10-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

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

For fiscal year ended December 31, 2010

OR

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

COMMISSION FILE NO. 1-6622

WASHINGTON REAL ESTATE INVESTMENT TRUST

(Exact name of registrant as specified in its charter)

MARYLAND	53-0261100
(State of incorporation)	(IRS Employer Identification Number)

6110 EXECUTIVE BOULEVARD, SUITE 800, ROCKVILLE, MARYLAND 20852

(Address of principal executive office) (Zip code)

Registrant’s telephone number, including area code: (301) 984-9400

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

Title of Each Class	Name of exchange on which registered
Shares of Beneficial Interest	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  x    NO  ¨

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.    YES  ¨    NO  x

Indicate by check mark whether the registrant (1) has 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 such shorter period that the registrant was required to file such reports) and (2) has been subject to such filing requirements for the past ninety (90) days.    YES  x    NO  ¨

Indicate by checkmark 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 the registrant was required to submit and post such files).    YES  x    NO  ¨

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of the registrant's 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.    x

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 definition of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	x	Accelerated filer	¨
Non-accelerated filer	¨	Smaller reporting company	¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).    YES  ¨    NO  x

As of June 30, 2010, the aggregate market value of such shares held by non-affiliates of the registrant was approximately $1,710,524,544 (based on the closing price of the stock on June 30, 2010).

As of February 18, 2011, 65,895,876 common shares were outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of our definitive Proxy Statement relating to the 2011 Annual Meeting of Shareholders, to be filed with the Securities and Exchange Commission, are incorporated by reference in Part III, Items 10-14 of this Annual Report on Form 10-K as indicated herein.

WASHINGTON REAL ESTATE INVESTMENT TRUST

2010 FORM 10-K ANNUAL REPORT

INDEX

PART I			Page
	Item 1.	Business		3
	Item 1A.	Risk Factors		7
	Item 1B.	Unresolved Staff Comments		14
	Item 2.	Properties		15
	Item 3.	Legal Proceedings		17
	Item 4.	(Removed and Reserved)		17
PART II
	Item 5.	Market for the Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities		18
	Item 6.	Selected Financial Data		19
	Item 7.	Management’s Discussion and Analysis of Financial Condition and Results of Operations		20
	Item 7A.	Qualitative and Quantitative Disclosures about Market Risk		55
	Item 8.	Financial Statements and Supplementary Data		56
	Item 9.	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure		56
	Item 9A.	Controls and Procedures		56
	Item 9B.	Other Information		56
PART III
	Item 10.	Directors, Executive Officers and Corporate Governance		57
	Item 11.	Executive Compensation		57
	Item 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters		57
	Item 13.	Certain Relationships and Related Transactions, and Director Independence		57
	Item 14.	Principal Accountant Fees and Services		57
PART IV
	Item 15.	Exhibits and Financial Statements Schedules		58
		Signatures		64

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PART I

ITEM 1:  BUSINESS

WRIT Overview

Washington Real Estate Investment Trust (“we” or “WRIT”) is a self-administered, self-managed, equity real estate investment trust (“REIT”) successor to a trust organized in 1960. Our business consists of the ownership and operation of income-producing real property in the greater Washington metro region. We own a diversified portfolio of office buildings, medical office buildings, industrial/flex properties, multifamily buildings and retail centers.

Our geographic focus is based on two principles:

1. Real estate is a local business and is more effectively selected and managed by owners located, and with expertise, in the region.

2. Geographic markets deserving of focus must be among the nation’s best markets with a strong primary industry foundation and diversified enough to withstand downturns in their primary industry.

We consider markets to be local if they can be reached from Washington within two hours by car. While we have historically focused most of our investments in the greater Washington metro region, in order to maximize acquisition opportunities we will consider investments within the two-hour radius described above. We also may consider opportunities to duplicate our Washington-focused approach in other geographic markets which meet the criteria described above.

All of our officers and employees live and work in the greater Washington metro region and all but one of our officers have over 20 years of experience in this region.

Over the last five years, dividends paid per share have been $1.73125 for 2010, $1.73 for 2009, $1.72 for 2008, $1.68 for 2007 and $1.64 for 2006.

The Greater Washington Metro Area Economy

In 2010, the Washington metro region’s economy improved significantly from the prior year, with positive job growth and an increase in gross regional product (“GRP”). Current estimates by Delta Associates / Transwestern Commercial Services (“Delta”), a national full service real estate firm that provides market research and evaluation services for commercial property, indicate that the Washington metro region gained 20,000 – 25,000 jobs in 2010, compared to a loss of almost 53,000 in 2009. The region’s unemployment rate was 6.0% at November 2010, down from 6.1% in the prior year. The region’s unemployment rate remains the lowest rate among all of the nation’s largest metro areas, and is well below the national average of 9.8%. The federal government remains the region’s most important industry, providing approximately one third of the region’s GRP.

Delta expects growth in the Washington metro region to accelerate from recovery to expansion in 2011, albeit slower than in prior recoveries due to a more cautious business community as well as more austere spending policies from the federal government. According to Delta, the Washington Leading Index, which forecasts area economic performance over the next 18 months, is 107.2, as of September 2010, which is above the 20-year average of 102.6. Delta also forecasts GRP for the Washington metro region to increase by 3.3% - 3.6% in 2010. This compares to a national GRP projection of 3.0% - 3.5%. Delta forecasts job growth in the region to increase in 2011 and 2012, adding 48,100 and 44,000 new jobs, respectively, compared to the 20-year annual average of 37,000.

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Greater Washington Metro Region Real Estate Markets

The Washington metro region’s economy has translated into improving relative real estate market performance in each of our segments, compared to other national metropolitan regions, as reported by Delta. Market statistics and information from Delta are set forth below:

Office and Medical Office Sectors

• Average effective rents decreased 6.5% in 2010 in the region compared to a decrease of 6.9% in 2009.

• Vacancy was 11.9% at year-end 2010, down from 13.0% at year-end 2009 but up from 10.6% at year-end 2008.

• The region has the third lowest vacancy rate of large metro areas in the United States.

• Net absorption (defined as the change in occupied, standing inventory from one period to the next) totaled 6.4 million square feet in 2010, up from 0.6 million square feet in 2009 and equal to the 6.4 million square foot long-term average.

• Of the 5.0 million square feet of office space under construction at year-end 2010 (down from 5.7 million square feet at year-end 2009), 61% is pre-leased compared to 48% one year ago.

Retail Sector

• Rental rates at grocery-anchored centers decreased 2.4% in the region in 2010, compared to the 5.8% decrease in 2009.

• Vacancy rates increased to 5.6% at year-end 2010 from 5.3% at year-end 2009.

• Total retail sales, excluding autos, parts and gas, increased by 5.2% for the twelve months ending October 2010, as compared to a 2.0% decrease in 2009.

Multifamily Sector

• Net effective rents for all investment grade apartments increased 8.2% in the greater Washington metro region during 2010. Class A rents increased by 7.8% in 2010 compared to a decline of 1.7% in 2009.

• The vacancy rate for all apartments was 3.4% at year-end 2010, compared to 4.3% at year-end 2009. The national rate was 6.6% at year-end 2010, which places the Washington metro region as one of the lowest vacancy rates of any metro area in the nation. Class A vacancy increased to 4.6% at year-end 2010 from 3.6% at year-end 2009.

Industrial/Flex Sector

• Rental rates for the industrial sector decreased 3.0% in the Washington metro region in 2010 compared to a decrease of 4.3% in 2009.

• Overall vacancy was 11.0% at year-end 2010, down from 11.4% at year-end 2009.

• Net absorption was a positive 1.2 million square feet, compared to a negative 2.3 million square feet in 2009.

• Of the 1.1 million square feet of industrial space under construction at year-end 2010, 51% was pre-leased, compared to 41% of space under construction that was pre-leased at year-end 2009.

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Our Portfolio

As of December 31, 2010, we owned a diversified portfolio of 85 properties, totaling approximately 10.7 million square feet of commercial space and 2,540 residential units, and land held for development. These 85 properties consist of 25 office properties, 18 medical office properties, 15 retail centers, 11 multifamily properties and 16 industrial/flex properties. Our principal objective is to invest in high quality properties in prime locations, then proactively manage, lease and direct ongoing capital improvement programs to improve their economic performance. The percentage of total real estate rental revenue by property group for 2010, 2009 and 2008, and the percent leased, calculated as the percentage of physical net rentable area leased, as of December 31, 2010, were as follows:

Percent Leased December 31, 2010				Real Estate Rental  Revenue(1)
				2010			2009			2008
	90	%	Office		44	%		44	%		42	%
	90	%	Medical office		15			15			16
	92	%	Retail		14			14			15
	97	%	Multifamily		16			16			14
	80	%	Industrial		11			11			13
					100	%		100	%		100	%

⁽¹⁾ Data excludes discontinued operations.

The industrial segment’s decrease in share of real estate rental revenue from 13% in 2008 to 11% in 2009 and 2010 is primarily due to declines in that segment’s real estate rental revenue caused by lower occupancy.

On a combined basis, our commercial portfolio (i.e., our office, medical office, retail and industrial properties, but not our multifamily properties) was 88% leased at December 31, 2010, 90% leased at December 31, 2009 and 95% leased at December 31, 2008.

The commercial lease expirations for the next five years are as follows:

	# of Leases		Square Feet		Gross Annual Rent		Percentage of Total Gross Annual Rent
2011		293		1,234,000	$	29,374,000		12	%
2012		219		1,225,000		27,861,000		11
2013		216		1,325,000		28,338,000		12
2014		154		1,408,000		37,331,000		15
2015		147		1,167,000		31,833,000		13
2016 and thereafter		332		2,763,000		88,852,000		37
Total		1,361		9,122,000	$	243,589,000		100	%

Total real estate rental revenue from continuing operations was $298.0 million for 2010, $298.2 million for 2009 and $268.7 million for 2008. During the three year period ended December 31, 2010, we acquired three office buildings, two medical office buildings, one multifamily building, one retail center and one industrial/flex property. We also placed into service from development one office building and one multifamily building. During that same time frame, we sold five office buildings, one multifamily building and eight industrial/flex properties. These acquisitions and dispositions were the primary reason for the shifting of each group’s percentage of total real estate rental revenue reflected above.

No single tenant accounted for more than 3.3% of real estate rental revenue in 2010, 3.3% of revenue in 2009 and 3.6% of revenue in 2008. All federal government tenants in the aggregate accounted for approximately 2.6% of our 2010 total revenue. Federal government tenants include the Department of Defense, U.S. Patent and Trademark Office, Federal Bureau of Investigation, Office of Personnel Management, Secret Service, Federal Aviation Administration, NASA and the National Institutes of Health. Our ten largest tenants, in terms of aggregate occupied square feet, are as follows:

1. World Bank;

2. Advisory Board Company;

3. General Services Administration;

4. INOVA Health System;

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5. Patton Boggs LLP;

6. IBM Corporation;

7. Sunrise Senior Living, Inc.;

8. General Dynamics;

9. Children’s National Medical Center;

10. George Washington University.

We expect to continue investing in additional income-producing properties. We invest in properties which we believe will increase in income and value. Our properties typically compete for tenants with other properties throughout the respective areas in which they are located on the basis of location, quality and rental rates.

We make capital improvements on an ongoing basis to our properties for the purpose of maintaining and increasing their value and income. Major improvements and/or renovations to the properties in 2010, 2009, and 2008 are discussed in Item 7, Management’s Discussion and Analysis of Financial Condition and Results of Operations, under the heading “Capital Improvements and Development Costs.”

Further description of the property groups is contained in Item 2, Properties and in Schedule III. Reference is also made to Item 7, Management’s Discussion and Analysis of Financial Condition and Results of Operations.

On February 18, 2011, we had 293 employees including 213 persons engaged in property management functions and 80 persons engaged in corporate, financial, leasing, asset management and other functions.

REIT Tax Status

We believe that we qualify as a REIT under Sections 856-860 of the Internal Revenue Code and intend to continue to qualify as such. To maintain our status as a REIT, we are required to distribute 90% of our ordinary taxable income to our shareholders. When selling properties, we have the option of (a) reinvesting the sales proceeds of properties sold, allowing for a deferral of income taxes on the sale, (b) paying out capital gains to the shareholders with no tax to us or (c) treating the capital gains as having been distributed to our shareholders, paying the tax on the gain deemed distributed and allocating the tax paid as a credit to our shareholders.

Tax Treatment of Recent Disposition Activity

We sold several properties during the three year period ended December 31, 2010:

Disposition Date	Property	Type	Rentable Square Feet (unaudited)		Contract Sales Price (in thousands)		Gain on Sale (in thousands)
June 18, 2010	Parklawn Portfolio(1)	Office/Industrial		229,000	$	23,400	$	7,900
December 21, 2010	The Ridges	Office		104,000		27,500		4,500
December 22, 2010	Ammendale I&II/ Amvax	Industrial		305,000		23,000		9,200
		Total 2010		638,000	$	73,900	$	21,600
May 13, 2009	Avondale	Multifamily		170,000	$	19,800	$	6,700
July 23, 2009	Tech 100 Industrial Park	Industrial		166,000		10,500		4,100
July 31, 2009	Brandywine Center	Office		35,000		3,300		1,000
November 13, 2009	Crossroads Distribution Center	Industrial		85,000		4,400		1,500
		Total 2009		456,000	$	38,000	$	13,300
June 6, 2008	Sullyfield Center/The Earhart Building	Industrial		336,000	$	41,100	$	15,300
		Total 2008		336,000	$	41,100	$	15,300

⁽¹⁾ The Parklawn Portfolio consists of three office properties (Parklawn Plaza, Lexington Building and Saratoga Building) and one industrial property (Charleston Business Center).

All disclosed gains on sale are calculated in accordance with U.S. generally accepted accounting principles (“GAAP”). The capital gains from the sales were paid out to shareholders.

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We distributed all of our 2010, 2009 and 2008 ordinary taxable income to our shareholders. No provision for income taxes was necessary in 2010, 2009 or 2008.

Availability of Reports

Copies of this Annual Report on Form 10-K, as well as our Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and any amendments to such reports are available, free of charge, on the Internet on our website www.writ.com. All required reports are made available on the website as soon as reasonably practicable after they are electronically filed with or furnished to the Securities and Exchange Commission. The reference to our website address does not constitute incorporation by reference of the information contained in the website and such information should not be considered part of this document.

ITEM 1A: RISK FACTORS

Set forth below are the risks that we believe are material to our shareholders. We refer to the shares of beneficial interest in WRIT as our “common shares,” and the investors who own shares as our “shareholders.” This section includes or refers to certain forward-looking statements. You should refer to the explanation of the qualifications and limitations on such forward-looking statements beginning on page 53.

Disruptions in the financial markets could affect our ability to obtain financing or have other adverse effects on us or the market price of our common shares.

The United States and global equity and credit markets have experienced in the recent past significant price volatility and liquidity disruptions which caused the market prices of stocks to fluctuate substantially and the spreads on prospective debt financings to widen considerably. These circumstances significantly negatively impacted liquidity in the financial markets, making terms for certain financings less attractive or unavailable. Any disruption in the equity and credit markets could negatively impact our ability to access additional financing at reasonable terms or at all. If such disruption were to occur, in the event of a debt financing, our cost of borrowing in the future would likely be significantly higher than historical levels. As well, in the case of a common equity financing, the disruptions in the financial markets could have a material adverse effect on the market value of our common shares, potentially requiring us to issue more shares than we would otherwise have issued with a higher market value for our common shares. Disruption in the financial markets also could negatively affect our ability to make acquisitions, undertake new development projects and refinance our debt. In addition, it could also make it more difficult for us to sell properties and could adversely affect the price we receive for properties that we do sell, as prospective buyers experience increased costs of financing and difficulties in obtaining financing.

Disruptions in the financial markets also could adversely affect many of our tenants and their businesses, including their ability to pay rents when due and renew their leases at rates at least as favorable as their current rates. As well, our ability to attract prospective new tenants in the future could be adversely affected by disruption in the financial markets.

Our performance and value are subject to risks associated with our real estate assets and with the real estate industry.

Our economic performance and the value of our real estate assets are subject to the risk that if our office, medical office, retail, multifamily and industrial properties do not generate revenues sufficient to meet our operating expenses, debt service and capital expenditures, our cash flow and ability to pay distributions to our shareholders will be adversely affected. The following factors, among others, may adversely affect the cash flow generated by our commercial and multifamily properties:

• downturns in the national, regional and local economic climate;

• the economic health of our tenants and the ability to collect rents;

• consumer confidence, unemployment rates, and consumer tastes and preferences;

• competition from similar asset type properties;

• local real estate market conditions, such as oversupply or reduction in demand for office, medical office, retail, multifamily and industrial properties;

• changes in interest rates and availability of financing;

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• vacancies, changes in market rental rates and the need to periodically repair, renovate and re-let space;

• increased operating costs, including insurance premiums, utilities and real estate taxes;

• inflation;

• civil disturbances, earthquakes and other natural disasters, terrorist acts or acts of war; and

• decreases in the underlying value of our real estate.

We are dependent upon the economic climate of the Washington metropolitan region.

All of our properties are located in the Washington metropolitan region, which may expose us to a greater amount of market dependent risk than if we were geographically diverse. General economic conditions and local real estate conditions in our geographic region may be dependent upon one or more industries, thus a downturn in one of the industries may have a particularly strong effect. In the event of negative economic changes in our region, we may experience a negative impact to our profitability and may be limited in our ability to make distributions to our shareholders.

We may be adversely affected by any significant reductions in federal government spending.

As a REIT operating exclusively in the Washington, D.C. metropolitan area, a significant portion of our properties is occupied by United States Government tenants or tenants that are directly or indirectly serving the United States Government as federal contractors or otherwise. A significant reduction in federal government spending could affect the ability of these tenants to fulfill lease obligations or decrease the likelihood that they will renew their leases with us. Further, economic conditions in the Washington, D.C. metropolitan area are significantly dependent upon the level of federal government spending in the region. In the event of a significant reduction in federal government spending, there could be negative economic changes in our region which could adversely impact the ability of our tenants to perform their financial obligations under our leases or the likelihood of their lease renewal. As a result, if such a reduction in federal government spending were to occur, we could experience an adverse effect on our financial condition, results of operations, cash flows and ability to make distributions to our shareholders.

We face risks associated with property acquisitions.

We intend to continue to acquire properties which would continue to increase our size and could alter our capital structure. Our acquisition activities and results may be exposed to the following risks:

• we may be unable to finance acquisitions on favorable terms;

• the acquired properties may fail to perform as we expected in analyzing our investments;

• the actual returns realized on acquired properties may not exceed our average cost of capital;

• we may be unable to acquire a desired property because of competition from other real estate investors, including publicly traded real estate investment trusts, institutional investment funds and private investors;

• even if we enter into an acquisition agreement for a property, it is subject to customary conditions to closing, including completion of due diligence investigations which may have findings that are unacceptable;

• even if we enter into an acquisition agreement for a property, we may be unable to complete that acquisition after making a non-refundable deposit and incurring certain other acquisition-related costs;

• we may be unable to quickly and efficiently integrate new acquisitions, particularly acquisitions of portfolios of properties, into our existing operations;

• competition from other real estate investors may significantly increase the purchase price; and

• our estimates of capital expenditures required for an acquired property, including the costs of repositioning or redeveloping, may be inaccurate.

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

• liabilities for clean-up of undisclosed environmental contamination;

• claims by tenants, vendors or other persons dealing with the former owners of the properties;

• liabilities incurred in the ordinary course of business; and

• claims for indemnification by general partners, directors, officers and others indemnified by the former owners of the properties.

Real estate investments are illiquid, and we may not be able to sell our properties on a timely basis when we determine it is appropriate to do so.

Real estate investments can be difficult to sell and convert to cash quickly, especially if market conditions are not favorable, and we may find that to be the case under the current economic conditions due to limited credit availability for potential buyers. Such illiquidity could limit our ability to quickly change our portfolio of properties in response to changes in economic or other conditions. Moreover, under certain circumstances, the Internal Revenue Code imposes penalties on a REIT that sells property held for less than two years and or sells more than a specified number of properties in a given year. In addition, for properties that we acquire by issuing units in an operating partnership, we may be restricted by agreements with the sellers of the properties for a certain period of time from entering into transactions (such as the sale or refinancing of the acquired property) that will result in a taxable gain to the sellers without the sellers’ consent. Due to these factors, we may be unable to sell a property at an advantageous time.

We face potential difficulties or delays renewing leases or re-leasing space.

As of December 31, 2010, leases on our commercial properties will expire from 2011 through 2015 as follows:

	% of leased square footage
2011	12%
2012	11%
2013	12%
2014	15%
2015	13%
Total	63%

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We derive substantially all of our income from rent received from tenants. If our tenants decide not to renew their leases, we may not be able to re-let the space. If tenants decide to renew their leases, the terms of renewals, including the cost of required improvements or concessions, may be less favorable than current lease terms. Multifamily properties are leased under operating leases with terms of generally one year or less. For the years ended 2010, 2009 and 2008, the multifamily tenant retention rate was 61%, 54% and 67%, respectively. Similar to our commercial properties, if our multifamily tenants decide not to renew their leases, we may not be able to re-let the space, or the terms of the renewal may be less favorable than current lease terms. As a result of the foregoing, our cash flow could decrease and our ability to make distributions to our shareholders could be adversely affected.

We face potential adverse effects from major tenants' bankruptcies or insolvencies.

The bankruptcy or insolvency of a major tenant may adversely affect the income produced by a property. We cannot evict a tenant solely because of its bankruptcy. On the other hand, a court might authorize the tenant to reject and terminate its lease. In such case, our claim against the bankrupt tenant for unpaid, future rent would be subject to a statutory cap that might be substantially less than the remaining rent actually owed under the lease. As a result, our claim for unpaid rent would likely not be paid in full. This shortfall could adversely affect our cash flow and results from operations. If a tenant experiences a downturn in its business or other types of financial distress, it may be unable to make timely rental payments.

We face risks associated with property development.

Developing properties present a number of risks for us, including risks that:

• if we are unable to obtain all necessary zoning and other required governmental permits and authorizations or cease development of the project for any other reason, the development opportunity may be abandoned after expending significant resources, resulting in the loss of deposits or failure to recover expenses already incurred;

• the development and construction costs of the project may exceed original estimates due to increased interest rates and increased cost of materials, labor, leasing or other expenditures, which could make the completion of the project less profitable because market rents may not increase sufficiently to compensate for the increase in construction costs;

• construction and/or permanent financing may not be available on favorable terms or may not be available at all, which may cause the cost of the project to increase and lower the expected return;

• the project may not be completed on schedule as a result of a variety of factors, many of which are beyond our control, such as weather, labor conditions and material shortages, which would result in increases in construction costs and debt service expenses; and

• occupancy rates and rents at the newly completed property may not meet the expected levels and could be insufficient to make the property profitable.

Properties developed or acquired for development may generate little or no cash flow from the date of acquisition through the date of completion of development. In addition, new development activities, regardless of whether or not they are ultimately successful, may require a substantial portion of management’s time and attention.

These risks could result in substantial unanticipated delays or expenses and, under certain circumstances, could prevent completion of development activities once undertaken, any of which could have an adverse effect on our financial condition, results of operations, or ability to satisfy our debt service obligations.

We may suffer economic harm as a result of the actions of our partners in real estate joint ventures and other investments.

