishment gain																		1,547
Interest expense																		(148,902	)
General and administrative																		(51,237	)
Depreciation and amortization																		(169,818	)
Income before property dispositions, income taxes and equity in earnings of unconsolidated joint ventures and impairment charges																		148,081
Gain on property dispositions																		1,687
Income taxes																		(494	)
Equity in earnings of unconsolidated joint ventures																		2,161
Impairment charges — investment in unconsolidated joint ventures and other																		(82,552	)
— goodwill																		(15,700	)
Discontinued operations																		25,809
Net income																	$	78,992

108

YEAR ENDED DECEMBER 31, 2008

	Northeast												phila-
	Southeastern		Lehigh/		New								delphia /		united
	PA		Central PA		Jersey		Midwest		mid-atlantic		South		D.C.		kingdom		total
Operating revenue	$	175,362	$	94,176	$	31,851	$	81,513	$	139,175	$	169,610	$	29,425	$	4,339	$	725,451
Rental property expenses and real estate taxes		56,810		25,320		12,443		29,817		40,885		56,416		7,791		1,044		230,526
Property level operating income	$	118,552	$	68,856	$	19,408	$	51,696	$	98,290	$	113,194	$	21,634	$	3,295		494,925
Interest and other income																		13,404
Debt extinguishment gain																		2,521
Interest expense																		(152,184	)
General and administrative																		(54,462	)
Depreciation and amortization																		(168,148	)
Income before property dispositions, income taxes and equity in earnings of unconsolidated joint ventures																		136,056
Gain on property dispositions																		10,572
Income taxes																		(1,645	)
Equity in earnings of unconsolidated joint ventures																		2,805
Discontinued operations																		32,318
Net income																	$	180,106

REAL ESTATE RELATED REVENUES BY TYPE

	Northeast												phila-
Year ended	Southeastern		Lehigh/		New				mid-				delphia /		united
December 31, 2010	PA		Central PA		Jersey		Midwest		atlantic		South		D.C.		kingdom		total
Industrial	$	30,177	$	91,692	$	9,566	$	30,258	$	53,963	$	77,113	$	7,588	$	1,263	$	301,620
Office		150,871		11,959		22,391		48,036		80,815		107,167		21,023		2,948		445,210
Total	$	181,048	$	103,651	$	31,957	$	78,294	$	134,778	$	184,280	$	28,611	$	4,211	$	746,830

	Northeast												phila-
Year ended	Southeastern		Lehigh/		New				mid-				delphia /		united
December 31, 2009	PA		Central PA		Jersey		Midwest		atlantic		South		D.C.		kingdom		total
Industrial	$	31,285	$	86,399	$	9,665	$	34,730	$	52,662	$	78,052	$	3,472	$	1,294	$	297,559
Office		151,772		12,647		20,771		48,086		83,646		103,200		18,589		3,109		441,820
Total	$	183,057	$	99,046	$	30,436	$	82,816	$	136,308	$	181,252	$	22,061	$	4,403	$	739,379

109

	Northeast												phila-
Year ended	Southeastern		Lehigh/		New				mid-				delphia /		united
December 31, 2008	PA		Central PA		Jersey		Midwest		atlantic		South		D.C.		kingdom		total
Industrial	$	32,164	$	81,242	$	9,745	$	33,981	$	51,768	$	75,419	$	2,232	$	1,486	$	288,037
Office		143,198		12,934		22,106		47,532		87,407		94,191		27,193		2,853		437,414
Total	$	175,362	$	94,176	$	31,851	$	81,513	$	139,175	$	169,610	$	29,425	$	4,339	$	725,451

ROLLFORWARD OF OPERATING REAL ESTATE ASSETS BY REPORTABLE SEGMENT

	Northeast																		Phila-			United
	Southeastern			Lehigh/															Delphia /			Kingdom
	PA			Central PA			New Jersey			Midwest			Mid-Atlantic			South			D.C.			(1)			Total
January 1, 2010	$	1,079,790		$	808,776		$	165,426		$	531,234		$	1,010,119		$	1,347,742		$	146,650		$	42,501		$	5,132,238
Additions		15,941			26,367			5,121			9,354			24,956			93,701			22,722			(1,482	)		196,680
Dispositions		(11,324	)		(3,487	)		(5,125	)		(2,670	)		(9,217	)		(11,415	)		(221	)		—			(43,459	)
December 31, 2010	$	1,084,407		$	831,656		$	165,422		$	537,918		$	1,025,858		$	1,430,028		$	169,151		$	41,019			5,285,459
Accumulated depreciation																										(1,090,685	)
Land held for development																										209,253
Other assets																										658,806
Total assets at December 31, 2010																									$	5,062,833

	Northeast																		Phila-
	Southeastern			Lehigh/															Delphia /			United
	PA			Central PA			New Jersey			Midwest			Mid-Atlantic			South			D.C.			Kingdom (1)		Total
January 1, 2009	$	1,072,652		$	714,514		$	179,614		$	529,439		$	966,730		$	1,265,379		$	110,380		$	38,413	$	4,877,121
Additions		10,976			99,233			3,754			11,440			63,173			96,330			36,299			4,088		325,293
Dispositions		(3,838	)		(4,971	)		(17,942	)		(9,645	)		(19,784	)		(13,967	)		(29	)		—		(70,176	)
December 31, 2009	$	1,079,790		$	808,776		$	165,426		$	531,234		$	1,010,119		$	1,347,742		$	146,650		$	42,501		5,132,238
Accumulated depreciation																									(970,935	)
Development in progress																									66,714
Land held for development																									218,633
Assets held for sale																									5,564
Other assets																									776,729
Total assets at December 31, 2009																								$	5,228,943

(1) United Kingdom additions are impacted by foreign currency translation gain or loss.

110

12. ACCOUNTING FOR THE IMPAIRMENT OR DISPOSAL OF LONG-LIVED ASSETS

Discontinued Operations

The operating results and gain/(loss) on disposition of real estate for properties sold and held for sale are reflected in the consolidated statements of operations as discontinued operations. Prior year financial statements have been adjusted for discontinued operations. The proceeds from dispositions of operating properties with no continuing involvement were $29.0 million, $165.6 million and $80.0 million for the years ended December 31, 2010, 2009 and 2008, respectively.

Below is a summary of the results of operations of the properties disposed of through the respective disposition dates (in thousands):

	Year Ended December 31,
	2010			2009			2008
Revenues	$	3,283		$	20,400		$	36,468
Operating expenses		(1,446	)		(6,130	)		(13,873	)
Interest expense		(384	)		(2,862	)		(5,694	)
Depreciation and amortization		(597	)		(3,458	)		(8,102	)
Income before property dispositions and impairment charges	$	856		$	7,950		$	8,799

Interest expense is allocated to discontinued operations. The allocation of interest expense to discontinued operations was based on the ratio of net assets sold (without continuing involvement) to the sum of total net assets plus consolidated debt.

Asset Impairment

During the years ended December 31, 2010, 2009 and 2008, the Company recognized impairment losses of $957,000, $9.5 million (Excludes $94.5 million impairment charges recognized in 2009 related to investments in unconsolidated joint ventures and goodwill. See Note 2.) and $3.1 million, respectively. The impairment losses are for operating properties or land parcels and were in the segments and for the amounts as indicated below (amounts in thousands):

	Year Ended December 31,
Segment	2010			2009		2008
Northeast	$	(52	)(1)	$	1,251	$	957
Midwest		511			837		1,490
Mid-Atlantic		(239	)(1)		3,992		629
South		360			292		—
Philadelphia/D.C.		377			3,137		—
Total	$	957		$	9,509	$	3,076

(1) Represents recovery of estimated sales costs on properties sold.

Impairment losses of $327,000 were recognized in the fourth quarter of 2010.

For the year ended December 31, 2010, $579,000 in impairments related to properties sold were included in the caption discontinued operations in the Company’s consolidated statement of operations and $378,000 in impairments were included in the caption impairment charges — investment in unconsolidated joint ventures and other in the Company’s consolidated statement of operations. For the year ended December 31, 2009, $5.8 million in impairments related to properties sold were included in the caption discontinued operations in the Company’s consolidated statement of operations and $3.7 million in impairment was included in the caption impairment charges — investment in unconsolidated joint ventures and other in the Company’s consolidated statement of operations. For the year ended December 31, 2008, $3.1 million in impairment related to properties sold was included in the caption discontinued operations in the Company’s statement of operations. The Company determined these impairments through a comparison of the aggregate future cash flows (including quoted offer prices) to be generated by the properties to the carrying value of the properties. The Company has evaluated each of the properties and land held for development and has determined that there are no additional valuation adjustments necessary at December 31, 2010.

111

13. SUPPLEMENTAL DISCLOSURE TO STATEMENTS OF CASH FLOWS

The following are supplemental disclosures to the statements of cash flows for the years ended December 31, 2010, 2009 and 2008 (amounts in thousands):

	2010		2009		2008
Write-off of fully depreciated property and deferred costs	$	48,373	$	76,714	$	31,421
Assumption of mortgage loans		2,833		—		—
Increase in investment in unconsolidated joint ventures		—		—		(35,172	)
Disposition of properties/development in progress		—		—		173,624
Disposition of deferred financing and leasing costs		—		—		12,526
Decrease in accounts receivable		—		—		7,854
Decrease in deferred rent receivable		—		—		6,580
Decrease in prepaid and other assets		—		—		38,486
Decrease in credit facility		—		—		(152,960	)
Decrease in other liabilities		—		—		(50,938	)

14. SUBSEQUENT EVENTS

Subsequent to December 31, 2010, the Company started the development, on a speculative basis, of two industrial-flex buildings and it signed leases (one of which is subject to certain approvals) committing it to the development of two 100% leased office buildings. The industrial-flex buildings are expected to contain a total of 103,000 square feet of leasable space and represent an anticipated investment of $15 million. The office buildings are expected to contain a total of 360,000 square feet of leasable space and represent an anticipated investment of $130 million.

112

LIBERTY PROPERTY LIMITED PARTNERSHIP
REAL ESTATE AND ACCUMULATED DEPRECIATION
AS OF DECEMBER 31, 2010

								Costs
								Capitalized										Date of
								Subsequent		Gross Amount Carried at End of Period						Accumulated		Construction	Depreciable
				Initial Cost				to		Land and		Building and		Total		Depreciation		or	life
Project	Location	Encumbrances		Land		Building		Acquisition		Improvements		Improvements		12/31/2010		12/31/10		Acquisition	(years)
OPERATING PROPERTIES
1501 Perryman Road	Aberdeen, MD	$	—	$	5,813,324	$	18,874,059	$	4,470,131	$	5,816,839	$	23,340,674	$	29,157,514	$	2,506,553	2005	40 yrs.
2196 Avenue C	Allentown, PA		—		101,159		—		1,354,683		107,307		1,348,535		1,455,842		877,850	1980	40 yrs.
2202 Hanger Place	Allentown, PA		—		137,439		—		1,331,299		138,127		1,330,610		1,468,738		932,036	1981	40 yrs.
7437 Industrial Boulevard	Allentown, PA		—		717,488		5,022,413		2,864,910		726,651		7,878,160		8,604,810		3,526,473	1976	40 yrs.
7339 Industrial Boulevard	Allentown, PA		—		1,187,776		—		6,722,946		1,197,447		6,713,275		7,910,723		2,468,308	1996	40 yrs.
400 Nestle Way	Allentown, PA		18,970,828		8,065,500		—		27,420,765		8,184,096		27,302,169		35,486,265		10,636,515	1997	40 yrs.
7248 Industrial Boulevard	Allentown, PA		—		2,670,849		13,307,408		3,905,038		2,670,673		17,212,622		19,883,295		5,465,956	1988	40 yrs.
700 Nestle Way	Allentown, PA		*		3,473,120		—		20,069,956		4,174,970		19,368,105		23,543,076		6,840,477	1998	40 yrs.
7562 Penn Drive	Allentown, PA		—		269,614		844,069		168,845		269,614		1,012,914		1,282,528		338,583	1989	40 yrs.
7277 Williams Avenue	Allentown, PA		—		462,964		1,449,009		261,433		463,123		1,710,283		2,173,406		593,898	1989	40 yrs.
7355 Williams Avenue	Allentown, PA		—		489,749		1,658,091		305,327		489,749		1,963,418		2,453,167		680,356	1998	40 yrs.
794 Roble Road	Allentown, PA		—		1,147,541		6,088,041		1,183,790		1,147,541		7,271,832		8,419,373		2,769,825	1985	40 yrs.
8014 Industrial Boulevard	Allentown, PA		*		4,019,258		—		9,764,666		3,645,117		10,138,806		13,783,924		3,604,517	1999	40 yrs.
705 Boulder Drive	Allentown, PA		*		10,594,027		—		27,314,822		10,596,767		27,312,082		37,908,849		4,358,201	2001	40 yrs.
651 Boulder Drive	Allentown, PA		—		4,308,646		—		17,823,342		4,308,646		17,823,342		22,131,987		4,509,238	2000	40 yrs.
8150 Industrial Boulevard	Allentown, PA		—		2,564,167				8,583,521		2,571,466		8,576,222		11,147,688		2,094,455	2002	40 yrs.
8250 Industrial Boulevard	Allentown, PA		*		1,025,667				5,339,264		1,035,854		5,329,076		6,364,931		1,261,154	2002	40 yrs.
650 Boulder Drive	Allentown, PA		*		5,208,248				31,373,290		9,961,788		26,619,750		36,581,539		5,431,788	2002	40 yrs.
7165 Ambassador Drive	Allentown, PA		*		792,999		—		4,533,868		804,848		4,522,019		5,326,867		1,160,038	2002	40 yrs.
200 Boulder Drive	Allentown, PA		—		4,722,683		18,922,645		439,944		4,722,683		19,362,589		24,085,272		3,051,609	2004	40 yrs.
250 Boulder Drive	Allentown, PA		—		3,599,936		12,099,145		2,338,593		3,717,733		14,319,942		18,037,675		2,408,923	2004	40 yrs.
8400 Industrial Boulevard	Allentown, PA		—		6,725,948		—		27,128,012		7,521,211		26,332,749		33,853,961		3,025,564	2005	40 yrs.
6560 Stonegate Drive	Allentown, PA		—		458,281		—		2,805,110		458,945		2,804,447		3,263,391		1,544,292	1989	40 yrs.
6370 Hedgewood Drive	Allentown, PA		—		540,795		—		3,195,210		541,459		3,194,547		3,736,005		1,551,623	1990	40 yrs.
6390 Hedgewood Drive	Allentown, PA		—		707,203		—		2,650,618		707,867		2,649,954		3,357,821		1,389,177	1990	40 yrs.
6350 Hedgewood Drive	Allentown, PA		*		360,027		—		3,989,956		560,691		3,789,292		4,349,983		1,745,243	1989	40 yrs.
6330 Hedgewood Drive	Allentown, PA		—		531,268		—		4,731,901		532,047		4,731,122		5,263,169		2,699,255	1988	40 yrs.
6580 Snowdrift Road	Allentown, PA		—		388,328		—		3,388,842		389,081		3,388,089		3,777,170		1,855,845	1988	40 yrs.
6540 Stonegate Drive	Allentown, PA		—		422,042		—		3,909,892		422,730		3,909,205		4,331,934		2,236,361	1988	40 yrs.
974 Marcon Boulevard	Allentown, PA		—		143,500		—		2,251,823		144,248		2,251,075		2,395,323		1,280,943	1987	40 yrs.
964 Marcon Boulevard	Allentown, PA		—		138,816		—		1,851,766		139,480		1,851,102		1,990,582		1,077,744	1985	40 yrs.
764 Roble Road	Allentown, PA		—		141,069		—		876,165		141,746		875,488		1,017,234		537,148	1985	40 yrs.
3174 Airport Road	Allentown, PA		—		98,986		—		1,310,686		98,986		1,310,686		1,409,672		771,080	1979	40 yrs.
2201 Hanger Place	Allentown, PA		—		128,454		—		1,918,272		129,142		1,917,583		2,046,726		1,383,382	1987	40 yrs.
954 Marcon Boulevard	Allentown, PA		—		103,665		—		1,346,983		104,453		1,346,196		1,450,648		731,272	1981	40 yrs.
754 Roble Road	Allentown, PA		—		162,115		1,731,885		410,146		163,735		2,140,411		2,304,146		951,499	1986	40 yrs.
944 Marcon Boulevard	Allentown, PA		—		118,521		1,435,479		518,471		119,711		1,952,760		2,072,471		799,236	1986	40 yrs.
6520 Stonegate Drive	Allentown, PA		—		453,315		—		1,673,590		484,361		1,642,544		2,126,905		711,038	1996	40 yrs.
2041 Avenue C	Allentown, PA		—		213,599		1,095,217		357,991		213,879		1,452,928		1,666,807		496,534	1990	40 yrs.
7620 Cetronia Road	Allentown, PA		—		1,091,806		3,851,456		228,320		1,093,724		4,077,858		5,171,582		1,566,110	1990	40 yrs.
180,190 Cochrane Drive	Annapolis, MD		—		3,670,256		—		22,959,664		3,752,293		22,877,627		26,629,920		11,262,597	1988	40 yrs.
4606 Richlynn Drive	Belcamp, MD		—		299,600		1,818,861		712,787		299,600		2,531,649		2,831,249		724,193	1985	40 yrs.
1455 Valley Center Parkway	Bethlehem, PA		—		670,290		—		3,230,418		545,172		3,355,536		3,900,708		1,206,845	1997	40 yrs.
1640 Valley Center Parkway	Bethlehem, PA		—		359,000		—		3,882,696		190,728		4,050,968		4,241,696		1,369,909	1996	40 yrs.
1650 Valley Center Parkway	Bethlehem, PA		—		359,000		—		1,974,113		188,896		2,144,217		2,333,113		805,475	1997	40 yrs.
1660 Valley Center Parkway	Bethlehem, PA		—		359,000		—		2,378,710		188,721		2,548,988		2,737,710		868,984	1998	40 yrs.
83 South Commerce Way	Bethlehem, PA		—		143,661		888,128		406,994		212,744		1,226,039		1,438,783		487,499	1989	40 yrs.
85 South Commerce Way	Bethlehem, PA		—		236,708		987,949		178,233		237,078		1,165,813		1,402,890		416,529	1989	40 yrs.
87 South Commerce Way	Bethlehem, PA		—		253,886		1,062,881		244,820		253,886		1,307,701		1,561,587		509,901	1989	40 yrs.
89 South Commerce Way	Bethlehem, PA		—		320,000		—		1,819,815		367,706		1,772,109		2,139,815		715,996	1998	40 yrs.
1525 Valley Center Parkway	Bethlehem, PA		—		475,686		—		8,447,080		804,104		8,118,662		8,922,766		2,225,827	1999	40 yrs.
74 West Broad Street	Bethlehem, PA		—		1,096,127				14,010,142		1,099,079		14,007,191		15,106,269		4,337,979	2002	40 yrs.
1605 Valley Center Parkway	Bethlehem, PA		—		729,751				11,450,461		1,766,196		10,414,016		12,180,212		3,067,269	2000	40 yrs.
1495 Valley Center Parkway	Bethlehem, PA		—		434,640		—		5,061,217		435,303		5,060,554		5,495,857		2,536,011	1990	40 yrs.
1550 Valley Center Parkway	Bethlehem, PA		—		196,954		—		4,234,073		197,700		4,233,327		4,431,027		2,047,359	1988	40 yrs.
1560 Valley Center Parkway	Bethlehem, PA		—		240,069		—		4,596,781		240,732		4,596,118		4,836,850		2,513,686	1988	40 yrs.
1510 Valley Center Parkway	Bethlehem, PA		—		312,209		—		3,744,301		312,873		3,743,636		4,056,510		1,990,833	1988	40 yrs.
1530 Valley Center Parkway	Bethlehem, PA		—		211,747		—		3,002,234		212,492		3,001,489		3,213,981		1,625,362	1988	40 yrs.
57 South Commerce Way	Bethlehem, PA		—		390,839		2,701,161		645,206		395,459		3,341,747		3,737,206		1,470,232	1986	40 yrs.
6601-6625 W. 78th Street	Bloomington, MN		—		2,263,060		—		39,300,906		2,310,246		39,253,720		41,563,966		12,053,222	1998	40 yrs.
6161 Green Valley Drive	Bloomington, MN		—		740,378		3,311,602		1,545,672		709,961		4,887,690		5,597,651		1,196,645	1992	40 yrs.
10801 Nesbitt Avenue South	Bloomington, MN		—		784,577				3,538,021		786,382		3,536,216		4,322,598		934,358	2001	40 yrs.
5775 West Old Shakopee Road	Bloomington, MN		—		2,052,018		3,849,649		1,657,571		2,060,644		5,498,593		7,559,238		1,485,015	2002	40 yrs.
5715 Old Shakopee Road West	Bloomington, MN		—		1,263,226		2,360,782		2,021,057		1,264,758		4,380,307		5,645,065		921,844	2002	40 yrs.
5735 Old Shakopee Road West	Bloomington, MN		—		1,263,226		2,360,782		1,027,173		1,264,758		3,386,423		4,651,181		811,901	2002	40 yrs.
5705 Old Shakopee Road	Bloomington, MN		—		2,113,223		—		5,520,730		2,148,571		5,485,383		7,633,953		817,941	2001	40 yrs.
1701 Clint Moore Boulevard	Boca Raton, FL		—		1,430,884		3,043,553		1,370,725		1,430,937		4,414,225		5,845,162		1,454,028	1985	40 yrs.
951 Broken Sound Parkway	Boca Raton, FL		—		1,426,251		6,098,952		1,788,361		1,426,251		7,887,313		9,313,564		2,702,850	1986	40 yrs.
777 Yamato Road	Boca Raton, FL		—		4,101,247		16,077,347		5,703,158		4,501,247		21,380,506		25,881,752		6,878,070	1987	40 yrs.
1801 Clint Moore Road	Boca Raton, FL		—		1,065,068		4,481,644		261,265		1,065,068		4,742,909		5,807,977		1,513,549	1986	40 yrs.
750 Park of Commerce Boulevard	Boca Raton, FL		—		2,430,000		—		21,130,343		2,473,406		21,086,937		23,560,343		814,808	2007	40 yrs.
400 Boulder Drive	Breinigsville, PA		—		—				13,408,721		2,865,575		10,543,146		13,408,721		1,685,899	2003	40 yrs.
860 Nestle Way	Breinigsville, PA		—		8,118,881		18,885,486		7,247,724		8,118,881		26,133,210		34,252,091		3,771,051	2004	40 yrs.