We may invest in joint ventures or other entities in which we are not the exclusive investor or principal decision maker. Investments in such entities may involve risks not present when a third party is not involved, including the possibility that the other parties to these investments might become bankrupt or fail to fund their share of required capital contributions. Our partners in these entities may have economic, tax or other business interests or goals which are inconsistent with our business interests or goals, and may be in a position to take actions contrary to our policies or objectives. Such investments may also lead to impasses, for example, as to whether to sell a property, because neither we nor the other parties to these investments may have full control over the entity. In addition, we may in certain circumstances be liable for the actions of the other parties to these investments. Each of these factors could have an adverse effect on our financial condition, results of operations, cash flows and ability to make distributions to our shareholders.

Our properties face significant competition.

We face significant competition from developers, owners and operators of office, medical office, retail, multifamily, industrial and other commercial real estate. Substantially all of our properties face competition from similar properties in the same market. Such competition may affect our ability to attract and retain tenants and may reduce the rents we are able to charge. These competing properties may have vacancy rates higher than our properties, which may result in their owners being willing to make space available at lower rents than the space in our properties.

We face risks associated with the use of debt, including refinancing risk.

We rely on borrowings under our credit facilities and offerings of debt securities to finance acquisitions and development activities and for general corporate purposes. The commercial real estate debt markets have in the recent past experienced significant volatility due to a number of factors, including the tightening of underwriting standards by lenders and credit rating agencies and the reported significant inventory of unsold mortgage backed securities in the

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market. The volatility resulted in investors decreasing the availability of debt financing as well as increasing the cost of debt financing. We believe that circumstances could again arise in which we may not be able to obtain debt financing in the future on favorable terms, or at all. If we were unable to borrow under our credit facilities or to refinance existing debt financing, our financial condition and results of operations would likely be adversely affected.

We are subject to the risks normally associated with debt, including the risk that our cash flow may be insufficient to meet required payments of principal and interest. We anticipate that only a small portion of the principal of our debt will be repaid prior to maturity. Therefore, we are likely to need to refinance a significant portion of our outstanding debt as it matures. There is a risk that we may not be able to refinance existing debt or that the terms of any refinancing will not be as favorable as the terms of the existing debt. If principal payments due at maturity cannot be refinanced, extended or repaid with proceeds from other sources, such as new equity capital, our cash flow may not be sufficient to repay all maturing debt in years when significant “balloon” payments come due.

Our degree of leverage could limit our ability to obtain additional financing or affect the market price of our common shares or debt securities.

On February 18, 2011, our total consolidated debt was approximately $1.2 billion. Consolidated debt to consolidated market capitalization ratio, which measures total consolidated debt as a percentage of the aggregate of total consolidated debt plus the market value of outstanding equity securities, is often used by analysts to gauge leverage for equity REITs such as us. Our market value is calculated using the price per share of our common shares. Using the closing share price of $30.90 per share of our common shares on February 18, 2011, multiplied by the number of our common shares, our consolidated debt to total consolidated market capitalization ratio was approximately 38% as of February 18, 2011.

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 two major rating agencies. However, there can be no assurance that 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 and/or difficulty in obtaining additional financing. Our degree of leverage could also make us more vulnerable to a downturn in business or the economy generally. There is a risk that changes in our debt to market capitalization ratio, which is in part a function of our share price, or our ratio of indebtedness to other measures of asset value used by financial analysts, may have an adverse effect on the market price of our equity or debt securities.

Rising interest rates would increase our interest costs.

We may incur indebtedness that bears interest at variable rates. Accordingly, if interest rates increase, so will our interest costs, which could adversely affect our cash flow and our ability to service debt. As a protection against rising interest rates, we may enter into agreements such as interest rate swaps, caps, floors and other interest rate exchange contracts. These agreements, however, increase our risks that other parties to the agreements may not perform or that the agreements may be unenforceable.

Covenants in our debt agreements could adversely affect our financial condition.

Our credit facilities contain customary restrictions, requirements and other limitations on our ability to incur indebtedness. We must maintain a minimum tangible net worth and certain ratios, including a maximum of total liabilities to total gross asset value, a maximum of secured indebtedness to gross asset value, a minimum of annual EBITDA to fixed charges, a minimum of unencumbered asset value to unsecured indebtedness, a minimum of net operating income from unencumbered properties to unsecured interest expense and a maximum of permitted investments to gross asset value. Our ability to borrow under our credit facilities is subject to compliance with our financial and other covenants. The recent economic downturn may adversely affect our ability to comply with these financial and other covenants.

Failure to comply with any of the covenants under our unsecured credit facilities or other debt instruments could result in a default under one or more of our debt instruments. In particular, we could suffer a default under one of our secured debt instruments that could exceed a cross default threshold under our unsecured credit facilities, causing an event of default under the unsecured credit facilities. Alternatively, even if a secured debt instrument is below the cross default threshold for non-recourse secured debt under our unsecured credit facilities, a default under such secured debt instrument may still cause a cross default under our unsecured credit facilities because such secured debt instrument may not qualify as “non-recourse” under the definition in our unsecured credit facilities. Another possible cross default could occur between our unsecured credit facilities, on the one hand, and our senior unsecured notes, on the other hand. Any of the foregoing default or cross

10

default events could cause our lenders to accelerate the timing of payments and/or prohibit future borrowings, either of which would have a material adverse effect on our business, operations, financial condition and liquidity.

We face risks associated with short-term liquid investments.

We have significant cash balances from time to time that we invest in a variety of short-term investments that are intended to preserve principal value and maintain a high degree of liquidity while providing current income. From time to time, these investments may include (either directly or indirectly):

• direct obligations issued by the U.S. Treasury;

• obligations issued or guaranteed by the U.S. government or its agencies;

• taxable municipal securities;

• obligations (including certificates of deposit) of banks and thrifts;

• commercial paper and other instruments consisting of short-term U.S. dollar denominated obligations issued by corporations and banks;

• repurchase agreements collateralized by corporate and asset-backed obligations;

• both registered and unregistered money market funds; and

• other highly rated short-term securities.

Investments in these securities and funds are not insured against loss of principal. Under certain circumstances we may be required to redeem all or part of our investment, and our right to redeem some or all of our investment may be delayed or suspended. In addition, there is no guarantee that our investments in these securities or funds will be redeemable at par value. A decline in the value of our investment or a delay or suspension of our right to redeem may have a material adverse effect on our results of operations or financial condition.

Further issuances of equity securities may be dilutive to current shareholders.

The interests of our existing shareholders could be diluted if additional equity securities are issued, including to finance future developments and acquisitions, instead of incurring additional debt. 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.

Compliance or failure to comply with the Americans with Disabilities Act and other laws and regulations could result in substantial costs.

The Americans with Disabilities Act generally requires that public buildings, including commercial and multifamily properties, be made accessible to disabled persons. Noncompliance could result in imposition of fines by the federal government or the award of damages to private litigants. If, pursuant to the Americans with Disabilities Act, we are required to make substantial alterations and capital expenditures in one or more of our properties, including the removal of access barriers, it could adversely affect our results of operations.

We may also incur significant costs complying with other regulations. Our properties are subject to various federal, state and local regulatory requirements, such as state and local fair housing, rent control and fire and life safety requirements. If we fail to comply with these requirements, we may incur fines or private damage awards. We believe that our properties are currently in material compliance with regulatory requirements. However, we do not know whether existing requirements will change or whether compliance with future requirements will require significant unanticipated expenditures that will adversely affect our results of operations.

Some potential losses are not covered by insurance.

We carry insurance coverage on our properties of types and in amounts that we believe are in line with coverage customarily obtained by owners of similar properties. We believe all of our properties are adequately insured. The property insurance that we maintain for our properties has historically been on an “all risk” basis, which is in full force

11

and effect until renewal in August 2011. There are other types of losses, such as from wars or catastrophic events, for which we cannot obtain insurance at all or at a reasonable cost.

We have an insurance policy which has no terrorism exclusion, except for non-certified nuclear, chemical and biological acts of terrorism. Our financial condition and results of operations are subject to the risks associated with acts of terrorism and the potential for uninsured losses as the result of any such acts. Effective November 26, 2002, under this existing coverage, any losses caused by certified acts of terrorism would be partially reimbursed by the United States under a formula established by federal law. Under this formula the United States pays 85% of covered terrorism losses exceeding the statutorily established deductible paid by the insurance provider, and insurers pay 10% until aggregate insured losses from all insurers reach $100 billion in a calendar year. If the aggregate amount of insured losses under this program exceeds $100 billion during the applicable period for all insured and insurers combined, then each insurance provider will not be liable for payment of any amount which exceeds the aggregate amount of $100 billion. On December 26, 2007, the Terrorism Risk Insurance Program Reauthorization Act of 2007 was signed into law and extends the program through December 31, 2014. We continue to monitor the state of the insurance market in general, and the scope and costs of coverage for acts of terrorism in particular, but we cannot anticipate what amount of coverage will be available on commercially reasonable terms in future policy years.

In the event of an uninsured loss or a loss in excess of our insurance limits, we could lose both the revenues generated from the affected property and the capital we have invested in the affected property. Depending on the specific circumstances of the affected property it is possible that we could be liable for any mortgage indebtedness or other obligations related to the property. Any such loss could adversely affect our business and financial condition and results of operations.

We have to renew our policies in most cases on an annual basis and negotiate acceptable terms for coverage, exposing us to the volatility of the insurance markets, including the possibility of rate increases. Any material increase in insurance rates or decrease in available coverage in the future could adversely affect our results of operations and financial condition.

Actual or threatened terrorist attacks may adversely affect our ability to generate revenues and the value of our properties.

All of our properties are located in or near Washington D.C., a metropolitan area that has been and may in the future be the target of actual or threatened terrorism attacks. As a result, some tenants in our market may choose to relocate their businesses to other markets. This could result in an overall decrease in the demand for commercial space in this market generally, which could increase vacancies in our properties or necessitate that we lease our properties on less favorable terms, or both. In addition, future terrorist attacks in or near Washington D.C. could directly or indirectly damage our properties, both physically and financially, or cause losses that materially exceed our insurance coverage. As a result of the foregoing, our ability to generate revenues and the value of our properties could decline materially.

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, regardless of our knowledge or responsibility, simply because of our current or past ownership or operation of the real estate. In addition, the U.S. Environmental Protection Agency, the U.S. Occupational Safety and Health Administration and other state and local governmental authorities are increasingly involved in indoor air quality standards, especially with respect to asbestos, mold, medical waste and lead-based paint. The clean up of any environmental contamination, including asbestos and mold, can be costly. If environmental problems arise, we may have to make substantial payments which could adversely affect our financial condition and results of operations 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; and

• 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 and in extreme cases could exceed the value of the contaminated property. The presence of hazardous or toxic substances or petroleum products or the failure to properly remediate contamination may 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.

Environmental laws also govern the presence, maintenance and removal of asbestos. Such laws require that owners or operators of buildings containing asbestos:

• properly manage and maintain the asbestos;

• notify and train those who may come into contact with asbestos; and

• undertake special precautions, including removal or other abatement, if asbestos would be disturbed during renovation or demolition of a building.

Such laws may impose fines and penalties on building owners or operators who fail to comply with these requirements and may allow third parties to seek recovery from owners or operators for personal injury associated with exposure to asbestos fibers.

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. However, they do not always involve invasive techniques such as soil and ground water sampling. Where appropriate, on a property-by-property basis, our general practice is to have these consultants conduct additional testing. However, even though these additional assessments may be conducted, there is still the risk that:

• the environmental assessments and updates did 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; and

• future uses or conditions or changes in applicable environmental laws and regulations could result in environmental liability to us.

Failure to qualify as a REIT would cause us to be taxed as a corporation, which would substantially reduce funds available for payment of dividends.

If we fail to qualify as a REIT for federal income tax purposes, we would be taxed as a corporation. We believe that we are organized and qualified as a REIT and intend to operate in a manner that will allow us to continue to qualify as a REIT. However, we cannot assure you that we are qualified as such, or that we will remain qualified as such in the future. This is because qualification as a REIT involves the application of highly technical and complex provisions of the Internal Revenue Code as to which there are only limited judicial and administrative interpretations and involves the determination of facts and circumstances not entirely within our control. Future legislation, new regulations, administrative interpretations or court decisions may significantly change the tax laws or the application of the tax laws with respect to qualification as a REIT for federal income tax purposes or the federal income tax consequences of such qualification.

If we fail to qualify as a REIT we could face serious tax consequences that could substantially reduce our funds available for payment of dividends for each of the years involved because:

• we would not be allowed a deduction for dividends paid to shareholders in computing our taxable income and could be subject to federal income tax at regular corporate rates;

• we also could be subject to the federal alternative minimum tax and possibly increased state and local taxes;

• unless we are entitled to relief under statutory provisions, we could not elect to be subject to tax as a REIT for four taxable years following the year during which we are disqualified; and

• all dividends would be subject to tax as ordinary income to the extent of our current and accumulated earnings and profits potentially eligible as “qualified dividends” subject to the 15% income tax rate.

In addition, if we fail to qualify as a REIT, we would no longer be required to pay dividends. As a result of these factors, our failure to qualify as a REIT could have a material adverse impact on our results of operations, financial condition and liquidity.

13

The market value of our securities can be adversely affected by many factors.

As with any public company, a number of factors may adversely influence the public market price of our common shares. These factors include:

• level of institutional interest in us;

• perceived attractiveness of investment in us, in comparison to other REITs;

• attractiveness of securities of REITs in comparison to other asset classes taking into account, among other things, that a substantial portion of REITs’ dividends are taxed as ordinary income;

• our financial condition and performance;

• the market’s perception of our growth potential and potential future cash dividends;

• government action or regulation, including changes in tax law;

• increases in market interest rates, which may lead investors to expect a higher annual yield from our distributions in relation to the price of our shares;

• changes in federal tax laws;

• changes in our credit ratings;

• relatively low trading volume of shares of REITs in general, which tends to exacerbate a market trend with respect to our shares; and

• any negative change in the level of our dividend or the partial payment thereof in common shares.

We cannot assure you we will continue to pay dividends at historical rates.

Our ability to continue to pay dividends on our common shares at historical rates or to increase our common share dividend rate will depend on a number of factors, including, among others, the following:

• our future financial condition and results of operations;

• the performance of lease terms by tenants;

• the terms of our loan covenants; and

• our ability to acquire, finance, develop or redevelop and lease additional properties at attractive rates.

If we do not maintain or increase the dividend rate on our common shares in the future, it could have an adverse effect on the market price of our common shares.

Provisions of the Maryland General Corporation Law, or the MGCL, may limit a change in control.

There are several provisions of the Maryland General Corporation Law, or the MGCL, that may limit the ability of a third party to undertake a change in control, including:

• a provision where a corporation is not permitted to engage in any business combination with any “interested stockholder,” defined as any holder or affiliate of any holder of 10% or more of the corporation’s stock, for a period of five years after that holder becomes an “interested stockholder;” and

• a provision where the voting rights of “control shares” acquired in a “control share acquisition,” as defined in the MGCL, may be restricted, such that the “control shares” have no voting rights, except to the extent approved by a vote of holders of two-thirds of the common shares entitled to vote on the matter.

These provisions may delay, defer, or prevent a transaction or a change in control that may involve a premium price for holders of our shares or otherwise be in their best interests.

ITEM 1B: UNRESOLVED STAFF COMMENTS

None.

14

ITEM 2: PROPERTIES

The schedule on the following pages lists our real estate investment portfolio as of December 31, 2010, which consisted of 85 properties and land held for development.

As of December 31, 2010, the percent leased is the percentage of net rentable area for which fully executed leases exist and may include signed leases for space not yet occupied by the tenant.

Cost information is included in Schedule III to our financial statements included in this Annual Report on Form 10-K.

Schedule of Properties

Properties	Location	Year Acquired		Year Constructed		Net Rentable Square Feet		Percent Leased 12/31/10
Office Buildings
1901 Pennsylvania Avenue	Washington, D.C.		1977		1960		97,000		81	%
51 Monroe Street	Rockville, MD		1979		1975		210,000		88	%
515 King Street	Alexandria, VA		1992		1966		76,000		100	%
6110 Executive Boulevard	Rockville, MD		1995		1971		198,000		97	%
1220 19th Street	Washington, D.C.		1995		1976		102,000		88	%
1600 Wilson Boulevard	Arlington, VA		1997		1973		166,000		95	%
7900 Westpark Drive	McLean, VA		1997		1972/1986/1999		523,000		92	%
600 Jefferson Plaza	Rockville, MD		1999		1985		112,000		91	%
1700 Research Boulevard	Rockville, MD		1999		1982		101,000		90	%
Wayne Plaza	Silver Spring, MD		2000		1970		91,000		87	%
Courthouse Square	Alexandria, VA		2000		1979		113,000		84	%
One Central Plaza	Rockville, MD		2001		1974		267,000		92	%
The Atrium Building	Rockville, MD		2002		1980		80,000		92	%
1776 G Street	Washington, D.C.		2003		1979		263,000		100	%
Albemarle Point	Chantilly, VA		2005		2001		89,000		80	%
6565 Arlington Blvd	Falls Church, VA		2006		1967/1998		140,000		85	%
West Gude Drive	Rockville, MD		2006		1984/1986/1988		276,000		88	%
The Crescent	Gaithersburg, MD		2006		1989		49,000		89	%
Monument II	Herndon, VA		2007		2000		205,000		65	%
Woodholme Center	Pikesville, MD		2007		1989		73,000		81	%
2000 M Street	Washington, D.C.		2007		1971		227,000		87	%
Dulles Station	Herndon, VA		2005		2007		180,000		94	%
2445 M Street	Washington, D.C.		2008		1986		290,000		100	%
925 Corporate Drive	Stafford, VA		2010		2007		135,000		100	%
1000 Corporate Drive	Stafford, VA		2010		2009		136,000		100	%
Subtotal							4,199,000		90	%
Medical Office Buildings
Woodburn Medical Park I	Annandale, VA		1998		1984		71,000		95	%
Woodburn Medical Park II	Annandale, VA		1998		1988		96,000		99	%
Prosperity Medical Center I	Merrifield, VA		2003		2000		92,000		96	%
Prosperity Medical Center II	Merrifield, VA		2003		2001		88,000		100	%
Prosperity Medical Center III	Merrifield, VA		2003		2002		75,000		100	%
Shady Grove Medical Village II	Rockville, MD		2004		1999		66,000		95	%
8301 Arlington Boulevard	Fairfax, VA		2004		1965		49,000		73	%
Alexandria Professional Center	Alexandria, VA		2006		1968		113,000		93	%
9707 Medical Center Drive	Rockville, MD		2006		1994		38,000		96	%
15001 Shady Grove Road	Rockville, MD		2006		1999		51,000		100	%
Plumtree Medical Center	Bel Air, MD		2006		1991		33,000		95	%

15

SCHEDULE OF PROPERTIES (continued)

Properties	Location	Year Acquired	Year Constructed		Net Rentable* Square Feet		Percent Leased 12/31/10
15005 Shady Grove Road	Rockville, MD	2006	2002			52,000		100	%
2440 M Street	Washington, D.C.	2007	1986/2006			110,000		95	%
Woodholme Medical Office Bldg	Pikesville, MD	2007	1996			125,000		98	%
Ashburn Farm Office Park	Ashburn, VA	2007	1998/2000/2002			75,000		90	%
CentreMed I & II	Centreville, VA	2007	1998			52,000		95	%
Sterling Medical Office Building	Sterling, VA	2008	1986/2000			36,000		85	%
Lansdowne Medical Office Building	Leesburg, VA	2009	2009			87,000		20	%
Subtotal						1,309,000		90	%
Retail Centers
Takoma Park	Takoma Park, MD	1963	1962			51,000		100	%
Westminster	Westminster, MD	1972	1969			151,000		95	%
Concord Centre	Springfield, VA	1973	1960			76,000		92	%
Wheaton Park	Wheaton, MD	1977	1967			72,000		85	%
Bradlee	Alexandria, VA	1984	1955			168,000		99	%
Chevy Chase Metro Plaza	Washington, D.C.	1985	1975			49,000		100	%
Montgomery Village Center	Gaithersburg, MD	1992	1969			198,000		82	%
Shoppes of Foxchase1	Alexandria, VA	1994	1960/2006			134,000		94	%
Frederick County Square	Frederick, MD	1995	1973			227,000		91	%
800 S. Washington Street	Alexandria, VA	1998/2003	1955/1959			44,000		96	%
Centre at Hagerstown	Hagerstown, MD	2002	2000			332,000		96	%
Frederick Crossing	Frederick, MD	2005	1999/2003			295,000		94	%
Randolph Shopping Center	Rockville, MD	2006	1972			82,000		95	%
Montrose Shopping Center	Rockville, MD	2006	1970			143,000		82	%
Gateway Overlook	Columbia, MD	2010	2007			223,000		90	%
Subtotal						2,245,000		92	%
Multifamily Buildings				# of units
3801 Connecticut Avenue	Washington, D.C.	1963	1951	308		179,000		99	%
Roosevelt Towers	Falls Church, VA	1965	1964	191		170,000		99	%
Country Club Towers	Arlington, VA	1969	1965	227		163,000		99	%
Park Adams	Arlington, VA	1969	1959	200		173,000		96	%
Munson Hill Towers	Falls Church, VA	1970	1963	279		259,000		95	%
The Ashby at McLean	McLean, VA	1996	1982	256		252,000		97	%
Walker House Apartments	Gaithersburg, MD	1996	1971/2003	212		159,000		100	%
Bethesda Hill Apartments	Bethesda, MD	1997	1986	195		226,000		98	%
Bennett Park	Arlington, VA	2007	2007	224		268,000		92	%
Clayborne	Alexandria, VA	2008	2008	74		87,000		93	%
Kenmore	Washington, D.C.	2008	1948	374		270,000		99	%
Subtotal				2,540		2,206,000		97	%
Industrial/Flex Properties
Fullerton Business Center	Springfield, VA	1985	1980			104,000		36	%
The Alban Business Center	Springfield, VA	1996	1981/1982			87,000		76	%
Pickett Industrial Park	Alexandria, VA	1997	1973			246,000		100	%
Northern Virginia Industrial Park	Lorton, VA	1998	1968/1991			787,000		71	%
8900 Telegraph Road	Lorton, VA	1998	1985			32,000		23	%
Dulles South IV	Chantilly, VA	1999	1988			83,000		90	%
Sully Square	Chantilly, VA	1999	1986			95,000		78	%

16

SCHEDULE OF PROPERTIES (continued)

Properties	Location	Year Acquired		Year Constructed		Net Rentable Square Feet		Percent Leased 12/31/10
Fullerton Industrial Center	Springfield, VA		2003		1980		137,000		60	%
8880 Gorman Road	Laurel, MD		2004		2000		141,000		100	%
Dulles Business Park Portfolio	Chantilly, VA		2004/2005		1999-2005		324,000		84	%
Albemarle Point	Chantilly, VA		2005		2001/2003/2005		207,000		82	%
Hampton Overlook	Capital Heights, MD		2006		1989/2005		302,000		92	%
9950 Business Parkway	Lanham, MD		2006		2005		102,000		100	%
270 Technology Park	Frederick, MD		2007		1986-1987		157,000		63	%
6100 Columbia Park Road	Landover, MD		2008		1969		150,000		100	%
Subtotal							2,954,000		80	%
TOTAL							12,913,000

¹ Development on approximately 60,000 square feet of the center was completed in December 2006.

* Multifamily buildings are presented in gross square feet.

ITEM 3: LEGAL PROCEEDINGS

None.

ITEM 4: (REMOVED AND RESERVED)

17

PART II

ITEM 5: MARKET FOR THE REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES

Our shares trade on the New York Stock Exchange. Currently, there are approximately 6,130 shareholders of record.

The high and low sales price for our shares for 2010 and 2009, by quarter, and the amount of dividends we paid per share are as follows:

				Quarterly Share Price Range
Quarter		Dividends Per Share		High		Low
2010
	Fourth	$	.43375	$	34.05	$	29.25
	Third	$	.43250	$	32.14	$	26.67
	Second	$	.43250	$	32.75	$	27.32
	First	$	.43250	$	30.77	$	25.09
2009
	Fourth	$	.43250	$	29.00	$	25.58
	Third	$	.43250	$	30.02	$	21.17
	Second	$	.43250	$	23.05	$	16.91
	First	$	.43250	$	27.48	$	15.60

We have historically paid dividends on a quarterly basis. Dividends are primarily paid from our cash flow from operating activities.

During the period covered by this report, we did not sell equity securities without registration under the Securities Act.

Neither we nor any affiliated purchaser (as that term is defined in Securities Exchange Act Rule 10b-18(a) (3)) made any repurchases of our shares during the fourth quarter of the fiscal year covered by this report.

18

ITEM 6: SELECTED FINANCIAL DATA

The following table sets forth our selected financial data on a historical basis, which has been revised for properties disposed of or classified as held for sale (see note 3 to the consolidated financial statements). The following data should be read in conjunction with our financial statements and notes thereto and Management’s Discussion and Analysis of Financial Condition and Results of Operations included elsewhere in this Form 10-K.

	2010		2009		2008		2007		2006
	(in thousands, except per share data)
Real estate rental revenue	$	297,977	$	298,161	$	268,709	$	238,854	$	195,040
Income from continuing operations	$	13,131	$	23,823	$	4,807	$	21,877	$	29,749
Discontinued operations:
Income from operations of properties sold or held for sale	$	2,829	$	3,777	$	7,211	$	10,769	$	8,508
Gain on sale of real estate	$	21,599	$	13,348	$	15,275	$	25,022		—
Net income	$	37,559	$	40,948	$	27,293	$	57,668	$	38,257
Net income attributable to the controlling interests	$	37,426	$	40,745	$	27,082	$	57,451	$	38,053
Income from continuing operations attributable to the controlling interests per share – diluted	$	0.21	$	0.41	$	0.09	$	0.47	$	0.67
Net income attributable to the controlling interests per share – diluted	$	0.60	$	0.71	$	0.55	$	1.24	$	0.87
Total assets	$	2,167,881	$	2,045,225	$	2,109,407	$	1,897,018	$	1,530,863
Lines of credit payable	$	100,000	$	128,000	$	67,000	$	192,500	$	61,000
Mortgage notes payable	$	380,171	$	383,563	$	399,009	$	229,843	$	206,253
Notes payable	$	753,587	$	688,912	$	890,679	$	861,819	$	719,862
Shareholders’ equity	$	857,080	$	745,255	$	636,630	$	502,540	$	449,922
Cash dividends paid	$	108,949	$	100,221	$	85,564	$	78,050	$	72,681
Cash dividends declared and paid per share	$	1.73	$	1.73	$	1.72	$	1.68	$	1.64

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

Our Management’s Discussion and Analysis of Financial Conditions and Results of Operations (“MD&A”) is provided in addition to the accompanying consolidated financial statements and notes to assist readers in understanding our results of operations and financial condition. MD&A is organized as follows:

• Overview. Discussion of our business, operating results, investment activity and capital requirements, and summary of our significant transactions to provide context for the remainder of MD&A.

• Critical Accounting Policies and Estimates. Descriptions of accounting policies that reflect significant judgments and estimates used in the preparation of our consolidated financial statements.

• Results of Operations. Discussion of our financial results comparing 2010 to 2009 and comparing 2009 to 2008.

• Liquidity and Capital Resources. Discussion of our financial condition and analysis of changes in our capital structure and cash flows.

When evaluating our financial condition and operating performance, we focus on the following financial and non-financial indicators:

• Net operating income (“NOI”), calculated as real estate rental revenue less real estate expenses excluding depreciation and amortization and general and administrative expenses. NOI is a non-GAAP supplemental measure to net income.

• Funds From Operations (“FFO”), calculated as set forth below under the caption “Funds from Operations.” FFO is a non-GAAP supplemental measure to net income.

• Occupancy, calculated as occupied square footage as a percentage of total square footage as of the last day of that period.

• Leased percentage, calculated as the percentage of available physical net rentable area leased for our commercial segments and percentage of apartments leased for our multifamily segment.

• Rental rates.

• Leasing activity, including new leases, renewals and expirations.

Overview

Business

Our revenues are derived primarily from the ownership and operation of income-producing properties in the greater Washington metro region. As of December 31, 2010, we owned a diversified portfolio of 85 properties, totaling approximately 10.7 million square feet of commercial space and 2,540 multifamily units, and land held for development. These 85 properties consisted of 25 office properties, 16 industrial/flex properties, 18 medical office properties, 15 retail centers and 11 multifamily properties.

We have a fundamental strategy of regional focus and diversification by property type. In recent years we have sought to pursue a strategy of upgrading our portfolio by selling properties that do not fit our long-term strategy (generally assets in locations that we want to exit), and acquiring or developing higher quality and better located properties. We will seek to continue to upgrade our portfolio as opportunities arise, funding acquisitions with a combination of cash, equity, debt and proceeds from property sales.

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Operating Results

Real estate rental revenue, NOI, net income attributable to the controlling interests and FFO for 2010 and 2009 were as follows (in thousands):

	2010		2009		Change
Real estate rental revenue	$	297,977	$	298,161	$	(184	)
NOI (1)	$	199,055	$	196,857	$	2,198
Net income attributable to the controlling interests	$	37,426	$	40,745	$	(3,319	)
FFO (2)	$	111,566	$	121,771	$	(10,205	)

⁽¹⁾ See pages 32 and 39 of the MD&A for reconciliations of NOI to net income.

⁽²⁾ See page 55 of the MD&A for reconciliations of FFO to net income.

Real estate rental revenues decreased by $0.2 million as lower occupancy in the commercial segments (i.e. office, medical office, retail and industrial) was substantially offset by higher occupancy in the multifamily segment and revenues from our 2010 acquisitions. Lower real estate expenses, primarily utilities and real estate taxes, caused the $2.2 million increase in NOI. Our multifamily segment performed well in 2010, as both occupancy and rental rates increased. However, we experienced a challenging market environment in our commercial segments. While the Washington metro region has emerged from recession, growth remains slow and we continued to have challenges in leasing vacant space, particularly in the office and industrial segments.

While we expect slow but steady improvement in the real estate market conditions in the region during 2011, we anticipate continued challenges in leasing vacant space. We also anticipate several instances where rents on new or renewal leases will be lower than the existing portfolio rents, putting further downward pressure on NOI. Additionally, we were successful in reducing our utilities and real estate taxes during 2010, but do not expect further reductions in 2011. We do plan to actively pursue property acquisitions throughout 2011, which may generate future NOI growth. However, any NOI growth in 2011 from acquisitions would likely be offset by acquisition costs.

The large decreases in net income and FFO during 2010 are primarily attributable to a net loss on extinguishment of debt of $9.2 million from repurchases of our 5.95% senior notes and 3.875% convertible notes. We incurred $8.9 million of this loss during the fourth quarter of 2010.

The performance of our five operating segments and the market conditions in our region are discussed in greater detail below (industry data is as reported by Delta):

• The region’s office market improved during 2010, with overall vacancy decreasing to 11.9% from 13.0% in the prior year. Vacancy in the submarkets was 13.2% for Northern Virginia, 14.1% for Suburban Maryland, and 8.5% in the District of Columbia. Net absorption (defined as the change in occupied, standing inventory from one year to the next) increased to 6.4 million square feet from 0.6 million square feet in 2009, driven by large federal government leases within the District of Columbia. Despite the improving market conditions, the region’s effective rents decreased by 6.5%. Delta does not expect overall rents to begin increasing until 2012. Our office segment was 90.4% leased at year-end 2010, a decrease from 92.1% leased at year-end 2009. By submarket, our office segment was 89.0% leased in Northern Virginia, 89.6% leased in Suburban Maryland, and 93.9% leased in the District of Columbia at year end 2010.

• Our medical office segment was 90.2% leased at year-end 2010, an increase from 89.4% at year-end 2009. The segment’s leased percentage reflects the 2009 acquisition of the newly-constructed Lansdowne Medical Office Building, which was 20.0% leased at year-end 2010. Excluding Lansdowne Medical Office Building, the segment was 95.2% leased at year-end 2010.

• The region’s retail market declined in 2010, with vacancy rates increasing to 5.6% from 5.3% in 2009. Rental rates at grocery-anchored centers decreased 2.4% in 2010, after a 5.8% decrease in 2009. Our retail segment was 92.2% leased at year-end 2010, down from 96.0% at year-end 2009.

• The region’s multifamily market significantly improved during 2010. The region’s vacancy rate for investment grade apartments decreased to 3.4%, down from 4.3% one year ago. During the same period rents increased by 8.2%, which is twice the long-term average. Our multifamily segment was 97.4% leased at year-end 2010, up from 95.8% at year-end 2009.

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• The region’s industrial market began to recover during 2010. Vacancy decreased to 11.0% from 11.4% one year ago, while rents decreased by 3.0%. Net absorption was a positive 1.2 million square feet, compared to a negative 2.3 million square feet one year ago. Our industrial segment was 79.7% leased at year-end 2010, a decrease from 85.3% at year-end 2009. The decrease in occupancy for our industrial properties is driven by evicting non-paying tenants from our buildings, evidenced by a $0.8 million decrease in provisions for bad debt in 2010 as compared to 2009 in our industrial segment.

Investment Activity

We sold eight properties during 2010, while executing three property acquisitions. According to Delta, investment sales of real estate in the Washington metro region increased in 2010 compared to 2009, and this trend is expected to continue in 2011. We are continuing our stated acquisition strategy of focusing on properties inside the Washington metro region’s Beltway, near major transportation nodes and in areas with strong employment drivers and superior growth demographics. We intend to focus our future acquisition activity on the office, medical office, retail and multifamily segments.

We will seek to continue to recycle assets by disposing of properties that do not fit the above acquisition criteria. To that end, we are exploring the sale of all or a portion our industrial/flex segment and potentially using the sale proceeds to further our acquisition strategy. However, we may not receive acceptable offers for these properties. If we did receive an offer we considered acceptable, the completion of a definitive transaction with respect to such offer would still require the successful negotiation of a sale agreement and the approval of WRIT’s Board of Trustees. Lastly, if we identify a potential purchaser of all or a portion of the industrial/flex segment, negotiate an acceptable sale agreement and receive approval from the Board of Trustees to execute any such sale, there could still be conditions to the closing of such transaction that may not be achieved, or we or the potential purchaser otherwise may not be successful in completing such transaction. If we do sell all or a portion of the industrial/flex segment during 2011, we do not expect the resulting decrease in 2011’s net income attributable to the controlling interest to be completely offset by income from potential acquisitions.

Capital Requirements

Over the past year, we continued to focus on strengthening our balance sheet in order to minimize our refinancing risk and prepare for future acquisitions as transaction volume increases. To this end we issued $250.0 million of 4.95% notes due in 2020, using a portion of the proceeds to repurchase $56.1 million of our 5.95% senior notes due in 2011 and $122.8 million of our 3.875% convertible notes which could be put to us at par in 2011. Additionally, we paid off a $23.1 million mortgage note and paid down $28.0 million on our unsecured lines of credit during 2010.

Our unsecured lines of credit currently have $100.0 million outstanding, leaving a remaining borrowing capacity of $237.0 million, and mature in 2011. We currently expect to extend for one year our $75.0 million unsecured line of credit and enter into a new unsecured revolving credit facility at an amount at least equal to our $262.0 million unsecured line of credit during 2011.

We have a combined $105.9 million of unsecured and mortgage notes payable that mature in 2011. We currently expect to pay these maturities with some combination of proceeds from new debt, property sales and equity issuances.

Significant Transactions

We summarize below our significant transactions during the two years ended December 31, 2010:

2010

• The acquisition of two office buildings in Stafford, Virginia, 925 and 1000 Corporate Drive, for $68.0 million, adding approximately 271,000 square feet.

• The acquisition of a retail property in Columbia, Maryland, Gateway Overlook, for $88.4 million, adding approximately 223,000 square feet.

• The disposition of the Parklawn Portfolio, consisting of three office properties and one industrial property, for a contract sales price of $23.4 million and a gain on sale of $7.9 million.

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• The disposition of an office property, the Ridges, for a contract sales price of $27.5 million and a gain on sale of $4.5 million.

• The disposition of three industrial properties, Ammendale I & II and Amvax, for a contract sales price of $23.0 million and a gain on sale of $9.2 million.

• The issuance of $250.0 million of 4.95% unsecured notes due October 1, 2020, with net proceeds of $245.8 million. The notes bear an effective interest rate of 5.053%.

• The repurchases by tender offer of $122.8 million of our 3.875% convertible notes at 102.8 % of par, resulting in a net loss on extinguishment of debt of $6.5 million. Prior to the tender offer, we had executed repurchases of our 3.875% convertible notes totaling $8.8 million at 100.1% of par, resulting in a net loss on extinguishment of debt of $0.3 million.

• The repurchases by tender offer of $56.1 million of our 5.95% senior notes at 103.8% of par, resulting in a net loss on extinguishment of debt of $2.4 million.

• The issuance of 5.6 million common shares at a weighted average price of $30.34 under our sales agency financing agreement, raising $168.9 million in net proceeds.

• The execution of new leases for 1.6 million square feet of commercial space (excluding first generation leases at recently-built properties), with an average rental rate increase of 13.0% over expiring leases.

2009

• The completion of a public offering of 5.25 million common shares priced at $21.40 per share, raising $107.5 million in net proceeds.

• The disposition of one multifamily property, Avondale, for a contract sales price of $19.8 million and a gain on sale of $6.7 million.

• The dispositions of two industrial properties, Tech 100 Industrial Park and Crossroads Distribution Center, for contract sales prices of $10.5 million and $4.4 million, respectively, and gains on sale of $4.1 million and $1.5 million, respectively.

• The disposition of one office property, Brandywine Center, for a contract sales price of $3.3 million and a gain on sale of $1.0 million.

• The acquisition of one newly constructed medical office building, Lansdowne Medical Office Building, for $19.9 million, adding approximately 87,000 square feet, which was 0% leased at the end of 2009.

• The execution of an agreement to modify our $100.0 million unsecured term loan with Wells Fargo Bank, National Association to extend the maturity date from February 19, 2010 to November 1, 2011. This agreement also increased the interest rate on the term loan from LIBOR plus 150 basis points to LIBOR plus 275 basis points. We also entered into a forward interest rate swap on a notional amount of $100.0 million, which had the effect of fixing the interest rate on the loan at 4.85% for the period from February 20, 2010 through the maturity date of November 1, 2011.

• The prepayment of our $100.0 million unsecured term loan with Wells Fargo Bank, National Association on December 1, 2009 using borrowings from our unsecured lines of credit. The prepayment resulted in a $1.5 million loss on extinguishment of debt.

• The issuance of 2.0 million common shares at a weighted average price of $27.37 under our sales agency financing agreement, raising $53.8 million in net proceeds.

• The execution of one mortgage note of approximately $37.5 million at a fixed rate of 5.37%, secured by the Kenmore Apartments.

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• The prepayment of a $50.0 million mortgage note payable bearing interest at 7.14% per annum, secured by Munson Hill Towers, Country Club Towers, Roosevelt Towers, Park Adams Apartments and the Ashby of McLean, with no prepayment penalties.

• The repurchases of $109.7 million of our 3.875% convertible notes at prices ranging from 80% to 97.63% of par, resulting in a net gain on extinguishment of debt of $6.8 million.

• The execution of new leases for 1.4 million square feet of commercial space (excluding first generation leases at recently-built properties), with an average rental rate increase of 10.2% over expiring leases.

Critical Accounting Policies and Estimates

We base the discussion and analysis of our financial condition and results of operations upon our consolidated financial statements, which have been prepared in accordance with accounting principles generally accepted in the United States. The preparation of these financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses. On an on-going basis, we evaluate these estimates, including those related to estimated useful lives of real estate assets, estimated fair value of acquired leases, cost reimbursement income, bad debts, contingencies and litigation. We base the estimates on historical experience and on various other assumptions that we believe to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. We cannot assure you that actual results will not differ from those estimates.

We believe the following accounting estimates are the most critical to aid in fully understanding our reported financial results, and they require our most difficult, subjective or complex judgments, resulting from the need to make estimates about the effect of matters that are inherently uncertain.

Allowance for Doubtful Accounts

We recognize rental income and rental abatements from our multifamily and commercial leases when earned on a straight-line basis over the lease term. We record a provision for losses on accounts receivable equal to the estimated uncollectible amounts. We base this estimate on our historical experience and a monthly review of the current status of our receivables. We consider factors such as the age of the receivable, the payment history of our tenants and our assessment of our tenants’ ability to perform under their lease obligations, among other things. In addition to rents due currently, accounts receivable include amounts representing minimum rental income accrued on a straight-line basis to be paid by tenants over the remaining term of their respective leases. Our estimate of uncollectible accounts is subject to revision as these factors change and is sensitive to the impact of economic and market conditions on tenants.

Accounting for Real Estate Acquisitions

We record acquired or assumed assets, including physical assets and in-place leases, and liabilities, based on their fair values. We record goodwill when the purchase price exceeds the fair value of the assets and liabilities acquired. We determine the estimated fair values of the assets and liabilities in accordance with current GAAP fair value provisions. We determine the fair values of acquired buildings on an “as-if-vacant” basis considering a variety of factors, including the replacement cost of the property, estimated rental and absorption rates, estimated future cash flows and valuation assumptions consistent with current market conditions. We determine the fair value of land based on comparisons to similar properties that have been recently marketed for sale or sold.

The fair value of in-place leases consists of the following components: (a) the estimated cost to us to replace the leases, including foregone rents during the period of finding a new tenant and foregone recovery of tenant pass-throughs (referred to as “absorption cost”), (b) the estimated cost of tenant improvements, and other direct costs associated with obtaining a new tenant (referred to as “tenant origination cost”); (c) estimated leasing commissions associated with obtaining a new tenant (referred to as “leasing commissions”); (d) the above/at/below market cash flow of the leases, determined by comparing the projected cash flows of the leases in place to projected cash flows of comparable market-rate leases (referred to as “net lease intangible”); and (e) the value, if any, of customer relationships, determined based on our evaluation of the specific characteristics of each tenant’s lease and our overall relationship with the tenant (referred to as “customer relationship value”).

We discount the amounts used to calculate net lease intangibles using an interest rate which reflects the risks associated with the leases acquired. We include tenant origination costs in income producing property on our balance sheet and amortize the tenant origination costs as depreciation expense on a straight-line basis over the useful life of the asset,

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which is typically the remaining life of the underlying leases. We classify leasing commissions and absorption costs as other assets and amortize leasing commissions and absorption costs as amortization expense on a straight-line basis over the remaining life of the underlying leases. We classify above market net lease intangible assets as other assets and amortize net lease intangible assets on a straight-line basis as a decrease to real estate rental revenue over the remaining term of the underlying leases. We classify below market net lease intangible liabilities as other liabilities and amortize net lease intangible liabilities on a straight-line basis as an increase to real estate rental revenue over the remaining term of the underlying leases. Should a tenant terminate its lease, we write off the unamortized portion of the tenant origination cost (if it has no future value), leasing commissions, absorption costs and net lease intangible associated with that lease.

Capitalized Interest

We capitalize interest costs incurred on borrowing obligations while qualifying assets are being readied for their intended use. We amortize capitalized interest over the useful life of the related underlying assets upon those assets being placed into service.

Real Estate Impairment

We recognize impairment losses on long-lived assets used in operations and held for sale, development assets or land held for future development, if indicators of impairment are present and the net undiscounted cash flows estimated to be generated by those assets are less than the assets' carrying amount and estimated undiscounted cash flows associated with future development expenditures. If such carrying amount is in excess of the estimated cash flows from the operation and disposal of the property, we would recognize an impairment loss equivalent to an amount required to adjust the carrying amount to the estimated fair value. The estimated fair value would be calculated in accordance with current GAAP fair value provisions.

Stock Based Compensation

We initially measure compensation expense for restricted performance-based share units at fair value at the grant date as payouts are probable, and we re-measure compensation expense at subsequent reporting dates until all of the award’s key terms and conditions are known and a vesting has occurred. The number of restricted performance-based share units that actually vest may differ significantly from our estimates. We amortize such performance-based share units to expense over the performance period.

We measure compensation expense for performance-based share units with market conditions based on the grant date fair value, as determined using a Monte Carlo simulation. We amortize the expense ratably over the requisite service period, regardless of whether the market conditions are achieved and the awards ultimately vest.

We estimate forfeitures for unvested stock based compensation based on historical pre-vesting employee forfeiture patterns. We ultimately adjust our pre-vesting forfeiture assumptions to actual forfeiture rates, so changes in forfeiture assumptions would not affect the total expense ultimately recognized over the vesting period. Estimated forfeitures are reassessed each reporting period based on historical experience and current projections for the future.

Federal Income Taxes

Generally, and subject to our ongoing qualification as a REIT, no provisions for income taxes are necessary except for taxes on undistributed REIT taxable income and taxes on the income generated by our taxable REIT subsidiaries (“TRS”). Our TRS is subject to corporate federal and state income tax on its taxable income at regular statutory rates. Our TRS has net operating loss carryforwards that begin to expire in 2028. We have determined that there were no material income tax provisions or material net deferred income tax items for our TRS.

Results of Operations

The discussion that follows is based on our consolidated results of operations for the years ended December 31, 2010, 2009 and 2008. The ability to compare one period to another is significantly affected by acquisitions completed and dispositions made during those years.

For purposes of evaluating comparative operating performance, we categorize our properties as “same-store”, “non-same-store” or discontinued operations. A “same-store” property is one that was owned for the entirety of the periods being evaluated and is included in continuing operations. A “non-same-store” property is one that was acquired or

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placed into service during either of the periods being evaluated and is included in continuing operations. We classify results for properties sold or held for sale during any of the periods evaluated as discontinued operations.