113

LIBERTY PROPERTY LIMITED PARTNERSHIP
REAL ESTATE AND ACCUMULATED DEPRECIATION
AS OF DECEMBER 31, 2010

								Costs
								Capitalized											Date of
								Subsequent		Gross Amount Carried at End of Period						Accumulated			Construction	Depreciable
				Initial Cost				to		Land and		Building and		Total		Depreciation			or	life
Project	Location	Encumbrances		Land		Building		Acquisition		Improvements		Improvements		12/31/2010		12/31/10			Acquisition	(years)
OPERATING PROPERTIES
8201 Industrial Boulevard	Breinigsville, PA		*		2,089,719		—		8,328,910		2,222,168		8,196,461		10,418,629		937,164		2006	40 yrs.
8500 Industrial Bouldvard	Breinigsville, PA		—		8,752,708		—		39,837,821		11,511,499		37,079,030		48,590,529		2,150,385		2007	40 yrs.
602 Heron Drive	Bridgeport, NJ		—		524,728		2,240,478		7,650		524,728		2,248,128		2,772,856		715,965		1996	40 yrs.
245 Executive Drive	Brookfield, WI		—		577,067		5,197,903		3,893,747		577,067		9,091,650		9,668,717		2,867,338		1984	40 yrs.
15800 West Bluemound Road	Brookfield, WI		—		1,289,204		8,128,035		1,578,366		1,306,811		9,688,794		10,995,605		2,308,621		1994	40 yrs.
20700 Swenson Drive	Brookfield, WI		4,625,546		830,008		12,276,445		781,307		830,999		13,056,761		13,887,759		1,936,272		2005	40 yrs.
20800 Swenson Drive	Brookfield, WI		3,994,886		1,023,466		10,754,207		1,006,557		1,025,082		11,759,147		12,784,229		1,893,532		2005	40 yrs.
20935 Swenson Drive	Brookfield, WI		3,442,913		571,389		10,242,091		747,638		572,158		10,988,960		11,561,118		1,762,943		2005	40 yrs.
20975 Swenson Drive	Brookfield, WI		4,485,150		675,422		8,947,430		1,169,451		678,637		10,113,666		10,792,303		1,837,207		2005	40 yrs.
20825 Swenson Drive	Brookfield, WI		—		644,563		3,578,596		326,963		646,518		3,903,605		4,550,122		567,573		2006	40 yrs.
1485 W. Commerce Avenue	Carlisle, PA		—		4,249,868		13,886,039		2,241,825		4,095,262		16,282,471		20,377,733		2,728,243		2004	40 yrs.
3773 Corporate Parkway	Center Valley, PA		—		738,108				7,113,377		794,874		7,056,611		7,851,485		1,887,538		2001	40 yrs.
95 Kriner Road	Chambersburg, PA		—		8,695,501		—		29,151,481		9,407,871		28,439,111		37,846,982		1,565,316		2006	40 yrs.
12810 Virkler Drive	Charlotte, NC		—		475,368		2,367,586		54,921		475,368		2,422,507		2,897,874		—		2010	40 yrs.
1309 Executive Boulevard	Cheaspeake, VA		—		926,125				5,098,066		955,374		5,068,817		6,024,191		1,247,356		2001	40 yrs.
1305 Executive Boulevard	Chesapeake, VA		—		861,020				4,720,263		1,129,850		4,451,432		5,581,282		981,750		2002	40 yrs.
1313 Executive Boulevard	Chesapeake, VA		—		1,180,036				4,629,615		1,708,050		4,101,602		5,809,652		998,791		2002	40 yrs.
500 Independence Parkway	Chesapeake, VA		—		864,150		4,427,285		443,733		866,609		4,868,559		5,735,168		798,187		2004	40 yrs.
700 Independence Parkway	Chesapeake, VA		6,174,904		1,950,375		7,236,994		535,346		1,951,135		7,771,580		9,722,715		1,662,280		2004	40 yrs.
501 Independence Parkway	Chesapeake, VA		—		1,202,556		5,975,538		1,327,494		1,292,273		7,213,315		8,505,588		1,104,650		2005	40 yrs.
505 Independence Parkway	Chesapeake, VA		—		1,292,062		6,456,515		1,276,589		1,292,254		7,732,911		9,025,165		1,267,010		2005	40 yrs.
510 Independence Parkway	Chesapeake, VA		—		2,012,149		7,546,882		966,737		2,014,689		8,511,079		10,525,768		1,414,566		2005	40 yrs.
1301 Executive Boulevard	Chesapeake, VA		—		—		—		6,188,658		997,570		5,191,088		6,188,658		714,193		2005	40 yrs.
676 Independence Parkway	Chesapeake, VA		—		1,527,303		—		10,407,802		1,562,903		10,372,202		11,935,105		375,890		2006	40 yrs.
6230 Old Dobbin Lane	Colombia, MD		—		3,004,075		—		7,861,770		2,746,455		8,119,390		10,865,845		1,389,396		2004	40 yrs.
9101,9111,9115 Guilford Road	Columbia, MD		—		758,951		—		4,384,691		765,952		4,377,690		5,143,642		2,390,462		1984	40 yrs.
9125,9135,9145 Guilford Road	Columbia, MD		—		900,154		—		5,765,879		920,439		5,745,594		6,666,033		3,551,308		1983	40 yrs.
7178-80 Columbia Gateway	Columbia, MD		—		1,569,237		4,786,887		1,557,193		1,571,105		6,342,212		7,913,317		3,034,765		1987	40 yrs.
9770 Patuxent Woods Drive	Columbia, MD		—		341,663		3,033,309		1,876,157		341,663		4,909,466		5,251,129		1,668,493		1986	40 yrs.
9780 Patuxent Woods Drive	Columbia, MD		—		218,542		1,940,636		669,179		218,542		2,609,815		2,828,356		856,165		1986	40 yrs.
9790 Patuxent Woods Drive	Columbia, MD		—		243,791		2,164,094		360,288		243,791		2,524,382		2,768,173		841,490		1986	40 yrs.
9810 Patuxent Woods Drive	Columbia, MD		—		266,684		2,366,901		909,725		266,684		3,276,626		3,543,310		1,022,270		1986	40 yrs.
9800 Patuxent Woods Drive	Columbia, MD		—		299,099		2,654,069		693,028		299,099		3,347,097		3,646,197		1,085,979		1988	40 yrs.
9820 Patuxent Woods Drive	Columbia, MD		—		237,779		2,110,835		953,352		237,779		3,064,187		3,301,966		975,651		1988	40 yrs.
9830 Patuxent Woods Drive	Columbia, MD		—		296,262		2,628,933		582,878		296,262		3,211,811		3,508,073		1,075,810		1986	40 yrs.
8945-8975 Guilford Road	Columbia, MD		—		2,428,795		7,493,740		2,143,378		2,427,065		9,638,848		12,065,913		3,071,202		1986	40 yrs.
6250 Old Dobbin Lane	Columbia, MD		—		958,105				3,617,338		1,295,000		3,280,443		4,575,443		822,262		2002	40 yrs.
6200 Old Dobbin Lane	Columbia, MD		—		958,105				3,716,920		1,295,000		3,380,026		4,675,026		854,267		2002	40 yrs.
6210 Old Dobbin Lane	Columbia, MD		—		958,105				3,936,052		1,307,300		3,586,857		4,894,157		1,107,901		2002	40 yrs.
6250 Old Dobbin Lane	Columbia, MD		—		958,105				3,938,014		1,599,259		3,296,861		4,896,120		585,317		2000	40 yrs.
9755 Patuxent Woods Drive	Columbia, MD		—		3,917,094		14,959,075		3,142,376		3,922,382		18,096,163		22,018,545		3,483,259		2006	40 yrs.
6220 Old Dobbin Lane	Columbis, MD		—		3,865,848		—		7,741,067		3,166,951		8,439,964		11,606,915		893,106		2006	40 yrs.
1250 Hall Court	Deer Park, TX		2,887,908		829,570		4,778,327		47,398		831,611		4,823,685		5,655,296		537,788		2006	40 yrs.
170 Parkway West	Duncan, SC		—		598,348		3,643,756		126,879		598,918		3,770,065		4,368,983		556,253		2006	40 yrs.
190 Parkway West	Duncan, SC		—		551,663		3,310,993		209,022		552,211		3,519,466		4,071,678		493,195		2006	40 yrs.
265 Parkway East	Duncan, SC		—		901,444		5,751,389		18,391		902,374		5,768,850		6,671,224		940,104		2006	40 yrs.
285 Parkway East	Duncan, SC		—		975,433		5,851,990		318,001		976,393		6,169,031		7,145,424		718,293		2006	40 yrs.
3255 Neil Armstrong Boulevard	Eagan, MN		—		1,131,017		—		3,366,266		1,103,860		3,393,423		4,497,283		1,019,172		1998	40 yrs.
6321-6325 Bury Drive	Eden Prairie, MN		—		462,876		4,151,790		960,674		462,876		5,112,465		5,575,340		1,578,052		1988	40 yrs.
7660-7716 Golden Triangle Drive	Eden Prairie, MN		—		568,706		5,115,177		2,094,867		1,289,215		6,489,535		7,778,750		2,282,668		1988	40 yrs.
7400 Flying Cloud Drive	Eden Prairie, MN		—		195,982		1,762,027		1,066,844		768,344		2,256,509		3,024,853		669,661		1987	40 yrs.
10301-10305 West 70th Street	Eden Prairie, MN		—		120,622		1,085,226		407,233		118,300		1,494,781		1,613,081		498,869		1984	40 yrs.
10321 West 70th Street	Eden Prairie, MN		—		145,198		1,305,700		253,930		142,399		1,562,429		1,704,828		468,136		1984	40 yrs.
10333 West 70th Street	Eden Prairie, MN		—		110,746		995,868		279,138		108,610		1,277,142		1,385,752		434,055		1984	40 yrs.
10349-10357 West 70th Street	Eden Prairie, MN		—		275,903		2,481,666		480,014		270,584		2,966,999		3,237,582		1,098,940		1985	40 yrs.
10365-10375 West 70th Street	Eden Prairie, MN		—		291,077		2,618,194		391,586		285,464		3,015,393		3,300,857		1,115,447		1985	40 yrs.
10393-10394 West 70th Street	Eden Prairie, MN		—		269,618		2,423,318		807,298		264,419		3,235,815		3,500,235		1,151,828		1985	40 yrs.
7078 Shady Oak Road	Eden Prairie, MN		—		343,093		3,085,795		928,780		336,481		4,021,187		4,357,668		1,267,456		1985	40 yrs.
10400 Viking Drive	Eden Prairie, MN		—		2,912,391		—		22,099,352		2,938,372		22,073,370		25,011,743		7,401,528		1999	40 yrs.
7625 Smetana Lane	Eden Prairie, MN		—		4,500,641		—		2,987,320		1,916,609		5,571,353		7,487,962		693,360		2006	40 yrs.
7695-7699 Anagram Drive	Eden Prairie, MN		—		760,525		3,254,758		623,355		760,525		3,878,113		4,638,638		1,490,532		1997	40 yrs.
7800 Equitable Drive	Eden Prairie, MN		—		2,188,525		3,788,762		128,371		2,188,525		3,917,133		6,105,657		1,245,568		1993	40 yrs.
7905 Fuller Road	Eden Prairie, MN		—		1,229,862		4,075,167		1,980,136		1,230,965		6,054,200		7,285,165		1,951,366		1994	40 yrs.
9023 Columbine Road	Eden Prairie, MN		—		1,956,273		—		4,822,802		1,956,273		4,822,802		6,779,075		1,592,158		1999	40 yrs.
8967 Columbine Road	Eden Prairie, MN		—		1,450,000		—		3,575,107		1,450,000		3,575,107		5,025,107		1,122,027		2000	40 yrs.
7777 Golden Triangle Drive	Eden Prairie, MN		—		993,101		2,136,862		1,145,948		993,101		3,282,810		4,275,911		1,029,470		2000	40 yrs.
8937 Columbine Road	Eden Prairie, MN		—		1,325,829				4,191,274		1,739,966		3,777,137		5,517,103		973,945		2001	40 yrs.
7615 Smetana Lane	Eden Prairie, MN		—		1,011,517				8,510,179		3,000,555		6,521,141		9,521,696		1,891,508		2001	40 yrs.
8995 Columbine Road	Eden Prairie, MN		—		1,087,594				3,664,053		2,055,296		2,696,352		4,751,648		761,228		2001	40 yrs.
8911 Columbine Road (B2)	Eden Prairie, MN		—		916,687				3,782,331		1,718,407		2,980,611		4,699,018		712,167		2000	40 yrs.
8855 Columbine Road	Eden Prairie, MN		—		1,400,925				5,226,016		1,599,757		5,027,185		6,626,941		837,201		2000	40 yrs.
7075 Flying Cloud Drive	Eden Prairie, MN		—		10,232,831		10,855,851		53,337		10,243,977		10,898,042		21,142,019		1,045,470		2007	40 yrs.
7351 Coca Cola Drive	Elkridge, MD		—		1,897,044		—		6,154,082		3,023,417		5,027,709		8,051,126		(245,874	)	2006	40 yrs.

114

LIBERTY PROPERTY LIMITED PARTNERSHIP
REAL ESTATE AND ACCUMULATED DEPRECIATION
AS OF DECEMBER 31, 2010

								Costs
								Capitalized										Date of
								Subsequent		Gross Amount Carried at End of Period						Accumulated		Construction	Depreciable
				Initial Cost				to		Land and		Building and		Total		Depreciation		or	life
Project	Location	Encumbrances		Land		Building		Acquisition		Improvements		Improvements		12/31/2010		12/31/10		Acquisition	(years)
OPERATING PROPERTIES
180 Sheree Boulevard	Exton, PA		4,912,627		2,647,861		11,334,403		2,113,356		2,649,426		13,446,194		16,095,620		1,715,054	2007	40 yrs.
7028 Snowdrift Road	Fogelville, PA		—		520,473		959,279		157,281		524,390		1,112,644		1,637,033		305,730	1982	40 yrs.
420 Delaware Drive	Fort Washington, PA		—		2,766,931		—		8,290,952		2,826,994		8,230,889		11,057,884		1,043,789	2005	40 yrs.
414 Commerce Drive	Fort Washington, PA		—		1,267,194		2,217,460		329,544		1,267,937		2,546,260		3,814,197		411,754	2004	40 yrs.
275 Commerce Drive	Fort Washington, PA		—		1,775,894		2,160,855		7,453,925		1,790,041		9,600,633		11,390,674		838,469	2005	40 yrs.
1250 Virginia Drive	Fort Washington, PA		—		1,639,166		1,928,574		447,001		1,650,703		2,364,038		4,014,741		367,824	2005	40 yrs.
1100 Virginia Drive	Fort Washington, PA		—		35,619,946		51,390,540		15,920,254		36,374,955		66,555,784		102,930,739		7,272,746	2006	40 yrs.
106 Southchase Boulevard	Fountain Inn, SC		—		201,944		—		5,133,389		684,003		4,651,330		5,335,333		591,074	2005	40 yrs.
9601 Cosner Drive	Fredericksburg, VA		—		475,262		3,917,234		214,221		475,262		4,131,454		4,606,716		1,604,227	1995	40 yrs.
200 W Cypress Creek Road	Ft Lauderdale, FL		—		3,414,989		2,399,738		9,612,936		3,414,989		12,012,675		15,427,663		2,215,114	2003	40 yrs.
5410 - 5430 Northwest 33rd Avenue	Ft. Lauderdale, FL		—		603,776		4,176,238		1,188,682		625,111		5,343,586		5,968,696		1,950,986	1985	40 yrs.
4880 Cox Road	Glen Allen, VA		—		743,898		4,499,807		3,060,575		743,898		7,560,382		8,304,280		2,513,321	1995	40 yrs.
5000 Cox Road	Glen Allen, VA		—		770,214		3,685,248		241,155		771,029		3,925,588		4,696,617		1,463,680	1990	40 yrs.
5500 Cox Road	Glen Allen, VA		—		443,485		—		3,199,335		483,263		3,159,557		3,642,820		1,077,363	1999	40 yrs.
4801 Cox Road	Glen Allen, VA		—		1,072,896		—		10,561,112		1,075,620		10,558,388		11,634,008		3,773,270	1998	40 yrs.
4198 Cox Road	Glen Allen, VA		—		670,292		3,839,245		960,055		670,292		4,799,300		5,469,591		1,558,839	1984	40 yrs.
4510 Cox Road	Glen Allen, VA		—		1,010,024		7,151,729		1,428,858		1,010,044		8,580,567		9,590,611		3,022,299	1990	40 yrs.
4121 Cox Road	Glen Allen, VA		—		1,083,006		6,035,653		754,889		1,083,006		6,790,542		7,873,548		1,208,027	2004	40 yrs.
200 Southchase Boulevard	Greenville, SC		—		512,911				6,273,615		515,542		6,270,984		6,786,525		1,105,261	2003	40 yrs.
45 Brookfield Oaks Drive	Greenville, SC		—		818,114		—		3,545,588		825,529		3,538,173		4,363,702		291,245	2006	40 yrs.
116 Pleasant Ridge Road	Greenville, SC		—		1,547,811		—		13,779,580		3,712,683		11,614,708		15,327,391		707,040	2006	40 yrs.
7 Research Drive	Greenville, SC		—		—		17,091,882		4,405		—		17,096,287		17,096,287		1,721,813	2007	40 yrs.
1487 South Highway 101	Greer, SC		—		464,237		—		5,631,587		1,301,738		4,794,086		6,095,824		232,720	2007	40 yrs.
11841 Newgate Boulevard	Hagerstown, MD		—		3,356,207		—		30,555,755		9,741,685		24,170,277		33,911,962		1,082,575	2008	40 yrs.
1 Enterprise Parkway	Hampton, VA		—		974,675		5,579,869		1,430,422		974,675		7,010,291		7,984,966		2,256,731	1987	40 yrs.
22 Enterprise Parkway	Hampton, VA		—		1,097,368		6,760,778		1,149,934		1,097,368		7,910,712		9,008,080		2,531,828	1990	40 yrs.
5 Manhattan Square	Hampton, VA		—		207,368		—		1,535,913		212,694		1,530,586		1,743,281		487,934	1999	40 yrs.
1317 Executive Boulevard	Hampton, VA		—		1,650,423		—		7,819,255		1,128,829		8,340,849		9,469,678		1,060,866	2006	40 yrs.
21 Enterprise Parkway	Hampton, VA		—		263,668		8,167,118		640,550		265,719		8,805,617		9,071,336		2,253,821	1999	40 yrs.
521 Butler Farm Road	Hampton, VA		—		750,769		2,911,149		369,221		710,486		3,320,652		4,031,139		650,590	2003	40 yrs.
7317 Parkway Drive	Hanover, MD		—		1,104,359		1,959,671		25,658		1,104,359		1,985,329		3,089,688		594,468	1983	40 yrs.
7361 Coca Cola Drive	Hanover, MD		—		2,245,187		—		9,353,170		3,822,710		7,775,647		11,598,357		345,579	2004	40 yrs.
600 Industrial Drive	Harrisburg, PA		—		7,743,800		—		28,367,702		9,368,557		26,742,945		36,111,502		3,446,033	2005	40 yrs.
500 McCarthy Drive	Harrisburg, PA		*		5,194,872		19,991,436		4,518,658		5,687,013		24,017,953		29,704,966		4,595,442	2005	40 yrs.
4170 Mendenhall Oaks Parkway	High Point , NC		—		143,699		—		2,109,626		373,502		1,879,822		2,253,325		665,989	1999	40 yrs.
4180 Mendenhall Oaks Parkway	High Point , NC		—		121,329		—		1,620,276		315,614		1,425,991		1,741,605		442,317	1999	40 yrs.
4050 Piedmont Parkway	High Point , NC		—		801,902		—		20,677,603		2,042,159		19,437,347		21,479,505		6,672,869	1998	40 yrs.
4523 Green Point Drive	High Point, NC		—		234,564		—		3,393,949		235,698		3,392,816		3,628,513		1,449,631	1988	40 yrs.
4501 Green Point Drive	High Point, NC		—		319,289		—		2,466,168		320,450		2,465,007		2,785,457		1,255,878	1989	40 yrs.
4500 Green Point Drive	High Point, NC		—		230,622		—		2,111,872		231,692		2,110,803		2,342,494		1,068,491	1989	40 yrs.
4524 Green Point Drive	High Point, NC		—		182,810		—		2,376,534		183,888		2,375,456		2,559,344		1,129,562	1989	40 yrs.
4328, 4336 Federal Drive	High Point, NC		3,314,214		521,122		—		7,328,753		825,092		7,024,783		7,849,875		4,317,782	1995	40 yrs.
4344 Federal Drive	High Point, NC		—		484,001		—		2,656,217		173,623		2,966,595		3,140,218		1,260,185	1996	40 yrs.
4000 Piedmont Parkway	High Point, NC		—		592,885		4,825,615		669,468		597,368		5,490,600		6,087,969		2,180,600	1989	40 yrs.
4380 Federal Drive	High Point, NC		—		282,996		—		2,033,400		283,368		2,033,028		2,316,396		799,262	1997	40 yrs.
4388 Federal Drive	High Point, NC		—		143,661		—		1,057,225		132,655		1,068,231		1,200,886		382,264	1997	40 yrs.
4160 Mendenhall Oaks Parkway	High Point, NC		—		285,882		—		3,037,383		545,627		2,777,638		3,323,265		880,113	1998	40 yrs.
4194 Mendenhall Oaks Parkway	High Point, NC		—		102,372		—		2,466,427		265,991		2,302,808		2,568,799		844,753	1999	40 yrs.
4196 Mendenhall Oaks Parkway	High Point, NC		—		66,731		—		2,092,124		173,889		1,984,966		2,158,855		684,926	1999	40 yrs.
4300 Federal Drive	High Point, NC		—		264,038		—		2,226,497		276,038		2,214,497		2,490,534		600,059	1998	40 yrs.
4135 Mendenall Oaks Parkway	High Point, NC		—		499,500		—		3,447,995		500,980		3,446,515		3,947,495		1,151,155	2000	40 yrs.
1498 Eagle Hill Drive	High Point, NC		—		94,274		—		6,127,302		791,880		5,429,696		6,221,576		492,375	2005	40 yrs.
4183 Eagle Hill Drive	High Point, NC		—		122,203				3,263,729		526,266		2,859,666		3,385,932		1,018,058	2001	40 yrs.
4189 Eagle Hill Drive	High Point, NC		—		100,106				3,432,266		431,106		3,101,266		3,532,372		1,043,576	2001	40 yrs.
4020 Meeting Way	High Point, NC		—		94,232				1,682,549		378,101		1,398,680		1,776,781		441,483	2001	40 yrs.
1400 Mendenhall Oaks Parkway	High Point, NC		—		172,320				7,016,383		984,672		6,204,031		7,188,704		1,580,430	2002	40 yrs.
4191 Mendenhall Oaks Parkway	High Point, NC		—		217,943				3,007,486		611,166		2,614,263		3,225,429		627,812	2002	40 yrs.
4015 Meeting Way	High Point, NC		—		510,000		—		2,780,599		511,869		2,778,730		3,290,599		433,881	2003	40 yrs.
4195 Eagle Hill Drive	High Point, NC		—		107,586		—		3,584,254		505,700		3,186,140		3,691,840		523,533	2004	40 yrs.
400 Mendenhall Oaks Parkway	High Point, NC		—		—		—		1,973,021		665,239		1,307,782		1,973,021		147,305	2004	40 yrs.
4475 Premier Drive	High Point, NC		—		748,693		—		6,801,791		1,525,421		6,025,063		7,550,484		374,361	2006	40 yrs.
100 Witmer Road	Horsham, PA		—		3,102,784		—		20,104,942		3,764,784		19,442,942		23,207,726		4,720,873	1996	40 yrs.
132 Welsh Road	Horsham, PA		—		1,333,642		—		4,039,073		1,408,041		3,964,674		5,372,715		1,368,709	1998	40 yrs.
300 Welsh Road — Building 3	Horsham, PA		—		180,459		1,441,473		558,090		180,459		1,999,563		2,180,022		626,642	1983	40 yrs.
300 Welsh Road — Building 4	Horsham, PA		—		282,493		2,256,508		1,804,507		282,493		4,061,015		4,343,508		1,362,227	1983	40 yrs.
2 Walnut Grove Drive	Horsham, PA		—		1,281,870		7,767,374		1,343,251		1,265,363		9,127,132		10,392,495		3,411,586	1989	40 yrs.
5 Walnut Grove Drive	Horsham, PA		—		1,065,951		—		9,979,535		1,939,712		9,105,774		11,045,486		2,506,444	2000	40 yrs.
200 Gibraltar Road	Horsham, PA		—		638,513		5,811,323		1,184,244		638,513		6,995,567		7,634,080		2,350,191	1990	40 yrs.
220 Gibraltar Road	Horsham, PA		—		629,944		5,733,228		1,159,203		629,944		6,892,431		7,522,375		2,706,844	1990	40 yrs.
240 Gibraltar Road	Horsham, PA		—		629,944		5,733,234		1,844,399		629,944		7,577,633		8,207,577		3,290,787	1990	40 yrs.
1 Walnut Grove Drive	Horsham, PA		—		1,058,901		5,343,606		378,615		1,058,901		5,722,221		6,781,122		1,966,851	1986	40 yrs.
181-187 Gibraltar Road	Horsham, PA		—		360,549		3,259,984		787,154		360,549		4,047,138		4,407,687		1,541,736	1982	40 yrs.
104 Rock Road	Horsham, PA		—		330,111		2,981,669		594,916		330,111		3,576,586		3,906,696		1,236,229	1974	40 yrs.