Properties we acquired during the years ending December 31, 2010, 2009 and 2008 are as follows:

Acquisition Date	Property	Type	Rentable Square Feet		Contract Purchase  Price (In thousands)
June 3, 2010	925 and 1000 Corporate Drive	Office		271,000	$	68,000
December 1, 2010	Gateway Overlook	Retail		223,000		88,400
		Total 2010		494,000	$	156,400
August 13, 2009	Lansdowne Medical Office Building	Medical Office		87,000	$	19,900
		Total 2009		87,000	$	19,900
February 22, 2008	6100 Columbia Park Road	Industrial/Flex		150,000	$	11,200
May 21, 2008	Sterling Medical Office Building	Medical Office		36,000		6,500
September 3, 2008	Kenmore Apartments (374 units)	Multifamily		270,000		58,300
December 2, 2008	2445 M Street	Office		290,000		181,400
		Total 2008		746,000	$	257,400

Properties we sold or classified as held for sale during the three years ending December 31, 2010 are as follows:

Disposition Date	Property	Type	Rentable Square Feet		Contract Purchase  Price (In thousands)
June 18, 2010	Parklawn Portfolio(1)	Office/Industrial		229,000	$	23,400
December 21, 2010	The Ridges	Office		104,000		27,500
December 22, 2010	Ammendale I&II/Amvax	Industrial		305,000		23,000
		Total 2010		638,000	$	73,900
May 13, 2009	Avondale	Multifamily		170,000	$	19,800
July 23, 2009	Tech 100 Industrial Park	Industrial		166,000		10,500
July 31, 2009	Brandywine Center	Office		35,000		3,300
November 13, 2009	Crossroads Distribution Center	Industrial		85,000		4,400
		Total 2009		456,000	$	38,000
June 6, 2008	Sullyfield Center/The Earhart Building	Industrial		336,000	$	41,100
		Total 2008		336,000	$	41,100

⁽¹⁾ The Parklawn Portfolio consists of three office properties (Parklawn Plaza, Lexington Building and Saratoga Building) and one industrial property (Charleston Business Center).

We placed into service two development properties, Clayborne Apartments and Dulles Station, Phase I, in 2008. These properties were stabilized during the second quarter of 2009.

To provide more insight into our operating results, we divide our discussion into two main sections: (a) the consolidated results of operations section, in which we provide an overview analysis of results on a consolidated basis, and (b) the net operating income (“NOI”) section, in which we provide a detailed analysis of same-store versus non-same-store NOI results by segment. NOI is a non-GAAP measure calculated as real estate rental revenue less real estate expenses excluding depreciation and amortization and general and administrative expenses.

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Consolidated Results of Operations

Real Estate Rental Revenue

Real estate rental revenue for properties classified as continuing operations is summarized as follows (all data in thousands except percentage amounts):

	2010			2009			2008			2010 vs 2009			% Change			2009 vs 2008			% Change
Minimum base rent	$	260,860		$	257,628		$	234,288		$	3,232			1.3	%	$	23,340			10.0	%
Recoveries from tenants		31,328			35,495			29,599			(4,167	)		(11.7	%)		5,896			19.9	%
Provisions for doubtful accounts		(5,465	)		(6,069	)		(4,113	)		604			10.0	%		(1,956	)		(47.6	%)
Lease termination fees		780			1,471			293			(691	)		(47.0	%)		1,178			402.0	%
Parking and other tenant charges		10,474			9,636			8,642			838			8.7	%		994			11.5	%
	$	297,977		$	298,161		$	268,709		$	(184	)		(0.1	%)		29,452			11.0	%

Real estate rental revenue is comprised of (a) minimum base rent, which includes rental revenues recognized on a straight-line basis, (b) revenue from the recovery of operating expenses from our tenants, (c) provisions for doubtful accounts, which include provisions for straight-line receivables, (d) revenue from the collection of lease termination fees and (e) parking and other tenant charges such as percentage rents.

Minimum Base Rent: Minimum base rent increased by $3.2 million in 2010 as compared to 2009 due to properties acquired or placed into service in 2010 and 2009 ($6.8 million). Minimum base rent from same-store properties decreased by $3.6 million due to lower occupancy ($6.9 million) and higher rent abatements ($0.4 million), partially offset by higher rental rates ($4.3 million).

Minimum base rent increased by $23.3 million in 2009 as compared to 2008 due primarily to properties acquired or placed into service in 2009 and 2008 ($21.0 million), combined with a $2.3 million increase in minimum base rent from same-store properties due to higher rental rates ($4.9 million) and lower amortization of intangible lease assets ($0.8 million), partially offset by higher vacancy ($3.4 million).

Recoveries from Tenants: Recoveries from tenants decreased by $4.2 million in 2010 as compared to 2009 due primarily to lower real estate tax recoveries ($2.8 million) caused by lower property tax assessments across the portfolio, as well as lower operating expense and electricity reimbursements ($1.4 million) driven by lower electricity rates and lower occupancy.

Recoveries from tenants increased by $5.9 million in 2009 as compared to 2008 due primarily to properties acquired or placed into service in 2009 and 2008 ($5.5 million), combined with a $0.4 million increase in recoveries from tenants from same-store properties primarily due to higher utilities reimbursements ($0.7 million) and real estate tax reimbursements ($0.4 million), offset by lower common area maintenance reimbursements ($0.7 million) due to lower occupancy.

Provisions for Doubtful Accounts: Provisions for doubtful accounts decreased by $0.6 million in 2010 as compared to 2009 due to lower provisions in the industrial segment ($0.7 million). This decrease in the industrial segment was due to evicting non-paying tenants from our buildings.

Provisions for doubtful accounts increased by $2.0 million in 2009 as compared to 2008 due to higher provisions in the office ($1.5 million) and retail ($0.7 million) segments, offset by lower provisions in the medical office segment ($0.3 million).

Lease Termination Fees: Lease termination fees decreased by $0.7 million in 2010 as compared to 2009 due primarily to lower fees in the office ($0.3 million), retail ($0.3 million) and medical office ($0.1 million) segments.

Lease termination fees increased by $1.2 million in 2009 as compared to 2008 due primarily to higher fees in the office ($0.4 million), retail ($0.3 million) and industrial ($0.4 million) segments.

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Parking and Other Tenant Charges: Parking and other tenant charges increased by $0.8 million in 2010 as compared to 2009 due primarily to an increase in antenna rent ($0.5 million) in the office and multifamily segments due to new antenna leases, as well as an increase in parking income ($0.4 million).

Parking and other tenant charges increased by $1.0 million in 2009 as compared to 2008 due primarily to properties acquired or placed into service in 2009 and 2008 ($0.8 million), combined with a $0.2 million increase in parking and other tenant charges from same-store properties primarily due to higher parking fees ($0.1 million) in the office segment.

A summary of occupancy for properties classified as continuing operations by segment follows:

Consolidated Occupancy
Segment	2010			2009			2008			2010 vs 2009			2009 vs 2008
Office		89.4	%		91.4	%		91.8	%		(2.0	%)		(0.4	%)
Medical Office		88.5	%		87.9	%		94.0	%		0.6	%		(6.1	%)
Retail		92.1	%		93.6	%		95.2	%		(1.5	%)		(1.6	%)
Multifamily		95.7	%		94.4	%		89.5	%		1.3	%		4.9	%
Industrial		78.6	%		84.8	%		91.4	%		(6.2	%)		(6.6	%)
Total		88.3	%		90.3	%		92.1	%		(2.0	%)		(1.8	%)

Occupancy represents occupied square footage indicated as a percentage of total square footage as of the last day of that period.

Our overall occupancy decreased to 88.3% in 2010 from 90.3% in 2009, as our portfolio experienced occupancy declines in the office, retail and industrial segments.

Our overall occupancy decreased to 90.3% in 2009 from 92.1% in 2008, primarily due to lower occupancy in the industrial and medical office segments. The lower industrial occupancy reflects weakness in that market segment, while the medical office decrease is due to the 2009 acquisition of the newly-built and vacant Lansdowne Medical Office Building. These were partially offset by the lease-up of our development properties during 2009. Bennett Park, Clayborne Apartments and Dulles Station, Phase I were placed into service at the end of 2007 and during 2008, and were 98%, 95% and 91% leased at the end of 2009, respectively.

A detailed discussion of occupancy by sector can be found in the Net Operating Income section.

Real Estate Expenses

Real estate expenses are summarized as follows (all data in thousands except percentage amounts):

	2010		2009		2008		2010 vs 2009			% Change			2009 vs 2008		% Change
Property operating expenses	$	69,713	$	69,404	$	63,058	$	309			0.4	%	$	6,346		10.1	%
Real estate taxes		29,209		31,900		27,164		(2,691	)		(8.4	%)		4,736		17.4	%
	$	98,922	$	101,304	$	90,222	$	(2,382	)		(2.4	%)	$	11,082		12.3	%

Real estate expenses as a percentage of revenue were 33.2% for 2010, 34.0% for 2009 and 33.6% for 2008.

Property Operating Expenses: Property operating expenses include utilities, repairs and maintenance, property administration and management, operating services, common area maintenance, property insurance, bad debt and other operating expenses.

Property operating expenses increased $0.3 million in 2010 as compared to 2009 due primarily to properties acquired and placed into service in 2010 and 2009, which contributed to a $1.6 million increase in expenses. Property operating expenses from same-store properties decreased by $1.3 million, caused by lower electricity costs ($1.2 million) due to decreased rates and lower occupancy.

Property operating expenses increased $6.3 million in 2009 as compared to 2008 due primarily to properties acquired and placed into service in 2009 and 2008, which accounted for $4.8 million of the increase. Property operating expenses from same-store properties increased by $1.5 million, caused by higher utilities costs ($0.6 million) due to increased

28

electricity rates and higher snow removal costs ($1.3 million, not including any tenant reimbursements) due to a severe snow storm in December 2009.

Real Estate Taxes: Real estate taxes decreased $2.7 million in 2010 as compared to 2009 due primarily to lower assessments across the portfolio.

Real estate taxes increased $4.7 million in 2009 as compared to 2008 due primarily to the properties acquired or placed into service in 2009 and 2008, which accounted for $3.4 million of the increase. Real estate taxes on same-store properties increased by $1.3 million due primarily to higher rates and assessments across the portfolio.

Other Operating Expenses

Other operating expenses are summarized as follows (all data in thousands except percentage amounts):

	2010		2009		2008		2010 vs 2009			% Change			2009 vs 2008			% Change
Depreciation and amortization	$	93,992	$	91,668	$	82,982	$	2,324			2.5	%	$	8,686			10.5	%
Interest expense		68,389		74,074		74,095		(5,685	)		(7.7	%)		(21	)		0.0	%
General and administrative		14,406		13,118		12,110		1,288			9.8	%		1,008			8.3	%
	$	176,787	$	178,860	$	169,187	$	(2,073	)		(1.2	%)	$	9,673			5.7	%

Depreciation and Amortization: Depreciation and amortization expense increased by $2.3 million in 2010 as compared to 2009 due primarily to properties acquired and placed into service of $156.4 million and $19.9 million in 2010 and 2009, respectively.

Depreciation and amortization expense increased by $8.7 million in 2009 as compared to 2008 due primarily to properties acquired and placed into service of $19.9 million and $257.4 million in 2009 and 2008, respectively.

Interest Expense: A summary of interest expense for the years ended December 31, 2010, 2009 and 2008 appears below (in millions, except percentage amounts):

Debt Type	2010			2009			2008			2010 vs. 2009			% Change			2009 vs. 2008			% Change
Notes payable	$	41.7		$	48.2		$	53.2		$	(6.5	)		(13.5	%)	$	(5.0	)		(9.4	%)
Mortgages		23.7			25.8			17.5			(2.1	)		(8.1	%)		8.3			47.4	%
Lines of credit/short-term note payable		3.8			1.5			5.7			2.3			153.3	%		(4.2	)		(73.7	%)
Capitalized interest		(0.8	)		(1.4	)		(2.3	)		0.6			(42.9	%)		0.9			(39.1	%)
Total	$	68.4		$	74.1		$	74.1		$	(5.7	)		(7.7	%)	$	—			—	%

Interest expense decreased by $5.7 million in 2010 compared to 2009. We paid off a $100.0 million term loan in December 2009 using one of our lines of credit, resulting in a net interest expense decrease of $2.9 million during 2010. Additionally, we used the proceeds from the issuance of 4.95% senior notes to pay down significant portions of our 3.875% convertible notes and our 5.95% senior notes, resulting in a net interest expense decrease of $1.4 million. Mortgage interest expense decreased by $2.1 million due to the payoff of a $50.0 million mortgage note in July 2009. These were partially offset by a $0.6 million decrease in capitalized interest.

Interest expense was the same in 2009 compared to 2008. An $8.3 million increase in mortgage interest due to entering into three new mortgage notes during the second quarter of 2008 and assuming the 2445 M Street mortgage in the fourth quarter of 2008 was offset by lower notes payable interest due to early paydowns of notes. Also, interest on our unsecured lines of credit decreased by $4.2 million due to lower balances outstanding and lower interest rates. The proceeds of the 2008 mortgage notes were used to pay down our unsecured lines of credit.

General and Administrative Expense: General and administrative expense increased by $1.3 million in 2010 as compared to 2009 due primarily to higher incentive compensation expense and the reorganization of the leasing department.

General and administrative expense increased by $1.0 million in 2009 as compared to 2008 due primarily to higher incentive compensation expense ($2.1 million), partially offset by an increase in the cash surrender value of officer life insurance policies ($0.6 million).

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Discontinued Operations

We dispose of assets (sometimes using tax-deferred exchanges) that no longer meet our long-term strategy or return objectives and where market conditions for sale are favorable. The proceeds from the sales may be reinvested into other properties, used to fund development operations or to support other corporate needs, or distributed to our shareholders.

We sold the following properties during the three years ended December 31, 2010:

Disposition Date	Property	Type	Rentable Square Feet (unaudited)		Contract Sales Price (in thousands)		Gain on Sale (in thousands)
June 18, 2010	Parklawn Portfolio(1)	Office/Industrial		229,000	$	23,400	$	7,900
December 21, 2010	The Ridges	Office		104,000		27,500		4,500
December 22, 2010	Ammendale I&II/ Amvax	Industrial		305,000		23,000		9,200
		Total 2010		638,000	$	73,900	$	21,600
May 13, 2009	Avondale	Multifamily		170,000	$	19,800	$	6,700
July 23, 2009	Tech 100 Industrial Park	Industrial		166,000		10,500		4,100
July 31, 2009	Brandywine Center	Office		35,000		3,300		1,000
November 13, 2009	Crossroads Distribution Center	Industrial		85,000		4,400		1,500
		Total 2009		456,000	$	38,000	$	13,300
June 6, 2008	Sullyfield Center/The Earhart Building	Industrial		336,000	$	41,100	$	15,300
		Total 2008		336,000	$	41,100	$	15,300

⁽¹⁾ The Parklawn Portfolio consists of three office properties (Parklawn Plaza, Lexington Building and Saratoga Building) and one industrial property (Charleston Business Center).

Operating results of the properties classified as discontinued operations are summarized as follows (in thousands, except for percentages):

	2010			2009			2008			2010 vs. 2009			% Change			2009 vs. 2008			% Change
Revenues	$	8,159		$	12,114		$	18,478		$	(3,955	)		(32.6	%)	$	(6,364	)		(34.4	%)
Property expenses		(2,987	)		(4,631	)		(6,405	)		1,644			35.5	%		1,774			27.7	%
Depreciation and amortization		(1,754	)		(2,779	)		(3,916	)		1,025			36.9	%		1,137			29.0	%
Interest expense		(589	)		(927	)		(946	)		338			36.5	%		19			2.0	%
Total	$	2,829		$	3,777		$	7,211		$	(948	)		(25.1	%)	$	(3,434	)		(47.6	%)

Income from operations of properties sold or held for sale decreased by $0.9 million in 2010 compared to 2009 due to the sales of the Parklawn Portfolio, the Ridges, Ammendale I and II and Amvax in 2010.

Income from operations of properties sold or held for sale decreased by $3.4 million in 2009 compared to 2008 due to the sales of Avondale, Tech 100 Industrial Park, Brandywine Center and Crossroads Distribution Center in 2009.

Net Operating Income

NOI is the primary performance measure we use to assess the results of our operations at the property level. We believe that NOI is useful as a performance measure because, when compared across periods, NOI reflects the impact on operations of trends in occupancy rates, rental rates and operating costs on an unleveraged basis, providing perspective not immediately apparent from net income. NOI excludes certain components from net income in order to provide results more closely related to a property’s results of operations. For example, interest expense is not necessarily linked to the operating performance of a real estate asset. In addition, depreciation and amortization, because of historical cost accounting and useful life estimates, may distort operating performance at the property level. As a result of the foregoing, we provide NOI as a supplement to net income calculated in accordance with GAAP. NOI does not represent net income calculated in accordance with GAAP. As such, it should not be considered an alternative to net income as an indication of our operating performance. NOI is calculated as real estate rental revenue less real estate expenses

30

excluding depreciation and amortization and general and administrative expenses. A reconciliation of NOI to net income follows.

31

2010 Compared to 2009

The following tables of selected operating data provide the basis for our discussion of NOI in 2010 compared to 2009. All amounts are in thousands except percentage amounts.

	Years Ended December 31,
	2010			2009			$ Change			% Change
Real Estate Rental Revenue
Same-store	$	279,865		$	287,252		$	(7,387	)		(2.6	%)
Non-same-store (1)		18,112			10,909			7,203			66.0	%
Total real estate rental revenue	$	297,977		$	298,161		$	(184	)		(0.1	%)
Real Estate Expenses
Same-store	$	91,649		$	95,999		$	(4,350	)		(4.5	%)
Non-same-store (1)		7,273			5,305			1,968			37.1	%
Total real estate expenses	$	98,922		$	101,304		$	(2,382	)		(2.4	%)
NOI
Same-store	$	188,216		$	191,253		$	(3,037	)		(1.6	%)
Non-same-store (1)		10,839			5,604			5,235			93.4	%
Total NOI	$	199,055		$	196,857		$	2,198			1.1	%
Reconciliation to Net Income
NOI	$	199,055		$	196,857
Other income (expense)		32			417
Income from non-disposal activities		7			73
Interest expense		(68,389	)		(74,074	)
Depreciation and amortization		(93,992	)		(91,668	)
General and administrative expenses		(14,406	)		(13,118	)
Gain (loss) on extinguishment of debt		(9,176	)		5,336
Discontinued operations(2)		2,829			3,777
Gain on sale of real estate		21,599			13,348
Net income		37,559			40,948
Less: Net income attributable to noncontrolling interests		(133	)		(203	)
Net income attributable to the controlling interests	$	37,426		$	40,745

Occupancy	2010			2009
Same-store		88.4	%		90.9	%
Non-same-store (1)		87.0	%		77.0	%
Total		88.3	%		90.3	%

⁽¹⁾ Non-same-store properties include:

Multifamily development properties – Clayborne Apartments and Bennett Park

Office development property – Dulles Station, Phase I

2010 Office acquisitions – 925 and 1000 Corporate Drive

2010 Retail acquisition – Gateway Overlook

2009 Medical Office acquisition – Lansdowne Medical Office Building

⁽²⁾ Discontinued operations include gain on disposals and income from operations for:

2010 dispositions –	Parklawn Plaza, Lexington Building, Saratoga Building, Charleston Business Center, the Ridges, Ammendale I&II and Amvax
2009 dispositions –	Avondale, Tech 100 Industrial Park, Brandywine Center and Crossroads Distribution Center

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Real estate rental revenue decreased by $0.2 million in 2010 as compared to 2009 as lower real estate revenue from same-store properties was offset by acquisition and development properties. Real estate rental revenue from same-store properties decreased by $7.4 million due to lower occupancy ($6.9 million) and lower recoveries from tenants ($4.7 million), partially offset by higher rental rates ($4.3 million).

Real estate expenses decreased by $2.4 million in 2010 as compared to 2009 due primarily to lower real estate taxes ($3.0 million) and lower electricity expense ($1.2 million) in the same-store portfolio, partially offset by a $2.0 million increase in real estate expenses attributable to acquisition and development properties.

Same-store occupancy decreased to 88.4% in 2010 from 90.9% in 2009, with the most severe decreases in the industrial and office segments. Non-same-store occupancy increased to 87.0% in 2010 from 77.0% in 2009, driven by the acquisitions in 2010 of Quantico Corporate Center (925 and 1000 Corporate Drive) and Gateway Overlook, which were 100.0% and 88.2% occupied, respectively, at the end of 2010. During 2010, 59.0% of the commercial square footage expiring was renewed as compared to 68.2% in 2009, excluding properties sold or classified as held for sale. During 2010, 1.6 million commercial square feet were leased at an average rental rate of $23.09 per square foot, an increase of 13.0%, with average tenant improvements and leasing costs of $17.45 per square foot. These leasing statistics exclude first generation leases at development properties.

An analysis of NOI by segment follows.

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Office Segment:

	Years Ended December 31,
	2010		2009		$ Change			% Change
Real Estate Rental Revenue
Same-store	$	121,783	$	126,725	$	(4,942	)		(3.9	%)
Non-same-store (1)		9,374		3,946		5,428			137.6	%
Total real estate rental revenue	$	131,157	$	130,671	$	486			0.4	%
Real Estate Expenses
Same-store	$	42,062	$	44,997	$	(2,935	)		(6.5	%)
Non-same-store (1)		3,258		1,531		1,727			112.8	%
Total real estate expenses	$	45,320	$	46,528	$	(1,208	)		(2.6	%)
NOI
Same-store	$	79,721	$	81,728	$	(2,007	)		(2.5	%)
Non-same-store (1)		6,116		2,415		3,701			153.3	%
Total NOI	$	85,837	$	84,143	$	1,694			2.0	%

Occupancy	2010			2009
Same-store		88.4	%		91.5	%
Non-same-store (1)		97.5	%		89.4	%
Total		89.4	%		91.4	%

⁽¹⁾ Non-same-store properties include:

Development property – Dulles Station, Phase I

Acquisitions – 925 and 1000 Corporate Drive

Real estate rental revenue in the office segment increased by $0.5 million in 2010 as compared to 2009 due to acquisition and development properties, which contributed all of the increase. Real estate rental revenue from same-store properties decreased by $4.9 million primarily due to lower same-store occupancy ($3.8 million), lower recoveries from tenants ($2.8 million) and higher rent abatements ($0.5 million), partially offset by higher rental rates ($2.0 million) and antenna rent ($0.3 million).

Real estate expenses in the office segment decreased by $1.2 million in 2010 as compared to 2009 due primarily to lower real estate taxes ($1.5 million) caused by lower property assessments, recoveries of bad debt ($1.0 million) and lower utilities expense ($0.7 million) in the same-store portfolio. These were offset by higher real estate expenses attributable to acquisition ($1.3 million) and development ($0.4 million) properties.

Same-store occupancy decreased to 88.4% in 2010 from 91.5% in 2009, primarily caused by higher vacancy at Monument II due to the non-renewal of a major tenant. Non-same-store occupancy increased to 97.5% from 89.4%, reflecting the acquisition of the fully-leased 925 and 1000 Corporate Drive. During 2010, 48.9% of the square footage that expired was renewed compared to 61.9% in 2009, excluding properties sold or classified as held for sale. During 2010, we executed new leases for 577,000 square feet of office space at an average rental rate of $30.72 per square foot, an increase of 9.2%, with average tenant improvements and leasing costs of $33.60 per square foot. These leasing statistics exclude first generation leases at the development property, Dulles Station, Phase I.

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Medical Office Segment:

	Years Ended December 31,
	2010			2009			$ Change			% Change
Real Estate Rental Revenue
Same-store	$	44,949		$	44,911		$	38			0.1	%
Non-same-store (1)		79			—			79			—
Total real estate rental revenue	$	45,028		$	44,911		$	117			0.3	%
Real Estate Expenses
Same-store	$	14,205		$	15,051		$	(846	)		(5.6	%)
Non-same-store (1)		510			167			343			205.4	%
Total real estate expenses	$	14,715		$	15,218		$	(503	)		(3.3	%)
NOI
Same-store	$	30,744		$	29,860		$	884			3.0	%
Non-same-store (1)		(431	)		(167	)		(264	)		(158.1	%)
Total NOI	$	30,313		$	29,693		$	620			2.1	%

Occupancy	2010			2009
Same-store		93.8	%		94.2	%
Non-same-store (1)		14.7	%		0.0	%
Total		88.5	%		87.9	%

⁽¹⁾ Non-same-store properties include:

2009 acquisition – Lansdowne Medical Office Building

Real estate rental revenue in the medical office segment increased by $0.1 million in 2010 as compared to 2009 due primarily to the acquisition of Lansdowne Medical Office Building. Real estate rental revenue from same-store properties slightly increased as higher rental rates ($1.3 million) were offset by higher vacancy ($0.4 million), lower tenant reimbursements for real estate taxes ($0.7 million) and higher bad debt ($0.1 million).