115

LIBERTY PROPERTY LIMITED PARTNERSHIP
REAL ESTATE AND ACCUMULATED DEPRECIATION
AS OF DECEMBER 31, 2010

								Costs
								Capitalized										Date of
								Subsequent		Gross Amount Carried at End of Period						Accumulated		Construction	Depreciable
				Initial Cost				to		Land and		Building and		Total		Depreciation		or	life
Project	Location	Encumbrances		Land		Building		Acquisition		Improvements		Improvements		12/31/2010		12/31/10		Acquisition	(years)
OPERATING PROPERTIES
123-135 Rock Road	Horsham, PA		—		292,360		2,411,677		2,040,774		393,019		4,351,791		4,744,810		1,183,589	1975	40 yrs.
111-159 Gibraltar Road	Horsham, PA		—		489,032		4,126,151		1,143,504		489,032		5,269,655		5,758,687		1,871,705	1981	40 yrs.
161-175 Gibraltar Road	Horsham, PA		—		294,673		2,663,722		931,107		294,673		3,594,829		3,889,502		1,251,908	1976	40 yrs.
103-109 Gibraltar Road	Horsham, PA		—		270,906		2,448,500		348,986		270,906		2,797,486		3,068,392		967,476	1978	40 yrs.
261-283 Gibraltar Road	Horsham, PA		—		464,871		3,951,972		1,781,426		464,871		5,733,397		6,198,268		1,675,874	1978	40 yrs.
210-223 Witmer Road	Horsham, PA		—		270,282		2,441,276		1,748,169		270,282		4,189,445		4,459,727		1,431,794	1972	40 yrs.
231-237 Gibraltar Road	Horsham, PA		—		436,952		3,948,963		982,690		436,952		4,931,653		5,368,605		1,693,057	1981	40 yrs.
100 Gibraltar Road	Horsham, PA		—		38,729		349,811		9,589		38,729		359,400		398,129		117,388	1975	40 yrs.
101 Gibraltar Road	Horsham, PA		—		651,990		5,888,989		1,344,093		732,552		7,152,520		7,885,072		2,457,858	1977	40 yrs.
506 Prudential Road	Horsham, PA		—		208,140		895,470		894,621		208,140		1,790,091		1,998,231		572,733	1973	40 yrs.
113-123 Rock Road	Horsham, PA		—		351,072		3,171,001		724,193		451,731		3,794,535		4,246,266		1,188,157	1975	40 yrs.
101-111 Rock Road	Horsham, PA		—		350,561		3,166,389		1,144,743		452,251		4,209,443		4,661,693		1,430,849	1975	40 yrs.
120 Gibraltar Road	Horsham, PA		—		533,142		4,830,515		2,188,624		558,142		6,994,139		7,552,281		2,252,157	1980	40 yrs.
110 Gibraltar Road	Horsham, PA		—		673,041		5,776,369		2,412,155		673,041		8,188,524		8,861,565		2,968,854	1979	40 yrs.
100-107 Lakeside Drive	Horsham, PA		—		239,528		2,163,498		441,510		255,528		2,589,008		2,844,536		838,125	1982	40 yrs.
200-264 Lakeside Drive	Horsham, PA		—		502,705		4,540,597		2,077,571		502,705		6,618,168		7,120,873		1,874,297	1982	40 yrs.
300-309 Lakeside Drive	Horsham, PA		—		369,475		3,338,761		2,033,132		376,475		5,364,892		5,741,368		2,168,644	1982	40 yrs.
400-445 Lakeside Drive	Horsham, PA		—		543,628		4,910,226		2,433,284		583,628		7,303,511		7,887,138		2,566,697	1981	40 yrs.
104 Witmer Road	Horsham, PA		—		1,248,148		—		597,911		189,793		1,656,266		1,846,059		512,431	1975	40 yrs.
201 Gibraltar Road	Horsham, PA		—		380,127		3,433,433		2,012,789		380,802		5,445,547		5,826,349		1,789,949	1983	40 yrs.
719 Dresher Road	Horsham, PA		—		493,426		2,812,067		207,803		495,112		3,018,184		3,513,297		965,932	1987	40 yrs.
4 Walnut Grove	Horsham, PA		—		2,515,115		—		10,809,109		2,515,115		10,809,109		13,324,224		2,926,610	1999	40 yrs.
300 Welsh Road	Horsham, PA		—		696,061		3,339,991		570,429		696,061		3,910,420		4,606,480		1,363,559	1985	40 yrs.
700 Dresher Road	Horsham, PA		—		2,551,777		3,020,638		1,790,780		2,565,140		4,798,056		7,363,195		1,361,027	1987	40 yrs.
680 Blair Mill Road	Horsham, PA		—		3,527,151				17,473,670		4,138,577		16,862,244		21,000,821		3,245,331	2001	40 yrs.
102 Rock Road	Horsham, PA		—		1,110,209		2,301,302		1,133,191		1,114,985		3,429,717		4,544,702		850,586	1985	40 yrs.
335 Commerce Drive	Horsham, PA		—		—		—		8,797,278		182,400		8,614,878		8,797,278		1,796,267	2002	40 yrs.
255 Business Center Drive	Horsham, PA		—		1,154,289		2,007,214		630,669		1,140,597		2,651,574		3,792,171		581,561	2003	40 yrs.
355 Business Center Drive	Horsham, PA		—		483,045		898,798		364,660		471,171		1,275,332		1,746,503		334,557	2003	40 yrs.
455 Business Center Drive	Horsham, PA		—		1,351,011		2,503,449		1,531,087		1,322,317		4,063,231		5,385,547		1,132,169	2003	40 yrs.
555 Business Center Drive	Horsham, PA		—		727,420		1,353,650		431,004		709,967		1,802,108		2,512,075		277,846	2003	40 yrs.
7 Walnut Grove Drive	Horsham, PA		—		2,631,696		—		18,525,660		2,631,956		18,525,400		21,157,356		1,577,227	2006	40 yrs.
747 Dresher Road	Horsham, PA		—		1,607,238		—		4,724,241		1,607,977		4,723,501		6,331,479		2,500,825	1988	40 yrs.
507 Prudential Road	Horsham, PA		—		644,900		5,804,100		8,408,030		1,131,380		13,725,650		14,857,030		5,058,217	1988	40 yrs.
767 Electronic Drive	Horsham, PA		—		1,229,685		—		2,436,397		1,241,970		2,424,112		3,666,082		972,152	1996	40 yrs.
16445 Air Center Boulevard	Houston, TX		*		363,339		2,509,186		163,721		363,339		2,672,908		3,036,247		859,120	1997	40 yrs.
16405 Air Center Boulevard	Houston, TX		*		438,853		3,030,396		339,899		438,853		3,370,294		3,809,147		1,178,648	1997	40 yrs.
16580 Air Center Boulevard	Houston, TX		*		289,000		3,559,857		246,977		289,000		3,806,834		4,095,834		1,111,779	1997	40 yrs.
1755 Trans Central Drive	Houston, TX		*		293,534		3,036,269		146,851		306,147		3,170,506		3,476,653		834,764	1999	40 yrs.
16680 Central Green Boulevard	Houston, TX		*		311,952		—		4,153,893		492,869		3,972,975		4,465,845		368,224	2001	40 yrs.
16605 Air Center Boulevard	Houston, TX		*		298,999				3,328,180		496,186		3,130,994		3,627,180		685,028	2002	40 yrs.
10739 West Little York Road	Houston, TX		*		797,931		5,950,894		148,370		799,560		6,097,635		6,897,195		1,286,211	1999	40 yrs.
10735 West Little York Road	Houston, TX		*		1,110,988		6,351,946		1,638,126		1,135,483		7,965,577		9,101,060		1,512,982	2000	40 yrs.
8801-19 & 8821-49 Fallbrook Drive	Houston, TX		*		2,290,001		15,297,141		1,927,534		2,290,002		17,224,674		19,514,676		3,288,526	2000	40 yrs.
16685 Air Center Boulevard	Houston, TX		*		—		—		2,887,715		414,691		2,473,024		2,887,715		419,524	2004	40 yrs.
8825-8839 N Sam Houston Pkwy	Houston, TX		*		638,453		3,258,815		653,425		638,477		3,912,215		4,550,692		876,801	2004	40 yrs.
8850-8872 Fallbrook Drive	Houston, TX		*		504,317		2,878,351		1,014,679		504,341		3,893,006		4,397,347		947,067	2004	40 yrs.
8802-8824 Fallbrook Drive	Houston, TX		*		2,774,995		6,364,767		1,143,271		2,775,021		7,508,011		10,283,032		1,432,118	2004	40 yrs.
16602 Central Green Boulevard	Houston, TX		*		284,403		—		4,495,522		503,779		4,276,146		4,779,925		583,405	2005	40 yrs.
1646 Rankin Road	Houston, TX		*		329,961		—		4,895,132		592,234		4,632,859		5,225,093		789,638	2005	40 yrs.
8301 Fallbrook Drive	Houston, TX		*		4,515,862		—		23,946,674		5,877,884		22,584,652		28,462,536		1,625,499	2006	40 yrs.
5200 N. Sam Houston Parkway	Houston, TX		*		1,519,458		7,135,548		3,490,870		1,520,074		10,625,802		12,145,877		1,061,203	2007	40 yrs.
5250 N. Sam Houston Parkway	Houston, TX		*		2,173,287		8,868,256		2,265,109		2,173,942		11,132,710		13,306,652		971,211	2007	40 yrs.
11201 Greens Crossing Boulevard	Houston, TX		*		1,006,194		5,412,584		2,687,416		1,008,542		8,097,651		9,106,193		877,726	2007	40 yrs.
850 Greens Parkway	Houston, TX		*		2,893,405		11,593,197		2,680,294		2,899,861		14,267,034		17,166,895		1,122,286	2007	40 yrs.
860 Greens Parkway	Houston, TX		*		1,399,365		6,344,650		1,524,550		1,374,012		7,894,553		9,268,565		642,653	2007	40 yrs.
10301 Round Up Lane	Houston, TX		—		545,501		2,927,700		189,451		545,501		3,117,150		3,662,651		—	2010	40 yrs.
10305 Round Up Lane	Houston, TX		—		1,340,609		7,489,720		621,689		1,340,609		8,111,408		9,452,017		—	2010	40 yrs.
20 Wright Avenue	Hunt Valley, MD		—		1,205,946		—		9,948,585		1,861,025		9,293,506		11,154,531		2,644,871	2001	40 yrs.
4 North Park Drive	Hunt Valley, MD		—		3,269,948		13,551,370		2,495,995		3,269,948		16,047,365		19,317,313		3,060,651	2003	40 yrs.
6 North Park Drive	Hunt Valley, MD		—		2,077,949		8,770,566		1,182,528		2,077,949		9,953,094		12,031,044		2,296,058	2003	40 yrs.
10 North Park Drive	Hunt Valley, MD		—		2,211,969		7,816,042		3,212,810		2,211,969		11,028,852		13,240,821		1,584,542	2003	40 yrs.
307 International Circle	Hunt Valley, MD		—		3,538,319		14,190,832		13,368,615		3,542,881		27,554,885		31,097,766		4,709,104	2004	40 yrs.
309 International Circle	Hunt Valley, MD		—		613,667		2,458,204		705,184		615,096		3,161,959		3,777,055		507,444	2004	40 yrs.
311 International Circle	Hunt Valley, MD		—		313,365		1,281,093		76,921		314,572		1,356,807		1,671,380		181,978	2004	40 yrs.
8775 Baypine Road	Jacksonville, FL		—		906,804		—		9,784,270		913,013		9,778,061		10,691,074		3,210,331	1989	40 yrs.
8665,8667,8669 Baypine Road	Jacksonville, FL		—		966,552		—		5,395,612		974,959		5,387,205		6,362,164		2,809,899	1987	40 yrs.
7077 Bonneval Road	Jacksonville, FL		—		768,000		5,789,000		2,286,322		774,020		8,069,302		8,843,322		3,685,361	1988	40 yrs.
4190 Belfort Road	Jacksonville, FL		—		821,000		5,866,000		2,174,368		827,420		8,033,948		8,861,368		3,162,603	1986	40 yrs.
7020 AC Skinner Parkway	Jacksonville, FL		—		398,257		—		2,328,602		749,811		1,977,048		2,726,859		809,178	1996	40 yrs.
7022 AC Skinner Parkway	Jacksonville, FL		—		706,934		—		2,984,235		853,981		2,837,188		3,691,169		1,111,945	1996	40 yrs.
4345 Southpoint Parkway	Jacksonville, FL		—		—		—		8,339,915		418,093		7,921,822		8,339,915		2,551,053	1998	40 yrs.
7016 AC Skinner Parkway	Jacksonville, FL		—		597,181		—		2,373,250		602,633		2,367,799		2,970,431		1,237,846	1996	40 yrs.

116

LIBERTY PROPERTY LIMITED PARTNERSHIP
REAL ESTATE AND ACCUMULATED DEPRECIATION
AS OF DECEMBER 31, 2010

								Costs
								Capitalized											Date of
								Subsequent			Gross Amount Carried at End of Period						Accumulated		Construction	Depreciable
				Initial Cost				to			Land and		Building and		Total		Depreciation		or	life
Project	Location	Encumbrances		Land		Building		Acquisition			Improvements		Improvements		12/31/2010		12/31/10		Acquisition	(years)
OPERATING PROPERTIES
7018 AC Skinner Parkway	Jacksonville, FL		—		840,996		—		3,583,342			846,461		3,577,877		4,424,338		1,312,357	1997	40 yrs.
7014 AC Skinner Parkway	Jacksonville, FL		—		574,198		—		3,099,770			780,486		2,893,482		3,673,968		1,065,864	1999	40 yrs.
6600 Southpoint Parkway	Jacksonville, FL		—		998,432		4,055,727		903,983			1,002,704		4,955,438		5,958,142		2,027,804	1986	40 yrs.
6700 Southpoint Parkway	Jacksonville, FL		—		620,719		2,989,746		182,927			624,215		3,169,178		3,793,392		1,137,378	1987	40 yrs.
4801 Executive Park Court - 100	Jacksonville, FL		—		554,993		2,993,277		280,904			554,542		3,274,631		3,829,174		1,058,497	1990	40 yrs.
4801 Executive Park Court - 200	Jacksonville, FL		—		370,017		1,995,518		186,685			370,039		2,182,181		2,552,220		737,616	1990	40 yrs.
4810 Executive Park Court	Jacksonville, FL		—		369,694		3,045,639		657,134			370,039		3,702,428		4,072,467		1,264,353	1990	40 yrs.
6602 Executive Park Court - 100	Jacksonville, FL		—		388,519		2,095,293		293,659			388,541		2,388,930		2,777,471		816,571	1993	40 yrs.
6602 Executive Park Court - 200	Jacksonville, FL		—		296,014		1,596,347		388,955			296,032		1,985,284		2,281,316		674,612	1993	40 yrs.
6631 Executive Park Court - 100	Jacksonville, FL		—		251,613		1,356,849		379,477			251,627		1,736,312		1,987,939		782,928	1994	40 yrs.
6631 Executive Park Court - 200	Jacksonville, FL		—		406,561		2,195,070		400,092			407,043		2,594,680		3,001,723		927,069	1994	40 yrs.
4815 Executive Park Court - 100	Jacksonville, FL		—		366,317		1,975,393		106,854			366,339		2,082,225		2,448,564		710,529	1995	40 yrs.
4815 Executive Park Court - 200	Jacksonville, FL		—		462,522		2,494,397		350,687			462,549		2,845,056		3,307,606		885,962	1995	40 yrs.
4825 Executive Park Court	Jacksonville, FL		—		601,278		3,242,491		50,343			601,401		3,292,711		3,894,112		1,094,002	1996	40 yrs.
4820 Executive Park Court	Jacksonville, FL		—		555,173		2,693,130		609,686			555,213		3,302,777		3,857,989		1,148,284	1997	40 yrs.
6601 Executive Park Circle North	Jacksonville, FL		—		551,250		3,128,361		272,737			551,250		3,401,098		3,952,348		1,064,669	1992	40 yrs.
4901 Belfort Road	Jacksonville, FL		—		877,964		2,360,742		1,896,775			877,964		4,257,517		5,135,481		1,580,051	1986	40 yrs.
4875 Belfort Road	Jacksonville, FL		—		2,089,347		—		13,024,417			2,287,152		12,826,612		15,113,764		902,933	1998	40 yrs.
4899 Belfort Road	Jacksonville, FL		—		1,299,201		—		7,893,940			1,168,062		8,025,079		9,193,141		2,385,293	2000	40 yrs.
4905 Belfort Street	Jacksonville, FL		—		638,154		—		3,257,563			641,272		3,254,446		3,895,717		956,755	2000	40 yrs.
7251 Salisbury Road	Jacksonville, FL		—		—		—		3,311,699			662,559		2,649,140		3,311,699		638,611	2000	40 yrs.
10245 Centurion Parkway North	Jacksonville, FL		—		852,644		3,510,889		815,879			853,704		4,325,708		5,179,412		1,302,193	1996	40 yrs.
4887 Belfort Road	Jacksonville, FL		—		1,299,202				7,870,835			1,665,915		7,504,122		9,170,037		2,290,667	2002	40 yrs.
7255 Salisbury Road	Jacksonville, FL		—		392,060				2,639,416			680,766		2,350,710		3,031,476		604,262	2002	40 yrs.
5201 Gate Parkway	Jacksonville, FL		—		3,836,532		—		21,433,694			4,269,346		21,000,880		25,270,226		3,613,901	2005	40 yrs.
3200 Horizon Drive	King of Prussia, PA		—		928,637		—		5,732,526			1,210,137		5,451,025		6,661,162		1,707,805	1996	40 yrs.
440 East Swedesford Road	King of Prussia, PA		—		717,001		4,816,121		2,415,377			717,001		7,231,499		7,948,499		2,853,747	1988	40 yrs.
460 East Swedesford Road	King of Prussia, PA		—		705,317		4,737,487		4,023,707			705,317		8,761,195		9,466,511		2,769,154	1988	40 yrs.
151 South Warner Road	King of Prussia, PA		—		1,218,086		6,937,866		7,153,361			1,187,900		14,121,413		15,309,313		1,001,048	1980	40 yrs.
3604 Horizon Drive	King of Prussia, PA		—		397,178		—		1,590,663			350,874		1,636,967		1,987,841		446,303	1998	40 yrs.
650 Swedesford Road	King of Prussia, PA		—		952,911		6,722,830		7,770,167			952,911		14,492,996		15,445,907		5,467,867	1971	40 yrs.
680 Swedesford Road	King of Prussia, PA		—		952,361		6,722,830		6,936,819			952,361		13,659,650		14,612,010		4,892,817	1971	40 yrs.
3600 Horizon Drive	King of Prussia, PA		—		236,432		1,856,252		784,645			236,432		2,640,897		2,877,328		1,034,596	1989	40 yrs.
3602 Horizon Drive	King of Prussia, PA		—		217,734		1,759,489		263,517			217,809		2,022,931		2,240,740		734,434	1989	40 yrs.
2700 Horizon Drive	King of Prussia, PA		—		764,370		—		3,643,566			867,815		3,540,121		4,407,936		1,092,503	1998	40 yrs.
2900 Horizon Drive	King of Prussia, PA		—		679,440		—		3,503,074			774,096		3,408,418		4,182,514		1,282,774	1998	40 yrs.
2500 Renaissance Boulevard	King of Prussia, PA		—		509,580		—		2,580,729			592,886		2,497,422		3,090,309		980,216	1999	40 yrs.
2300 Renaissance Boulevard	King of Prussia, PA		—		509,580		—		3,042,297			574,152		2,977,725		3,551,877		1,152,908	1999	40 yrs.
2100 Renaissance Boulevard	King of Prussia, PA		—		1,110,111		—		8,386,799			1,132,519		8,364,391		9,496,911		2,455,413	1999	40 yrs.
3400 Horizon Drive	King of Prussia, PA		—		776,496		3,139,068		977,199			776,496		4,116,267		4,892,763		1,287,288	1995	40 yrs.
2301 Renaissance Boulevard	King of Prussia, PA		—		1,645,246		—		30,063,879			4,581,649		27,127,475		31,709,124		7,956,354	2002	40 yrs.
2520 Renaissance Boulevard	King of Prussia, PA		—		1,020,000		—		4,621,206			978,402		4,662,804		5,641,206		1,516,106	1999	40 yrs.
2201 Renaissance Boulevard	King of Prussia, PA		—		—		—		17,600,911			2,413,514		15,187,397		17,600,911		3,744,703	2000	40 yrs.
2560 Renaissance Boulevard	King of Prussia, PA		—		—		—		3,729,254			649,792		3,079,462		3,729,254		1,133,697	2000	40 yrs.
180 South Warner Drive	King of Prussia, PA		—		—		—		9,533,659			—		9,533,659		9,533,659		99,167	2009	40 yrs.
170 South Warner Road	King of Prussia, PA		—		547,800		3,137,400		2,515,288			458,232		5,742,256		6,200,488		2,703,554	1980	40 yrs.
190 South Warner Road	King of Prussia, PA		—		552,200		3,162,600		1,039,347			461,909		4,292,237		4,754,147		1,763,715	1980	40 yrs.
3100 Horizon Drive	King of Prussia, PA		—		601,956		—		1,758,484			611,436		1,749,005		2,360,441		624,398	1995	40 yrs.
3500 Horizon Drive	King of Prussia, PA		—		1,204,839		—		2,830,072			1,223,875		2,811,036		4,034,911		970,905	1996	40 yrs.
3000 Horizon Drive	King of Prussia, PA		—		1,191,449		—		2,476,299			946,703		2,721,045		3,667,748		818,211	1997	40 yrs.
11425 State Highway 225	LaPorte, TX		*		975,974		3,409,036		8,956			977,542		3,416,424		4,393,966		461,715	2006	40 yrs.
11503 State Highway 225	LaPorte, TX		*		2,561,931		9,695,493		184,312			2,566,047		9,875,690		12,441,736		1,075,351	2006	40 yrs.
7528 Walker Way	Lehigh Valley, PA		—		893,441		—		5,510,456			779,330		5,624,568		6,403,897		1,004,672	2004	40 yrs.
8500 Willard Drive	Lehigh, PA		—		6,398,815		—		21,794,707			7,627,526		20,565,997		28,193,522		1,359,631	2004	40 yrs.
8301 Industrial Boulevard	Lehigh, PA		—		11,249,550		—		44,324,333			11,254,716		44,319,167		55,573,883		5,774,422	2005	40 yrs.
31700 Research Park Drive	Madison Heights, MI		—		373,202		1,824,721		(649,436	)		373,203		1,175,284		1,548,487		640,074	1988	40 yrs.
1901 Summit Tower Boulevard	Maitland, FL		—		6,078,791		12,348,567		2,047,678			6,083,206		14,391,831		20,475,037		4,729,802	1998	40 yrs.
45-67 Great Valley Parkway	Malvern, PA		—		795,143		—		4,051,620			795,831		4,050,932		4,846,763		2,511,028	1974	40 yrs.
11,15 Great Valley Parkway	Malvern, PA		—		1,837,050		—		14,959,980			1,837,878		14,959,152		16,797,030		10,849,584	1986	40 yrs.
27-43 Great Valley Parkway	Malvern, PA		—		448,775		—		2,365,913			449,447		2,365,241		2,814,688		1,638,179	1977	40 yrs.
1 Country View Road	Malvern, PA		—		400,000		3,600,000		437,856			406,421		4,031,435		4,437,856		1,620,776	1982	40 yrs.
200 Chesterfield Parkway	Malvern, PA		—		495,893		2,739,093		578,651			588,384		3,225,253		3,813,637		2,264,448	1989	40 yrs.
50 Morehall Road	Malvern, PA		—		849,576		—		13,051,932			1,337,076		12,564,432		13,901,508		5,780,886	1997	40 yrs.
1 Great Valley Parkway	Malvern, PA		—		419,460		3,792,570		448,271			419,460		4,240,841		4,660,301		1,406,540	1982	40 yrs.
5 Great Valley Parkway	Malvern, PA		—		684,200		6,181,661		1,594,859			684,200		7,776,520		8,460,720		2,644,135	1983	40 yrs.
1001 Cedar Hollow Road	Malvern, PA		—		1,436,814		—		16,081,159			1,676,470		15,841,503		17,517,973		6,710,183	1998	40 yrs.
3 Country View Road	Malvern, PA		—		814,278		—		4,946,433			1,128,881		4,631,830		5,760,711		1,447,364	1998	40 yrs.
425 Technology Drive	Malvern, PA		—		191,114		—		1,571,119			321,473		1,440,760		1,762,233		480,323	1998	40 yrs.
375 Technology Drive	Malvern, PA		—		191,114		—		1,616,195			234,922		1,572,387		1,807,309		508,813	1998	40 yrs.
45 Liberty Boulevard	Malvern, PA		—		4,380,221		—		15,316,168			4,749,748		14,946,641		19,696,389		6,333,780	1999	40 yrs.
100 Chesterfield Parkway	Malvern, PA		—		1,320,625		—		6,709,379			1,451,139		6,578,865		8,030,004		2,967,620	1998	40 yrs.
600 Chesterfield Parkway	Malvern, PA		—		2,013,750		—		8,255,848			2,171,080		8,098,519		10,269,598		3,451,850	1999	40 yrs.
700 Chesterfield Parkway	Malvern, PA		—		2,013,750		—		8,216,674			2,158,337		8,072,087		10,230,424		3,425,023	1999	40 yrs.