Real estate expenses in the medical office segment decreased by $0.5 million in 2010 as compared to 2009 due primarily to lower real estate taxes ($0.6 million) and lower utilities expense ($0.3 million) in the same-store portfolio. These were partially offset by higher real estate expenses ($0.3 million) from the acquisition property.

Same-store occupancy decreased to 93.8% in 2010 from 94.2% in 2009 due to small decreases in occupancy at several properties. Non-same-store occupancy increased to 14.7% from 0.0%, reflecting the limited progress made in the lease-up of Lansdowne Medical Office Building, which was vacant when acquired during the third quarter of 2009. This building was 20.0% leased as of the end of 2010. During 2010, 78.9% of the square footage that expired was renewed compared to 64.4% in 2009. During 2010, we executed new leases for 193,600 square feet of medical office space at an average rental rate of $37.78, an increase of 19.2%, with average tenant improvements and leasing costs of $25.30 per square foot. These leasing statistics exclude first generation leases at Lansdowne Medical Office Building, which was newly-constructed and vacant when acquired.

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Retail Segment:

	Years Ended December 31,
	2010		2009		$ Change			% Change
Real Estate Rental Revenue
Same-store	$	40,376	$	41,821	$	(1,445	)		(3.5	%)
Non-same-store (1)		627		—		627			—
Total real estate rental revenue	$	41,003	$	41,821	$	(818	)		(2.0	%)
Real Estate Expenses
Same-store	$	10,180	$	10,680	$	(500	)		(4.7	%)
Non-same-store (1)		130		—		130			—
Total real estate expenses	$	10,310	$	10,680	$	(370	)		(3.5	%)
NOI
Same-store	$	30,196	$	31,141	$	(945	)		(3.0	%)
Non-same-store (1)		497		—		497			—
Total NOI	$	30,693	$	31,141		(448	)		(1.4	%)

Occupancy	2010			2009
Same-store		92.5	%		93.6	%
Non-same-store (1)		88.2	%		—
Total		92.1	%		93.6	%

⁽¹⁾ Non-same-store properties include:

2010 acquisition – Gateway Overlook

Real estate rental revenue in the retail segment decreased by $0.8 million in 2010 as compared to 2009 due to higher vacancy ($1.2 million) and lower tenant reimbursements for real estate taxes ($0.3 million) in the same-store portfolio. These were partially offset by real estate rental revenue from the 2010 acquisition of Gateway Overlook ($0.6 million).

Real estate expenses in the retail segment decreased by $0.4 million in 2010 as compared to 2009 due to lower legal fees ($0.5 million) related to litigation in 2009 concerning the remediation of an environmental condition at Westminster Shopping Center. This was partially offset by real estate expenses from the acquisition property ($0.1 million).

Same-store occupancy decreased to 92.5% in 2010 from 93.6% in 2009, driven by lower occupancy at Frederick Crossing and Wheaton Park, which was partially offset by higher occupancy at the Centre at Hagerstown. The non-same-store occupancy of 88.2% reflects the acquisition of Gateway Overlook during the fourth quarter of 2010. During 2010, 72.7% of the square footage that expired was renewed compared to 52.2% in 2009. During 2010, we executed new leases for 269,200 square feet of retail space at an average rental rate of $21.39, an increase of 18.6% from 2009, with average tenant improvements and leasing costs of $6.11 per square foot.

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Multifamily Segment:

	Years Ended December 31,
	2010		2009		$ Change			% Change
Real Estate Rental Revenue
Same-store	$	40,567	$	39,507	$	1,060			2.7	%
Non-same-store (1)		8,032		6,963		1,069			15.4	%
Total	$	48,599	$	46,470	$	2,129			4.6	%
Real Estate Expenses
Same-store	$	15,868	$	15,887	$	(19	)		(0.1	%)
Non-same-store (1)		3,375		3,607		(232	)		(6.4	%)
Total real estate expenses	$	19,243	$	19,494	$	(251	)		(1.3	%)
NOI
Same-store	$	24,699	$	23,620	$	1,079			4.6	%
Non-same-store (1)		4,657		3,356		1,301			38.8	%
Total NOI	$	29,356	$	26,976	$	2,380			8.8	%

Occupancy	2010			2009
Same-store		96.3	%		94.5	%
Non-same-store (1)		91.9	%		93.6	%
Total		95.7	%		94.4	%

⁽¹⁾ Non-same-store properties include:

Development properties – Clayborne Apartments and Bennett Park

Real estate rental revenue in the multifamily segment increased by $2.1 million in 2010 as compared to 2009 due primarily to higher occupancy ($0.8 million) and lower rent abatements ($0.2 million) in our same-store properties, as well as the lease-up of our development properties ($1.1 million).

Real estate expenses in the multifamily segment decreased by $0.3 million in 2010 as compared to 2009 due primarily to lower real estate tax assessments at our development properties.

Same-store occupancy increased to 96.3% in 2010 from 94.5% in 2009, driven by higher occupancy at our two Washington, DC properties, the Kenmore and 3801 Connecticut Avenue. These were partially offset by lower occupancy at Munson Hill Towers and the Ashby at McLean. Non-same-store occupancy decreased to 91.9% from 93.6%, reflecting lower occupancy at Bennett Park.

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Industrial Segment:

	Years Ended December 31,
	2010		2009		$ Change			% Change
Real Estate Rental Revenue
Total	$	32,190	$	34,288	$	(2,098	)		(6.1	%)
Real Estate Expenses
Total	$	9,334	$	9,384	$	(50	)		(0.5	%)
NOI
Total	$	22,856	$	24,904	$	(2,048	)		(8.2	%)

Occupancy	2010			2009
Total		78.6	%		84.8	%

Real estate rental revenue in the industrial segment decreased by $2.1 million in 2010 as compared to 2009 due primarily to lower occupancy ($2.3 million) and lower recoveries from tenants ($1.2 million), partially offset by higher rental rates ($0.6 million) and lower bad debt ($0.7 million). The decrease in recoveries from tenants is primarily attributable to lower occupancy and lower real estate taxes.

Real estate expenses in the industrial segment decreased slightly in 2010 as compared to 2009 as lower real estate taxes ($0.6 million) were offset by higher snow removal costs ($0.3 million) and higher legal costs ($0.1 million).

Occupancy decreased to 78.6% in 2010 from 84.8% in 2009, driven by higher vacancy at NVIP I & II, Dulles Business Park, Fullerton Business Center and Fullerton Industrial Center. This decline in occupancy continues a trend that began during the national economic recession in 2008. During 2010, 53.9% of the square footage that expired was renewed compared to 81.3% in 2009, excluding properties sold or classified as held for sale. During 2010, we executed new leases for 587,600 square feet of industrial space at an average rental rate of $11.53, an increase of 12.6% from 2009, with average tenant improvements and leasing costs of $4.19 per square foot.

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2009 Compared to 2008

The following tables of selected operating data provide the basis for our discussion of NOI in 2009 compared to 2008. All amounts are in thousands except percentage amounts.

	Years Ended December 31,
	2009			2008			$ Change			% Change
Real Estate Rental Revenue
Same-store	$	260,887		$	258,799		$	2,088			0.8	%
Non-same-store (1)		37,274			9,910			27,364			276.1	%
Total real estate rental revenue	$	298,161		$	268,709		$	29,452			11.0	%
Real Estate Expenses
Same-store	$	86,778		$	83,938		$	2,840			3.4	%
Non-same-store (1)		14,526			6,284			8,242			131.2	%
Total real estate expenses	$	101,304		$	90,222		$	11,082			12.3	%
NOI
Same-store	$	174,109		$	174,861		$	(752	)		(0.4	%)
Non-same-store (1)		22,748			3,626			19,122			527.4	%
Total NOI	$	196,857		$	178,487		$	18,370			10.3	%
Reconciliation to Net Income
NOI	$	196,857		$	178,487
Other income (expense)		417			1,073
Income from non-disposal activities		73			17
Interest expense		(74,074	)		(74,095	)
Depreciation and amortization		(91,668	)		(82,982	)
General and administrative expenses		(13,118	)		(12,110	)
Gain (loss) on extinguishment of debt		5,336			(5,583	)
Discontinued operations(2)		3,777			7,211
Gain on sale of real estate		13,348			15,275
Net income		40,948			27,293
Less: Net income attributable to noncontrolling interests		(203	)		(211	)
Net income attributable to the controlling interests	$	40,745		$	27,082

Occupancy	2009			2008
Same-store		90.6	%		92.7	%
Non-same-store (1)		87.8	%		86.2	%
Total		90.3	%		92.1	%

⁽¹⁾ Non-same-store properties include:

Multifamily development properties – Clayborne Apartments and Bennett Park

Office development property – Dulles Station, Phase I

2009 Medical Office acquisition – Lansdowne Medical Office Building

2008 Office acquisition – 2445 M Street

2008 Medical Office acquisition – Sterling Medical Office Building

2008 Multifamily acquisition – Kenmore Apartments

2008 Industrial acquisition – 6100 Columbia Park Road

⁽²⁾ Discontinued operations include gain on disposals and income from operations for:

2010 dispositions –	Parklawn Plaza, Lexington Building, Saratoga Building, Charleston Business Center, the Ridges, Ammendale I&II and Amvax
2009 dispositions –	Avondale, Tech 100 Industrial Park, Brandywine Center and Crossroads Distribution Center
2008 dispositions –	Sullyfield Center and The Earhart Building

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Real estate rental revenue increased by $29.5 million in 2009 as compared to 2008 due primarily to the acquisition or placing into service of one office property, two medical office properties, three multifamily properties and one industrial property in 2009 and 2008, which added approximately 1.3 million square feet of net rentable space. These acquisition and development properties contributed $27.4 million of the increase. Real estate rental revenue from the same-store properties increased by $2.1 million primarily due to higher rental rates ($4.9 million), higher lease termination fees ($1.2 million) and higher reimbursements for real estate taxes ($0.4 million) and utilities ($0.7 million), partially offset by lower same-store occupancy ($3.4 million) and higher bad debt ($2.0 million) in the commercial segments.

Real estate expenses increased by $11.1 million in 2009 as compared to 2008 due primarily to acquisition and development properties, which contributed $8.2 million of the increase. Real estate expenses from same-store properties increased by $2.8 million due primarily to higher real estate taxes ($1.3 million) caused by increased rates and assessments across the portfolio, higher snow removal costs ($1.3 million, not including any tenant reimbursements) caused by a severe snow storm in December 2009 and higher electricity costs ($0.5 million) caused by increased rates, partially offset by lower administrative expenses ($0.4 million).

Same-store occupancy decreased to 90.6% in 2009 from 92.7% in 2008, with the most severe decreases in the industrial and office segments. We believe this weakness in same-store occupancy was reflective of the national economic recession. Non-same-store occupancy increased to 87.8% in 2009 from 86.2% in 2008, reflecting the completion of lease-up for our development properties in the office and multifamily segments. During 2009, 68.2% of the commercial square footage expiring was renewed as compared to 63.5% in 2008, excluding properties sold or classified as held for sale. During 2009, 1.4 million commercial square feet were leased at an average rental rate of $24.92 per square foot, an increase of 10.2%, with average tenant improvements and leasing costs of $13.95 per square foot. These leasing statistics exclude first generation leases at development properties.

An analysis of NOI by segment follows.

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Office Segment:

	Years Ended December 31,
	2009		2008		$ Change			% Change
Real Estate Rental Revenue
Same-store	$	109,158	$	108,823	$	335			0.3	%
Non-same-store (1)		21,513		2,608		18,905			724.9	%
Total real estate rental revenue	$	130,671	$	111,431	$	19,241			17.3	%
Real Estate Expenses
Same-store	$	39,092	$	38,555	$	537			1.4	%
Non-same-store (1)		7,436		1,471		5,965			405.5	%
Total real estate expenses	$	46,528	$	40,026	$	6,502			16.2	%
NOI
Same-store	$	70,066	$	70,268	$	(202	)		(0.3	%)
Non-same-store (1)		14,077		1,137		12,940			1,138.1	%
Total NOI	$	84,143	$	71,405	$	12,738			17.8	%

Occupancy	2009			2008
Same-store		90.8	%		91.3	%
Non-same-store (1)		96.0	%		94.9	%
Total		91.4	%		91.8	%

⁽¹⁾ Non-same-store properties include:

Development property – Dulles Station, Phase I

2008 acquisition – 2445 M Street

Real estate rental revenue in the office segment increased by $19.2 million in 2009 as compared to 2008 due to acquisition and development properties, which contributed $18.9 million of the increase. Real estate rental revenue from same-store properties increased by $0.3 million primarily due to higher rental rates ($3.5 million), offset by lower occupancy ($1.7 million) and higher bad debt ($1.5 million).

Real estate expenses in the office segment increased by $6.5 million in 2009 as compared to 2008 due primarily to acquisition and development properties, which contributed $6.0 million of the increase. Real estate expenses from same-store properties increased by $0.5 million primarily due to higher electricity costs ($0.3 million) caused by higher rates, higher snow removal costs ($0.2 million, not including any tenant reimbursements) caused by a severe snow storm in December 2009, and higher real estate taxes ($0.2 million) caused by higher rates and assessments. These were offset by lower property management payroll expense ($0.2 million) due to the elimination of several positions.

Same-store occupancy decreased to 90.8% in 2009 from 91.3% in 2008, primarily caused by higher vacancy at 6565 Arlington Boulevard and the Atrium Building. These were partially offset by higher occupancy at One Central Plaza and 51 Monroe Street. Non-same-store occupancy increased to 96.0% from 94.9%, reflecting lease-up of Dulles Station, Phase I, a development property. During 2009, 61.9% of the square footage that expired was renewed compared to 42.4% in 2008, excluding properties sold or classified as held for sale. During 2009, we executed new leases for 683,800 square feet of office space at an average rental rate of $31.14 per square foot, an increase of 11.6%, with average tenant improvements and leasing costs of $20.14 per square foot. These leasing statistics exclude first generation leases at the development property, Dulles Station, Phase I.

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Medical Office Segment:

	Years Ended December 31,
	2009		2008		$ Change			% Change
Real Estate Rental Revenue
Same-store	$	44,251	$	43,210	$	1,041			2.4	%
Non-same-store (1)		660		384		276			71.9	%
Total real estate rental revenue	$	44,911	$	43,594	$	1,317			3.0	%
Real Estate Expenses
Same-store	$	14,674	$	13,924	$	750			5.4	%
Non-same-store (1)		544		253		291			115.0	%
Total real estate expenses	$	15,218	$	14,177	$	1,041			7.3	%
NOI
Same-store	$	29,577	$	29,286	$	291			1.0	%
Non-same-store (1)		116		131		(15	)		(11.5	%)
Total NOI	$	29,693	$	29,417	$	276			0.9	%

Occupancy	2009			2008
Same-store		95.0	%		94.9	%
Non-same-store (1)		19.8	%		62.9	%
Total		87.9	%		94.0	%

⁽¹⁾ Non-same-store properties include:

2009 acquisition – Lansdowne Medical Office Building

2008 acquisition – Sterling Medical Office Building

Real estate rental revenue in the medical office segment increased by $1.3 million in 2009 as compared to 2008 due primarily to higher rental rates ($1.0 million) and lower bad debt ($0.3 million) on the same-store properties, offset by higher same-store vacancy ($0.2 million). The 2008 acquisition of Sterling Medical Office Building contributed $0.3 million to the increase.

Real estate expenses in the medical office segment increased by $1.0 million in 2009 as compared to 2008 due primarily to higher real estate taxes ($0.3 million) caused by higher rates and assessments on the same-store portfolio, an increase to our reserve for straight-line receivables ($0.2 million) and higher snow removal costs ($0.2 million, not including any tenant reimbursements). The acquisition properties contributed $0.3 million to the increase.

Same-store occupancy increased to 95.0% in 2009 from 94.9% in 2008, driven by higher occupancy at 8505 Arlington Boulevard, offset by lower occupancy at Ashburn Farm Office Park. Non-same-store occupancy decreased to 19.8% from 62.9% due to the acquisition of the vacant Lansdowne Medical Office Building during the third quarter of 2009. This building was unleased at the end of 2009. During 2009, 64.4% of the square footage that expired was renewed compared to 63.6% in 2008. During 2009, we executed new leases for 139,600 square feet of medical office space at an average rental rate of $36.80, an increase of 15.9%, with average tenant improvements and leasing costs of $24.28 per square foot.

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Retail Segment:

	Years Ended December 31,
	2009		2008		$ Change			% Change
Real Estate Rental Revenue
Total	$	41,821	$	40,987	$	834			2.0	%
Real Estate Expenses
Total	$	10,680	$	9,647	$	1,033			10.7	%
NOI
Total	$	31,141	$	31,340	$	(199	)		(0.6	%)

Occupancy	2009			2008
Total		93.6	%		95.2	%

Real estate rental revenue in the retail segment increased by $0.8 million in 2009 as compared to 2008 due to higher rental rates ($0.4 million), higher lease termination fees ($0.3 million) and higher real estate tax ($0.3 million) and common area maintenance ($0.3 million) reimbursements, offset by higher bad debt ($0.7 million).

Real estate expenses in the retail segment increased by $1.0 million in 2009 as compared to 2008 due to higher legal fees ($0.5 million) related to litigation concerning the remediation of an environmental condition at Westminster Shopping Center and higher real estate taxes ($0.4 million) caused by higher rates and assessments.

Occupancy decreased to 93.6% in 2009 from 95.2% in 2008, driven by higher vacancy at the Centre at Hagerstown. During 2009, 52.2% of the square footage that expired was renewed compared to 91.5% in 2008. During 2009, we executed new leases for 145,900 square feet of retail space at an average rental rate of $17.60, a decrease of 0.4%, with average tenant improvements and leasing costs of $9.08 per square foot.

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Multifamily Segment:

	Years Ended December 31,
	2009		2008		$ Change		% Change
Real Estate Rental Revenue
Same-store	$	32,909	$	32,199	$	710		2.2	%
Non-same-store (1)		13,561		5,659		7,902		139.6	%
Total real estate rental revenue	$	46,470	$	37,858	$	8,612		22.7	%
Real Estate Expenses
Same-store	$	13,382	$	13,315	$	67		0.5	%
Non-same-store (1)		6,112		4,121		1,991		48.3	%
Total real estate expenses	$	19,494	$	17,436	$	2,058		11.8	%
NOI
Same-store	$	19,527	$	18,884	$	643		3.4	%
Non-same-store (1)		7,449		1,538		5,911		384.3	%
Total NOI	$	26,976	$	20,422	$	6,554		32.1	%

Occupancy	2009			2008
Same-store		94.9	%		94.0	%
Non-same-store (1)		92.9	%		76.5	%
Total		94.4	%		89.5	%

⁽¹⁾ Non-same-store properties include:

Development properties – Clayborne Apartments and Bennett Park

2008 acquisition – Kenmore Apartments

Real estate rental revenue in the multifamily segment increased by $8.6 million in 2009 as compared to 2008 due primarily to acquisition and development properties, which contributed $7.9 million of the increase. Real estate rental revenue from same-store properties increased by $0.7 million due primarily to lower rent abatements ($0.3 million) and higher utilities reimbursements ($0.3 million).

Real estate expenses in the multifamily segment increased by $2.1 million in 2009 as compared to 2008 due primarily to acquisition and development properties, which contributed $2.0 million of the increase. Real estate expenses from same-store properties increased by $0.1 million primarily due to higher snow removal costs, not including any tenant reimbursements, due to a severe snow storm in December 2009.

Same-store occupancy increased to 94.9% in 2009 from 94.0% in 2008, driven by higher occupancy at Munson Hill Towers. Non-same-store occupancy increased to 92.9% from 76.5%, reflecting the lease-up of Bennett Park and Clayborne Apartments.

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Industrial Segment:

	Years Ended December 31,
	2009		2008		$ Change			% Change
Real Estate Rental Revenue
Same-store	$	32,748	$	33,580	$	(832	)		(2.5	%)
Non-same-store (1)		1,540		1,259		281			22.3	%
Total real estate rental revenue	$	34,288	$	34,839	$	(551	)		(1.6	%)
Real Estate Expenses
Same-store	$	8,950	$	8,497	$	453			5.3	%
Non-same-store (1)		434		439		(5	)		(1.1	%)
Total real estate expenses	$	9,384	$	8,936	$	448			5.0	%
NOI
Same-store	$	23,798	$	25,083	$	(1,285	)		(5.1	%)
Non-same-store (1)		1,106		820		286			34.9	%
Total NOI	$	24,904	$	25,903	$	(999	)		(3.9	%)

Occupancy	2009			2008
Same-store		84.0	%		91.0	%
Non-same-store (1)		100.0	%		100.0	%
Total		84.8	%		91.4	%

⁽¹⁾ Non-same-store properties include:

2008 acquisition – 6100 Columbia Park Road

Real estate rental revenue in the industrial segment decreased by $0.6 million in 2009 as compared to 2008 due primarily to lower same-store occupancy ($1.3 million) and higher bad debt ($0.2 million), offset by higher lease termination fees ($0.4 million) and higher reimbursements ($0.3 million) for common area maintenance. The 2008 acquisition of 6100 Columbia Park Road contributed $0.3 million of additional real estate revenue.

Real estate expenses in the industrial segment increased by $0.4 million in 2009 as compared to 2008 due primarily to higher snow removal costs ($0.5 million, not including any tenant reimbursements) caused by a severe snow storm in December 2009 and higher real estate taxes ($0.2 million) caused by higher rates and assessments. These were offset by higher recoveries of previously reserved bad debt ($0.2 million).

Same-store occupancy decreased to 84.0% in 2009 from 91.0% in 2008, driven by lower occupancy at NVIP I & II, Fullerton Business Center and Albemarle Point. Non-same-store occupancy was 100.0% for both years, reflecting full occupancy at 6100 Columbia Park Road. During 2009, 81.3% of the square footage that expired was renewed compared to 64.1% in 2008, excluding properties sold or classified as held for sale. During 2009, we executed new leases for 453,400 square feet of industrial space at an average rental rate of $8.80, an increase of 3.2%, with average tenant improvements and leasing costs of $3.01 per square foot.

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Liquidity and Capital Resources

Capital Structure

We manage our capital structure to reflect a long-term investment approach, generally seeking to match the cash flow of our assets with a mix of equity and various debt instruments. We expect that our capital structure will allow us to obtain additional capital from diverse sources that could include additional equity offerings of common shares, public and private secured and unsecured debt financings, and possible asset dispositions. Our ability to raise funds through the sale of debt and equity securities is dependent on, among other things, general economic conditions, general market conditions for REITs, our operating performance, our debt rating and the current trading price of our common shares. We analyze which source of capital we believe to be most advantageous to us at any particular point in time. However, the capital markets may not consistently be available on terms that we consider attractive. While we have seen increased investor appetite for securities issued by REIT’s, we have learned from the recent economic downturn that investor appetite can change dramatically in a very short period of time. As a result, there can be no assurance that we will be able to access the public or private debt and equity markets at a given point in the future.