117

LIBERTY PROPERTY LIMITED PARTNERSHIP
REAL ESTATE AND ACCUMULATED DEPRECIATION
AS OF DECEMBER 31, 2010

								Costs
								Capitalized										Date of
								Subsequent		Gross Amount Carried at End of Period						Accumulated		Construction	Depreciable
				Initial Cost				to		Land and		Building and		Total		Depreciation		or	life
Project	Location	Encumbrances		Land		Building		Acquisition		Improvements		Improvements		12/31/2010		12/31/10		Acquisition	(years)
OPERATING PROPERTIES
18 Great Valley Parkway	Malvern, PA		—		394,036		3,976,221		99,539		397,293		4,072,504		4,469,796		1,230,874	1980	40 yrs.
11 Great Valley Parkway	Malvern, PA		—		496,297		—		3,227,678		708,331		3,015,644		3,723,975		947,673	2001	40 yrs.
40 Liberty Boulevard	Malvern, PA		—		4,241,137		17,737,090		2,182,842		4,241,167		19,919,901		24,161,068		7,048,952	1989	40 yrs.
2 West Liberty Boulevard	Malvern, PA		—		5,405,041		—		11,668,182		5,405,042		11,668,182		17,073,224		2,050,056	2003	40 yrs.
10 Great Valley Parkway	Malvern, PA		—		823,540		1,341,376		441,767		832,244		1,774,439		2,606,683		377,847	2003	40 yrs.
10, 20 Liberty Boulevard	Malvern, PA		—		724,058		—		5,339,789		724,846		5,339,001		6,063,847		2,671,964	1985	40 yrs.
420 Lapp Road	Malvern, PA		—		1,054,418		—		7,172,977		1,055,243		7,172,152		8,227,395		3,591,164	1989	40 yrs.
14 Lee Boulevard	Malvern, PA		—		664,282		—		5,569,322		643,892		5,589,712		6,233,604		3,088,228	1988	40 yrs.
500 Chesterfield Parkway	Malvern, PA		—		472,364		—		2,839,137		519,742		2,791,760		3,311,501		1,459,917	1988	40 yrs.
300-400 Chesterfield Parkway	Malvern, PA		—		937,212		—		4,998,361		1,012,843		4,922,731		5,935,573		2,592,952	1988	40 yrs.
40 Valley Stream Parkway	Malvern, PA		—		322,918		—		3,233,318		325,775		3,230,461		3,556,236		1,979,657	1987	40 yrs.
50 Valley Stream Parkway	Malvern, PA		—		323,971		—		3,112,784		323,792		3,112,964		3,436,755		1,723,526	1987	40 yrs.
20 Valley Stream Parkway	Malvern, PA		—		465,539		—		5,309,203		466,413		5,308,329		5,774,742		3,213,237	1987	40 yrs.
257-275 Great Valley Parkway	Malvern, PA		—		504,611		—		4,583,549		505,458		4,582,702		5,088,160		2,988,275	1983	40 yrs.
300 Technology Drive	Malvern, PA		—		368,626		—		1,344,816		374,497		1,338,945		1,713,442		832,359	1985	40 yrs.
277-293 Great Valley Parkway	Malvern, PA		—		530,729		—		2,370,515		531,534		2,369,710		2,901,244		1,428,758	1984	40 yrs.
311 Technology Drive	Malvern, PA		—		397,131		—		2,846,006		397,948		2,845,189		3,243,137		1,717,478	1984	40 yrs.
7 Great Valley Parkway	Malvern, PA		—		176,435		—		4,316,950		177,317		4,316,068		4,493,385		2,563,412	1985	40 yrs.
55 Valley Stream Parkway	Malvern, PA		—		215,005		—		4,134,390		215,818		4,133,578		4,349,395		2,481,839	1983	40 yrs.
65 Valley Stream Parkway	Malvern, PA		—		381,544		—		6,715,903		382,361		6,715,086		7,097,447		4,337,741	1983	40 yrs.
508 Lapp Road	Malvern, PA		—		331,392		—		1,680,547		332,216		1,679,723		2,011,939		1,099,532	1984	40 yrs.
10 Valley Stream Parkway	Malvern, PA		—		509,075		—		2,787,619		509,899		2,786,796		3,296,694		1,670,677	1984	40 yrs.
333 Phoenixville Pike	Malvern, PA		—		523,530		—		3,708,843		524,230		3,708,143		4,232,373		1,937,657	1985	40 yrs.
30 Great Valley Parkway	Malvern, PA		—		128,126		—		350,938		128,783		350,281		479,064		310,396	1975	40 yrs.
75 Great Valley Parkway	Malvern, PA		128,206		143,074		—		618,372		143,811		617,635		761,446		441,406	1977	40 yrs.
77-123 Great Valley Parkway	Malvern, PA		—		887,664		—		5,484,101		888,359		5,483,406		6,371,765		3,660,279	1978	40 yrs.
205 Great Valley Parkway	Malvern, PA		—		1,368,259		—		9,533,661		1,369,003		9,532,917		10,901,920		6,153,357	1981	40 yrs.
12,14,16 Great Valley Parkway	Malvern, PA		—		130,689		—		1,298,902		128,767		1,300,824		1,429,591		812,221	1982	40 yrs.
155 Great Valley Parkway	Malvern, PA		—		625,147		—		2,603,724		626,068		2,602,804		3,228,871		1,752,418	1981	40 yrs.
510 Lapp Road	Malvern, PA		—		356,950		—		926,587		357,751		925,786		1,283,537		659,141	1983	40 yrs.
60 Morehall Road	Malvern, PA		—		865,424		9,285,000		5,099,729		884,974		14,365,179		15,250,153		8,205,995	1989	40 yrs.
5 Country View Road	Malvern, PA		—		785,168		4,678,632		859,306		786,235		5,536,870		6,323,106		2,413,402	1985	40 yrs.
7550 Meridian Circle	Maple Grove, MN		—		513,250		2,901,906		851,435		513,250		3,753,340		4,266,590		1,116,812	1989	40 yrs.
701A Route 73 South	Marlton, NJ		—		264,387		3,772,000		3,430,681		271,743		7,195,325		7,467,068		2,991,309	1987	40 yrs.
701C Route 73 South	Marlton, NJ		—		84,949		1,328,000		1,000,645		96,161		2,317,433		2,413,594		913,561	1987	40 yrs.
400 Lippincott Drive	Marlton, NJ		—		69,402				3,665,348		317,799		3,416,951		3,734,750		1,282,570	1999	40 yrs.
406 Lippincott Drive	Marlton, NJ		—		321,455		1,539,871		940,855		327,554		2,474,627		2,802,181		1,068,512	1990	40 yrs.
301 Lippincott Drive	Marlton, NJ		—		1,069,837		4,780,163		2,631,930		1,069,838		7,412,092		8,481,930		2,061,080	1988	40 yrs.
303 Lippincott Drive	Marlton, NJ		—		1,069,837		4,780,163		2,702,827		1,069,838		7,482,990		8,552,827		3,327,490	1988	40 yrs.
75 Brookfield Oaks Drive	Mauldin, SC		—		419,731		—		2,338,692		430,909		2,327,514		2,758,423		335,918	2003	40 yrs.
65 Brookfield Oaks Drive	Mauldin, SC		—		557,174		—		2,890,851		506,318		2,941,708		3,448,026		444,608	2004	40 yrs.
7800 N. 113th Street	Milwaukee, WI		—		1,711,964		6,847,857		328,453		1,711,964		7,176,310		8,888,274		2,177,967	1991	40 yrs.
11950 W. Lake Park Drive	Milwaukee, WI		—		391,813		2,340,118		611,440		394,938		2,948,434		3,343,371		1,136,137	1986	40 yrs.
11400 W. Lake Park Drive	Milwaukee, WI		—		439,595		2,357,904		349,777		443,101		2,704,175		3,147,276		867,142	1986	40 yrs.
11425 W. Lake Park Drive	Milwaukee, WI		—		382,256		2,350,619		475,651		385,305		2,823,221		3,208,526		1,022,821	1987	40 yrs.
11301 W. Lake Park Drive	Milwaukee, WI		—		614,477		2,626,456		134,458		619,465		2,755,926		3,375,391		818,665	1987	40 yrs.
11900 W. Lake Park Drive	Milwaukee, WI		—		347,853		2,396,887		1,121,832		350,628		3,515,945		3,866,572		887,795	1987	40 yrs.
11414 West Park Place	Milwaukee, WI		—		234,443				10,406,336		491,531		10,149,249		10,640,780		3,506,918	2001	40 yrs.
11520 West Calumet Road	Milwaukee, WI		—		341,698		1,527,548		48,494		341,698		1,576,042		1,917,740		429,338	1995	40 yrs.
12100 West Park Place	Milwaukee, WI		—		534,470		3,239,389		655,767		532,370		3,897,257		4,429,627		1,320,028	1984	40 yrs.
11100 West Liberty Drive	Milwaukee, WI		—		1,800,000				7,542,950		1,801,024		7,541,926		9,342,950		1,929,894	2003	40 yrs.
11050 West Liberty Drive	Milwaukee, WI		—		—		—		3,826,790		914,760		2,912,030		3,826,790		333,900	2005	40 yrs.
4700 Nathan Lane North	Minneapolis, MN		—		1,501,308		8,446,083		225,056		1,501,308		8,671,139		10,172,447		2,433,469	1996	40 yrs.
4600 Nathan Lane	Minneapolis, MN		—		1,063,558				7,982,141		1,038,197		8,007,502		9,045,699		2,683,502	2002	40 yrs.
4700 Nathan Lane N — Expansion	Minneapolis, MN		—		—		—		13,170,503		—		13,170,503		13,170,503		453,689	2008	40 yrs.
12501 & 12701 Whitewater Drive	Minnegonka, MN		—		2,175,209		3,948,085		7,814,360		2,177,953		11,759,701		13,937,654		2,599,590	1986	40 yrs.
5600 & 5610 Rowland Road	Minnetonka, MN		—		828,650		7,399,409		1,198,281		829,263		8,597,077		9,426,340		2,804,794	1988	40 yrs.
5400-5500 Feltl Road	Minnetonka, MN		—		883,895		7,983,345		2,010,460		883,895		9,993,805		10,877,700		3,439,643	1985	40 yrs.
3400 Lakeside Drive	Miramar, FL		—		2,022,153		11,345,881		1,500,922		2,022,153		12,846,802		14,868,955		4,233,890	1990	40 yrs.
3450 Lakeside Drive	Miramar, FL		—		2,022,152		11,357,143		2,330,445		2,022,152		13,687,587		15,709,739		4,715,477	1990	40 yrs.
3350 SW 148th Avenue	Miramar, FL		—		2,960,511		—		18,619,103		2,980,689		18,598,924		21,579,613		5,960,178	2000	40 yrs.
3100 SW 145th Avenue	Miramar, FL		—		6,204,407		—		15,562,898		6,265,000		15,502,305		21,767,305		610,702	2007	40 yrs.
324 Park Knoll Drive	Morrisville, NC		*		1,449,092		4,424,932		271,387		1,449,450		4,695,961		6,145,411		471,106	2007	40 yrs.
619 Distribution Drive	Morrisville, NC		*		1,031,430		5,655,167		341,601		1,031,685		5,996,513		7,028,198		583,893	2007	40 yrs.
627 Distribution Drive	Morrisville, NC		*		1,061,370		5,152,110		359,118		1,061,632		5,510,966		6,572,598		498,992	2007	40 yrs.
701 Distribution Drive	Morrisville, NC		*		1,300,889		5,313,226		207,183		1,301,211		5,520,088		6,821,298		558,602	2007	40 yrs.
323 Park Knoll Drive	Morrisville, NC		2,828,450		1,071,600		4,397,807		103,718		1,071,600		4,501,525		5,573,125		—	2010	40 yrs.
330 Fellowship Road	Mount Laurel, NJ		—		3,730,570		—		16,883,907		3,758,270		16,856,207		20,614,477		1,110,722	2006	40 yrs.
300 Fellowship Road	Mt Laurel, NJ		—		—		—		7,350,519		1,098,904		6,251,616		7,350,519		1,257,353	2004	40 yrs.
302 Fellowship Road	Mt Laurel, NJ		—		1,512,120		—		2,881,267		539,060		3,854,327		4,393,387		585,570	2001	40 yrs.
3001 Leadenhall Road	Mt Laurel, NJ		—		1,925,719		191,390		10,965,396		1,936,489		11,146,016		13,082,505		2,583,731	2003	40 yrs.
350 Fellowship Road	Mt Laurel, NJ		—		2,960,159		1,449,611		4,586,987		2,970,687		6,026,071		8,996,757		818,387	2006	40 yrs.
3000 Atrium Way	Mt. Laurel, NJ		—		500,000		4,500,000		3,472,518		512,018		7,960,500		8,472,518		3,156,097	1987	40 yrs.

118

LIBERTY PROPERTY LIMITED PARTNERSHIP
REAL ESTATE AND ACCUMULATED DEPRECIATION
AS OF DECEMBER 31, 2010

								Costs
								Capitalized										Date of
								Subsequent		Gross Amount Carried at End of Period						Accumulated		Construction	Depreciable
				Initial Cost				to		Land and		Building and		Total		Depreciation		or	life
Project	Location	Encumbrances		Land		Building		Acquisition		Improvements		Improvements		12/31/2010		12/31/10		Acquisition	(years)
OPERATING PROPERTIES
11000, 15000 Commerce Parkway	Mt. Laurel, NJ		—		310,585		4,394,900		229,583		311,950		4,623,118		4,935,068		1,835,463	1985	40 yrs.
12000, 14000 Commerce Parkway	Mt. Laurel, NJ		—		361,800		3,285,817		775,089		362,855		4,059,850		4,422,706		1,758,052	1985	40 yrs.
16000, 18000 Commerce Parkway	Mt. Laurel, NJ		—		289,700		2,512,683		1,084,817		290,545		3,596,655		3,887,200		1,445,408	1985	40 yrs.
1300 Route 73 North	Mt. Laurel, NJ		—		449,400		3,074,850		1,932,794		450,558		5,006,486		5,457,044		1,718,328	1988	40 yrs.
6000 Commerce Parkway	Mt. Laurel, NJ		—		234,151		2,022,683		318,526		234,151		2,341,209		2,575,360		776,000	1985	40 yrs.
8000 Commerce Parkway	Mt. Laurel, NJ		—		234,814		1,995,098		539,621		234,814		2,534,719		2,769,533		872,377	1983	40 yrs.
9000 Commerce Parkway	Mt. Laurel, NJ		—		286,587		2,474,820		1,340,796		286,587		3,815,616		4,102,203		1,153,126	1983	40 yrs.
1000 Briggs Road	Mt. Laurel, NJ		—		288,577		2,546,537		564,777		288,577		3,111,314		3,399,891		1,091,545	1986	40 yrs.
1025 Briggs Road	Mt. Laurel, NJ		—		430,990		3,714,828		1,238,899		430,990		4,953,727		5,384,717		1,840,336	1987	40 yrs.
1020 Briggs Road	Mt. Laurel, NJ		—		494,334		—		3,137,988		569,184		3,063,139		3,632,322		1,190,427	1999	40 yrs.
2000 Crawford Place	Mt. Laurel, NJ		—		310,831		2,797,744		2,050,418		310,831		4,848,162		5,158,993		1,934,061	1986	40 yrs.
5000 Dearborn Court	Mt. Laurel, NJ		—		1,057,763		4,191,827		1,478,335		1,057,763		5,670,162		6,727,925		1,926,168	1988	40 yrs.
1001 Briggs Road	Mt. Laurel, NJ		—		701,705		3,505,652		1,961,528		701,705		5,467,180		6,168,886		2,265,945	1986	40 yrs.
1015 Briggs Road	Mt. Laurel, NJ		—		356,987		—		3,705,164		470,659		3,591,492		4,062,151		1,295,054	2000	40 yrs.
17000 Commerce Parkway	Mt. Laurel, NJ		—		144,515				3,428,278		144,515		3,428,278		3,572,793		1,076,681	2001	40 yrs.
27th Street	Oak Creek, WI		—		348,280		—		4,295,405		696,690		3,946,995		4,643,685		165,695	2007	40 yrs.
Corporate Preserve Drive	Oak Creek, WI		—		516,016		—		3,933,839		654,271		3,795,584		4,449,855		146,271	2007	40 yrs.
550-590 Hale Avenue	Oakdale, MN		—		765,535		3,488,754		303,570		766,390		3,791,469		4,557,859		1,070,168	1996	40 yrs.
1879 Lamont Avenue	Odenton, MD		—		1,976,000		8,099,579		2,469,160		2,011,030		10,533,709		12,544,739		1,834,637	2004	40 yrs.
350 Winmeyer Avenue	Odenton, MD		—		1,778,400		7,289,165		1,867,935		1,809,927		9,125,573		10,935,500		1,461,921	2004	40 yrs.
9600 Satellite Boulevard	Orlando, FL		*		252,850		1,297,923		62,116		252,850		1,360,039		1,612,889		476,769	1989	40 yrs.
9700 Satellite Boulevard	Orlando, FL		*		405,362		1,146,546		314,760		405,362		1,461,306		1,866,668		521,435	1989	40 yrs.
1902 Cypress Lake Drive	Orlando, FL		*		523,512		3,191,790		914,639		538,512		4,091,429		4,629,941		1,454,355	1989	40 yrs.
9550 Satellite Boulevard	Orlando, FL		—		574,831		—		2,349,259		587,319		2,336,771		2,924,090		766,292	1999	40 yrs.
10511 & 10611 Satellite Boulevard	Orlando, FL		—		517,554		2,568,186		398,922		522,991		2,961,671		3,484,662		1,021,663	1985	40 yrs.
1400-1440 Central Florida Parkway	Orlando, FL		*		518,043		2,561,938		764,155		518,043		3,326,093		3,844,136		1,052,279	1962	40 yrs.
2216 Directors Row	Orlando, FL		—		453,918		2,572,202		349,256		453,918		2,921,458		3,375,376		822,168	1998	40 yrs.
2400 South Lake Orange Drive	Orlando, FL		—		385,964		—		2,419,706		642,427		2,163,243		2,805,669		612,812	2001	40 yrs.
6923 Lee Vista Boulevard	Orlando, FL		—		903,701		—		3,791,927		830,953		3,864,675		4,695,628		479,492	2006	40 yrs.
6501 Lee Vista Boulevard	Orlando, FL		—		903,701				5,660,761		925,671		5,638,790		6,564,462		1,308,507	2001	40 yrs.
2416 Lake Orange Drive	Orlando, FL		—		535,964				2,867,281		704,800		2,698,444		3,403,244		786,401	2002	40 yrs.
10771 Palm Bay Drive	Orlando, FL		*		664,605				2,362,814		685,383		2,342,035		3,027,419		533,740	2001	40 yrs.
10003 Satellite Boulevard	Orlando, FL		—		680,312		2,120,754		1,219,087		680,312		3,339,841		4,020,152		750,364	2003	40 yrs.
1090 Gills Drive	Orlando, FL		*		878,320		2,558,833		1,400,491		878,320		3,959,324		4,837,644		732,654	2003	40 yrs.
2202 Taft-Vineland Road	Orlando, FL		—		—		—		6,631,110		1,283,713		5,347,397		6,631,110		1,579,677	2004	40 yrs.
South Center Land-Phase II	Orlando, FL		—		838,853		—		4,084,539		767,953		4,155,440		4,923,392		560,662	2006	40 yrs.
7315 Kingspointe Parkway	Orlando, FL		*		1,931,697		6,388,203		2,135,046		1,932,004		8,522,943		10,454,946		1,940,443	2004	40 yrs.
2351 Investors Row	Orlando, FL		*		2,261,924		7,496,249		411,516		2,263,211		7,906,478		10,169,689		1,211,038	2004	40 yrs.
2256 Taft-Vineland Road	Orlando, FL		—		467,296		—		2,494,666		825,673		2,136,290		2,961,963		373,172	2005	40 yrs.
1950 Summit Park Drive	Orlando, FL		—		2,573,700		17,478,646		2,068,083		2,583,667		19,536,762		22,120,429		2,931,860	2005	40 yrs.
1958 Summit Park Drive	Orlando, FL		—		2,573,961		11,206,937		9,676,795		2,583,216		20,874,477		23,457,693		2,841,547	2005	40 yrs.
6200 Lee Vista Boulevard	Orlando, FL		—		1,435,301		6,174,642		200,240		1,435,301		6,374,882		7,810,183		690,586	2006	40 yrs.
7022 TPC Drive	Orlando, FL		—		1,443,510		6,775,194		570,566		1,457,286		7,331,985		8,789,270		972,281	2006	40 yrs.
7100 TPC Drive	Orlando, FL		—		1,431,489		8,002,539		628,392		1,445,807		8,616,613		10,062,420		1,124,653	2006	40 yrs.
7101 TPC Drive	Orlando, FL		—		1,553,537		5,702,243		307,605		1,570,863		5,992,522		7,563,385		672,126	2006	40 yrs.
851 Gills Drive	Orlando, FL		—		332,992		—		2,644,112		373,500		2,603,604		2,977,104		173,781	2006	40 yrs.
950 Gills Drive	Orlando, FL		—		443,989		—		2,698,675		464,800		2,677,864		3,142,664		158,297	2006	40 yrs.
1000 Gills Drive	Orlando, FL		—		415,906		—		2,712,378		435,400		2,692,883		3,128,283		188,966	2006	40 yrs.
201 Summit Park Drive	Orlando, FL		—		4,435,921		—		38,355,529		4,510,990		38,280,461		42,791,450		664,651	2008	40 yrs.
8201 Chancellor Drive	Orlando, FL		—		4,295,972		15,564,905		2,966,361		4,295,972		18,531,266		22,827,239		287,908	2010	40 yrs.
8801 Tinicum Boulevard	Philadelphia, PA		—		2,474,031		—		43,774,779		125,087		46,123,723		46,248,810		18,205,132	1997	40 yrs.
3 Franklin Plaza	Philadelphia, PA		—		2,483,144		—		32,150,134		2,514,519		32,118,759		34,633,278		9,484,817	1999	40 yrs.
4751 League Island Boulevard	Philadelphia, PA		—		992,965		331,924		6,791,359		1,022,081		7,094,168		8,116,249		1,406,432	2003	40 yrs.
1 Crescent Drive	Philadelphia, PA		—		567,280		—		12,028,316		347,892		12,247,704		12,595,596		1,910,404	2004	40 yrs.
4775 League Island Boulevard	Philadelphia, PA		—		891,892		—		5,757,514		366,982		6,282,425		6,649,406		510,831	2006	40 yrs.
4300 South 26th Street	Philadelphia, PA		—		402,673		—		36,561,192		417,353		36,546,513		36,963,865		1,236,362	2008	40 yrs.
3 Crescent Drive	Philadelphia, PA		—		214,726		—		23,728,765		417,485		23,526,006		23,943,491		347,394	2008	40 yrs.
4410 E. Cotton Center Boulevard	Phoenix, AZ		—		4,758,484		10,559,563		5,587,577		4,765,172		16,140,451		20,905,624		1,419,862	2007	40 yrs.
4750 S. 44th Place	Phoenix, AZ		—		3,756,307		8,336,400		4,122,476		3,761,587		12,453,596		16,215,183		939,944	2007	40 yrs.
4435 E. Cotton Center Boulevard	Phoenix, AZ		—		1,910,584		1,954,020		2,166,648		1,911,045		4,120,208		6,031,253		492,458	2007	40 yrs.
4207 E. Cotton Center Boulevard	Phoenix, AZ		—		1,409,908		4,680,808		1,100,202		1,410,248		5,780,670		7,190,918		842,005	2007	40 yrs.
4217 E. Cotton Center Boulevard	Phoenix, AZ		—		7,922,480		10,045,599		2,755,567		6,690,321		14,033,325		20,723,646		1,520,748	2007	40 yrs.
4425 E. Cotton Center Boulvard	Phoenix, AZ		*		7,318,457		24,549,401		28,556		7,318,457		24,577,957		31,896,413		2,854,518	2007	40 yrs.
4415 E. Cotton Center Boulevard	Phoenix, AZ		*		1,749,957		3,667,748		7,388		1,749,957		3,675,136		5,425,093		459,476	2007	40 yrs.
4405 E. Cotton Center Boulevard	Phoenix, AZ		*		2,646,318		9,697,439		263,756		2,646,318		9,961,195		12,607,513		1,068,755	2007	40 yrs.
4313 E. Cotton Center Boulevard	Phoenix, AZ		*		3,895,539		16,724,283		1,401,488		3,895,539		18,125,772		22,021,311		2,163,300	2007	40 yrs.
4303 E. Cotton Center Boulvard	Phoenix, AZ		*		2,619,964		9,675,711		52,718		2,619,964		9,728,428		12,348,392		1,130,199	2007	40 yrs.
4610 South 44th Street	Phoenix, AZ		—		6,539,310		—		10,331,534		6,827,288		10,043,555		16,870,843		421,457	2007	40 yrs.
4550 South 44th Street	Phoenix, AZ		—		5,380,972		—		4,381,333		5,617,939		4,144,367		9,762,306		146,427	2007	40 yrs.
9801 80th Avenue	Pleasant Prairie, WI		—		1,692,077		7,934,794		250,974		1,689,726		8,188,119		9,877,845		2,478,190	1994	40 yrs.
2250 Hickory Road	Plymouth Meeting, PA		—		1,015,851		9,175,555		2,821,413		1,024,040		11,988,779		13,012,819		4,174,450	1985	40 yrs.
2905 Northwest Boulevard	Plymouth, MN		—		516,920		4,646,342		2,426,568		516,920		7,072,910		7,589,830		2,087,144	1983	40 yrs.
2800 Campus Drive	Plymouth, MN		—		395,366		3,554,512		918,212		395,366		4,472,724		4,868,090		1,692,190	1985	40 yrs.

119

LIBERTY PROPERTY LIMITED PARTNERSHIP
REAL ESTATE AND ACCUMULATED DEPRECIATION
AS OF DECEMBER 31, 2010

								Costs
								Capitalized										Date of
								Subsequent		Gross Amount Carried at End of Period						Accumulated		Construction	Depreciable
				Initial Cost				to		Land and		Building and		Total		Depreciation		or	life
Project	Location	Encumbrances		Land		Building		Acquisition		Improvements		Improvements		12/31/2010		12/31/10		Acquisition	(years)
OPERATING PROPERTIES
2955 Xenium Lane	Plymouth, MN		—		151,238		1,370,140		393,089		151,238		1,763,230		1,914,468		668,422	1985	40 yrs.
2920 Northwest Boulevard	Plymouth, MN		—		392,026		3,433,678		456,993		384,235		3,898,462		4,282,697		1,277,979	1997	40 yrs.
14630-14650 28th Avenue North	Plymouth, MN		—		198,205		1,793,422		615,305		198,205		2,408,726		2,606,931		918,230	1978	40 yrs.
9600 54th Avenue	Plymouth, MN		—		332,317		3,077,820		910,372		332,317		3,988,192		4,320,509		1,079,239	1998	40 yrs.
1500 SW 5th Court	Pompano Beach, FL		—		972,232		3,892,085		392,196		972,232		4,284,282		5,256,513		1,413,897	1957	40 yrs.
1651 SW 5th Court	Pompano Beach, FL		—		203,247		811,093		11,783		203,247		822,876		1,026,124		264,713	1990	40 yrs.
1601 SW 5th Court	Pompano Beach, FL		—		203,247		811,093		224,133		203,247		1,035,226		1,238,473		421,093	1990	40 yrs.
1501 SW 5th Court	Pompano Beach, FL		—		203,247		811,093		200,027		203,247		1,011,120		1,214,367		286,311	1990	40 yrs.
1400 SW 6th Court	Pompano Beach, FL		—		1,157,049		4,620,956		355,505		1,157,049		4,976,461		6,133,511		1,604,895	1986	40 yrs.
1405 SW 6th Court	Pompano Beach, FL		—		392,138		1,565,787		256,028		392,138		1,821,816		2,213,954		634,567	1985	40 yrs.
595 SW 13th Terrace	Pompano Beach, FL		—		359,933		1,437,116		621,873		359,933		2,058,989		2,418,922		580,887	1984	40 yrs.
601 SW 13th Terrace	Pompano Beach, FL		—		164,413		655,933		281,345		164,413		937,278		1,101,691		337,880	1984	40 yrs.
605 SW 16th Terrace	Pompano Beach, FL		—		310,778		1,238,324		239,517		310,178		1,478,441		1,788,619		551,735	1965	40 yrs.
301 Hill Carter Parkway	Richmond, VA		—		659,456		4,836,010		159,898		659,456		4,995,908		5,655,364		1,946,188	1989	40 yrs.
5600-5626 Eastport Boulevard	Richmond, VA		—		489,941		3,592,900		254,734		489,941		3,847,634		4,337,575		1,538,356	1989	40 yrs.
5650-5674 Eastport Boulevard	Richmond, VA		—		644,384		4,025,480		87,419		644,384		4,112,899		4,757,283		1,671,965	1990	40 yrs.
5700 Eastport Boulevard	Richmond, VA		—		408,729		2,697,348		676,233		408,729		3,373,581		3,782,310		1,404,256	1990	40 yrs.
4101-4127 Carolina Avenue	Richmond, VA		—		310,854		2,279,597		1,080,673		310,854		3,360,270		3,671,124		1,150,876	1973	40 yrs.
4201-4261 Carolina Avenue	Richmond, VA		—		693,203		5,083,493		1,642,146		693,203		6,725,639		7,418,842		2,598,221	1975	40 yrs.
4263-4299 Carolina Avenue	Richmond, VA		—		256,203		2,549,649		1,962,691		256,203		4,512,340		4,768,543		1,592,937	1976	40 yrs.
4301-4335 Carolina Avenue	Richmond, VA		—		223,696		1,640,435		2,756,533		223,696		4,396,968		4,620,664		1,431,051	1978	40 yrs.
4337-4379 Carolina Avenue	Richmond, VA		—		325,303		2,385,557		1,163,576		325,303		3,549,133		3,874,436		1,324,818	1979	40 yrs.
4501-4549 Carolina Avenue	Richmond, VA		—		486,166		3,565,211		427,390		486,166		3,992,601		4,478,767		1,532,683	1981	40 yrs.
4551-4593 Carolina Avenue	Richmond, VA		—		474,360		3,478,646		759,404		474,360		4,238,050		4,712,410		1,573,436	1982	40 yrs.
4601-4643 Carolina Avenue	Richmond, VA		—		652,455		4,784,675		555,531		652,455		5,340,206		5,992,661		2,228,217	1985	40 yrs.
4645-4683 Carolina Avenue	Richmond, VA		—		404,616		2,967,187		470,017		404,616		3,437,204		3,841,820		1,304,181	1985	40 yrs.
4447-4491 Carolina Avenue	Richmond, VA		—		454,056		2,729,742		362,531		454,056		3,092,273		3,546,329		1,233,787	1987	40 yrs.
4401-4445 Carolina Avenue	Richmond, VA		—		615,038		4,510,272		371,019		615,038		4,881,291		5,496,329		1,886,600	1988	40 yrs.
2300 East Parham Road	Richmond, VA		—		221,947		1,011,088		2,443		221,947		1,013,531		1,235,478		461,965	1988	40 yrs.
5601-5659 Eastport Boulevard	Richmond, VA		—		705,660		—		4,557,438		720,100		4,542,998		5,263,098		1,633,594	1996	40 yrs.
5900 Eastport Boulevard	Richmond, VA		—		676,661		—		4,822,774		687,898		4,811,537		5,499,435		1,771,709	1997	40 yrs.
4717-4729 Eubank Road	Richmond, VA		—		449,447		3,294,697		544,248		452,263		3,836,128		4,288,391		1,666,553	1978	40 yrs.
4263F-N. Carolina Avenue	Richmond, VA		—		91,476		—		1,653,510		91,599		1,653,387		1,744,986		599,151	1975	40 yrs.
510 Eastpark Court	Richmond, VA		—		261,961		2,110,874		427,164		262,210		2,537,789		2,799,999		938,249	1989	40 yrs.
520 Eastpark Court	Richmond, VA		—		486,118		4,083,582		263,481		486,598		4,346,583		4,833,181		1,582,609	1989	40 yrs.
5701-5799 Eastport Boulevard	Richmond, VA		—		694,644		—		5,394,868		700,503		5,389,009		6,089,512		1,814,497	1998	40 yrs.
530 Eastpark Court	Richmond, VA		—		266,883		—		2,527,958		334,772		2,460,069		2,794,841		862,072	1999	40 yrs.
6000 Eastport Blvd	Richmond, VA		—		872,901		—		7,486,258		901,666		7,457,493		8,359,159		512,626	1997	40 yrs.
3829-3855 Gaskins Road	Richmond, VA		—		364,165		3,264,114		44,174		364,165		3,308,289		3,672,454		1,064,042	1988	40 yrs.
10800 Nuckols Boulevard	Richmond, VA		—		1,432,462		—		14,420,839		1,794,162		14,059,139		15,853,301		3,834,586	2000	40 yrs.
100 Westgate Parkway	Richmond, VA		—		1,140,648		101,824		9,955,442		1,456,084		9,741,829		11,197,913		2,229,493	2001	40 yrs.
200 Westgate Parkway	Richmond, VA		—		1,623,612				6,355,516		1,072,797		6,906,331		7,979,128		1,750,023	2002	40 yrs.
3901 Westerre Parkway	Richmond, VA		—		634,231		—		12,273,725		1,492,295		11,415,662		12,907,956		495,001	2003	40 yrs.
3900 Westerre Parkway	Richmond, VA		—		392,184		—		11,655,841		1,083,836		10,964,189		12,048,025		1,575,800	2005	40 yrs.
1001 Boulders Parkway	Richmond, VA		—		2,073,739		5,634,796		1,601,236		2,079,643		7,230,128		9,309,770		1,290,955	2005	40 yrs.
7400 Beaufont Springs Drive	Richmond, VA		—		808,581		7,273,850		1,236,204		810,743		8,507,891		9,318,634		1,346,294	2005	40 yrs.
1100 Boulders Parkway	Richmond, VA		—		1,276,936		12,052,192		1,796,796		1,280,662		13,845,263		15,125,925		1,986,745	2005	40 yrs.
540 Eastpark Court	Richmond, VA		—		742,300		—		5,415,233		1,066,839		5,090,694		6,157,533		241,330	2007	40 yrs.
2020 US Highway 301 South	Riverview, FL		—		1,233,639		13,608,485		109,898		1,233,800		13,718,223		14,952,022		1,703,139	2006	40 yrs.
6532 Judge Adams Road	Rock Creek, NC		—		354,903		—		3,981,740		399,988		3,936,655		4,336,643		1,252,881	1997	40 yrs.
6530 Judge Adams Road	Rock Creek, NC		—		305,821		—		4,782,967		335,061		4,753,727		5,088,788		1,366,230	1999	40 yrs.
8501 East Raintree Drive	Scottsdale, AZ		—		4,076,412		—		27,621,159		4,115,137		27,582,434		31,697,571		4,218,935	2005	40 yrs.
Renaissance Blvd & Hwy 20	Sturtevant, WI		—		2,484,450		—		22,431,424		2,487,293		22,428,580		24,915,873		3,394,514	2006	40 yrs.
6950 Harbor View Blvd	Suffolk, VA		—		929,844		—		6,214,521		794,848		6,349,518		7,144,365		941,491	2004	40 yrs.
6900 Harbor View Boulevard	Suffolk, VA		—		904,052		—		8,570,545		807,006		8,667,592		9,474,597		826,201	2006	40 yrs.
13650 NW 8th Street	Sunrise, FL		—		558,223		2,171,930		1,134		558,251		2,173,036		2,731,287		726,873	1991	40 yrs.
13630 NW 8th Street	Sunrise, FL		—		659,797		2,596,275		128,733		659,825		2,724,979		3,384,804		860,712	1991	40 yrs.
1301 International Parkway	Sunrise, FL		—		5,100,162		24,219,956		8,030,931		5,100,791		32,250,258		37,351,049		3,459,852	2006	40 yrs.
13621 NW 12th Street	Sunrise, FL		—		5,570,820		9,454,900		2,334,581		5,570,821		11,789,479		17,360,300		1,739,700	2008	40 yrs.
5501-5519 Pioneer Park Boulevard	Tampa, FL		—		162,000		1,613,000		967,811		262,416		2,480,396		2,742,811		885,338	1981	40 yrs.
5690-5694 Crenshaw Street	Tampa, FL		—		181,923		1,812,496		223,143		181,923		2,035,639		2,217,562		775,833	1979	40 yrs.
3102,3104,3110 Cherry Palm Drive	Tampa, FL		—		503,767		2,787,585		1,201,051		503,767		3,988,636		4,492,403		1,693,949	1986	40 yrs.
8401-8408 Benjamin Road	Tampa, FL		—		789,651		4,454,648		1,794,502		769,789		6,269,011		7,038,801		2,571,492	1986	40 yrs.
111 Kelsey Lane	Tampa, FL		—		359,540		1,461,850		558,088		359,540		2,019,938		2,379,478		800,653	1990	40 yrs.
7930, 8010-20 Woodland Center Boulevard	Tampa, FL		*		1,408,478		5,247,246		1,164,667		1,408,478		6,411,914		7,820,391		2,417,151	1990	40 yrs.
7920 Woodland Center Boulevard	Tampa, FL		*		1,082,648		2,445,444		23,564		1,082,648		2,469,008		3,551,656		844,855	1997	40 yrs.
8154-8198 Woodland Center Boulevard	Tampa, FL		—		399,088		2,868,834		503,628		399,088		3,372,462		3,771,550		1,142,438	1988	40 yrs.
8112-42 Woodland Center Boulevard	Tampa, FL		—		513,263		3,230,239		649,273		513,263		3,879,513		4,392,775		1,395,842	1995	40 yrs.
8212 Woodland Center Boulevard	Tampa, FL		—		820,882		2,322,720		14,210		820,882		2,336,931		3,157,813		797,430	1996	40 yrs.
131 Kelsey Lane	Tampa, FL		—		511,463		—		4,437,886		559,527		4,389,822		4,949,349		2,237,137	1985	40 yrs.
7724 Woodland Center Boulevard	Tampa, FL		—		235,893		—		2,127,887		235,894		2,127,886		2,363,780		733,090	1998	40 yrs.
7802-50 Woodland Center Boulevard	Tampa, FL		—		357,364		—		2,625,403		506,949		2,475,818		2,982,767		775,850	1999	40 yrs.
7852-98 Woodland Center Boulevard	Tampa, FL		—		357,364		—		2,299,349		506,949		2,149,764		2,656,713		766,317	1999	40 yrs.

120

LIBERTY PROPERTY LIMITED PARTNERSHIP
REAL ESTATE AND ACCUMULATED DEPRECIATION
AS OF DECEMBER 31, 2010

								Costs
								Capitalized												Date of
								Subsequent		Gross Amount Carried at End of Period							Accumulated			Construction	Depreciable
				Initial Cost				to		Land and			Building and		Total		Depreciation			or	life
Project	Location	Encumbrances		Land		Building		Acquisition		Improvements			Improvements		12/31/2010		12/31/10			Acquisition	(years)
OPERATING PROPERTIES
8921 Brittany Way	Tampa, FL		—		224,369		1,063,882		987,258		254,493			2,021,015		2,275,509		683,092		1998	40 yrs.
5250 Eagle Trail Drive	Tampa, FL		—		952,860		—		3,457,917		952,860			3,457,917		4,410,776		1,059,272		1998	40 yrs.
7725 Woodland Center Boulevard	Tampa, FL		—		553,335		—		3,355,037		771,501			3,136,870		3,908,372		904,524		1999	40 yrs.
8001 Woodland Center Boulevard	Tampa, FL		—		350,406		—		2,365,836		438,061			2,278,182		2,716,243		649,571		1999	40 yrs.
4630 Woodland Corporate Boulevard	Tampa, FL		—		943,169		—		13,135,586		1,560,099			12,518,656		14,078,756		3,462,107		2000	40 yrs.
701-725 South US Hwy 301	Tampa, FL		—		419,683		—		3,284,227		661,680			3,042,230		3,703,910		1,020,300		2000	40 yrs.
4502 Woodland Corporate Boulevard	Tampa, FL		—		—		—		4,875,253		1,071,535			3,803,718		4,875,253		971,879		1999	40 yrs.
9001-9015 Brittany Way	Tampa, FL		—		209,841		—		1,795,733		364,514			1,641,060		2,005,574		449,464		2000	40 yrs.
4508 Woodland Corporate Boulevard	Tampa, FL		—		498,598		—		3,057,752		556,887			2,999,463		3,556,350		900,759		2000	40 yrs.
7622 Bald Cypress Place	Tampa, FL		—		—		—		1,305,584		300,000			1,005,584		1,305,584		278,758		2000	40 yrs.
901-933 US Highway 301 South	Tampa, FL		—		500,391				3,829,240		840,314			3,489,318		4,329,631		1,179,321		2001	40 yrs.
4503 Woodland Corporate Boulevard	Tampa, FL		—		—				3,496,413		619,913			2,876,500		3,496,413		728,005		2002	40 yrs.
4505 Woodland Corporate Boulevard	Tampa, FL		—		—				3,168,713		716,594			2,452,119		3,168,713		849,691		2002	40 yrs.
4511 Woodland Corporate Boulevard	Tampa, FL		—		—				2,740,686		686,594			2,054,092		2,740,686		538,101		2002	40 yrs.
7621 Bald Cypress Place (Bldg N)	Tampa, FL		—		—		—		1,482,613		447,498			1,035,115		1,482,613		246,794		2001	40 yrs.
4520 Seedling Circle	Tampa, FL		—		854,797		42,131		2,721,233		854,797			2,763,364		3,618,161		462,218		2003	40 yrs.
501 US Highway 301 South	Tampa, FL		—		898,884		—		3,498,107		900,508			3,496,483		4,396,991		933,216		2004	40 yrs.
9002-9036 Brittany Way	Tampa, FL		—		492,320		—		3,853,643		899,284			3,446,679		4,345,963		822,559		2004	40 yrs.
8900-34 Brittany Was	Tampa, FL		—		537,194		—		4,128,520		978,019			3,687,696		4,665,714		1,016,073		2005	40 yrs.
200-34 Kelsey Lane	Tampa, FL		—		330,097		—		3,321,485		933,362			2,718,220		3,651,582		344,220		2005	40 yrs.
910-926 Chad Lane	Tampa, FL		—		201,771		—		3,214,583		628,237			2,788,117		3,416,354		551,044		2006	40 yrs.
150-182 Kelsey Lane	Tampa, FL		—		403,541		—		5,545,710		1,181,609			4,767,643		5,949,251		1,261,054		2006	40 yrs.
8725 Henderson Road	Tampa, FL		—		3,167,787		19,126,318		314,323		3,167,958			19,440,471		22,608,428		3,265,960		2006	40 yrs.
8735 Henderson Road	Tampa, FL		—		3,166,130		18,735,573		1,163,921		3,166,300			19,899,324		23,065,624		3,350,709		2006	40 yrs.
8705 Henderson Road	Tampa, FL		—		4,303,870		23,688,409		259,947		4,304,102			23,948,125		28,252,227		4,280,801		2006	40 yrs.
8715 Henderson Road	Tampa, FL		—		3,343,910		18,325,599		290,389		3,344,090			18,615,808		21,959,898		2,777,918		2006	40 yrs.
8745 Henderson Road	Tampa, FL		—		2,050,439		11,173,008		472,341		2,050,548			11,645,240		13,695,788		1,876,288		2006	40 yrs.
4631 Woodland Corporate Blvd	Tampa, FL		—		1,453,367		—		13,350,228		1,908,792			12,894,803		14,803,595		646,405		2006	40 yrs.
7851-7861 Woodland Center Blvd	Tampa, FL		—		548,905		2,241,627		204,883		548,905			2,446,510		2,995,415		296,781		2006	40 yrs.
9306-24 East Broadway Avenue	Tampa, FL		—		450,440		—		3,303,369		486,004			3,267,805		3,753,809		221,846		2007	40 yrs.
8313 West Pierce Street	Tolleson, AZ		—		2,295,090		9,079,811		3,143,989		2,295,090			12,223,799		14,518,890		1,250,935		2007	40 yrs.
3701 Corporate Parkway	Upper Saucon, PA		—		1,078,674		—		10,817,575		901,968			10,994,281		11,896,250		1,567,502		2005	40 yrs.
2809 South Lynnhaven Road	Virginia Beach, VA		—		953,590		6,142,742		1,752,750		953,590			7,895,492		8,849,082		2,538,253		1987	40 yrs.
200 Golden Oak Court	Virginia Beach, VA		—		1,116,693		6,770,480		1,381,663		1,116,693			8,152,143		9,268,836		2,748,724		1988	40 yrs.
208 Golden Oak Court	Virginia Beach, VA		—		965,177		6,728,717		1,320,782		965,177			8,049,499		9,014,676		2,763,652		1989	40 yrs.
484 Viking Drive	Virginia Beach, VA		—		891,753		3,607,890		625,117		891,753			4,233,006		5,124,759		1,456,757		1987	40 yrs.
629 Phoenix Drive	Virginia Beach, VA		—		371,694		2,108,097		288,669		371,694			2,396,766		2,768,460		860,414		1996	40 yrs.
5700 Cleveland Street	Virginia Beach, VA		—		700,112		9,592,721		1,799,638		700,564			11,391,906		12,092,471		4,090,519		1989	40 yrs.
1457 Miller Store Road	Virginia Beach, VA		—		473,689		2,663,045		812,854		474,746			3,474,843		3,949,589		938,194		2003	40 yrs.
11020 West Plank Court	Wauwatosa, WI		—		464,246		2,681,255		16,000		464,246			2,697,254		3,161,501		732,324		1985	40 yrs.
825 Duportail Road	Wayne, PA		—		5,536,619		16,179,213		4,488,519		5,539,281			20,665,071		26,204,352		5,313,436		1979	40 yrs.
1500 Liberty Ridge	Wayne, PA		—		8,287,555				31,020,857		11,636,499			27,671,913		39,308,412		7,670,102		2002	40 yrs.
1200 Liberty Ridge Drive	Wayne, PA		—		6,215,667				8,301,339		5,223,660			9,293,346		14,517,006		2,887,330		2001	40 yrs.
11300-90 West Theodore Trecker Way	West Allis, WI		—		500,565		1,591,678		676,697		505,972			2,262,968		2,768,940		480,184		2005	40 yrs.
11548 West Theodore Trecker Way	West Allis, WI		—		660,068		4,640,578		87,815		663,766			4,724,696		5,388,462		657,868		2005	40 yrs.
11420 West Theodore Trecker Way	West Allis, WI		—		348,146		2,057,483		104,569		350,008			2,160,190		2,510,198		301,730		2005	40 yrs.
400-500 Brandywine Parkway	West Chester, PA		—		845,846		6,809,025		501,861		845,846			7,310,886		8,156,732		2,387,865		1988	40 yrs.
600 Brandywine Parkway	West Chester, PA		—		664,899		5,352,410		687,777		664,899			6,040,187		6,705,086		2,074,776		1988	40 yrs.
42 Kings Hill Avenue	West Malling, UK		—		—		—		17,836,902		4,237,510			13,599,392		17,836,902		1,278,079		2005	40 yrs.
Liberty Square Retail Blocks	West Malling, UK		—		559,590		5,113,902		3,448,222		1,122,488			7,999,225		9,121,714		1,135,075		2006	40 yrs.
1 Kings Hill Aveune	West Malling, UK		—		—		—		14,011,674		3,903,279			10,108,395		14,011,674		1,072,508		2006	40 yrs.
Liberty Square	West Malling, UK		—		—		—		—		—			—		—		(170	)	2006	40 yrs.
Liberty Property Trust UK	West Malling, UK		—		—		—		48,601		(39	)		48,640		48,601		—		2006	40 yrs.
3612 La Grange Parkway	Williamsburg, VA		—		—		—		5,722,994		887,234			4,835,761		5,722,994		778,225		2003	40 yrs.
7805 Hudson Road	Woodbury, MN		—		1,279,834				10,291,220		1,385,739			10,185,316		11,571,054		3,648,273		2002	40 yrs.
Subtotal Operating Real Estate		$	55,765,632	$	780,218,676	$	1,798,426,710	$	2,706,813,044	$	864,796,710		$	4,420,661,719	$	5,285,458,429	$	1,090,685,108

121

LIBERTY PROPERTY LIMITED PARTNERSHIP
REAL ESTATE AND ACCUMULATED DEPRECIATION
AS OF DECEMBER 31, 2010

								Costs
								Capitalized
								Subsequent			Gross Amount Carried at End of Period						Accumulated		Construction	Depreciable
				Initial Cost				to			Land and		Building and		Total		Depreciation		or	life
Project	Location	Encumbrances		Land		Building		Acquisition			Improvements		Improvements		12/31/2010		12/31/10		Acquisition	(years)
LAND HELD FOR DEVELOPMENT
Perryman Road Land	Aberdeen, MD	$	—	$	12,052,635	$	—	$	278,080		$	12,330,715	$	—	$	12,330,715	$	—	2005	N/A
2 Womack Drive Land	Annapolis, MD		—		5,796,667		—		13,676			5,810,344		—		5,810,344		—	2007	N/A
Boca Colannade Yamato Road	Boca Raton, FL		—		2,039,735		—		566,124			2,605,859		—		2,605,859		—	1998	N/A
12912 Virkler Drive Land	Charlotte, NC		—		208,646		—		—			208,647		—		208,647		—	2010	N/A
Flying Cloud Drive Land	Eden Pairie, MN		—		2,051,631		—		23,215			2,074,846		—		2,074,846		—	2007	N/A
Camelback 303 Business Center Land	Goodyear, AZ		—		16,857,556		—		3,165,230			20,022,786		—		20,022,786		—	2007	N/A
Pleasant Ridge Road Land	Greensboro, NC		—		564,535		—		2,896,157			3,460,692		—		3,460,692		—	2006	N/A
Southchase Business Park Land	Greenville, SC		—		1,308,325		—		713,086			2,021,411		—		2,021,411		—	1998	N/A
Caliber Ridge Ind. Park Land	Greer, SC		—		2,297,492		—		3,566,222			5,863,714		—		5,863,714		—	2007	N/A
Hunters Green Land	Hagerstown, MD		—		5,489,586		—		8,352,688			13,842,274		—		13,842,274		—	2006	N/A
Lakefront Plaza II Land	Hampton, VA		229,953		138,101		—		101,157			239,258		—		239,258		—	2001	N/A
Ridge Road Land	Hanover, MD		—		3,371,183		—		452,208			3,823,391		—		3,823,391		—	2008	N/A
Mendenhall Land	High Point, NC		—		1,756,230		—		836,909			2,593,140		—		2,593,140		—	1995	N/A
Piedmond Centre Land	High Point, NC		—		913,276		—		912,540			1,825,816		—		1,825,816		—	2006	N/A
Commonwealth Corporate Center Land	Horsham, PA		—		3,043,938		—		25,160			3,069,098		—		3,069,098		—	2005	N/A
Beltway 8 @Bammel Bus Park Land	Houston, TX		—		1,072,634		—		14,445			1,087,079		—		1,087,079		—	2007	N/A
Central Green Land — Tract 5	Houston, TX		—		3,492,547		—		570,173			4,062,720		—		4,062,720		—	2007	N/A
Greens Crossing Land	Houston, TX		—		2,476,892		—		30,320			2,507,213		—		2,507,213		—	2007	N/A
Rankin Road Land	Houston, TX		—		5,756,865		—		104,416			5,861,281		—		5,861,281		—	2007	N/A
Hollister Beltway 8 Land	Houston, TX		—		6,282,232		—		336,819			6,619,051		—		6,619,051		—	2008	N/A
Noxell Land	Hunt Valley, MD		—		2,040,690		—		1,173			2,041,863		—		2,041,863		—	2001	N/A
Liberty Business Park Land	Jacksonville, FL		—		456,269		—		82,690			538,959		—		538,959		—	1995	N/A
7024 AC Skinner Parkway	Jacksonville, FL		—		751,448		—		73,504			824,952		—		824,952		—	1995	N/A
Belfort Road	Jacksonville, FL		—		492,908		—		87,649			580,557		—		580,557		—	1998	N/A
Salisbury Road Land	Jacksonville, FL		—		1,402,337		—		216,467			1,618,804		—		1,618,804		—	2000	N/A
Skinner Land Parcel B	Jacksonville, FL		—		2,295,790		—		1,231,240			3,527,030		—		3,527,030		—	2005	N/A
Imeson Road Land	Jacksonville, FL		—		4,153,948		—		825,764			4,979,712		—		4,979,712		—	2008	N/A
Kent County, UK	Kent County, UK		—		—		—		—			6,023,565		—		6,023,565		—	1999	N/A
Commodore Business Park	Logan, NJ		—		792,118		—		1,139,214			1,931,332		—		1,931,332		—	1995	N/A
Quarry Ridge Land	Malvern, PA		—		4,774,994		—		4,961,903			9,736,897		—		9,736,897		—	2001	N/A
Park Place South Land	Milwaukee, WI		—		1,290,032		—		1,558,860			2,848,892		—		2,848,892		—	1999	N/A
Monarch Towne Center Land	Mirarar, FL		—		6,085,337		—		413,926			6,499,264		—		6,499,264		—	2006	N/A
South 27th Street Land	Oak Creek, WI		—		2,169,232		—		2,635,191			4,804,423		—		4,804,423		—	2006	N/A
Beachline Industrial Park Land	Orlando, FL		—		365,230		—		(0	)		365,230		—		365,230		—	2006	N/A
26th Street North Land	Philadelphia, PA		—		235,168		—		1,944,557			2,179,725		—		2,179,725		—	2009	N/A
Cotton Center Land	Phoenix, AZ		—		1,359,134		—		18,970,703			20,329,837		—		20,329,837		—	2007	N/A
Eastport VIII	Richmond, VA		—		382,698		—		3,325			386,023		—		386,023		—	1997	N/A
Eastport IX	Richmond, VA		—		211,627		—		3,325			214,952		—		214,952		—	1997	N/A
Woodlands Center Land	Sandston, VA		—		148,314		—		21,717			170,031		—		170,031		—	1996	N/A
Northsight Land	Scottsdale, AZ		—		6,176,464		—		2,204,597			8,381,061		—		8,381,061		—	2005	N/A
Old Scotland Road Land	Shippensburg, PA		—		8,322,686		—		3,010,371			11,333,058		—		11,333,058		—	2007	N/A
Bridgeway II Land	Suffolk, VA		—		603,391		—		2,023,007			2,626,399		—		2,626,399		—	2005	N/A
Suffolk Land	Suffolk, VA		—		2,715,714		—		695,846			3,411,560		—		3,411,560		—	2006	N/A
6119 W. Linebaugh Avenue	Tampa, FL		—		180,136		—		30,500			210,635		—		210,635		—	2000	N/A
Tampa Triangle Land	Tampa, FL		—		10,358,826		—		1,183,339			11,542,165		—		11,542,165		—	2006	N/A
Renaissance Park Land	Tampa, FL		—		1,995,375		—		219,098			2,214,473		—		2,214,473		—	2007	N/A
Subtotal Land Held for Development		$	229,953	$	42,338,181	$	—	$	16,159,688		$	209,250,733	$	—	$	209,250,733	$	—
Total All Properties		$	55,995,585	$	822,556,856	$	1,798,426,710	$	2,722,972,732		$	1,074,047,443	$	4,420,661,719	$	5,494,709,162	$	1,090,685,108

* Denotes property is collateralized under mortgages with Metropolitan Life, LaSalle Bank, Allianz, John Hancock and Mutual of Omaha totaling $264.3 million.

122

SCHEDULE III

LIBERTY PROPERTY LIMITED PARTNERSHIP
REAL ESTATE AND ACCUMULATED DEPRECIATION
(In thousands)

A summary of activity for real estate and accumulated depreciation is as follows:

	Year Ended December 31,
	2010			2009			2008
REAL ESTATE:
Balance at beginning of year	$	5,417,585		$	5,332,122		$	5,584,173
Additions		123,693			155,797			311,442
Disposition of property		(46,566	)		(70,334	)		(563,493	)
Balance at end of year	$	5,494,712		$	5,417,585		$	5,332,122
ACCUMULATED DEPRECIATION:
Balance at beginning of year	$	970,935		$	852,425		$	744,691
Depreciation expense		147,299			144,548			147,243
Disposition of property		(27,549	)		(26,038	)		(39,509	)
Balance at end of year	$	1,090,685		$	970,935		$	852,425

123

ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE

None.

ITEM 9A. CONTROLS AND PROCEDURES

Controls and Procedures with respect to the Trust

(a) Evaluation of Disclosure Controls and Procedures

The Trust’s management, with the participation of its Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of its disclosure controls and procedures (as defined in Rule 13a-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)) as of the end of the period covered by this report. Based on this evaluation, the Trust’s Chief Executive Officer and Chief Financial Officer have concluded that the Trust’s disclosure controls and procedures, as of the end of the period covered by this report, were functioning effectively to provide reasonable assurance that information required to be disclosed by the Trust in its reports filed or submitted under the Exchange Act is (i) recorded, processed, summarized and reported within the time periods specified in SEC’s rules and forms and (ii) accumulated and communicated to the Trust’s management, including its principal executive and principal financial officers, or persons performing similar function, as appropriate to allow timely decisions regarding required disclosure.

(b) Management’s Annual Reports on Internal Control Over Financial Reporting

Management’s Annual Report on Internal Control Over Financial Reporting, which appears on page 40, is incorporated by reference herein.

(c) Attestation Reports of the Registered Public Accounting Firm

The Attestation Reports of the Registered Public Accounting Firm, which appear on pages 41 and 42, are incorporated by reference herein.

(d) Changes in Internal Control Over Financial Reporting

There were no changes in the Trust’s internal control over financial reporting during the quarter ended December 31, 2010 that have materially affected or are reasonable likely to materially affect the Company’s internal control over financial reporting.

Controls and Procedures with respect to the Operating Partnership

(a) Evaluation of Disclosure Controls and Procedures

The Trust’s management, with the participation of its Chief Executive Officer and Chief Financial Officer, on behalf of the Trust in its capacity as the general partner of the Operating Partnership, evaluated the effectiveness of its disclosure controls and procedures (as defined in Rule 13a-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)) as of the end of the period covered by this report. Based on this evaluation, the Trust’s Chief Executive Officer and Chief Financial Officer have concluded that the Operating Partnership’s disclosure controls and procedures, as of the end of the period covered by this report, were functioning effectively to provide reasonable assurance that information required to be disclosed by the Operating Partnership in its reports filed or submitted under the Exchange Act is (i) recorded, processed, summarized and reported within the time periods specified in SEC’s rules and forms and (ii) accumulated and communicated to the Trust’s management, including its principal executive and principal financial officers, or persons performing similar function, as appropriate to allow timely decisions regarding required disclosure.