We currently expect that our potential sources of liquidity for acquisitions, development, expansion and renovation of properties, and operating and administrative expenses, may include:

• Cash flow from operations;

• Borrowings under our unsecured credit facilities or other short-term facilities;

• Issuances of our equity securities and/or common units in our operating partnership;

• Proceeds from long-term secured or unsecured debt financings;

• Investment from joint venture partners; and

• Net proceeds from the sale of assets.

During 2011, we expect that we will have significant capital requirements, including the following items. There can be no assurance that our capital requirements will not be materially higher or lower than these expectations.

• Funding dividends on our common shares and noncontrolling interest distributions to third party unit holders;

• Capital to refinance the $105.9 million of remaining 2011 maturities on our mortgage notes payable and unsecured notes payable;

• Capital to refinance our $262.0 million unsecured line of credit which expires in 2011;

• Approximately $35.0 - $45.0 million to invest in our existing portfolio of operating assets, including approximately $20.0 - $25.0 million to fund tenant-related capital requirements and leasing commissions;

• Approximately $1.0 million to fund first generation tenant-related capital requirements and leasing commissions;

• Approximately $1.0 - $5.0 million to invest in our development projects; and

• Approximately $127.3 million to fund our known property acquisitions;

• Funding for potential property acquisitions throughout the remainder of 2011, with a portion expected to be offset by proceeds from potential property dispositions.

We currently believe that we will generate sufficient cash flow from operations and have access to the capital resources necessary to fund our requirements in 2011. However, as a result of general market conditions in the greater Washington metro region, economic downturns affecting the ability to attract and retain tenants, unfavorable fluctuations in interest rates or our share price, unfavorable changes in the supply of competing properties, or our properties not performing as expected, we may not generate sufficient cash flow from operations or otherwise have access to capital on favorable terms, or at all. If we are unable to obtain capital from other sources, we may need to alter capital spending needs which may limit growth. If capital were not available, we may not be able to pay the dividend required to maintain our status as a REIT, make required principal and interest payments, make strategic acquisitions or make necessary routine capital improvements or undertake re-development opportunities with respect to our existing portfolio of operating assets.

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Debt Financing

We generally use secured or unsecured, corporate-level debt, including mortgages, unsecured notes and our unsecured credit facilities, to meet our borrowing needs. Long-term, we generally use fixed rate debt instruments in order to match the returns from our real estate assets. We also utilize variable rate debt for short-term financing purposes. At times, our mix of variable and fixed rate debt may not suit our needs. At those times, we may use derivative financial instruments including interest rate swaps and caps, forward interest rate options or interest rate options in order to assist us in managing our debt mix. We may either hedge our variable rate debt to give it an effective fixed interest rate or hedge fixed rate debt to give it an effective variable interest rate.

Our total debt at December 31, 2010 and 2009 is summarized as follows (in thousands):

	2010		2009
Fixed rate mortgages(1)	$	380,171	$	383,563
Unsecured credit facilities		100,000		128,000
Unsecured notes payable		753,587		688,912
	$	1,233,758	$	1,200,475

⁽¹⁾ A mortgage note payable secured by the Ridges with a balance of $21.9 million was included in “Other liabilities related to properties sold or held for sale” at December 31, 2009. This mortgage note payable was paid off during the third quarter of 2010.

If principal amounts due at maturity cannot be refinanced, extended or paid with proceeds of other capital transactions, such as new equity capital, our cash flow may be insufficient to repay all maturing debt. Prevailing interest rates or other factors at the time of a refinancing, such as possible reluctance of lenders to make commercial real estate loans, may result in higher interest rates and increased interest expense or inhibit our ability to finance our obligations.

Mortgage Debt

At December 31, 2010, our $380.2 million in fixed rate mortgages, which includes a net $6.7 million in unamortized discounts due to fair value adjustments, bore an effective weighted average fair value interest rate of 5.9% and had a weighted average maturity of 4.9 years. We may either initiate secured mortgage debt or assume mortgage debt from time-to-time in conjunction with property acquisitions.

On July 12, 2010 we repaid without penalty a $21.7 million mortgage note payable secured by the Crescent and the Ridges.

Unsecured Credit Facilities

Our primary source of liquidity is our two revolving credit facilities. We can borrow up to $337.0 million under these lines, which bear interest at an adjustable spread over LIBOR based on our public debt rating.

Credit Facility No. 1 is a four-year, $75.0 million unsecured credit facility expiring in June 2011, and may be extended for one year at our option. We had no borrowings outstanding and $0.8 million in letters of credit issued as of December 31, 2010, related to Credit Facility No. 1. Borrowings under the facility bear interest at our option of LIBOR plus a spread based on the credit rating on our publicly issued debt or the higher of SunTrust Bank’s prime rate and the Federal Funds Rate in effect plus 0.5%. The interest rate spread is currently 42.5 basis points. All outstanding advances are due and payable upon maturity in June 2011, and may be extended for one year at our option. Interest only payments are due and payable generally on a monthly basis. In addition, we pay a facility fee based on the credit rating of our publicly issued debt which currently equals 0.15% per annum of the $75.0 million committed capacity, without regard to usage. Rates and fees may be adjusted up or down based on changes in our senior unsecured credit ratings.

Credit Facility No. 2 is a four-year $262.0 million unsecured credit facility originally set to expire in November 2010. In September 2010, we exercised our one-year extension option on Credit Facility No. 2, which now expires in November 2011. We had $100.0 million outstanding and $0.9 million in letters of credit issued as of December 31, 2010, related to Credit Facility No. 2. Advances under this agreement bear interest at our option of LIBOR plus a spread based on the credit rating of our publicly issued debt or the higher of Wells Fargo Bank’s prime rate and the Federal Funds Rate in effect on that day plus 0.5%. The interest rate spread is currently 42.5 basis points. The $100.0 million outstanding balance was used to prepay the $100 million term loan, and the interest rate on this $100.0 million in borrowings is effectively fixed by interest rate swaps. An interest rate swap fixed the interest rate at 3.375% (2.95% plus the 42.5 basis

47

point spread) through February 19, 2010, the terminal date for the swap. At that point in time, a forward interest rate swap became effective on February 20, 2010. The interest rate on the $100.0 million borrowing is currently 2.525% (2.10% plus the current interest rate spread of 42.5 basis points). All outstanding advances are due and payable upon maturity in November 2011. Interest only payments are due and payable generally on a monthly basis. Credit Facility No. 2 requires us to pay the lender a facility fee on the total commitment of 0.15% per annum. These fees are payable quarterly.

We anticipate that, prior to the November 2011 expiration of Credit Facility No. 2, we will negotiate a replacement facility in the same or greater amount than the expiring facility. While we anticipate that the interest rate and facility fee of the replacement facility will be higher than the current facility, we do not expect the new terms to have a material adverse effect on our financial results.

Our unsecured credit facilities contain financial and other covenants with which we must comply. Some of these covenants include:

• A minimum tangible net worth;

• A maximum ratio of total liabilities to gross asset value, calculated using an estimate of fair market value of our assets;

• A maximum ratio of secured indebtedness to gross asset value, calculated using an estimate of fair market value of our assets;

• A minimum ratio of annual EBITDA (earnings before interest, taxes, depreciation and amortization) to fixed charges, including interest expense;

• A minimum ratio of unencumbered asset value, calculated using an estimate of fair value of our assets, to unsecured indebtedness;

• A minimum ratio of net operating income from our unencumbered properties to unsecured interest expense; and

• A maximum ratio of permitted investments to gross asset value, calculated using an estimate of fair market value of our assets.

Failure to comply with any of the covenants under our unsecured credit facilities or other debt instruments could result in a default under one or more of our debt instruments. This could cause our lenders to accelerate the timing of payments and would therefore have a material adverse effect on our business, operations, financial condition and liquidity. As of December 31, 2010, we were in compliance with our loan covenants. In addition, our ability to draw on our unsecured credit facilities or incur other unsecured debt in the future could be restricted by the loan covenants.

We anticipate that in the near term we may rely to a greater extent upon our unsecured credit facilities and potentially maintain balances on our unsecured credit facilities for longer periods than has been our historical practice. To the extent that we maintain larger balances on our unsecured credit facilities or maintain balances on our unsecured credit facilities for longer periods, adverse fluctuations in interest rates could have a material adverse effect on earnings.

Unsecured Notes

We generally issue unsecured notes to fund our real estate assets long-term. In issuing future unsecured notes, we intend to ladder the maturities of our debt to mitigate exposure to interest rate risk in future years.

Depending upon market conditions, opportunities to issue unsecured notes on attractive terms may not be available. During periods in the recent past, debt capital was essentially unavailable for extended periods of time. While debt markets have materially improved, it is difficult to predict if the improvement is sustainable.

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Our unsecured notes have maturities ranging from June 2011 through February 2028, as follows (in thousands):

	December 31, 2010 Note Principal
5.95% notes due 2011		$ 93,862
5.05% notes due 2012		50,000
5.125% notes due 2013		60,000
5.25% notes due 2014		100,000
5.35% notes due 2015		150,000
4.95% notes due 2020		250,000
3.875% notes due 2026 (1)		2,659
7.25% notes due 2028		50,000
	$	756,521

⁽¹⁾ On or after September 20, 2011, we may redeem the convertible notes at a redemption price equal to the principal amount of the notes plus any accrued and unpaid interest, if any, up to, but excluding, the purchase date. In addition, on September 15, 2011, September 15, 2016 and September 15, 2021 or following the occurrence of certain change in control transactions prior to September 15, 2011, holders of these notes may require us to repurchase the notes for an amount equal to the principal amount of the notes plus any accrued and unpaid interest thereon.

Our unsecured notes contain covenants with which we must comply. These include:

• Limits on our total indebtedness;

• Limits on our secured indebtedness;

• Limits on our required debt service payments; and

• Maintenance of a minimum level of unencumbered assets.

Failure to comply with any of the covenants under our unsecured notes could result in a default under one or more of our debt instruments. This could cause our debt holders to accelerate the timing of payments and would therefore have a material adverse effect on our business, operations, financial condition and liquidity. As of December 31, 2010, we were in compliance with our unsecured notes covenants.

During 2010, we repurchased $131.7 million of our 3.875% convertible notes at 100.1% to 102.75% of par, resulting in a net loss on extinguishment of debt of $6.8 million. We also repurchased $56.1 million of our 5.95% senior notes at 103.75% of par, resulting in a net loss on extinguishment of debt of $2.4 million. We executed these repurchases using a portion of the proceeds from our issuance of $250.0 million of 4.95% notes due in 2020.

We may from time to time seek to repurchase and cancel our outstanding notes through open market purchases, privately negotiated transactions or otherwise. Such repurchases, if any, will depend on prevailing market conditions, our liquidity requirements, contractual restrictions and other factors. The amounts involved may be material.

Common Equity

We have authorized for issuance 100.0 million common shares, of which 65.9 million shares were outstanding at December 31, 2010.

During the fourth quarter of 2009, we entered into a sales agency financing agreement with BNY Mellon Capital Markets, LLC relating to the issuance and sale of up to $250.0 million of the our common shares from time to time over a period of no more than 36 months, replacing a previous agreement made during the third quarter of 2008. Sales of our common shares are made at market prices prevailing at the time of sale. Net proceeds for the sale of common shares under this program are used for the repayment of borrowings under our lines of credit, acquisitions, and general corporate purposes. During 2010, we issued 5.6 million common shares at a weighted average price of $30.34 under this program, raising $168.9 million in net proceeds.

We have a dividend reinvestment program, whereby shareholders may use their dividends and optional cash payments to purchase common shares. The common shares sold under this program may either be common shares issued by us or common shares purchased in the open market. We used the net proceeds under this program for general corporate purposes. During 2010, we issued 0.2 million common shares at a weighted average price of $30.36 per share, raising $5.3 million in net proceeds.

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Dividends

We pay dividends quarterly. The maintenance of these dividends is subject to various factors, including the discretion of our Board of Trustees, our results of operations, the ability to pay dividends under Maryland law, the availability of cash to make the necessary dividend payments and the effect of REIT distribution requirements, which require at least 90% of our taxable income to be distributed to shareholders. The table below details our dividend and distribution payments for 2010, 2009 and 2008 (in thousands):

	2010		2009		2008
Common dividends	$	108,949	$	100,221	$	85,564
Noncontrolling interest distributions		163		190		192
	$	109,112	$	100,411	$	85,756

Dividends paid for 2010 as compared to 2009 increased primarily due to our issuance of 5.6 million shares under our sales agency financing agreement during 2010.

Dividends paid for 2009 as compared to 2008 increased as a direct result of a dividend rate increase from $1.72 per share in 2008 to $1.73 per share in 2009. The dividends paid also increased due to our issuance of 5.25 million shares pursuant to a public offering and our issuance of 2.0 million under our sales agency financing agreement during 2009.

Cash flows from operations are an important factor in our ability to sustain our dividend at its current rate. Cash flows from operations increased to $111.9 million in 2010 from $102.9 million in 2009, primarily due to lower interest payments. If our cash flows from operations were to decline significantly, we may have to borrow on our lines of credit to sustain the dividend rate or reduce our dividend.

Capital Commitments

We will require capital for development and redevelopment projects currently underway and in the future. As of December 31, 2010, we had under development Dulles Station Phase II and 4661 Kenmore, in which we had invested $27.8 million and $5.5 million, respectively. We are also evaluating a number of potential redevelopment projects at properties such as Montgomery Village Center, Montrose Shopping Center and 7900 Westpark. There were no projects placed into service in 2010.

We anticipate funding several major renovation projects in our portfolios during 2011, as follows (in thousands):

Segment	Project Spending
Office buildings	$	8,037
Medical office buildings		1,665
Retail centers		350
Multifamily		3,988
Industrial		—
Total	$	14,040

These projects include a new heating and air conditioning system at one of our multifamily properties, sprinkler system, heating and air conditioning and common area upgrades at several of our office and medical properties and an installation of an automated parking system at one of our retail properties. Not all of the anticipated spending had been committed via executed construction contracts at December 31, 2010. We expect to meet our requirements using cash generated by our real estate operations, through borrowings on our unsecured credit facilities, or raising additional debt or equity capital in the public market.

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Contractual Obligations

Below is a summary of certain contractual obligations that will require significant capital (in thousands):

	Payments due by Period
	Total		Less than 1 year		1-3 years		4-5 years		After 5 years
Long-term debt (1)	$	1,602,779	$	270,276	$	480,793	$	312,388	$	539,322
Purchase obligations (2)		8,698		7,109		1,589		—		—
Estimated development commitments (3)		—		—		—		—		—
Tenant-related capital (4)		8,685		6,517		2,168		—		—
Building capital (5)		4,772		4,772		—		—		—
Operating leases		115		48		58		9		—

⁽¹⁾ See Notes 4, 5 and 6 of our consolidated financial statements. Amounts include principal, interest, unused commitment fees and facility fees.

⁽²⁾ Represents elevator maintenance contracts with terms through 2011, electricity sales agreements with terms through 2012, and natural gas purchase agreements with terms through 2011.

⁽³⁾ Committed development obligations based on contracts in place as of December 31, 2010.

⁽⁴⁾ Committed tenant-related capital based on executed leases as of December 31, 2010.

⁽⁵⁾ Committed building capital additions based on contracts in place as of December 31, 2010.

We have various standing or renewable contracts with vendors. The majority of these contracts are cancelable with immaterial or no cancellation penalties, with the exception of our elevator maintenance, electricity sales and natural gas purchase agreements, which are included above on the purchase obligations line. Contract terms on cancelable leases are generally one year or less. We are currently committed to fund tenant-related capital improvements as described in the table above for executed leases. However, expected leasing levels could require additional tenant-related capital improvements which are not currently committed. We expect that total tenant-related capital improvements, including those already committed, will be approximately $15.7 million in 2011. Due to the competitive office leasing market we expect that tenant-related capital costs will continue at this level into 2012.

Historical Cash Flows

Consolidated cash flow information is summarized as follows (in millions):

	For the year ended December 31,									Variance
	2010			2009			2008			2010 vs. 2009			2009 vs. 2008
Cash provided by operating activities	$	111.9		$	102.9		$	97.1		$	9.0		$	5.8
Cash used in investing activities	$	(111.1	)	$	(12.8	)	$	(181.4	)	$	(98.3	)	$	168.6
Cash provided by (used in) financing activities	$	66.8		$	(90.8	)	$	74.7		$	157.6		$	(165.5	)

Operations generated $111.9 million of net cash in 2010 compared to $102.9 million in 2009. The increase in cash provided by operating activities in 2010 as compared to 2009 was primarily due to lower interest payments.

Operations generated $102.9 million of net cash in 2009 compared to $97.1 million in 2008. The increase in cash provided by operating activities in 2009 as compared to 2008 was primarily due to higher income from real estate operations.

Our investing activities used net cash of $111.1 million in 2010 and $12.8 million in 2009. The increase in cash used by investing activities in 2010 was primarily due to the increase in cash invested in acquisitions, net of assumed debt, throughout 2010, which was $136.1 million higher than 2009.

Our investing activities used net cash of $12.8 million in 2009 and $181.4 million in 2008. The decrease in cash used by investing activities in 2009 was primarily due to the decrease in cash invested in acquisitions, net of assumed debt, throughout 2009, which was $148.4 million lower than 2008.

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Our financing activities generated $66.8 million of net cash in 2010 and used $90.8 million in 2009. The net increase in net cash provided by financing activities in 2010 was primarily the result of the proceeds from our debt offering and equity issued under our sales agency financing agreement.

Our financing activities used net cash of $90.8 million in 2009 and provided $74.7 million in 2008. The net increase in net cash used by financing activities in 2009 was primarily the result of using cash from operations and the proceeds from equity issuances, property sales and a new mortgage note to pay dividends, repurchase convertible notes and prepay a mortgage note.

Capital Improvements and Development Costs

Capital improvements and development costs of $26.4 million were completed in 2010, including tenant improvements. These improvements to our properties in 2009 and 2008 were $29.5 million and $52.8 million, respectively. We consider capital improvements to be accretive to revenue and not necessarily to net income.

Our capital improvement and development costs for the three years ending December 31, 2010 were as follows (in thousands):

	Year Ended December 31,
	2010		2009		2008
Accretive capital improvements:
Acquisition related	$	1,007	$	2,696	$	6,012
Expansions and major renovations		3,180		5,557		9,591
Development/redevelopment		1,337		2,135		15,509
Tenant improvements (including first generation leases)		15,162		12,874		11,359
Total accretive capital improvements		20,686		23,262		42,471
Other capital improvements:		5,696		6,210		10,310
Total	$	26,382	$	29,472	$	52,781

Accretive Capital Improvements

Acquisition Related Improvements: Acquisition related improvements are capital improvements to properties acquired during the preceding three years which were anticipated at the time we acquired the properties. These types of improvements were made in 2010 to 2445 M Street, 2440 M Street, 2000 M Street, Sterling Medical and Lansdowne Medical.

Expansions and Major Renovations: Expansion projects increase the rentable area of a property, while major renovation projects are improvements sufficient to increase the income otherwise achievable at a property. 2010 expansions and major renovations included garage renovations at One Central Plaza; elevator and lobby modernization at Alexandria Professional Center; and roof replacement at 2000 M Street.

Development/Re-development: Development costs represent expenditures for ground up development of new operating properties. Re-development costs represent expenditures for improvements intended to re-position properties in their markets and increase income that would be otherwise achievable. Development costs in each of the years presented include costs associated with the ground up development of Dulles Station, Bennett Park and the medical office space at 4661 Kenmore Avenue.

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Tenant Improvements: Tenant improvements are costs, such as space build-out, associated with commercial lease transactions. Our average Tenant improvement costs per square foot of space leased, excluding first generation leases, were as follows during the three years ended December 31, 2010:

	Year Ended December 31,
		2010		2009		2008
Office Buildings*	$	19.95	$	11.60	$	13.15
Medical Office Buildings	$	16.24	$	13.87	$	19.12
Retail Centers	$	3.23	$	3.91	$	3.61
Industrial/Flex Properties*	$	1.45	$	0.30	$	1.68

* Excludes properties sold or classified as held for sale.

The $8.35 increase in tenant improvement costs per square foot of space leased for office buildings in 2010 was primarily due to leases executed with single tenants in 2010 requiring $5.4 million in tenant improvements at Monument II, 2000 M Street, 7900 Westpark and 1600 Wilson Boulevard. The $1.55 decrease in tenant improvement costs per square foot of space leased for office buildings in 2009 was primarily due to a decrease in the per square foot costs associated with expansion leases and leases executed with a single tenant in 2008 requiring $1.1 million in tenant improvements. The $2.37 increase in 2010 and $5.25 decrease in 2009 in tenant improvement costs per square foot of space leased for medical office buildings was primarily due to single tenant leases executed in 2010 at Shady Grove Medical requiring $1.3 million in tenant improvements and $1.7 million in single tenant improvements required for leases executed in 2008 at Woodburn II and 8503 Arlington Boulevard. The $0.68 decrease in tenant improvement costs per square foot of retail space leased in 2010 and the $0.30 increase in tenant improvement costs per square foot of retail space leased in 2009 was primarily due to a single tenant lease executed at the Centre at Hagerstown in 2009 requiring $0.7 million in tenant improvements. The $1.15 increase in tenant improvement costs per square foot of industrial space leased in 2010 was primarily due to single tenant leases executed in 2010 at Fullerton Business, NVIP and 8900 Telegraph Road requiring $0.5 million in tenant improvements. The $1.38 decrease in tenant improvement costs per square foot of industrial space leased in 2009 was primarily due to single tenant leases executed in 2008 at Pickett, Douglas Business Park and Albemarle requiring $0.5 million in tenant improvements. The retail and industrial tenant improvement costs are substantially lower than office and medical office improvement costs due to the tenant improvements required in these property types being substantially less extensive than in office and medical.

Excluding properties sold or classified as held for sale, approximately 59% of our tenants renewed their leases with us in 2010, compared to 69% in 2009 and 63% in 2008. Renewing tenants generally require minimal tenant improvements. In addition, lower tenant improvement costs are one of the many benefits of our focus on leasing to smaller office tenants. Smaller office suites have limited configuration alternatives. Therefore, we are often able to lease an existing suite with limited tenant improvements.

Other Capital Improvements

Other capital improvements are those not included in the above categories. These are also referred to as recurring capital improvements. Over time these costs will be recurring in nature to maintain a property’s income and value. In our multifamily properties, these include new appliances, flooring, cabinets and bathroom fixtures. These improvements, which are made as needed upon vacancy of an apartment, totaled $0.7 million in 2010, and averaged $738 per apartment for the 39% of apartments turned over relative to our total portfolio of apartment units. In our commercial properties and multifamily properties aside from apartment turnover discussed above, improvements include asphalt replacement, new signage, permanent landscaping, window replacements, new lighting and new finishes. In addition, during 2010, we incurred repair and maintenance expenses of $12.5 million that were not capitalized, to maintain the quality of our buildings.

Forward-Looking Statements

This Form 10-K contains forward-looking statements which involve risks and uncertainties. Such forward looking statements include each of the statements in “Item 1: Business” and “Item 7: Management’s Discussion and Analysis of Financial Conditions and Results of Operations” concerning the Washington metro region’s economy, gross regional product, unemployment and job growth and real estate market performance. Such forward-looking statements also include the following statements with respect to WRIT: (a) our intention to invest in properties that we believe will increase in income and value; (b) our belief that external sources of capital will continue to be available and that additional sources of capital will be available from the sale of common shares or notes; and (c) our belief that we have the liquidity and capital resources necessary to meet our known obligations and to make additional property acquisitions

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and capital improvements when appropriate to enhance long-term growth. Forward-looking statements also include other statements in this report preceded by, followed by or that include the words “believe,” “expect,” “intend,” “anticipate,” “potential,” “project,” “will” and other similar expressions.

We claim the protection of the safe harbor for forward-looking statements contained in the Private Securities Litigation Reform Act of 1995 for the foregoing statements. The following important factors, in addition to those discussed elsewhere in this Form 10-K, could affect our future results and could cause those results to differ materially from those expressed in the forward-looking statements: (a) the effect of the recent credit and financial market conditions; (b) the availability and cost of capital; (c) fluctuations in interest rates; (d) the economic health of our tenants; (e) the timing and pricing of lease transactions; (f) the economic health of the greater Washington Metro region, or other markets we may enter; (g) the effects of changes in Federal government spending; (h) the supply of competing properties; (i) consumer confidence; (j) unemployment rates; (k) consumer tastes and preferences; (l) our future capital requirements; (m) inflation; (n) compliance with applicable laws, including those concerning the environment and access by persons with disabilities; (o) governmental or regulatory actions and initiatives; (p) changes in general economic and business conditions; (q) terrorist attacks or actions; (r) acts of war; (s) weather conditions; (t) the effects of changes in capital available to the technology and biotechnology sectors of the economy, and (u) other factors discussed under the caption “Risk Factors.” We undertake no obligation to update our forward-looking statements or risk factors to reflect new information, future events, or otherwise.

Ratios of Earnings to Fixed Charges and Debt Service Coverage

The following table sets forth our ratios of earnings to fixed charges and debt service coverage for the periods shown:

	Year Ended December 31,
	2010		2009		2008
Earnings to fixed charges		1.18x		1.30x		1.03x
Debt service coverage		2.60x		2.44x		2.30x

We computed the ratio of earnings to fixed charges by dividing earnings by fixed charges. For this purpose, earnings consist of income from continuing operations attributable to the controlling interests plus fixed charges, less capitalized interest. Fixed charges consist of interest expense, including amortized costs of debt issuance, and interest costs capitalized.

We computed the debt service coverage ratio by dividing EBITDA (which is earnings before interest income and expense, taxes, depreciation, amortization and gain on sale of real estate) by interest expense and principal amortization.

Funds From Operations

FFO is a widely used measure of operating performance for real estate companies. We provide FFO as a supplemental measure to net income calculated in accordance with GAAP. Although FFO is a widely used measure of operating performance for REITs, FFO does not represent net income calculated in accordance with GAAP. As such, it should not be considered an alternative to net income as an indication of our operating performance. In addition, FFO does not represent cash generated from operating activities in accordance with GAAP, nor does it represent cash available to pay distributions and should not be considered as an alternative to cash flow from operating activities, determined in accordance with GAAP, as a measure of our liquidity. The National Association of Real Estate Investment Trusts, Inc. (“NAREIT”) defines FFO (April, 2002 White Paper) as net income (computed in accordance with GAAP) excluding gains (or losses) from sales of property plus real estate depreciation and amortization. We consider FFO to be a standard supplemental measure for REITs because it facilitates an understanding of the operating performance of our properties without giving effect to real estate depreciation and amortization, which historically assumes that the value of real estate assets diminishes predictably over time. Since real estate values have instead historically risen or fallen with market conditions, we believe that FFO more accurately provides investors an indication of our ability to incur and service debt, make capital expenditures and fund other needs. Our FFO may not be comparable to FFO reported by other REITs. These other REITs may not define the term in accordance with the current NAREIT definition or may interpret the current NAREIT definition differently.

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The following table provides the calculation of our FFO and a reconciliation of FFO to net income for the years presented (in thousands):

	2010			2009			2008
Net income attributable to the controlling interests	$	37,426		$	40,745		$	27,082
Adjustments
Depreciation and amortization		93,992			91,668			82,982
Gain on sale of real estate		(21,599	)		(13,348	)		(15,275	)
Gain from non-disposal activities		(7	)		(73	)		(17	)
Discontinued operations depreciation and amortization		1,754			2,779			3,916
FFO as defined by NAREIT	$	111,566		$	121,771		$	98,688

ITEM 7A: QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

The principal material financial market risk to which we are exposed is interest rate risk. Our exposure to interest rate risk relates primarily to refinancing long-term fixed rate obligations, the opportunity cost of fixed rate obligations in a falling interest rate environment and our variable rate lines of credit. We primarily enter into debt obligations to support general corporate purposes, including acquisition of real estate properties, capital improvements and working capital needs. In the past we have used interest rate hedge agreements to hedge against rising interest rates in anticipation of imminent refinancing or new debt issuance.

The table below presents principal, interest and related weighted average fair value interest rates by year of maturity, with respect to debt outstanding on December 31, 2010.

	2011			2012			2013			2014			2015			Thereafter			Total			Fair Value
(In thousands)
Unsecured fixed rate debt
Principal	$	96,521		$	50,000		$	60,000		$	100,000		$	150,000		$	300,000		$	756,521		$	785,637
Interest payments	$	37,770		$	33,613		$	30,812		$	26,650		$	20,012		$	107,188		$	256,045
Interest rate on debt maturities		5.94	%		5.06	%		5.23	%		5.34	%		5.35	%		5.44	%		5.43	%
Unsecured variable rate debt
Principal	$	100,000	(a)		—			—			—			—			—		$	100,000		$	100,000
Variable interest rate on debt maturities (b)		2.53	%					—			—			—			—			2.53	%
Mortgages
Principal amortization (30 year schedule)	$	13,349		$	21,362		$	106,630		$	1,516		$	20,041		$	223,978		$	386,876		$	399,282
Interest payments	$	22,251		$	20,971		$	15,399		$	13,841		$	13,671		$	16,820		$	102,953
Weighted average interest rate on principal amortization		5.32	%		4.92	%		5.58	%		5.39	%		5.30	%		6.35	%		5.96	%

(a) This $100.0 million borrowing was made under a line of credit which matures in 2011 and bears interest at a variable rate, which has been effectively fixed at 2.525% through a forward interest rate swap through November 1, 2011. See note 5 to the consolidated financial statements for further discussion.

(b) Variable interest rates based on LIBOR in effect on our borrowings outstanding at December 31, 2010.

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ITEM 8:  FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

The financial statements and supplementary data appearing on pages 68 to 107 are incorporated herein by reference.

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

None.

ITEM 9A:  CONTROLS AND PROCEDURES

We maintain disclosure controls and procedures that are designed to ensure that information required to be disclosed in our Securities Exchange Act reports is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, and that such information is accumulated and communicated to our management, including our Chief Executive Officer, Chief Financial Officer and Executive Vice President – Accounting and Administration, as appropriate, to allow timely decisions regarding required disclosure. In designing and evaluating the disclosure controls and procedures, management recognized that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and management necessarily was required to apply its judgment in evaluating the cost-benefit relationship of possible controls and procedures.

We carried out an evaluation, under the supervision and with the participation of our management, including our Chief Executive Officer, Chief Financial Officer and Executive Vice President – Accounting and Administration, of the effectiveness of the design and operation of our disclosure controls and procedures as of December 31, 2010. Based on the foregoing, our Chief Executive Officer, Chief Financial Officer and Executive Vice President – Accounting and Administration concluded that our disclosure controls and procedures were effective at a reasonable assurance level.

Internal Control over Financial Reporting

See the Report of Management in Item 8 of this Form 10-K.

See the Reports of Independent Registered Public Accounting Firm in Item 8 of this Form 10-K.

During the three months ended December 31, 2010, there was no change in our internal control over financial reporting that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

ITEM 9B:  OTHER INFORMATION

None.

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PART III

Certain information required by Part III is omitted from this Form 10-K in that we will file a definitive proxy statement pursuant to Regulation 14A with respect to our 2011 Annual Meeting (the “Proxy Statement”) no later than 120 days after the end of the fiscal year covered by this Form 10-K, and certain information included therein is incorporated herein by reference. Only those sections of the Proxy Statement which specifically address the items set forth herein are incorporated by reference. In addition, we have adopted a code of ethics which can be reviewed and printed from our website www.writ.com.

ITEM 10:  DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE

The information required by this Item is hereby incorporated herein by reference to the Proxy Statement.

ITEM 11:  EXECUTIVE COMPENSATION

The information required by this Item is hereby incorporated herein by reference to the Proxy Statement.

ITEM 12:  SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS

The information required under this Item by Item 403 of Regulation S-K is hereby incorporated herein by reference to the Proxy Statement.

Equity Compensation Plan Information⁽¹⁾

Plan Category	Number of securities to be issued upon exercise of outstanding options, warrants and rights			Weighted-average  exercise price of outstanding options, warrants and rights		Number of securities  remaining available for future issuance under equity compensation plans (excluding securities reflected in column (a))
	(a)			(b)		(c)
Equity compensation plans approved by security holders		115,985			26.15		1,529,301
Equity compensation plans not approved by security holders		30,000	(2)		29.00		—
Total		145,985			26.74		1,529,301

⁽¹⁾ We previously maintained a Share Grant Plan for officers, trustees and non-officer employees, which expired on December 15, 2007. 322,325 shares and 27,675 restricted share units had been granted under this plan. We previously maintained a stock option plan for trustees which provided for the annual granting of 2,000 non-qualified stock options to trustees the last of which were granted in 2004. The plan expired on December 15, 2007, and 84,000 options had been granted. See note 7 to the consolidated financial statements for further discussion.

⁽²⁾ These securities are options issued under a Share Grant Plan for officers, trustees and non-officer employees. This plan expired on December 15, 2007 and options may no longer be issued thereunder.

ITEM 13.:  CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE

The information required by this Item is hereby incorporated herein by reference to the Proxy Statement.

ITEM 14:  PRINCIPAL ACCOUNTANT FEES AND SERVICES

The information required by this Item is hereby incorporated herein by reference to the Proxy Statement.

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PART IV

ITEM 15:  EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

(A). The following documents are filed as part of this Form 10-K:

1.	Financial Statements	Page
	Management’s Report on Internal Control Over Financial Reporting	65
	Report of Independent Registered Public Accounting Firm on Internal Control Over Financial Reporting	66
	Report of Independent Registered Public Accounting Firm	67
	Consolidated Balance Sheets as of December 31, 2010 and 2009	68
	Consolidated Statements of Income for the Years Ended December 31, 2010, 2009 and 2008	69
	Consolidated Statements of Changes in Shareholders’ Equity for the Years Ended December 31, 2010, 2009 and 2008	70
	Consolidated Statements of Cash Flows for the Years Ended December 31, 2010, 2009 and 2008	73
	Notes to Consolidated Financial Statements	74
2.	Financial Statement Schedules
	Schedule III – Consolidated Real Estate and Accumulated Depreciation	104
3.	Exhibits:

		Incorporated by Reference
Exhibit Number	Exhibit Description	Form	File Number	Exhibit	Filing Date	Filed Herewith
3.1	Declaration of Trust.	8-B	001-06622	3	7/10/1996
3.2	Amendment to Declaration of Trust dated September 21, 1998.	10-Q	001-06622	3	11/13/1998
3.3	Articles of Amendment to Declaration of Trust dated June 24, 1999.	S-3	333-81913	4(c)	7/14/1999
3.4	Articles of Amendment to Declaration of Trust dated June 1, 2006	S-3	333-136921	4(d)	8/28/2006
3.5	Amended and Restated Bylaws dated October 22, 2009	8-K	001-06622	3.1	10/27/2009
4.1	Indenture dated as of August 1, 1996 between WRIT and The First National Bank of Chicago	8-K	001-06622	(c)	8/13/1996
4.2	Form of 2028 Notes	8-K	001-06622	99.1	2/25/1998
4.3	Officer’s Certificate Establishing Terms of the 2013 Notes, dated March 12, 2003	8-K	001-06622	4(a)	3/17/2003
4.4	Form of 2013 Notes	8-K	001-06622	4(b)	3/17/2003

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		Incorporated by Reference
Exhibit Number	Exhibit Description	Form	File Number	Exhibit	Filing Date	Filed Herewith
4.5	Officers’ Certificate Establishing Terms of the 2014 Notes, dated December 8, 2003	8-K	001-06622	4(a)	12/11/2003
4.6	Form of 2014 Notes	8-K	001-06622	4(b)	12/11/2003
4.7	Form of 5.05% Senior Notes due May 1, 2012	8-K	001-06622	4.1	4/26/2005
4.8	Form of 5.35% Senior Notes due May 1, 2015 dated April 26, 2005	8-K	001-06622	4.2	4/26/2005
4.9	Officers Certificate establishing the terms of the 2012 and 2015 Notes, dated April 20, 2005	8-K	001-06622	4.3	4/26/2005
4.10	Form of 5.35% Senior Notes due May 1, 2015 dated October 6, 2005	8-K	001-06622	4.1	10/6/2005
4.11	Officers Certificate establishing the terms of the 2015 Notes, dated October 3, 2005	8-K	001-06622	4.2	10/6/2005
4.12	Form of 5.95% Senior Notes due June 15, 2011	8-K	001-06622	4.1	6/6/2006
4.13	Officers’ Certificate establishing the terms of the 2011 Notes, dated June 6, 2006	8-K	001-06622	4.2	6/6/2006
4.14	Form of 3.875% Senior Convertible Notes due September 15, 2026	424B5	333-114410		9/11/2006
4.15	Officers’ Certification establishing the terms of the Convertible Notes, dated September 11, 2006	424B5	333-114410		9/11/2006
4.16	Form of additional 3.875% Senior Convertible Notes due September 15, 2026	8-K	001-06622	4.1	9/26/2006
4.17	Form of 5.95% senior notes due June 15, 2011, dated July 21, 2006	424B5	333-114410		7/21/2006
4.18	Officers’ Certification establishing the terms of the 2011 Notes, dated July 21, 2006	424B5	333-114410		7/21/2006
4.19	Credit agreement dated November 2, 2006 between Washington Real Estate Investment Trust as borrower and a syndicate of banks as lender with The Bank of New York as documentation agent, The Royal Bank of Scotland, plc as syndication agent and Wells Fargo Bank, NA, as agent	8-K	001-06622	4.1	11/8/2006

59

		Incorporated by Reference
Exhibit Number	Exhibit Description	Form	File Number	Exhibit	Filing Date	Filed Herewith
4.20	Form of 3.875% Convertible Senior Notes due September 15, 2026	8-K	001-06622	4.1	1/23/2007
4.21	Officers’ Certificate establishing the terms of the 3.85% Convertible Senior Notes due September 15, 2026	8-K	001-06622	4.1	1/23/2007
4.22	Form of additional 3.85% Convertible Senior Notes due September 15, 2026	8-K	001-06622	4.1	2/2/2007
4.23	Supplemental Indenture by and between WRIT and the Bank of New York Trust Company, N.A. dated as of July 3, 2007	8-K	001-06622	4.1	7/5/2007
4.24	Credit agreement dated June 29, 2007 by and among WRIT, as borrower, the financial institutions party thereto as lenders, and SunTrust Bank as agent	8-K	001-06622	4.1	7/6/2007
4.25	Term Loan Agreement dated as of February 21, 2008, by and between WRIT and Wells Fargo Bank, National Association	8-K	001-06622	4.1	2/27/2008
4.26	Multifamily Note Agreement (Walker House Apartments) dated as of May 29, 2008, by and between WRIT and Wells Fargo Bank, National Association	10-Q	001-06622	4	8/8/2008
4.27	Multifamily Note Agreement (3801 Connecticut Avenue) dated as of May 29, 2008, by and between WRIT and Wells Fargo Bank, National Association	10-Q	001-06622	4	8/8/2008
4.28	Multifamily Note Agreement (Bethesda Hill Apartments) dated as of May 29, 2008, by and between WRIT and Wells Fargo Bank, National Association	10-Q	001-06622	4	8/8/2008
4.29	First Amendment to Term Loan Agreement dated as of May 7, 2009, by and between WRIT and Wells Fargo Bank, National Association	10-Q	001-06622	4(rr)	8/7/2009
4.30	Form of 4.95% Senior Notes due October 1, 2020	8-K	001-06622	4.1	9/30/2010
4.31	Officers’ Certificate establishing the terms of the 4.95% Senior Notes due October 1, 2020	8-K	001-06622	4.2	9/30/2010
10.1	Purchase and Sale Agreement dated as of June 16, 2008, for 2445 M Street, NW, Washington, DC	10-Q	001-06622	10	8/8/2008

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		Incorporated by Reference
Exhibit Number	Exhibit Description	Form	File Number	Exhibit	Filing Date	Filed Herewith
10.2*	1991 Incentive Stock Option Plan, as amended	S-3	033-60581	10(b)	7/17/1995
10.3*	Deferred Compensation Plan for Executives dated January 1, 2000	10-K	001-06622	10(g)	3/19/2001
10.4*	Split-Dollar Agreement dated April 1, 2000	10-K	001-06622	10(h)	3/19/2001
10.5*	2001 Stock Option Plan	DEF 14A	001-06622	A	3/29/2001
10.6*	Share Purchase Plan	10-Q	001-06622	10(j)	11/14/2002
10.7*	Supplemental Executive Retirement Plan	10-Q	001-06622	10(k)	11/14/2002
10.8*	Description of WRIT Short-term and Long-term Incentive Plan	10-K	001-06622	10(l)	3/16/2005
10.9*	Description of WRIT Revised Trustee Compensation Plan	10-K	001-06622	10(m)	3/16/2005
10.10*	Supplemental Executive Retirement Plan	10-K	001-06622	10(p)	3/16/2006
10.11*	Change in control Agreement dated May 22, 2003 with Thomas L. Regnell	10-K	001-06622	10(q)	3/16/2006
10.12*	Change in control Agreement dated June 13, 2005 with David A. DiNardo	10-K	001-06622	10(r)	3/16/2006
10.13*	Change in control Agreement dated May 22, 2003 with Laura M. Franklin	10-K	001-06622	10(t)	3/16/2006
10.14*	Change in control Agreement dated January 1, 2006 with James B. Cederdahl	10-K	001-06622	10(w)	3/16/2006
10.15*	Long Term Incentive Plan, effective January 1, 2006	10-K	001-06622	10(aa)	3/1/2007
10.16*	Short Term Incentive Plan, effective January 1, 2006	10-K	001-06622	10(bb)	3/1/2007
10.17*	2007 Omnibus Long Term Incentive Plan	DEF 14A	001-06622	B	4/9/2007
10.18*	Change in control Agreement dated June 1, 2007 with George F. McKenzie	10-Q	001-06622	10(dd)	8/9/2007
10.19*	Change in control Agreement dated May 14, 2007 with Michael S. Paukstitus	10-Q	001-06622	10(ee)	8/9/2007
10.20*	Deferred Compensation Plan for Directors dated December 1, 2000	10-K	001-06622	10(ff)	2/29/2008
10.21*	Deferred Compensation Plan for Officers dated January 1, 2007	10-K	001-06622	10(gg)	2/29/2008

61

		Incorporated by Reference
Exhibit Number	Exhibit Description	Form	File Number	Exhibit	Filing Date	Filed Herewith
10.22*	Supplemental Executive Retirement Plan II dated May 23, 2007	10-K	001-06622	10(hh)	2/29/2008
10.23*	Amended Long Term Incentive Plan, effective January 1, 2008	10-Q	001-06622	10(ii)	5/9/2008
10.24*	Transition Agreement and General Release dated August 5, 2008 with Sara L. Grootwassink	10-Q	001-06622	10(kk)	11/10/2008
10.25*	Change in control Agreement dated November 11, 2008 with William T. Camp	10-K	001-06622	10(mm)	3/2/2009
10.26*	Change in control Agreement dated October 2, 2008 with Thomas C. Morey	10-K	001-06622	10(mm)	3/2/2009
10.27*	Form of Indemnification Agreement by and between WRIT and the indemnitee	8-K	001-06622	10(nn)	7/27/2009
10.28*	Short Term Incentive Plan, effective January 1, 2009	10-K	001-06622	10.28	2/26/2010
10.29*	Long Term Incentive Plan, effective January 1, 2009	10-K	001-06622	10.29	2/26/2010
10.30*	Amended and Restated Deferred Compensation Plan for Directors, adopted October 27, 2010	10-Q	001-06622	10.30	11/4/2010
10.31*	Executive Stock Ownership Policy, adopted October 27, 2010	8-K	001-06622	10.31	11/2/2010
10.32*	Amendment to Deferred Compensation Plan for Officers, adopted October 27, 2010	8-K	001-06622	10.32	11/2/2010
12	Computation of Ratio of Earnings to Fixed Charges						X
21	Subsidiaries of Registrant						X
23.1	Consent of Independent Registered Public Accounting Firm						X
24	Power of Attorney						X
31.1	Certification of the Chief Executive Officer pursuant to Rule 13a-14(a) of the Securities Exchange Act of 1934, as amended (“the Exchange Act”)						X

62

		Incorporated by Reference
Exhibit Number	Exhibit Description	Form	File Number	Exhibit	Filing Date	Filed Herewith
31.2	Certification of the Executive Vice President – Accounting and Administration pursuant to Rule 13a-14(a) of the Exchange Act					X
31.3	Certification of the Chief Financial Officer pursuant to Rule 13a-14(a) of the Exchange Act					X
32	Certification of the Chief Executive Officer, Executive Vice President – Accounting and Administration and Chief Financial Officer pursuant to Rule 13a-14(b) of the Exchange Act and 18U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002					X

* Management contracts or compensation plans or arrangements in which trustees or executive officers are eligible to participate.

63

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.

	WASHINGTON REAL ESTATE INVESTMENT TRUST
Date: February 25, 2011
		By:	/s/ George F. McKenzie
			George F. McKenzie 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.

Signature	Title	Date
/s/ John P. McDaniel*	Chairman, Trustee	February 25, 2011
John P. McDaniel
/s/ George F. McKenzie	President, Chief Executive Officer and Trustee	February 25, 2011
George F. McKenzie
/s/ John M. Derrick, Jr.*	Trustee	February 25, 2011
John M. Derrick, Jr.
/s/ Charles T. Nason*	Trustee	February 25, 2011
Charles T. Nason
/s/ Edward S. Civera*	Trustee	February 25, 2011
Edward S. Civera
/s/ Thomas Edgie Russell, III*	Trustee	February 25, 2011
Thomas Edgie Russell, III
/s/ Terence C. Golden*	Trustee	February 25, 2011
Terence C. Golden
/s/ Wendelin A. White*	Trustee	February 25, 2011
Wendelin A. White
/s/ William G. Byrnes*	Trustee	February 25, 2011
William G. Byrnes
/s/ Laura M. Franklin	Executive Vice President Accounting, Administration	February 25, 2011
Laura M. Franklin	and Corporate Secretary
/s/ William T. Camp	Executive Vice President and	February 25, 2011
William T. Camp	Chief Financial Officer

* By: /s/ Laura M Franklin through power of attorney

Laura M Franklin

64

MANAGEMENT’S REPORT ON

INTERNAL CONTROL OVER FINANCIAL REPORTING

Management of Washington Real Estate Investment Trust (the “Trust”) is responsible for establishing and maintaining adequate internal control over financial reporting and for the assessment of the effectiveness of internal controls over financial reporting. The Trust’s internal control system over financial reporting is a process designed under the supervision of the Trust’s principal executive and principal financial officers to provide reasonable assurance regarding the reliability of financial reporting and the preparation of the consolidated financial statements in accordance with U.S. generally accepted accounting principles.