(b) Management’s Annual Reports on Internal Control Over Financial Reporting

Management’s Annual Report on Internal Control Over Financial Reporting, which appears on page 83, is incorporated by reference herein.

124

(c) Attestation Reports of the Registered Public Accounting Firm

The Attestation Reports of the Registered Public Accounting Firm, which appear on pages 84 and 85, are incorporated by reference herein.

(d) Changes in Internal Control Over Financial Reporting

There were no changes in the Operating Partnership’s internal control over financial reporting during the quarter ended December 31, 2010 that have materially affected or are reasonable likely to materially affect the Operating Partnership’s internal control over financial reporting.

ITEM 9B. OTHER INFORMATION

None.

125

PART III

ITEM 10. TRUSTEES, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE

The information required by Item 10 shall be included in the Proxy Statement to be filed relating to the Company’s 2011 Annual Meeting of Shareholders and is incorporated herein by reference.

ITEM 11. EXECUTIVE COMPENSATION

The information required by Item 11 shall be included in the Proxy Statement to be filed relating to the Company’s 2011 Annual Meeting of Shareholders and is incorporated herein by reference.

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED SHAREHOLDER MATTERS

The information required by Item 12 shall be included in the Proxy Statement to be filed relating to the Company’s 2011 Annual Meeting of Shareholders and is incorporated herein by reference.

Securities Authorized for Issuance Under Equity Compensation Plans

The information required by Item 12 shall be included in the Proxy Statement to be filed relating to the Company’s 2011 Annual Meeting of Shareholders and is incorporated herein by reference.

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS AND TRUSTEE INDEPENDENCE

The information required by Item 13 shall be included in the Proxy Statement to be filed relating to the Company’s 2011 Annual Meeting of Shareholders and is incorporated herein by reference.

ITEM 14. PRINCIPAL ACCOUNTANT FEES AND SERVICES

The information required by Item 14 shall be included in the Proxy Statement to be filed relating to the Company’s 2011 Annual Meeting of Shareholders and is incorporated herein by reference.

126

PART IV

ITEM 15. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

The following consolidated financial statements of Liberty Property Trust and Liberty Property Limited Partnership are included in Item 8.

1. REPORTS OF ERNST & YOUNG LLP, INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM AND CONSOLIDATED FINANCIAL STATEMENTS

Management’s Annual Report on Internal Control Over Financial Reporting — Liberty Property Trust

Reports of Independent Registered Public Accounting Firm — Liberty Property Trust

Financial Statements — Liberty Property Trust

Balance Sheets:
Liberty Property Trust Consolidated as of December 31, 2010 and 2009

Statements of Operations:
Liberty Property Trust Consolidated for the years ended December 31, 2010, 2009, and 2008

Statements of Equity:
Liberty Property Trust Consolidated for the years ended December 31, 2010, 2009, and 2008

Statements of Cash Flows:
Liberty Property Trust Consolidated for the years ended December 31, 2010, 2009, and 2008

Notes to Consolidated Financial Statements — Liberty Property Trust

Management’s Annual Report on Internal Control Over Financial Reporting — Liberty Property Limited Partnership

Reports of Independent Registered Public Accounting Firm — Liberty Property Limited Partnership

Financial Statements — Liberty Property Limited Partnership

Balance Sheets:
Liberty Property Limited Partnership Consolidated as of December 31, 2010 and 2009

Statements of Operations:
Liberty Property Limited Partnership Consolidated for the years ended December 31, 2010, 2009, and 2008

Statements of Owners’ Equity:
Liberty Property Limited Partnership Consolidated for the years ended December 31, 2010, 2009, and 2008

Statements of Cash Flows:
Liberty Property Limited Partnership Consolidated for the years ended December 31, 2010, 2009, and 2008

Notes to Consolidated Financial Statements — Liberty Property Limited Partnership

127

2. FINANCIAL STATEMENT SCHEDULES:

Schedule III — Real Estate and Accumulated Depreciation as of December 31, 2010 for Liberty Property Trust

All other schedules are omitted because they are either not required or the required information is shown in the financial statements or notes thereto.

Schedule III — Real Estate and Accumulated Depreciation as of December 31, 2010 for Liberty Property Limited Partnership

All other schedules are omitted because they are either not required or the required information is shown in the financial statements or notes thereto.

128

3. EXHIBITS

The following exhibits are filed herewith or are incorporated by reference to exhibits previously filed.

EXHIBIT NO.		DESCRIPTION
	2.1	Agreement and Plan Merger, dated as of July 23, 2007, by and among Liberty Property Trust, Liberty Property Limited Partnership, Liberty Acquisition LLC, Republic Property Trust and Republic Property Limited Partnership. (Incorporated by reference to Exhibit 2.1 to the Current Report on Form 8-K of the Registrants, filed with the Securities and Exchange Commission on July 24, 2007).
	3.1.1	Amended and Restated Declaration of Trust of the Trust (Incorporated by reference to Exhibit 3.1.1 filed with the Registrants’ Current Report on Form 8-K filed with the Commission on June 25, 1997 (the “June 1997 Form 8-K”)).
	3.1.2	Articles Supplementary to the Amended and Restated Declaration of Trust of the Trust Relating to Designation, Preferences, and Rights of Series A Junior Participating Preferred Shares of the Trust (Incorporated by reference to Exhibit 3.1.3 filed with the Registrants’ Annual Report on Form 10-K for the fiscal year ended December 3l, 1997).
	3.1.3	Articles Supplementary to the Amended and Restated Declaration of Trust of the Trust relating to the 9.25% Series B Cumulative Redeemable Preferred Shares of Beneficial Interest (Incorporated by reference to Exhibit 3.1.2 filed with the Registrants’ Quarterly Report on Form 10-Q for the fiscal quarter ended June 30, 1999 (the “Second Quarter 1999 Form 10-Q”)).
	3.1.4	Articles Supplementary to the Amended and Restated Declaration of Trust of the Trust relating to the 7.625% Series D Cumulative Redeemable Preferred Shares of Beneficial Interest (Incorporated by reference to Exhibit 3.1.1 filed with the Registrants’ Quarterly Report on Form 10-Q for the fiscal quarter ended June 30, 2002 (the “Second Quarter 2002 Form 10-Q”)).
	3.1.5	Articles of Amendment to the Amended and Restated Declaration of Trust of the Trust, filed with the State Department of Assessments and Taxation of Maryland on June 21, 2004 (Incorporated by reference to Exhibit 3.1 with Registrants’ Quarterly Report on Form 10-Q for the fiscal quarter ended June 30, 2004 (the “Second Quarter 2004 Form 10-Q”)).
	3.1.6	Restatement of the Amended Restated Declaration of Trust of the Trust, filed with the State Department of Assessments and Taxation of Maryland on June 21, 2004 (Incorporated by reference to Exhibit 3.2 to the Second Quarter 2004 Form 10-Q).
	3.1.7	Articles Supplementary, as filed with the State Department of Assessments and Taxation of Maryland on September 1, 2004 (Incorporated by reference to Exhibit 3(i) to the Current Report on Form 8-K of the Registrants, filed with the Commission on September 2, 2004 (the “September 2, 2004 Form 8-K”)).
	3.1.8	Articles Supplementary to the Amended and Restated Declaration of Trust of the Trust relating to the 7.00% Series E Cumulative Redeemable Preferred Shares of Beneficial Interest (Incorporated by reference to Exhibit 3(i) to the Current Report on Form 8-K of the Registrants, filed with the Commission on June 17, 2005 (the “June 17, 2005 Form 8-K”)).
	3.1.9	Articles Supplementary to the Amended and Restated Declaration of Trust of the Trust relating to the 6.65% Series F Cumulative Redeemable Preferred Shares of Beneficial Interest (Incorporated by reference to Exhibit 3(i) to the Current Report on Form 8-K of the Registrants, filed with the Commission on June 30, 2005 (the “June 30, 2005 Form 8-K”)).
	3.1.10	Articles Supplementary to the Amended and Restated Declaration of Trust of the Trust relating to the 6.65% Series F Cumulative Redeemable Preferred Shares of Beneficial Interest (Incorporated by reference to Exhibit 3(i) to the Current Report on Form 8-K of the Registrants, filed with the Commission on August 24, 2005).

129

EXHIBIT NO.		DESCRIPTION
	3.1.11	Articles Supplementary to the amended and Restated Declaration of Trust of the Trust relating to the 6.70% Series G Cumulative Redeemable Shares of Beneficial Interest (Incorporated by reference to Exhibit 3(i) to the Current Report on Form 8-K of the Registrants, filed with the Commission on December 18, 2006 (the “December 18, 2006 Form 8-K”)).
	3.1.12	Articles Supplementary to the Amended and Restated Declaration of Trust of the Trust relating to the 7.40% Series H Cumulative Redeemable Preferred Partnership Interests (Incorporated by reference to Exhibit 3(i) to the Current Report on Form 8-K of the Registrants, filed with the Commission on August 23, 2007 (the “August 23, 2007 Form 8-K”)).
	3.1.13	Second Restated and Amended Agreement of Limited Partnership of the Operating Partnership, dated as of October 22, 1997 (Incorporated by reference to Exhibit 3.1.1 filed with the Registrants Quarterly Report on Form 10-Q for the fiscal quarter ended September 30, 1997 (the “Third Quarter 1997 Form 10-Q”)).
	3.1.14	First Amendment to Second Restated and Amended Agreement of Limited Partnership of the Operating Partnership (Incorporated by reference to Exhibit 3.1.1 to the Second Quarter 1999 Form 10-Q).
	3.1.15	Second Amendment to Second Restated and Amended Agreement of Limited Partnership of the Operating Partnership (Incorporated by reference to Exhibit 3.1.2 to the First Quarter 2000 Form 10-Q).
	3.1.16	Third Amendment to Second Restated and Amended Agreement of Limited Partnership of the Operating Partnership (Incorporated by reference to Exhibit 3.1.2 to the Second Quarter Form 2002 10-Q).
	3.1.17	Fourth Amendment to the Second Amended and Restated Agreement of Limited Partnership of the Operating Partnership (Incorporated by reference to Exhibit 10 to the September 2, 2004 Form 8-K).
	3.1.18	Fifth Amendment to the Second Amended and Restated Agreement of Limited Partnership of Liberty Property Limited Partnership (Incorporated by reference to Exhibit 10 to the June 17, 2005 8-K).
	3.1.19	Sixth Amendment to the Second Amended and Restated Agreement of Limited Partnership of Liberty Property Limited Partnership (Incorporated by reference to Exhibit 10 to the June 30, 2005 8-K).
	3.1.20	Amendment No. 1 to the Sixth Amendment to the Second Amended and Restated Agreement of Limited Partnership of Liberty Property Limited Partnership (Incorporated by reference to Exhibit 10 to the Current Report on Form 8-K of the Registrants, filed with the Commission on August 24, 2005).
	3.1.21	Amendment No. 2 to the Sixth Amendment to the Second Amended and Restated Agreement of Limited Partnership of Liberty Property Limited Partnership (Incorporated by reference to Exhibit 10 to the Current Report on Form 8-K of the Registrants, filed with the Commission on December 23, 2005).
	3.1.22	Seventh Amendment to the Second Amended and Restated Agreement of Limited Partnership of Liberty Property Limited Partnership (Incorporated by reference to Exhibit 10 to the December 18, 2006 Form 8-K).
	3.1.23	Eighth Amendment to the Second Amendment and Restated Agreement of Limited Partnership of Liberty Property Limited Partnership (Incorporated by reference to Exhibit 10 to the August 23, 2007 Form 8-K).

130

EXHIBIT NO.			DESCRIPTION
	3.1.24	*	Amended and Restated Schedule A to the Second Restated and Amended Agreement of Limited Partnership of the Operating Partnership.
	3.1.25		Liberty Property Trust First Amended and Restated By-Laws of the Trust, as Amended on December 6, 2007 (Incorporated by reference to Exhibit 3.1 filed with the Current Report on Form 8-K filed with the Commission on December 12, 2007).
	3.1.26		Articles of Amendment to the Amended and Restated Declaration of Trust of the Trust (Incorporated by reference to Annex A to the Registrant’s Definitive Proxy Statement for the Annual Meeting of Shareholders held on May 20, 2010, filed with the Commission on April 20, 2010).
	4.1		Indenture (the “First Indenture”), dated as of August 14, 1997, between the Operating Partnership, as Obligor, and The First National Bank of Chicago (“First Chicago”), as Trustee (Incorporated by reference to Exhibit 10.1 filed with the Third Quarter 1997 Form 10-Q).
	4.2		First Supplemental Indenture, dated as of August 14, 1997, between the Operating Partnership, as Issuer, and First Chicago, as Trustee, supplementing the First Indenture and relating to $100,000,000 principal amount of the 7.10% Senior Notes due 2004 and $100,000,000 principal amount of the 7.25% Senior Notes due 2007 of the Operating Partnership (Incorporated by reference to Exhibit 10.2 filed with the Third Quarter 1997 Form 10-Q).
	4.3		Senior Indenture (the “Second Indenture”), dated as of October 24, 1997, between the Operating Partnership, as Obligor, and First Chicago, as Trustee (Incorporated by reference to Exhibit 10.3 filed with the Third Quarter 1997 Form 10-Q).
	4.4		First Supplemental Indenture, dated as of October 24, 1997, between the Operating Partnership, as Issuer, and First Chicago, as Trustee, supplementing the Second Indenture and relating to the Fixed Rate and Floating Rate Medium-Term Notes due Nine Months or More from Date of Issue of the Operating Partnership (Incorporated by reference to Exhibit 10.4 filed with the Third Quarter 1997 Form 10-Q).
	4.5		Second Supplemental Indenture, dated as of January 12, 1998, between the Operating Partnership, as Issuer, and First Chicago, as Trustee, supplementing the Second Indenture, and relating to the Fixed Rate and Floating Rate Medium-Term Notes due Nine Months or more from Date of Issue of the Operating Partnership (Incorporated by reference to Exhibit 4.1 filed with the Registrants’ Quarterly Report on Form 10-Q for the fiscal quarter ended March 31, 1998 (the “First Quarter 1998 Form 10-Q”)).
	4.6		Third Supplemental Indenture, dated as of April 20, 1999, between the Operating Partnership, as Issuer, and the First National Bank of Chicago, as Trustee, supplementing the Second Indenture and relating to the $250,000,000 principal amount of 7.75% Senior Notes, due 2009 of the Operating Partnership (Incorporated by reference to Exhibit 4 filed with the Registrants’ Quarterly Report on Form 10-Q for the fiscal quarter ended March 31, 1999 (the “First Quarter 1999 Form 10-Q”)).
	4.7		Fourth Supplemental Indenture, dated as of July 26, 2000, between the Operating Partnership, as Issuer, and Bank One Trust Company, N.A., as Trustee, supplementing the Senior Indenture, dated as of October 24, 1997, between the Operating Partnership, as Obligor, and Bank One Trust Company, N.A. (as successor to the First National Bank of Chicago), as Trustee, and relating to $200,000,000 principal amount of 8.5% Senior Notes due 2010 of the Operating Partnership (Incorporated by reference to Exhibit 4 to the Second Quarter 2000 Form 10-Q).
	4.8		Fifth Supplemental Indenture, dated as of March 14, 2001, between the Operating Partnership, as Issuer, and Bank One Trust Company, N.A., as Trustee, supplementing the Senior Indenture, dated as of October 24, 1997, between the Operating Partnership, as Obligor, and Bank One Trust Company, N.A. (as successor to the First National Bank of Chicago), as Trustee, and relating to $250,000,000 principal amount of 7.25% Senior Notes due 2011 of the Operating Partnership (Incorporated by reference to Exhibit 4.10 filed with the Registrants’ Annual Report on Form 10-K for the fiscal year ended December 31, 2000).

131

EXHIBIT NO.		DESCRIPTION
	4.9	Sixth Supplemental Indenture, dated as of August 22, 2002, between Liberty Property Limited Partnership, as Issuer, and Bank One Trust Company, N.A., as Trustee, supplementing the Senior Indenture, dated as of October 24, 1997, between Liberty Property Limited Partnership, as Obligor, and Bank One Trust Company, N.A. (as successor to the First National Bank of Chicago), as Trustee, and relating to $150,000,000 principal amount of 6.375% Senior Notes due 2012 of Liberty Property Limited Partnership (Incorporated by reference to Exhibit 3.1.1 filed with the Registrants’ Quarterly Report on Form 10-Q for the fiscal quarter ended September 30, 2002 (the “Third Quarter 2002 Form 10-Q”)).
	4.10	Seventh Supplemental Indenture, dated as of August 10, 2004, between Liberty Property Limited Partnership, as Issuer, and Bank One Trust Company, N.A., as Trustee, supplementing the Senior Indenture, dated as of October 24, 1997, between Liberty Property Limited Partnership, as Obligor, and Bank One Trust Company, National Association. (as successor to the First National Bank of Chicago), as Trustee, and relating to $200,000,000 principal amount of 5.65% Senior Notes due 2012 of Liberty Property Limited Partnership (Incorporated by reference to Exhibit 4.1.2 filed with the Registrants’ Quarterly Report on Form 10-Q for the fiscal quarter ended September 30, 2004 (the “Third Quarter 2004 Form 10-Q”)).
	4.11	Eighth Supplemental Indenture, dated as of March 1, 2005, between Liberty Property Limited Partnership, as Issuer, and Bank One Trust Company, as Trustee, supplementing the Senior Indenture, dated as of October 24, 1997, between Liberty Property Limited Partnership, as Obligor, and Bank One Trust Company, National Association (as successor to the First National Bank of Chicago), as Trustee, and relating to $300,000,000 principal amount of 5.125% Senior Notes due 2015 of Liberty Property Limited Partnership (Incorporated by reference to Exhibit 4.2 filed with the Registrants’ Current Report on Form 8-K/A filed with the Commission on March 1, 2005 (the “March 2005 Form 8-K”)).
	4.12	Ninth Supplemental Indenture, dated as of December 18, 2006, between Liberty Property Limited Partnership, as Issuer, and The Bank of New York Trust Company, N.A., as Trustee, supplementing the Senior Indenture, dated as of October 24, 1997, between Liberty Property Limited Partnership, as Obligor, and The Bank of New York Trust Company, N.A., (as successor to J.P. Morgan Trust Company, National Association and the First National Bank of Chicago), as Trustee, and relating to $300,000,000 principal amount of 5.50% Senior Notes due 2016 of Liberty Property Limited Partnership (Incorporated by reference to Exhibit 4.13 to the Registrants’ Annual Report on Form 10-K for the fiscal year ended December 31, 2006).
	4.13	Tenth Supplemental Indenture, dated as of September 25, 2007, between Liberty Property Limited Partnership, as Issuer, and The Bank of New York Trust Company, N.A., as Trustee, supplementing the Senior Indenture, dated as of October 24, 1997, between Liberty Property Limited Partnership, as Obligor, and The Bank of New York Trust Company, N.A., (as successor to J.P. Morgan Trust Company, National Association and the First National Bank of Chicago), as Trustee, and relating to $300,000,000 principal amount of 6.625% Senior Notes due 2017 of Liberty Property Limited Partnership (Incorporated by reference to Exhibit 4.1 to the Registrants’ Quarterly Report on Form 10-Q for the fiscal quarter ended September 30, 2007).
	4.14	Note, Relating to the Issuance by the Operating Partnership, on January 22, 1998, of $75 Million Principal Amount of its 6.375% Medium-Term Notes due 2013, Putable/Callable 2003 (Incorporated by reference to Exhibit 4.2 filed with the First Quarter 1998 Form 10-Q).
	4.15	Note, Relating to the Issuance by the Operating Partnership, on January 23, 1998, of $100 Million Principal Amount of its 7.50% Medium-Term Notes due 2018 (Incorporated by reference to Exhibit 4.3 filed with the First Quarter 1998 Form 10-Q).
	4.16	Note, Relating to the Issuance by the Operating Partnership, on June 5, 1998, of $100 Million Principal Amount of its 6.60% Medium-Term Notes due 2002 (Incorporated by reference to Exhibit 4 filed with the Registrants’ Quarterly Report on Form 10-Q for the fiscal quarter ended June 30, 1998 (the “Second Quarter 1998 Form 10-Q”)).

132

EXHIBIT NO.			DESCRIPTION
	4.17		Note, Relating to the Issuance by the Operating Partnership on November 24, 1998, of $20 Million Principal Amount of its 8.125% Medium-Term Notes due January 15, 2009 (Incorporated by reference to Exhibit 4.11 filed with the Registrants’ Annual Report on Form 10-K for the fiscal year ended December 31, 1998).
	4.18		Senior Indenture, dated as of September 22, 2010, between the Operating Partnership, as Obligor, and U.S. Bank National Association, as Trustee (Incorporated by reference to Exhibit 4.3 to Post-Effective Amendment No. 1 to the Registration Statement on Form S-3 of the Registrants (Commission File No. 333-150737) filed with the Commission on September 22, 2010).
	4.19	*	First Supplemental Indenture, dated as of September 27, 2010, between the Operating Partnership, as Issuer, and U.S. Bank National Association, as Trustee, supplementing the Senior Indenture, dated as of September 22, 2010, between the Operating Partnership, as Obligor, and U.S. Bank National Association, as Trustee, and relating to $350,000,000 principal amount of 4.75% Senior Notes due 2020 of Liberty Property Limited Partnership.
	10.1	@	Liberty Property Trust Amended and Restated Share Incentive Plan as amended effective May 21, 2009 (Incorporated by reference to Appendix A to the Registrant’s Definitive Proxy Statement for the Annual Meeting of Shareholders held on May 21, 2009, filed with the Commission on April 17, 2009).
	10.2		Contribution Agreement (Incorporated by reference to Exhibit 10.5 filed with the Form S-11).
	10.3		Amended and Restated Limited Partnership Agreements of Pre-existing Pennsylvania Partnerships (Incorporated by reference to Exhibit 10.6 filed with the Form S-11).
	10.4		Agreement of Sale for the Acquisition Properties (Incorporated by reference to Exhibit 10.7 filed with the Form S-11).
	10.5		Option Agreement and Right of First Offer (Incorporated by reference to Exhibit 10.8 filed with the Form S-11).
	10.6		Form of Indemnity Agreement (Incorporated by reference to Exhibit 10.9 filed with the Form S-11).
	10.7		Contribution Agreement among the Trust, the Operating Partnership and the Contributing Owners described therein, related to the Lingerfelt Properties (Incorporated by reference to Exhibit 10.1 filed with the Registrants’ Current Report on Form 8-K filed with the Commission on March 3, 1995).
	10.8.1		Amended and Restated Credit Agreement, dated as of December 22, 2005, by and among the Operating Partnership, the Trust, certain affiliated co-borrowers, with Bank of America, N.A. as Administrative Agent, JPMorgan Chase Bank, N.A., as Syndication Agent, Wachovia Bank, National Association, SunTrust Bank and Citizens Bank of Pennsylvania, as Documentation Agents, PNC Bank, National Association and Wells Fargo Bank, National Association, as Managing Agents, Banc of America Securities LLC and J.P. Morgan Securities Inc., as Joint Lead Arrangers and Joint Bookrunners, and the lenders a party thereto (Incorporated by reference to Exhibit 10.8 filed with Registrants’ Annual Report on Form 10-K for the year ended December 31, 2006).

133

EXHIBIT NO.			DESCRIPTION
	10.8.2		Second Amended and Restated Credit Agreement, dated as of August 31, 2010, by and among Liberty Property Limited Partnership, Liberty Property Trust, Bank of America, N.A. as Administrative Agent, JPMorgan Chase Bank, N.A., as Syndication Agent, Wells Fargo Bank, N.A., Citizens Bank, SunTrust Bank and PNC Bank, National Association as Documentation Agents, Citicorp North America, Inc., UBS Loan Finance LLC, The Bank of Nova Scotia, Capital One Bank and U.S. Bank National Association, as Managing Agents, Banc of America Securities LLC and J.P. Morgan Securities Inc., as Joint Bookrunners and Joint Lead Arrangers, and the lenders a party thereto. (Incorporated by reference to Exhibit 10.1 filed with the Registrants’ Current Report on Form 8-K filed with the Commission on September 17, 2010).
	10.9	@	Liberty Property Trust — Amended Management Severance Plan (Incorporated by reference to Exhibit 10.9 to the Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 2008).
	10.10	@	Liberty Property Trust — Employee Stock Purchase Plan (Incorporated by reference to Exhibit 10.14 filed with the Registrant’s Annual Report on Form 10-K for the year ended December 31, 2000).
	10.11	@	Liberty Property Trust 2008 Long-Term Incentive Plan (Incorporated by reference to Exhibit 10.1 filed with the Registrant’s Quarterly Report on Form 10-Q for the fiscal quarter ended March 31, 2008 (the “First Quarter 2008 Form 10-Q”)).
	10.12	@	Form of Restricted Share Grant under the Liberty Property Trust Amended and Restated Share Incentive Plan. (Incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K of the Registrants filed with the Commission on February 24, 2005 (the “February 24, 2005 8-K”)).
	10.13	@	Form of Option Grant Agreement under the Liberty Property Trust Amended and Restated Share Incentive Plan (Incorporated by reference to Exhibit 10.2 filed with the First Quarter 2008 Form 10-Q).
	10.14	@	Form of 2009 Long Term Incentive Plan Target Unit Award Agreement (Incorporated by reference to Exhibit 10.2 filed with the Registrants’ Quarterly Report on Form 10-Q for the fiscal quarter ended June 30, 2009).
	10.15		Amended and Restated Limited Partnership of Liberty/Commerz 1701 JFK Boulevard Limited Partnership, dated as of April 11, 2006, by and among Liberty Property Philadelphia Corporation IV East, as general partner, and the Operating Partnership and 1701 JFK Boulevard Philadelphia, L.P. as limited partners (Incorporated by reference to Exhibit 10.3 filed with the Registrants’ Quarterly Report on Form 10-Q for the fiscal quarter ended June 30, 2006 (the “Second Quarter 2006 Form 10-Q”)).
	10.16		NOI Support Agreement, dated as of April 11, 2006, by Liberty Property Limited Partnership in favor of Liberty/Commerz 1701 JFK Boulevard, L.P. and 1701 JFK Boulevard Philadelphia, L.P. (Incorporated by reference to Exhibit 10.4 filed with the Registrants’ Second Quarter 2006 Form 10-Q).
	10.17		Completion and Payment Agreement and Guaranty, dated as of April 11, 2006, by the Operating Partnership for the benefit of 1701 JFK Boulevard Philadelphia, L.P. and Liberty/Commerz 1701 JFK Boulevard L.P. (Incorporated by reference to Exhibit 10.5 filed with the Registrants’ Second Quarter 2006 Form 10-Q).
	10.18	+	Agreement of Limited Partnership of Liberty Washington, L.P. by and between Liberty Washington Venture, LLC and New York State Common Retirement Fund dated as of October 4, 2007 (Incorporated by reference to Exhibit 10.18 filed with the Registrants’ Quarterly Report on Form 10-Q for the fiscal quarter ended June 30, 2010).

134

EXHIBIT NO.			DESCRIPTION
	10.19	+	Contribution Agreement among New York State Common Retirement Fund and Liberty Property Limited Partnership and Liberty Washington, L.P. dated October 4, 2007 (Incorporated by reference to Exhibit 10.19 filed with the Registrants’ Quarterly Report on Form 10-Q for the fiscal quarter ended June 30, 2010).
	10.20		Equity Distribution Agreement, dated December 18, 2008, by and among Liberty Property Trust, Liberty Property Limited Partnership and Citigroup Global Markets Inc. (Incorporated by reference to Exhibit 1.1 filed with the Registrants’ Current Report on Form 8-K filed with the Commission on December 18, 2008).
	12	*	Statement re: Computation of Ratios.
	21	*	Subsidiaries.
	23.1	*	Consent of Ernst & Young LLP relating to the Trust.
	23.2	*	Consent of Ernst & Young LLP relating to the Operating Partnership.
	31.1	*	Certifications of the Chief Executive Officer of Liberty Property Trust required by Rule 13a-14(a) under the Securities Exchange Act of 1934.
	31.2	*	Certifications of the Chief Financial Officer of Liberty Property Trust required by Rule 13a-14(a) under the Securities Exchange Act of 1934.
	31.3	*	Certifications of the Chief Executive Officer of Liberty Property Trust, in its capacity as the general partner of Liberty Property Limited Partnership, required by Rule 13a-14(a) under the Securities Exchange Act of 1934.
	31.4	*	Certifications of the Chief Financial Officer of Liberty Property Trust, in its capacity as the general partner of Liberty Property Limited Partnership, required by Rule 13a-14(a) under the Securities Exchange Act of 1934.
	32.1	*	Certifications of the Chief Executive Officer of Liberty Property Trust required under Rule 13a-14(b) of the Securities Exchange Act of 1934, as amended. (This exhibit shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section. Further, this exhibit shall not be deemed to be incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended.)
	32.2	*	Certifications of the Chief Financial Officer of Liberty Property Trust required by Rule 13a-14(b) under the Securities Exchange Act of 1934, as amended. (This exhibit shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section. Further, this exhibit shall not be deemed to be incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended.)

135

EXHIBIT NO.			DESCRIPTION
	32.3	*	Certifications of the Chief Executive Officer of Liberty Property Trust, in its capacity as the general partner of Liberty Property Limited Partnership, required by Rule 13a-14(b) under the Securities Exchange Act of 1934, as amended. (This exhibit shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section. Further, this exhibit shall not be deemed to be incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended.)
	32.4	*	Certifications of the Chief Financial Officer of Liberty Property Trust, in its capacity as the general partner of Liberty Property Limited Partnership, required by Rule 13a-14(b) under the Securities Exchange Act of 1934, as amended. (This exhibit shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section. Further, this exhibit shall not be deemed to be incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended.)

*	Filed herewith
+	Confidential treatment has been granted by the Securities and Exchange Commission with respect to portions of this exhibit pursuant to Rule 24b-2 under the Securities Exchange Act of 1934, as amended.
@	Compensatory plan or arrangement.

136

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	LIBERTY PROPERTY TRUST
Date: February 25, 2011	By:	/s/ WILLIAM P. HANKOWSKY
		WILLIAM P. HANKOWSKY
		CHAIRMAN, PRESIDENT AND CHIEF EXECUTIVE OFFICER

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the Registrant and in the capacities and on the dates indicated.

/s/ WILLIAM P. HANKOWSKY William P. Hankowsky	Chairman of the Board of Trustees, President and Chief Executive Officer (Principal Executive Officer)	February 25, 2011
/s/ GEORGE J. ALBURGER, JR. George J. Alburger, Jr.	Executive Vice President and Chief Financial Officer (Principal Financial and Accounting Officer)	February 25, 2011
/s/ M. LEANNE LACHMAN M. Leanne Lachman	Trustee	February 25, 2011
/s/ FREDERICK F. BUCHHOLZ Frederick F. Buchholz	Trustee	February 25, 2011
/s/ J. ANTHONY HAYDEN J. Anthony Hayden	Trustee	February 25, 2011
/s/ DAVID L. LINGERFELT David L. Lingerfelt	Trustee	February 25, 2011
/s/ STEPHEN B. SIEGEL Stephen B. Siegel	Trustee	February 25, 2011
/s/ THOMAS C. DELOACH, JR. Thomas C. DeLoach, Jr.	Trustee	February 25, 2011
/s/ DANIEL P. GARTON Daniel P. Garton	Trustee	February 25, 2011
/s/ STEPHEN D. STEINOUR Stephen D. Steinour	Trustee	February 25, 2011
/s/ KATHERINE E. DIETZE Katherine E. Dietze	Trustee	February 25, 2011

137

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	LIBERTY PROPERTY LIMITED PARTNERSHIP BY: Liberty Property Trust General Partner
Date: February 25, 2011	By:	/s/ WILLIAM P. HANKOWSKY
		WILLIAM P. HANKOWSKY
		CHAIRMAN, PRESIDENT AND CHIEF EXECUTIVE OFFICER

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the Registrant and in the capacities and on the dates indicated.

/s/ WILLIAM P. HANKOWSKY William P. Hankowsky	Chairman of the Board of Trustees, President and Chief Executive Officer (Trustee of the General Partner)	February 25, 2011
/s/ GEORGE J. ALBURGER, JR. George J. Alburger, Jr.	Executive Vice President and Chief Financial Officer (Trustee of the General Partner)	February 25, 2011
/s/ M. LEANNE LACHMAN M. Leanne Lachman	Trustee of the General Partner	February 25, 2011
/s/ FREDERICK F. BUCHHOLZ Frederick F. Buchholz	Trustee of the General Partner	February 25, 2011
/s/ J. ANTHONY HAYDEN J. Anthony Hayden	Trustee of the General Partner	February 25, 2011
/s/ DAVID L. LINGERFELT David L. Lingerfelt	Trustee of the General Partner	February 25, 2011
/s/ STEPHEN B. SIEGEL Stephen B. Siegel	Trustee of the General Partner	February 25, 2011
/s/ THOMAS C. DELOACH, JR. Thomas C. DeLoach, Jr.	Trustee of the General Partner	February 25, 2011
/s/ DANIEL P. GARTON Daniel P. Garton	Trustee of the General Partner	February 25, 2011
/s/ STEPHEN D. STEINOUR Stephen D. Steinour	Trustee of the General Partner	February 25, 2011
/s/ KATHERINE E. DIETZE Katherine E. Dietze	Trustee of the General Partner	February 25, 2011

138

EXHIBIT INDEX

Exhibit No.		Description
	3.1.24	Amended and Restated Schedule A to the Second Restated and Amended Agreement of Limited Partnership of the Operating Partnership.
	4.19	First Supplemental Indenture, dated as of September 27, 2010, between the Operating Partnership, as Issuer, and U.S. Bank National Association, as Trustee, supplementing the Senior Indenture, dated as of September 22, 2010, between the Operating Partnership, as Obligor, and U.S. Bank National Association, as Trustee, and relating to $350,000,000 principal amount of 4.75% Senior Notes due 2020 of Liberty Property Limited Partnership.
	12	Statement re: Computation of Ratios.
	21	Subsidiaries.
	23.1	Consent of Ernst & Young LLP relating to the Trust.
	23.2	Consent of Ernst & Young LLP relating to the Operating Partnership.
	31.1	Certifications of the Chief Executive Officer of Liberty Property Trust required by Rule 13a-14(a) under the Securities Exchange Act of 1934.
	31.2	Certifications of the Chief Financial Officer of Liberty Property Trust required by Rule 13a-14(a) under the Securities Exchange Act of 1934.
	31.3	Certifications of the Chief Executive Officer of Liberty Property Trust, in its capacity as the general partner of Liberty Property Limited Partnership, required by Rule 13a-14(a) under the Securities Exchange Act of 1934.
	31.4	Certifications of the Chief Financial Officer of Liberty Property Trust, in its capacity as the general partner of Liberty Property Limited Partnership, required by Rule 13a-14(a) under the Securities Exchange Act of 1934.
	32.1	Certifications of the Chief Executive Officer of Liberty Property Trust required under Rule 13a-14(b) of the Securities Exchange Act of 1934, as amended. (This exhibit shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section. Further, this exhibit shall not be deemed to be incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended.)
	32.2	Certifications of the Chief Financial Officer of Liberty Property Trust required by Rule 13a-14(b) under the Securities Exchange Act of 1934, as amended. (This exhibit shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section. Further, this exhibit shall not be deemed to be incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended.)

139

Exhibit No.		Description
	32.3	Certifications of the Chief Executive Officer of Liberty Property Trust, in its capacity as the general partner of Liberty Property Limited Partnership, required by Rule 13a-14(b) under the Securities Exchange Act of 1934, as amended. (This exhibit shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section. Further, this exhibit shall not be deemed to be incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended.)
	32.4	Certifications of the Chief Financial Officer of Liberty Property Trust, in its capacity as the general partner of Liberty Property Limited Partnership, required by Rule 13a-14(b) under the Securities Exchange Act of 1934, as amended. (This exhibit shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section. Further, this exhibit shall not be deemed to be incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended.

140

EX-3.1.24

Exhibit 3.1.24

SCHEDULE ‘A’

Liberty Property Limited Partnership
Partnership Interests
As of December 31, 2010

	Number of
	Partnership
	Interests		%
Limited Partners
Balitsaris, Peter		58,542		0.0495	%
Carr, Claiborn		115,000		0.0973	%
Castorina, John		0		0.0000	%
Denny, Joseph		260,250		0.2201	%
Felix, Jill		195,043		0.1650	%
Fenza, Robert		195,043		0.1650	%
Fitzgerald, Ward		14,491		0.0123	%
Gildea, Larry		93,319		0.0789	%
Goldschmidt, Robert		22,895		0.0194	%
Hagan, Michael		14,491		0.0123	%
Hammers, David		244,426		0.2068	%
Kiel, Bob		14,491		0.0123	%
Kline, Earl		19,128		0.0162	%
Lutz, Jim		37,312		0.0316	%
Mazzarelli, James		14,491		0.0123	%
Messaros, Sharron		7,245		0.0061	%
Morrissey, Mary Beth		14,491		0.0123	%
Price, Leslie		76,668		0.0649	%
Reichert, Joseph		27,242		0.0230	%
Marital Trust for Susannah Rouse		460,418		0.3895	%
Trust for Congdon Children		95,347		0.0807	%
Trust for Hammers Children		95,348		0.0807	%
Trust for Mary Rouse		13,621		0.0115	%
Trust for Anne Rouse		13,621		0.0115	%
Trust for Rouse Younger Children		81,726		0.0691	%
Trust for Laurie Hammers		5,506		0.0047	%
Weitzmann, Mike		42,312		0.0358	%
Liberty Special Purpose Trust		10,574		0.0089	%
Thomas, Rebecca		8,076		0.0068	%
Trust for J. Ryan Lingerfelt		15,625		0.0132	%
Trust for Justin M. Lingerfelt		15,625		0.0132	%
Trust for Daniel K. Lingerfelt		15,625		0.0132	%
Trust for Catherine E. Lingerfelt		15,625		0.0132	%
Lingerfelt, Alan T.		268,750		0.2273	%
Lingerfelt, L. Harold		164,375		0.1390	%
Lingerfelt, David L.		30,674		0.0259	%

Liberty Property Limited Partnership
Partnership Interests — Continued
As of December 31, 2010

	Number of
	Partnership
	Interests		%
Limited Partners
Morris U. Ferguson Family Trust		6,000		0.0051	%
Lingerfelt, Carl C.		10,900		0.0092	%
Wright, Murray H.		7,500		0.0063	%
Latimer, Erle Marie		12,500		0.0106	%
Norman G. Samet Revocable Trust		14,013		0.0119	%
Mann, Bernard		14,012		0.0119	%
Rouse & Associates Maryland Partnership		20,000		0.0169	%
Helwig, A. Carl		169,737		0.1436	%
Sunday, James J.		79,348		0.0671	%
Walters, Charles J.		100,723		0.0852	%
Doyle, Margaret A.		0		0.0000	%
Stanford Baratz Revocable Trust		9,044		0.0077	%
F. Greek Logan Properties, LLC		33,682		0.0285	%
Virginia Acquisition I, LLC		228,144		0.1930	%
David Mandelbaum		228,144		0.1930	%
Nathan Mandelbaum		228,144		0.1930	%
Preferred Limited Partners
Belcrest Realty Corporation — Series B		250,000		N/A
Belwater Realty Corp. — Series B		1,260,000		N/A
Belbrook Realty Corporation — Series B		1,040,000		N/A
Clearfork Realty Corporation — Series B		750,000		N/A
Belvedere Equity Real Estate Corporation (12/16/10) — Series B		500,000		N/A
BSSF RP Holdings LLC — Series E		400,000		N/A
GSEP 2005 Realty Corp. — Series F		1,000,000		N/A
GSEP 2006 Realty Corp. — Series G		540,000		N/A
Belmar Realty Corporation — Series H		0		N/A
Belport Realty Corporation — Series H		400,000		N/A
Belrose Realty Corporation — Series H		1,000,000		N/A
Belshire Realty Corporation — Series H		500,000		N/A
Belterra Realty Corporation — Series H		600,000		N/A
Clearfork Realty Corporation (3/11/2010) — Series H		150,000		N/A
Beldore Realty Corporation — Series H		1,350,000		N/A
General Partner
Liberty Property Trust	GP			96.6678	%
Total Ownership				100.0000	%

General Partner — The partnership units for Liberty Property Trust have not been reflected because there is no conversion of units to shares by the general partner.

EX-4.19

Exhibit 4.19

Execution Copy

FIRST SUPPLEMENTAL INDENTURE, dated as of September 27, 2010, between LIBERTY PROPERTY LIMITED PARTNERSHIP, a Pennsylvania limited partnership (the “Company”), having its principal offices at 500 Chesterfield Parkway, Malvern, Pennsylvania 19355, and U.S. BANK NATIONAL ASSOCIATION, a national banking association organized under the laws of the United States of America, as trustee (the “Trustee”), having its Corporate Trust Office at Two Liberty Place, 50 S. 16th Street, Suite 2000, Mail Station: Ex-PA-WBSP, Philadelphia, PA 19102.

RECITALS

WHEREAS, the Company executed and delivered its Base Indenture (the “Base Indenture”), dated as of September 22, 2010, to the Trustee to issue from time to time for its lawful purposes debt securities evidencing its unsecured indebtedness.

WHEREAS, the Base Indenture provides that by means of a supplemental indenture, the Company may create one or more series of its debt securities and establish the form and terms and conditions thereof.

WHEREAS, the Company intends by this First Supplemental Indenture to (i) create a series of debt securities to be issued from time to time in an unlimited principal amount entitled “Liberty Property Limited Partnership 4.75% Senior Notes due 2020” (the “Notes”); and (ii) establish the form and the terms and conditions of such Notes.

WHEREAS, the Board of Trustees of Liberty Property Trust (the “Trust”), the general partner of the Company, has approved the creation of the Notes and the form, terms and conditions thereof.

WHEREAS, the consent of Holders to the execution and delivery of this First Supplemental Indenture is not required, and all other actions required to be taken under the Base Indenture with respect to this First Supplemental Indenture have been taken.

NOW, THEREFORE IT IS AGREED:

ARTICLE ONE
Definitions, Creation, Form and Terms and Conditions of the Debt Securities

SECTION 1.01 Definitions. (a) Capitalized terms used in this First Supplemental Indenture and not otherwise defined shall have the meanings ascribed to them in the Base Indenture. In addition, the following additional terms shall have the following meanings to be equally applicable to both the singular and the plural forms of the terms defined:

“Closing Date” means September 27, 2010.

“Global Note” means a single fully-registered global note in book entry form, without coupons, substantially in the form of Exhibit A attached hereto.

“Indenture” means the Base Indenture as supplemented by this First Supplemental Indenture.

“Intercompany Debt” means Debt to which the only parties are the Trust, any of its subsidiaries, the Company and any Subsidiary, or Debt owed to the Trust arising from routine cash management practices, but only so long as such Debt is held solely by any of the Trust, any of its subsidiaries, the Company and any Subsidiary.

“Subsidiary” shall have the meaning provided in the Base Indenture and shall include Liberty Property Development Corp, Liberty Property Development Corp.-II and Liberty UK Development Corp.

(b) The following term, which is defined in the Base Indenture, is amended and restated as follows:

“Reinvestment Rate” means the yield on Treasury securities at a constant maturity corresponding to the remaining life (as of the date of redemption, and rounded to the nearest month) to Stated Maturity of the principal being redeemed (the “Treasury Yield”), plus 0.35%. For purposes hereof, the Treasury Yield shall be equal to the arithmetic mean of the yields published in the Statistical Release under the heading “Week Ending” for “U.S. Government Securities — Treasury Constant Maturities” with a maturity equal to such remaining life; provided, that if no published maturity exactly corresponds to such remaining life, then the Treasury Yield shall be interpolated or extrapolated on a straight-line basis from the arithmetic means of the yields for the next shortest and next longest published maturities. For purposes of calculating the Reinvestment Rate, the most recent Statistical Release published prior to the date of determination of the Make-Whole Amount shall be used. If the format or content of the Statistical Release changes in a manner that precludes determination of the Treasury Yield in the above manner, then the Treasury Yield shall be determined in the manner that most closely approximates the above manner, as reasonably determined by the Company.

SECTION 1.02 Creation of the Debt Securities. In accordance with Section 301 of the Base Indenture, the Company hereby creates the Notes as a separate series of its debt securities issued pursuant to the Indenture. The Notes shall be issued in an aggregate principal amount initially limited to $350,000,000.

The Company may issue, in addition to the Notes originally issued on the Closing Date, additional Notes. The Notes originally issued on the Closing Date and any additional Notes originally issued subsequent to the Closing Date shall be a single series for all purposes under the Indenture.

SECTION 1.03 Form of the Debt Securities. The Notes will be represented by one or more fully-registered global notes in book-entry form, without coupons, registered in the name of the nominee of DTC. The Notes shall be in the form of Exhibit A attached hereto and the terms set forth in such form shall be incorporated herein. So long as DTC, or its nominee, is the registered owner of a Global Note, DTC or its nominee, as the case may be, will be considered the sole owner or holder of the Notes represented by such Global Note for all purposes under the Indenture. Ownership of beneficial interests in the Global Note will be shown on, and transfers thereof will be effected only through, records maintained by DTC (with respect to beneficial interests of participants) or by participants or persons that hold interests through participants (with respect to beneficial interests of beneficial owners).

2

SECTION 1.04 Terms and Conditions of the Debt Securities. The Notes shall be governed by all the terms and conditions of the Base Indenture, as supplemented by this First Supplemental Indenture, and in particular, the following provisions shall be the terms of the Notes:

(a) Optional Redemption. At any time prior to July 1, 2020, the Issuer may redeem the Notes at its option, in whole or from time to time in part, at a redemption price equal to the Redemption Price.

At any time on or after July 1, 2020, the Notes will be redeemable at the option of the Issuer, in whole or from time to time in part, at a redemption price equal to 100% of the principal amount of the Notes to be redeemed plus accrued interest thereon to the Redemption Date.

If notice of redemption has been given as provided in the Indenture and funds for the redemption of the Notes called for redemption shall have been made available on the Redemption Date referred to in such notice, such Notes will cease to bear interest on the date fixed for such redemption specified in such notice and the only right of the Holders of such Notes from and after the Redemption Date will be to receive payment of the Redemption Price upon surrender of such Notes in accordance with such notice.

Notice of any optional redemption of any Notes will be given to Holders at their addresses, as shown in the Security Register for the Notes, not less than 30 days nor more than 60 days prior to the date fixed for redemption. The notice of redemption will specify, among other items, the Redemption Price and the principal amount of the Notes held by such Holder to be redeemed.

If all or less than all of the Notes are to be redeemed at the option of the Issuer, the Issuer will notify the Trustee at least 45 days prior to giving notice of redemption (or such shorter period as is satisfactory to the Trustee) of the aggregate principal amount of Notes to be redeemed and their Redemption Date. The Issuer shall give the Trustee notice of the Make-Whole Amount promptly after the calculation thereof and if the Issuer has requested that the Trustee give to the Holders the notice of redemption required by Section 1104 of the Base Indenture, such notice from the Issuer shall be given to the Trustee at such time as shall permit the Trustee to include notice of the Make-Whole Amount in such notice of redemption. The Trustee shall have no responsibility for calculating the Make-Whole Amount. The Trustee shall select, in such manner as it shall deem fair and appropriate, no less than 60 days prior to the date of redemption, the Notes to be redeemed in part.

Neither the Issuer nor the Trustee shall be required to: (i) issue, register the transfer of or exchange Notes during a period beginning at the opening of business 15 days before any selection of Notes to be redeemed and ending at the close of business on the day of mailing the relevant notice of redemption; or (ii) register the transfer of or exchange any Note, or portion thereof, called for redemption, except the unredeemed portion of any Note being redeemed in part.

3

(b) Maturity; Payment of Principal and Interest. The principal amount of the Notes shall be payable on October 1, 2020, subject to the provisions of the Indenture and the Notes. Interest will accrue from September 27, 2010. The Notes will bear interest at 4.75% per annum, payable semi-annually in arrears on April 1 and October 1 of each year, beginning on April 1, 2011. Principal and interest payments on interests represented by a Global Note will be made to DTC or its nominee, as the case may be, as the registered owner of such Global Note. All payments of principal and interest in respect of the Global Note will be made by the Issuer in immediately available funds. The principal of the Notes payable on the Maturity Date or upon redemption will be paid against presentation and surrender of the Notes at the corporate trust office of the Trustee at 60 Livingston Avenue, 1^st Floor, Bond Drop Window, St. Paul, MN, 55107, in such coin or currency of the United States of America as at the time of payment is legal tender for payment of public or private debt.

(c) Applicability of Defeasance or Covenant Defeasance. The provisions of Article 14 of the Base Indenture shall apply to the Notes.

ARTICLE TWO
Additional Covenants

The Notes shall be governed by all the covenants contained in the Base Indenture, as supplemented by this First Supplemental Indenture. In addition, this First Supplemental Indenture amends and restates Section 1004 of the Base Indenture to read as follows:

“SECTION 1004. Limitations on Incurrence of Debt.

(a) The Company will not, and will not permit any Subsidiary to, incur any Debt, other than Intercompany Debt, that is subordinate in right of payment to the Notes, if, immediately after giving effect to the incurrence of such Debt and the application of the proceeds thereof, the aggregate principal amount of all outstanding Debt of the Company and its Subsidiaries on a consolidated basis determined in accordance with GAAP is greater than 60% of the sum of: (i) the Company’s Adjusted Total Assets as of the end of the most recent fiscal quarter prior to the incurrence of such additional Debt; and (ii) the increase in Adjusted Total Assets since the end of such quarter (including any increase resulting from the incurrence of additional Debt).

(b) The Company will not, and will not permit any Subsidiary to, incur any Debt if the ratio of Consolidated Income Available for Debt Service to the Annual Service Charge on the date on which such additional Debt is to be incurred, on a pro forma basis, after giving effect to the incurrence of such Debt and to the application of the proceeds thereof would have been less than 1.5 to 1.

(c) The Company will not, and will not permit any Subsidiary to, incur any Debt secured by any mortgage, lien, charge, pledge, encumbrance or security interest of any kind upon any of the properties of the Company or any Subsidiary (“Secured Debt”), whether owned at the date hereof or hereafter acquired, if, immediately after giving effect to the incurrence of such Secured Debt and the application of the proceeds thereof, the aggregate principal amount of all outstanding Secured Debt of the Company and its Subsidiaries on a consolidated basis is greater than 40% of the sum of: (i) the Company’s Adjusted Total Assets as of the end of the most recent fiscal quarter prior to the incurrence of such additional Debt; and (ii) the increase in Adjusted Total Assets since the end of such quarter (including any increase resulting from the incurrence of additional Debt).

4

(d) The Company will at all time maintain an Unencumbered Total Asset Value in an amount not less than 150% of the aggregate principal amount of all outstanding unsecured Debt of the Company and its Subsidiaries on a consolidated basis.

For purposes of the foregoing provisions regarding the limitation on the incurrence of Debt, Debt shall be deemed to be “incurred” by the Company or a Subsidiary whenever the Company or such Subsidiary shall create, assume, guarantee or otherwise become liable in respect thereof.

ARTICLE THREE
Trustee

SECTION 3.01 Trustee. The Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this First Supplemental Indenture or the due execution thereof by the Company. The recitals of fact contained herein shall be taken as the statements solely of the Company, and the Trustee assumes no responsibility for the correctness thereof.

ARTICLE FOUR
Miscellaneous Provisions

SECTION 4.01 Ratification of Original Indenture. This First Supplemental Indenture is executed and shall be construed as an indenture supplemental to the Base Indenture, and as supplemented and modified hereby, the Base Indenture is in all respects ratified and confirmed, and the Base Indenture and this First Supplemental Indenture shall be read, taken and construed as one and the same instrument.

SECTION 4.02 Effect of Headings. The Article and Section headings herein are for convenience only and shall not affect the construction hereof.

SECTION 4.03 Successors and Assigns. All covenants and agreements in this First Supplemental Indenture by the Company shall bind its successors and assigns, whether so expressed or not.

SECTION 4.04 Separability Clause. In case any one or more of the provisions contained in this First Supplemental Indenture shall for any reason be held to be invalid, illegal or unenforceable in any respect, the validity, legality and enforceability of the remaining provisions shall not in any way be affected or impaired thereby.

5

SECTION 4.05 Governing Law. This First Supplemental Indenture shall be governed by and construed in accordance with the laws of the State of New York. This First Supplemental Indenture is subject to the provisions of the Trust Indenture Act, that are required to be part of this First Supplemental Indenture and shall, to the extent applicable, be governed by such provisions.

SECTION 4.06 Counterparts. This First Supplemental Indenture may be executed in any number of counterparts, and each of such counterparts shall for all purposes be deemed to be an original, but all such counterparts shall together constitute one and the same instrument.

6

IN WITNESS WHEREOF, the parties hereto have caused this First Supplemental Indenture to be duly executed, and their respective corporate seals to be hereunto affixed and attested, all as of the date first above written.

LIBERTY PROPERTY LIMITED PARTNERSHIP
By:	Liberty Property Trust,
	as its sole General Partner
By:	/s/ William P. Hankowsky
	Name:	William P. Hankowsky
	Title:	President and Chief Executive Officer

Attest:

/s/ James J. Bowes
Name:	James J. Bowes
Title:	Secretary, General Counsel

Supplemental Indenture

U.S. BANK NATIONAL ASSOCIATION, as Trustee
By:	/s/ George J. Rayzis
	Name:	George J. Rayzis
	Title:	Vice President

Attest:

/s/ Ralph E. Jones
Name:	Ralph E. Jones
Title:	Vice President

Supplemental Indenture

Exhibit A

[FACE OF NOTE]

THIS NOTE IS A GLOBAL SECURITY WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO. UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION (“DTC”), TO THE ISSUER OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC AND ANY PAYMENT IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC, ANY TRANSFER, PLEDGE, OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

UNLESS AND UNTIL THIS CERTIFICATE IS EXCHANGED IN WHOLE OR IN PART FOR NOTES IN CERTIFICATED FORM, THIS CERTIFICATE MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY DTC TO A NOMINEE THEREOF OR BY A NOMINEE THEREOF TO DTC OR ANOTHER NOMINEE OF DTC OR BY DTC OR ANY SUCH NOMINEE TO A SUCCESSOR OF DTC OR A NOMINEE OF SUCH SUCCESSOR.

REGISTERED	REGISTERED
NO. 1	PRINCIPAL AMOUNT
CUSIP NO. 53117C AM4		$350,000,000

LIBERTY PROPERTY LIMITED PARTNERSHIP

4.75% Senior Note due 2020

September 27, 2010

Liberty Property Limited Partnership, a Pennsylvania limited partnership (the “Issuer,” which term includes any successor under the Indenture hereinafter referred to), for value received, hereby promises to pay to Cede & Co. or its registered assigns, the principal sum of Three Hundred and Fifty Million Dollars ($350,000,000) on October 1, 2020 (the “Maturity Date”), and to pay interest thereon from September 27, 2010 (or from the most recent interest payment date to which interest has been paid or duly provided for), semi-annually in arrears on April 1 and October 1 of each year (each, an “Interest Payment Date”), commencing on April 1, 2011, and on the Maturity Date, at the rate of 4.75% per annum, until payment of said principal sum has been made or duly provided for.

The interest so payable and punctually paid or duly provided for on any Interest Payment Date and on the Maturity Date will be paid to the Person in whose name this Note (or one or more Predecessor Securities) is registered at the close of business on the “Record Date” for such payment, which will be the 15th day (regardless of whether such day is a Business Day (as defined below)) of the month preceding such Interest Payment Date or the Maturity Date, as the case may be. Any interest not so punctually paid or duly provided for shall forthwith cease to be payable to the Holder on such record date, and shall be paid to the Person in whose name this Note (or one or more Predecessor Securities) is registered at the close of business on a subsequent record date for the payment of such defaulted interest (which shall be not more than 15 days and not less than 10 days prior to the date of the payment of such defaulted interest) established by notice given by mail by or on behalf of the Issuer to the Holders of the Securities of this series not less than 10 days preceding such subsequent record date. Interest on this Note will be computed on the basis of a 360-day year of twelve 30-day months.

The principal of this Note payable on the Maturity Date or upon redemption will be paid against presentation and surrender of this Note at the corporate trust office of the Trustee at 60 Livingston Avenue, 1^st Floor, Bond Drop Window, St. Paul, MN, 55107, in such coin or currency of the United States of America as at the time of payment is legal tender for payment of public or private debt.

Interest payable on this Note on any Interest Payment Date and on the Maturity Date, as the case may be, will be the amount of interest accrued from and including the immediately preceding Interest Payment Date (or from and including September 27, 2010, in the case of the initial Interest Payment Date) to but excluding the applicable Interest Payment Date or the Maturity Date, as the case may be. If any Interest Payment Date, Redemption Date or the Maturity Date falls on a day that is not a Business Day (as defined below), the required payment of interest or principal or both, as the case may be, will be made on the next Business Day with the same force and effect as if it were made on the date such payment was due and no interest will accrue on the amount so payable for the period from and after such Interest Payment Date, Redemption Date or the Maturity Date, as the case may be. “Business Day” means any day, other than a Saturday or a Sunday, that is neither a legal holiday nor a day on which banking institutions in Chicago or the City of New York are authorized or required by law, regulation or executive order to close.

Payments of principal and interest in respect of this Note will be made by wire transfer of immediately available funds in such coin or currency of the United States of America as at the time of payment is legal tender for the payment of public and private debts.

Reference is made to the further provisions of this Note set forth on the reverse hereof. Such further provisions shall for all purposes have the same effect as though fully set forth at this place.

This Note shall not be entitled to the benefits of the Indenture referred to on the reverse hereof or be valid or become obligatory for any purpose until the certificate of authentication hereon shall have been signed by the Trustee under such Indenture.

IN WITNESS WHEREOF, the Issuer has caused this instrument to be signed manually or by facsimile by its authorized officers as of the date first set forth above.

LIBERTY PROPERTY LIMITED PARTNERSHIP,     as Issuer
By:	LIBERTY PROPERTY TRUST,
	as its sole General Partner
By:
	Name:
	Title:
By:
	Name:
	Title:

Signature Page to Note

TRUSTEE’S CERTIFICATE OF AUTHENTICATION

This is one of the Securities of the series designated herein referred to in the within-mentioned Indenture.

U.S. BANK NATIONAL ASSOCIATION, as Trustee
By:
	Authorized Signatory

A-7

[REVERSE OF NOTE]

LIBERTY PROPERTY LIMITED PARTNERSHIP

4.75% Senior Note due 2020

This Security is one of a duly authorized issue of debentures, notes, bonds, or other evidences of indebtedness of the Issuer (hereinafter called the “Securities”) of the series hereinafter specified, all issued or to be issued under and pursuant to an Indenture dated as of September 22, 2010 (herein called the “Indenture”), duly executed and delivered by the Issuer to U.S. Bank National Association, as Trustee (herein called the “Trustee,” which term includes any successor trustee under the Indenture with respect to the series of Securities of which this Note is a part), to which Indenture and all indentures supplemental thereto relating to this security reference is hereby made for a description of the rights, limitations of rights, obligations, duties, and immunities thereunder of the Trustee, the Issuer, and the Holders of the Securities, and of the terms upon which the Securities are, and are to be, authenticated and delivered. The Securities may be issued in one or more series, which different series may be issued in various aggregate principal amounts, may mature at different times, may bear interest (if any) at different rates, may be subject to different redemption provisions (if any), and may otherwise vary as provided in the Indenture or any indenture supplemental thereto. This Security is one of a series designated as the 4.75% Notes due 2020 of the Issuer.

In case an Event of Default with respect to this Security shall have occurred and be continuing, the principal hereof and Make Whole Amount, if any, may be declared, and upon such declaration shall become, due and payable, in the manner, with the effect, and subject to the conditions provided in the Indenture.

The Issuer may redeem this Security at any time at the option of the Issuer, in whole or from time to time in part, at a redemption price equal to the sum of (i) the principal amount of this Security being redeemed plus accrued interest thereon to the Redemption Date and (ii) the Make-Whole Amount, if any, with respect to this Security. Notice of any optional redemption of any Securities of this series will be given to Holders thereof at their addresses, as shown in the Security Register for the Securities of this series, not more than 60 nor less than 30 days prior to the date fixed for redemption. The notice of redemption will specify, among other items, the Redemption Price and the principal amount of the Securities of this series held by such Holder to be redeemed.

The Indenture contains provisions permitting the Issuer and the Trustee, with the consent of the Holders of not less than a majority of the aggregate principal amount of all Outstanding Securities affected, evidenced as provided in the Indenture, to execute supplemental indentures adding any provisions to or changing in any manner or eliminating any of the provisions of the Indenture or of any supplemental indenture or modifying in any manner the rights of the Holders of the Securities of each series; provided, however, that no such supplemental indenture shall, without the consent of the Holder of each Security so affected, (i) change the Stated Maturity of the principal of (or premium or Make-Whole Amount, if any, on) or any installment of interest on, any such Security, (ii) reduce the principal amount of, or the rate or amount of interest on, or any premium payable on redemption of the Notes,

A-8

or adversely affect any right of repayment of the Holder of any Securities; (iii) change the place of payment, or the coin or currency, for payment of principal or premium, if any, or interest on the Securities; (iv) impair the right to institute suit for the enforcement of any payment on or with respect to the Securities on or after the stated maturity of any such Security; (v) reduce the above-stated percentage in principal amount of outstanding Securities, the extent of whose Holders is necessary to modify or amend the Indenture, for any waiver with respect to the Securities or to waive compliance with certain provisions of the Indenture or certain defaults and consequences thereunder or to reduce the quorum or voting requirements set forth in the Indenture; or (vi) modify any of the foregoing provisions or any of the provisions relating to the waiver of certain past defaults or certain covenants, except to increase the required percentage to effect such action or to provide that certain other provisions of the Indenture may not be modified or waived without the consent of the Holder of each Security. It is also provided in the Indenture that, with respect to certain defaults or Events of Default regarding the Securities of any series, the Holders of a majority in principal amount outstanding of the Securities of such series may on behalf of the Holders of all the Securities of such series waive any such past default or Event of Default and its consequences, or, subject to certain conditions, may rescind a declaration of acceleration and its consequences with respect to such Securities. Any such consent or waiver by the Holder of this Security (unless revoked as provided in the Indenture) shall be conclusive and binding upon such Holder and upon all future Holders and owners of this Security and any Securities that may be issued in exchange or substitution herefor, irrespective of whether or not any notation thereof is made upon this security or such other securities.

No reference herein to the Indenture and no provision of this security or of the Indenture shall alter or impair the obligation of the Issuer, which is absolute and unconditional, to pay the principal of and any Make-Whole Amount and interest on this Security in the manner, at the respective times, at the rate and in the coin or currency herein prescribed.

This Security is issuable only in registered form without coupons in denominations of $2,000 and integral multiples of $1,000 in excess thereof. Securities may be exchanged for a like aggregate principal amount of Securities of this series of other authorized denominations at the office or agency of the Issuer in The Borough of Manhattan, The City of New York, in the manner and subject to the limitations provided in the Indenture, but without the payment of any service charge except for any tax or other governmental charge imposed in connection therewith.

Upon due presentment for registration of transfer of Securities at the office or agency of the Issuer in The Borough of Manhattan, The City of New York, one or more new Securities of the same series of authorized denominations in an equal aggregate principal amount will be issued to the transferee in exchange therefor, subject to the limitations provided in the Indenture, without charge except for any tax or other governmental charge imposed in connection therewith.

A-9

Prior to due presentment of this Security for registration of transfer, the Issuer, the Trustee or any agent of the Issuer or the Trustee may deem and treat the Person in whose name this Security is registered as the owner of this Security (whether or not this security shall be overdue and notwithstanding any notation of ownership or other writing hereon), for the purpose of receiving payment of, or on account of, the principal hereof and Make-Whole Amount, if any, and subject to the provisions on the face hereof, interest hereon, and for all other purposes, and neither the Issuer nor the Trustee nor any authorized agent of the Issuer or the Trustee shall be affected by any notice to the contrary.

The Indenture and each Security shall be governed by and construed in accordance with the laws of the State of New York.

Capitalized terms used herein which are not otherwise defined shall have the respective meanings assigned to them in the Indenture and all indentures supplemental thereto relating to this Security.

A-10

LIBERTY PROPERTY LIMITED PARTNERSHIP

ISSUER

TO

U.S. BANK NATIONAL ASSOCIATION,
TRUSTEE

FIRST SUPPLEMENTAL INDENTURE
DATED AS OF SEPTEMBER 27, 2010

4.75% SENIOR NOTES DUE 2020

SUPPLEMENT TO INDENTURE,
DATED AS OF SEPTEMBER 22, 2010, BETWEEN
LIBERTY PROPERTY LIMITED PARTNERSHIP AND
U.S. BANK NATIONAL ASSOCIATION

EX-12

Exhibit 12.1

EXHIBIT 12 — STATEMENT RE: COMPUTATION OF RATIO
OF EARNINGS TO FIXED CHARGES
AND RATIO OF EARNINGS TO COMBINED FIXED CHARGES

LIBERTY PROPERTY TRUST / LIBERTY PROPERTY LIMITED PARTNERSHIP
(Amounts in thousands except ratio amounts)

	Year ended December 31,
	2010		2009		2008		2007		2006
Earnings before fixed charges:
Income before allocation of minority interest and income from investments in unconsolidated subsidiaries (1)	$	144,401	$	149,937	$	146,643	$	142,859	$	155,300
Add: Interest expense		142,819		143,723		147,743		119,597		102,143
Depreciation expense on cap’d interest		1,678		1,607		1,245		5,393		4,437
Amortization of deferred financing costs		6,501		5,179		4,441		3,978		3,770
Earnings before fixed charges	$	295,399	$	300,446	$	300,072	$	271,827	$	265,650
Fixed charges:
Interest expense	$	142,819	$	143,723	$	147,743	$	119,597	$	102,143
Amortization of deferred financing charges		6,501		5,179		4,441		3,978		3,770
Capitalized interest		929		7,640		19,958		45,697		30,837
Fixed charges		150,249		156,542		172,142		169,272		136,750
Preferred share distributions		—		—		—		—		—
Preferred unit distributions		21,012		21,012		21,012		17,126		13,691
Combined fixed charges	$	171,261	$	177,554	$	193,154	$	186,398	$	150,441
Ratio of earnings to fixed charges		1.97		1.92		1.74		1.61		1.94
Ratio of earnings to combined fixed charges		1.72		1.69		1.55		1.46		1.77

(1) Amounts for the years ended December 31, 2010, 2009, 2008, 2007 and 2006 have been reclassified to present properties that have been sold during 2010. As a result, operations have been reclassified to discontinued operations from continuing operations for all periods presented.

EX-21

Exhibit 21

Liberty Property Trust
Liberty Property Limited Partnership
Liberty Lehigh Partnership
Liberty Property Philadelphia Limited Partnership
Liberty Property Philadelphia Limited Partnership II
Liberty Property Philadelphia Corporation
Liberty Property Philadelphia Trust
Liberty/Commerz 1701 JFK Boulevard, L.P.
Liberty Property Philadelphia Limited Partnership IV West
Liberty Property Philadelphia Corporation IV East
Liberty Property Philadelphia Corporation IV West
Liberty Property Philadelphia Corporation V
Liberty Property Philadelphia Limited Partnership V
Liberty Property Philadelphia Limited Partnership VI
Liberty Property Philadelphia Trust VI
Liberty Property Development Corp.
Liberty Property Development Corp. II
Liberty Special Purpose Trust
LP Malvern Limited Partnership
LP Malvern LLC
Land Holdings Realty LLC
Rivers Business Commons Associates Limited Partnership
Liberty Property Philadelphia Navy Yard Limited Partnership
Liberty Property Philadelphia Navy Yard Corporation
Liberty Property/Synterra Limited Partnership
Liberty Venture I, LP
Liberty Venture I, LLC
Liberty Illinois, LP
Liberty Illinois Venture, LLC
L/S One Crescent Drive, LP
L/S One Crescent Drive, LLC
L/S Three Crescent Drive, LP
L/S Three Crescent Drive, LLC
L/S 4775 League Island Blvd., LP
L/S 4775 League Island Blvd., LLC
L/S 26^th Street North, LP
L/S 26^th Street North, LLC
L/S 26^th Street South, LP
L/S 26^th Street South, LLC
Liberty West Allis, LLC
Liberty Deer Park, LLC
Liberty Delaware, LLC
Liberty Cotton Center, LLC
Liberty Cotton Center II, LLC
Liberty Property Lux, LLC
Annapolis Development, LLC

9755 Patuxent Woods Drive Trust
Perryman 159, L.L.C.
Liberty Stoneridge, LLC
Liberty Durham, LLC
Liberty 600 Industrial, G.P.
Liberty AIPO Limited Partnership
Liberty Washington, LP
Liberty Washington Venture, LLC
Republic 20^th Street LLC
Republic Property TRS LLC
Republic Park LLC
RKB CP IV LLC
RKB Lakeside Manager LLC
RKB Lakeside LLC
RKB Corporate Oaks LLC
RPT Presidents Park LLC
Presidents Park I LLC
Presidents Park II LLC
Presidents Park III LLC
RKB Pender LLC
RPLP I LLC
RPT 1425 Investors LP
RPT 1425 Holdings LLC
RPT 1425 New York Avenue LLC
RKB WillowWood Manager LLC
RKB WillowWood LLC
RPB WillowWood I LLC
RPB WillowWood II LLC
Silversword Properties Limited
Cambridge Medipark Limited
Liberty Property Trust UK Limited
Kings Hill Estate Management Company Limited
Rouse Kent (Residential) Limited
Rouse Kent Developments Limited
Rouse Kent (Central) Limited
Rouse Kent (1 Tower View) Limited
Kings Hill Property Management Limited
Kings Hill Residential Estate Management Company Limited
iCO Didsbury Limited
Kings Hill Unit Trust
Liberty Property Trust Lux Sarl
Blythe Valley JV Sarl
BVP I Sarl
BVP II Sarl
Blythe Valley Innovation Centre Ltd.
BVP Management Co. Ltd.
CBC Estate Management Limited
Kings Hill Sports Management Limited

EX-23.1

Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the following Registration Statements:

1)	Registration Statement (Form S-3 No. 333-120692),
2)	Registration Statement (Form S-3 No. 333-150737),
3)	Registration Statement (Form S-3 No. 33-94782),
4)	Registration Statement (Form S-3 No. 333-22211),
5)	Registration Statement (Form S-3 No. 333-43267),
6)	Registration Statement (Form S-3 No. 333-39282) ,
7)	Registration Statement (Form S-3 No. 333-65592), and
8)	Registration Statement (Form S-3 No. 333-125571) of Liberty Property Trust and Liberty Property Limited Partnership,
9)	Registration Statement (Form S-3 No. 333-156460),
10)	Registration Statement (Form S-3 No. 333-148614),
11)	Registration Statement (Form S-3 No. 333-14139),
12)	Registration Statement (Form S-3 No. 333-53297),
13)	Registration Statement (Form S-3 No. 333-63115),
14)	Registration Statement (Form S-3 No. 333-37218),
15)	Registration Statement (Form S-3 No. 333-45032),
16)	Registration Statement (Form S-3 No. 333-63494),
17)	Registration Statement (Form S-3 No. 333-63978),
18)	Registration Statement (Form S-3 No. 333-91702),
19)	Registration Statement (Form S-3 No. 333-107482),
20)	Registration Statement (Form S-3 No. 333-108040),
21)	Registration Statement (Form S-3 No. 333-114609),
22)	Registration Statement (Form S-3 No. 333-118994),
23)	Registration Statement (Form S-3 No. 333-130948),
24)	Registration Statement (Form S-3 No. 333-125572),
25)	Registration Statement (Form S-3 No. 333-122365),
26)	Registration Statement (Form S-3 No. 333-159731),
27)	Registration Statement (Form S-3 No. 333-163572)
28)	Registration Statement (Form S-8 No. 333-141314) pertaining to the Liberty Property Trust Amended and Restated Share Incentive Plan,
29)	Registration Statement (Form S-8 No. 333-32244) pertaining to the Liberty Property Trust Amended and Restated Share Incentive Plan,
30)	Registration Statement (Form S-8 No. 333-62504) pertaining to the Liberty Property Trust Amended and Restated Share Incentive Plan,
31)	Registration Statement (Form S-8 No. 333-62506) pertaining to the Liberty Property Trust Amended and Restated Share Incentive Plan,
32)	Registration Statement (Form S-8 No. 333-118995) pertaining to the Liberty Property Trust Amended and Restated Share Incentive Plan, and
33)	Registration Statement (Form S-8 No. 333-159732) pertaining to the Liberty Property Trust Amended and Restated Share Incentive Plan, and in the related Prospectuses

of our reports dated February 25, 2011, with respect to the consolidated financial statements and schedule of Liberty Property Trust, and the effectiveness of internal control over financial reporting of Liberty Property Trust, included in this Annual Report (Form 10-K) for the year ended December 31, 2010.

/s/ Ernst &Young LLP

Philadelphia, Pennsylvania
February 25, 2011

EX-23.2

Exhibit 23.2

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the following Registration Statements:

1)	Registration Statement (Form S-3 No. 333-120692),
2)	Registration Statement (Form S-3 No. 333-150737),
3)	Registration Statement (Form S-3 No. 33-94782),
4)	Registration Statement (Form S-3 No. 333-22211),
5)	Registration Statement (Form S-3 No. 333-43267),
6)	Registration Statement (Form S-3 No. 333-39282),
7)	Registration Statement (Form S-3 No. 333-65592), and
8)	Registration Statement (Form S-3 No. 333-125571)

of Liberty Property Trust and Liberty Property Limited Partnership and in the related Prospectuses of our reports dated February 25, 2011, with respect to the consolidated financial statements and schedule of Liberty Property Limited Partnership, and the effectiveness of internal control over financial reporting of Liberty Property Limited Partnership, included in this Annual Report (Form 10-K) for the year ended December 31, 2010.

/s/ Ernst & Young LLP

Philadelphia, Pennsylvania
February 25, 2011

EX-31.1

Exhibit 31.1

LIBERTY PROPERTY TRUST

CERTIFICATIONS REQUIRED BY
RULE 13a-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934

I, William P. Hankowsky, certify that:

1. I have reviewed this Form 10-K of Liberty Property Trust;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting,

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: February 25, 2011	By:	/s/ WILLIAM P. HANKOWSKY
		William P. Hankowsky
		Chairman, President and Chief Executive Officer

EX-31.2

Exhibit 31.2

LIBERTY PROPERTY TRUST

CERTIFICATIONS REQUIRED BY
RULE 13a-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934

I, George J. Alburger, Jr., certify that:

1. I have reviewed this Form 10-K of Liberty Property Trust;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting,

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: February 25, 2011	By:	/s/ GEORGE J. ALBURGER, JR.
		George J. Alburger, Jr.
		Executive Vice President and Chief Financial Officer

EX-31.3

Exhibit 31.3

LIBERTY PROPERTY LIMITED PARTNERSHIP

CERTIFICATIONS REQUIRED BY
RULE 13a-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934

I, William P. Hankowsky, certify that:

1. I have reviewed this Form 10-K of Liberty Property Limited Partnership;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting,

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: February 25, 2011	By:	/s/ WILLIAM P. HANKOWSKY
		William P. Hankowsky
		Chairman, President and Chief Executive Officer of Liberty Property Trust, the Registrant’s sole general partner

EX-31.4

Exhibit 31.4

LIBERTY PROPERTY LIMITED PARTNERSHIP

CERTIFICATIONS REQUIRED BY
RULE 13a-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934

I, George J. Alburger, Jr., certify that:

1. I have reviewed this Form 10-K of Liberty Property Limited Partnership;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting,

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: February 25, 2011	By:	/s/ GEORGE J. ALBURGER, JR.
		George J. Alburger, Jr.
		Executive Vice President and Chief Financial Officer of Liberty Property Trust, the Registrant’s sole general partner

EX-32.1

Exhibit 32.1

LIBERTY PROPERTY TRUST

CERTIFICATIONS REQUIRED BY
RULE 13a-14(b) UNDER THE SECURITIES EXCHANGE ACT OF 1934

In connection with the Annual Report of Liberty Property Trust (the “Company”) on Form 10-K for the year ended December 31, 2010 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, WILLIAM P. HANKOWSKY, President and Chief Executive Officer of the Company, certify in connection with Rule 13a-14(b) under the Securities Exchange Act of 1934, as amended, that based on my knowledge:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the Company.

/s/ WILLIAM P. HANKOWSKY William P. Hankowsky

Chairman, President and Chief Executive Officer

Date: February 25, 2011

EX-32.2

Exhibit 32.2

LIBERTY PROPERTY TRUST

CERTIFICATIONS REQUIRED BY
RULE 13a-14(b) UNDER THE SECURITIES EXCHANGE ACT OF 1934

In connection with the Annual Report of Liberty Property Trust (the “Company”) on Form 10-K for the year ended December 31, 2010, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, GEORGE J. ALBURGER, JR., Executive Vice President and Chief Financial Officer of the Company, certify in connection with Rule 13a-14(b) under the Securities Exchange Act of 1934, as amended, that based on my knowledge:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the Company.

/s/ GEORGE J. ALBURGER, JR. George J. Alburger, Jr.

Executive Vice President and Chief Financial Officer

Date: February 25, 2011

EX-32.3

Exhibit 32.3

LIBERTY PROPERTY LIMITED PARTNERSHIP

CERTIFICATIONS REQUIRED BY
RULE 13a-14(b) UNDER THE SECURITIES EXCHANGE ACT OF 1934

In connection with the Annual Report of Liberty Property Limited Partnership (the “Company”) on Form 10-K for the year ended December 31, 2010, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, WILLIAM P. HANKOWSKY, President and Chief Executive Officer of Liberty Property Trust (the sole general partner of the Company), certify in connection with Rule 13a-14(b) under the Securities Exchange Act of 1934, as amended, that based on my knowledge:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the Company.

/s/ WILLIAM P. HANKOWSKY William P. Hankowsky

Chairman, President and Chief Executive Officer

of Liberty Property Trust, the Company’s sole general partner

Date: February 25, 2011

EX-32.4

Exhibit 32.4

LIBERTY PROPERTY LIMITED PARTNERSHIP

CERTIFICATIONS REQUIRED BY
RULE 13a-14(b) UNDER THE SECURITIES EXCHANGE ACT OF 1934

In connection with the Annual Report of Liberty Property Limited Partnership (the “Company”) on Form 10-K for the year ended December 31, 2010, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, GEORGE J. ALBURGER, JR., Executive Vice President and Chief Financial Officer of Liberty Property Trust (the sole general partner of the Company), certify in connection with Rule 13a-14(b) under the Securities Exchange Act of 1934, as amended, that based on my knowledge:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the Company.

/s/ GEORGE J. ALBURGER, JR. George J. Alburger, Jr.

Executive Vice President and Chief Financial Officer

of Liberty Property Trust, the Company’s sole general partner

Date: February 25, 2011