All internal control systems, no matter how well designed, have inherent limitations. Therefore, even those systems determined to be effective can provide only reasonable assurance with respect to financial statement preparation and presentation. 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.

In connection with the preparation of the Trust’s annual consolidated financial statements, management has undertaken an assessment of the effectiveness of the 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 (the COSO Framework). Management’s assessment included an evaluation of the design of the Trust’s internal control over financial reporting and testing of the operational effectiveness of those controls.

Based on this assessment, management has concluded that as of December 31, 2010, the Trust’s internal control over financial reporting was effective at a reasonable assurance level regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with U.S. generally accepted accounting principles.

Ernst & Young LLP, the independent registered public accounting firm that audited the Trust’s consolidated financial statements included in this report, have issued an unqualified opinion on the effectiveness of the Trust’s internal control over financial reporting, a copy of which appears on the next page of this annual report.

65

Report of Independent Registered Public Accounting Firm

The Board of Trustees and Shareholders of

Washington Real Estate Investment Trust

We have audited the accompanying consolidated balance sheets of Washington Real Estate Investment Trust and Subsidiaries as of December 31, 2010 and 2009, and the related consolidated statements of income, shareholders’ 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(A). These financial statements and schedule are the responsibility of the Company’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 Washington Real Estate Investment Trust and Subsidiaries at December 31, 2010 and 2009, and the consolidated results of their operations and their 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 basic 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), Washington Real Estate Investment Trust and Subsidiaries’ 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

McLean, Virginia

February 25, 2011

66

Report of Independent Registered Public Accounting Firm

The Board of Trustees and Shareholders of

Washington Real Estate Investment Trust

We have audited Washington Real Estate Investment Trust and Subsidiaries’ 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). Washington Real Estate Investment 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 Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the company’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, Washington Real Estate Investment Trust and Subsidiaries 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 of Washington Real Estate Investment Trust and Subsidiaries at December 31, 2010 and 2009, and the related consolidated statements of income, shareholders’ equity, and cash flows for each of the three years in the period ended December 31, 2010 of Washington Real Estate Investment Trust and Subsidiaries and our report dated February 25, 2011 expressed an unqualified opinion thereon.

/s/ Ernst & Young

McLean, Virginia

February 25, 2011

67

WASHINGTON REAL ESTATE INVESTMENT TRUST AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

AS OF DECEMBER 31, 2010 AND 2009

(IN THOUSANDS, EXCEPT PER SHARE DATA)

	December 31, 2010			December 31, 2009
Assets
Land	$	440,509		$	402,277
Income producing property		1,976,378			1,848,129
		2,416,887			2,250,406
Accumulated depreciation and amortization		(538,786	)		(457,858	)
Net income producing property		1,878,101			1,792,548
Development in progress		26,240			25,031
Total real estate held for investment, net		1,904,341			1,817,579
Investment in real estate sold or held for sale, net		—			48,636
Cash and cash equivalents		78,767			11,203
Restricted cash		21,552			17,668
Rents and other receivables, net of allowance for doubtful accounts of $8,394 and $6,412, respectively		55,176			49,617
Prepaid expenses and other assets		108,045			95,986
Other assets related to properties sold or held for sale		—			4,536
Total assets	$	2,167,881		$	2,045,225
Liabilities
Notes payable	$	753,587		$	688,912
Mortgage notes payable		380,171			383,563
Lines of credit		100,000			128,000
Accounts payable and other liabilities		51,130			52,324
Advance rents		12,597			10,743
Tenant security deposits		9,538			9,512
Other liabilities related to properties sold or held for sale		—			23,108
Total liabilities		1,307,023			1,296,162
Equity
Shareholders’ equity
Shares of beneficial interest; $0.01 par value; 100,000 shares authorized: 65,870 and 59,811 shares issued and outstanding, respectively		659			599
Additional paid in capital		1,127,825			944,825
Distributions in excess of net income		(269,935	)		(198,412	)
Accumulated other comprehensive income (loss)		(1,469	)		(1,757	)
Total shareholders’ equity		857,080			745,255
Noncontrolling interests in subsidiaries		3,778			3,808
Total equity		860,858			749,063
Total liabilities and shareholders’ equity	$	2,167,881		$	2,045,225

See accompanying notes to the financial statements.

68

WASHINGTON REAL ESTATE INVESTMENT TRUST AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF INCOME

FOR THE YEARS ENDED DECEMBER 31, 2010, 2009 AND 2008

(IN THOUSANDS, EXCEPT PER SHARE DATA)

	2010			2009			2008
Revenue
Real estate rental revenue	$	297,977		$	298,161		$	268,709
Expenses
Utilities		20,043			20,572			18,411
Real estate taxes		29,209			31,900			27,164
Repairs and maintenance		12,496			11,618			10,518
Property administration		9,480			9,648			9,651
Property management		8,578			7,401			7,544
Operating services and common area maintenance		16,793			15,909			13,523
Other real estate expenses		2,323			4,256			3,411
Depreciation and amortization		93,992			91,668			82,982
General and administrative		14,406			13,118			12,110
		207,320			206,090			185,314
Real estate operating income		90,657			92,071			83,395
Other income (expense)
Interest expense		(68,389	)		(74,074	)		(74,095	)
Other income		32			417			1,073
Gain (loss) on extinguishment of debt, net		(9,176	)		5,336			(5,583	)
Gain from non-disposal activities		7			73			17
		(77,526	)		(68,248	)		(78,588	)
Income from continuing operations		13,131			23,823			4,807
Discontinued operations:
Income from operations of properties sold or held for sale		2,829			3,777			7,211
Gain on sale of real estate		21,599			13,348			15,275
Net income		37,559			40,948			27,293
Less: Net income attributable to noncontrolling interests in subsidiaries		(133	)		(203	)		(211	)
Net income attributable to the controlling interests	$	37,426		$	40,745		$	27,082
Basic net income attributable to the controlling interests per share
Continuing operations	$	0.21		$	0.41		$	0.09
Discontinued operations, including gain on sale of real estate		0.39			0.30			0.46
Net income attributable to the controlling interests per share	$	0.60		$	0.71		$	0.55
Diluted net income attributable to the controlling interests per share
Continuing operations	$	0.21		$	0.41		$	0.09
Discontinued operations, including gain on sale of real estate		0.39			0.30			0.46
Net income attributable to the controlling interests per share	$	0.60		$	0.71		$	0.55
Weighted average shares outstanding – basic		62,140			56,894			49,138
Weighted average shares outstanding – diluted		62,264			56,968			49,217
Dividends declared and paid per share	$	1.73		$	1.73		$	1.72

See accompanying notes to the financial statements.

69

WASHINGTON REAL ESTATE INVESTMENT TRUST AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY

FOR THE YEARS ENDED DECEMBER 31, 2010, 2009 AND 2008

(IN THOUSANDS)

	Shares		Shares of Beneficial Interest at Par Value		Additional Paid in Capital		Distributions in Excess of Net Income Attributable to the Controlling Interests			Accumulated Other Comprehensive Income			Total Shareholders’ Equity			Noncontrolling Interests in Subsidiaries			Total Equity
Balance, December 31, 2007		46,682		468		582,526		(80,454	)		—			502,540			3,776			506,316
Comprehensive income:
Net income attributable to the controlling interests		—		—		—		27,082			—			27,082			—			27,082
Net income attributable to noncontrolling interests		—		—		—		—			—			—			211			211
Change in fair value of interest rate hedge		—		—		—					(2,335	)		(2,335	)		—			(2,335	)
Total comprehensive income		—		—		—		—			—			24,747			211			24,958
Distributions to noncontrolling interests		—		—		—		—			—			—			(192	)		(192	)
Dividends		—		—		—		(85,564	)		—			(85,564	)		—			(85,564	)
Equity offerings, net of issuance costs		5,466		55		184,878		—			—			184,933			—			184,933
Shares issued under Dividend Reinvestment Program		125		1		4,102		—			—			4,103			—			4,103
Share options exercised		120		1		2,642		—			—			2,643			—			2,643
Share grants, net of share grant amortization and forfeitures		41		1		3,227		—			—			3,228			—			3,228
Balance, December 31, 2008		52,434		526		777,375		(138,936	)		(2,335	)		636,630			3,795			640,425

70

WASHINGTON REAL ESTATE INVESTMENT TRUST AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY

FOR THE YEARS ENDED DECEMBER 31, 2010, 2009 AND 2008

(IN THOUSANDS)

	Shares		Shares of Beneficial Interest at Par Value		Additional Paid in Capital		Distributions in Excess of Net  Income Attributable to the Controlling Interests			Accumulated Other Comprehensive Income			Total Shareholders’ Equity			Noncontrolling Interests in Subsidiaries			Total Equity
Balance, December 31, 2008		52,434		526		777,375		(138,936	)		(2,335	)		636,630			3,795			640,425
Comprehensive income:
Net income attributable to the controlling interests		—		—		—		40,745			—			40,745			—			40,745
Net income attributable to noncontrolling interests		—		—		—		—			—			—			203			203
Change in fair value of interest rate hedge		—		—		—					578			578			—			578
Total comprehensive income		—		—		—		—			—			41,323			203			41,526
Distributions to noncontrolling interests		—		—		—		—			—			—			(190	)		(190	)
Dividends		—		—		—		(100,221	)		—			(100,221	)		—			(100,221	)
Equity offerings, net of issuance costs		7,240		72		160,843		—			—			160,915			—			160,915
Shares issued under Dividend Reinvestment Program		88		1		2,478		—			—			2,479			—			2,479
Share options exercised		3		—		45		—			—			45			—			45
Share grants, net of share grant amortization and forfeitures		46		—		4,084		—			—			4,084			—			4,084
Balance, December 31, 2009		59,811	$	599	$	944,825	$	(198,412	)	$	(1,757	)	$	745,255		$	3,808		$	749,063

See accompanying notes to the financial statements.

71

WASHINGTON REAL ESTATE INVESTMENT TRUST AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY

FOR THE YEARS ENDED DECEMBER 31, 2010, 2009 AND 2008

(IN THOUSANDS)

	Shares		Shares of Beneficial Interest at Par Value		Additional Paid in Capital		Distributions in Excess of Net Income Attributable to the Controlling Interests			Accumulated Other Comprehensive Income			Total Shareholders’ Equity			Noncontrolling Interests in Subsidiaries			Total Equity
Balance, December 31, 2009		59,811	$	599	$	944,825	$	(198,412	)	$	(1,757	)	$	745,255		$	3,808		$	749,063
Comprehensive income:
Net income attributable to the controlling interests		—		—		—		37,426			—			37,426			—			37,426
Net income attributable to noncontrolling interests		—		—		—		—			—			—			133			133
Change in fair value of interest rate hedge		—		—		—					288			288			—			288
Total comprehensive income		—		—		—		—			—			37,714			133			37,847
Distributions to noncontrolling interests		—		—		—		—			—			—			(163	)		(163	)
Dividends		—		—		—		(108,949	)		—			(108,949	)		—			(108,949	)
Equity offerings, net of issuance costs		5,645		56		168,824		—			—			168,880			—			168,880
Shares issued under Dividend Reinvestment Program		175		2		5,284		—			—			5,286			—			5,286
Share options exercised		164		2		3,961		—			—			3,963			—			3,963
Share grants, net of share grant amortization and forfeitures		75		—		4,931		—			—			4,931			—			4,931
Balance, December 31, 2010		65,870	$	659	$	1,127,825	$	(269,935	)	$	(1,469	)	$	857,080		$	3,778		$	860,858

72

WASHINGTON REAL ESTATE INVESTMENT TRUST AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

FOR THE YEARS ENDED DECEMBER 31, 2010, 2009 AND 2008

(IN THOUSANDS)

	2010			2009			2008
Cash flows from operating activities
Net income	$	37,559		$	40,948		$	27,293
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale of real estate		(21,599	)		(13,348	)		(15,275	)
Depreciation and amortization, including amounts in discontinued operations		95,746			94,447			86,898
Provision for losses on accounts receivable		4,150			6,889			4,346
Amortization of share grants, net		4,931			3,085			3,228
Amortization of debt premiums, discounts and related financing costs		5,532			6,957			7,669
Loss (gain) on extinguishment of debt, net		9,176			(5,336	)		5,583
Changes in operating other assets		(20,053	)		(14,576	)		(13,648	)
Changes in operating other liabilities		(3,509	)		(16,165	)		(8,979	)
Net cash provided by operating activities		111,933			102,901			97,115
Cash flows from investing activities
Real estate acquisitions, net *		(155,881	)		(19,828	)		(168,230	)
Capital improvements to real estate		(25,045	)		(27,337	)		(37,272	)
Development in progress		(1,337	)		(2,135	)		(15,509	)
Net cash received for sale of real estate		71,505			36,842			40,231
Non-real estate capital improvements		(392	)		(351	)		(642	)
Net cash used in investing activities		(111,150	)		(12,809	)		(181,422	)
Cash flows from financing activities
Line of credit borrowings		68,800			214,500			165,000
Line of credit repayments		(96,800	)		(153,500	)		(290,500	)
Dividends paid		(108,949	)		(100,221	)		(85,564	)
Distributions to noncontrolling interests		(163	)		(190	)		(192	)
Proceeds from equity offerings under dividend reinvestment program		5,286			2,479			4,103
Proceeds from mortgage notes payable		—			37,500			81,029
Principal payments – mortgage notes payable		(25,985	)		(54,030	)		(3,488	)
Proceeds from debt offering		247,998			—			100,000
Financing costs		(2,450	)		(847	)		(1,924	)
Net proceeds from equity offerings		168,880			160,915			184,933
Notes payable repayments, including penalties for early extinguishment		(193,799	)		(197,414	)		(81,344	)
Net proceeds from exercise of share options		3,963			45			2,643
Net cash provided by (used in) financing activities		66,781			(90,763	)		74,696
Net increase (decrease) in cash and cash equivalents		67,564			(671	)		(9,611	)
Cash and cash equivalents at beginning of year		11,203			11,874			21,485
Cash and cash equivalents at end of year	$	78,767		$	11,203		$	11,874
Supplemental disclosure of cash flow information:
Cash paid for interest, net of amounts capitalized	$	60,622		$	69,292		$	68,616

* See note 3 to the consolidated financial statements for the supplemental disclosure of non-cash investing and financing activities, including the assumption of mortgage debt in conjunction with some of our real estate acquisitions.

See accompanying notes to the financial statements.

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WASHINGTON REAL ESTATE INVESTMENT TRUST AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

FOR THE YEARS ENDED DECEMBER 31, 2010, 2009 AND 2008

NOTE 1:  NATURE OF BUSINESS

Washington Real Estate Investment Trust (“We” or “WRIT”), a Maryland real estate investment trust, is a self-administered, self-managed equity real estate investment trust, successor to a trust organized in 1960. Our business consists of the ownership and operation of income-producing real estate properties in the greater Washington Metro region. We own a diversified portfolio of office buildings, medical office buildings, industrial/flex centers, multifamily buildings and retail centers.

Federal Income Taxes

We believe that we qualify as a real estate investment trust (“REIT”) under Sections 856-860 of the Internal Revenue Code and intend to continue to qualify as such. To maintain our status as a REIT, we are required to distribute 90% of our ordinary taxable income to our shareholders. When selling properties, we have the option of (a) reinvesting the sale price of properties sold, allowing for a deferral of income taxes on the sale, (b) paying out capital gains to the shareholders with no tax to WRIT or (c) treating the capital gains as having been distributed to the shareholders, paying the tax on the gain deemed distributed and allocating the tax paid as a credit to the shareholders. During the three years ended December 31, 2010, we sold the following properties:

Disposition Date	Property	Type	Gain on Sale (in  thousands)
June 18, 2010	Parklawn Portfolio(1)	Office/Industrial	$	7,900
December 21, 2010	The Ridges	Office		4,500
December 22, 2010	Ammendale I&II/Amvax	Industrial		9,200
			$	21,600
May 13, 2009	Avondale	Multifamily	$	6,700
July 23, 2009	Tech 100 Industrial Park	Industrial		4,100
July 31, 2009	Brandywine Center	Office		1,000
November 13, 2009	Crossroads Distribution Center	Industrial		1,500
		Total 2009	$	13,300
June 6, 2008	Sullyfield Center/The Earhart Building	Industrial	$	15,300
		Total 2008	$	15,300

⁽¹⁾ The Parklawn Portfolio consists of three office properties (Parklawn Plaza, Lexington Building and Saratoga Building) and one industrial property (Charleston Business Center).

The capital gains from the sales were paid out to the shareholders.

Generally, and subject to our ongoing qualification as a REIT, no provisions for income taxes are necessary except for taxes on undistributed REIT taxable income and taxes on the income generated by our taxable REIT subsidiaries (“TRS”). Our TRS is subject to corporate federal and state income tax on its taxable income at regular statutory rates. Our TRS has net operating loss carryforwards available of approximately $4.8 million. These carryforwards begin to expire in 2028. We have determined that there were no material income tax provisions or material net deferred income tax items for our TRS for the years ended December 31, 2010, 2009 and 2008.

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The following is a breakdown of the taxable percentage of our dividends for 2010, 2009 and 2008, respectively (unaudited):

	Ordinary Income			Return of Capital			Unrecaptured Section 1250 Gain			Capital Gain
2010		55	%		31	%		11	%		3	%
2009		75	%		17	%		7	%		1	%
2008		60	%		18	%		6	%		16	%

NOTE 2: ACCOUNTING POLICIES

Basis of Presentation

The accompanying consolidated financial statements include the accounts of WRIT and its majority owned subsidiaries, after eliminating all intercompany transactions.

New Accounting Pronouncements

In January 2010, the FASB issued ASU No. 2010-06, Improving Disclosures About Fair Value (“ASU 2010-06”), which requires new disclosures about fair value measurements. Specifically, a reporting entity should disclose separately the amounts of significant transfers in and out of Level 1 and Level 2 fair value measurements and describe the reasons for the transfers. Additionally, the reconciliation for Level 3 fair value measurements should present separately information about purchases, sales, issuances and settlements. To date, we have not had any transfers in and out of Level 1 and Level 2 fair value measurements, nor do we have any Level 3 fair value measurements. Therefore, ASU 2010-06 did not have any impact on the fair value disclosures included in our consolidated financial statements.

Revenue Recognition

We lease multifamily properties under operating leases with terms of generally one year or less. We lease commercial properties (our office, medical office, retail and industrial segments) under operating leases with average terms of three to seven years. We recognize rental income and rental abatements from our multifamily and commercial leases when earned on a straight-line basis over the lease term. Recognition of rental income commences when control of the facility has been given to the tenant. We record a provision for losses on accounts receivable equal to the estimated uncollectible amounts. We base this estimate on our historical experience and a review of the current status of our receivables. We recognize percentage rents, which represent additional rents based on gross tenant sales, when tenants’ sales exceed specified thresholds.

We recognize sales of real estate at closing only when sufficient down payments have been obtained, possession and other attributes of ownership have been transferred to the buyer and we have no significant continuing involvement.

We recognize cost reimbursement income from pass-through expenses on an accrual basis over the periods in which the expenses were incurred. Pass-through expenses are comprised of real estate taxes, operating expenses and common area maintenance costs which are reimbursed by tenants in accordance with specific allowable costs per tenant lease agreements.

Accounts Receivable and Allowance for Doubtful Accounts

Accounts receivable primarily represents amounts accrued and unpaid from tenants in accordance with the terms of the respective leases, subject to our revenue recognition policy. We review receivables monthly and establish reserves when, in the opinion of management, collection of the receivable is doubtful. We establish reserves for tenants whose rent payment history or financial condition casts doubt upon the tenants’ ability to perform under their lease obligations. When we deem the collection of a receivable to be doubtful in the same quarter that we established the receivable, then we recognize the allowance for that receivable as an offset to real estate revenues. When we deem a receivable that was initially established in a prior quarter to be doubtful, then we recognize the allowance as an operating expense. In addition to rents due currently, accounts receivable include amounts representing minimal rental income accrued on a straight-line basis to be paid by tenants over the remaining term of their respective leases.

We include the following notes receivable balances in our accounts receivable balances (in millions):

	December 31, 2010		December 31, 2009
Notes receivable, net	$	8.8	$	8.5

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Noncontrolling Interests in Subsidiaries

We entered into an operating partnership agreement with a member of the entity that previously owned Northern Virginia Industrial Park in conjunction with the acquisition of this property in May 1998. This resulted in a noncontrolling ownership interest in this property based upon defined company ownership units at the date of purchase. The operating partnership agreement was amended and restated in 2002 resulting in a reduced noncontrolling ownership percentage interest. We account for this activity by applying the noncontrolling owner’s percentage ownership interest to the net income of the property and reporting such amount in our net income attributable to noncontrolling interests.

In August 2007 we acquired a 0.8 acre parcel of land located at 4661 Kenmore Avenue, Alexandria, Virginia for future medical office development. The acquisition was funded by issuing operating partnership units in an operating partnership, which is a consolidated subsidiary of WRIT. This resulted in a noncontrolling ownership interest in this property based upon defined company operating partnership units at the date of purchase.

Net income attributable to noncontrolling interests was as follows (in millions):

	2010		2009		2008
Net income attributable to noncontrolling interests	$	0.1	$	0.2	$	0.2

None of the income from noncontrolling interests is attributable to discontinued operations or accumulated other comprehensive income. Quarterly distributions are made to the noncontrolling owners equal to the quarterly dividend per share for each operating partnership unit.

Income attributable to the controlling interests from continuing operations was as follows (in millions):

	2010		2009		2008
Income attributable to the controlling interests from continuing operations	$	13.0	$	23.6	$	4.6

The operating partnership units could have a dilutive impact on our earnings per share calculation. They are not dilutive for the years ended December 31, 2010, 2009 and 2008, and are not included in our earnings per share calculations.

Deferred Financing Costs

We capitalize and amortize external costs associated with the issuance or assumption of mortgages, notes payable and fees associated with the lines of credit using the effective interest rate method or the straight-line method which approximates the effective interest rate method over the term of the related debt. As of December 31, 2010 and 2009 deferred financing costs were included in prepaid expenses and other assets as follows (in millions):

	December 31,
	2010						2009
	Gross Carrying Value		Accumulated Amortization		Net		Gross Carrying Value		Accumulated Amortization		Net
Deferred financing costs	$	14.3	$	7.2	$	7.1	$	17.9	$	10.1	$	7.8

We record the amortization of deferred financing costs as interest expense. Amortization of deferred financing costs for the three years ended December 31, 2010 was as follows (in millions):

	2010		2009		2008
Deferred financing costs amortization	$	2.4	$	3.1	$	3.6

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Deferred Leasing Costs

We capitalize and amortize costs associated with the successful negotiation of leases, both external commissions and internal direct costs, on a straight-line basis over the terms of the respective leases. As of December 31, 2010 and 2009 deferred leasing costs were included in prepaid expenses and other assets as follows (in millions):

	December 31,
	2010						2009
	Gross Carrying Value		Accumulated Amortization		Net		Gross Carrying Value		Accumulated Amortization		Net
Deferred leasing costs	$	37.6	$	13.9	$	23.7	$	32.3	$	11.3	$	21.0

We record the amortization of deferred leasing costs as amortization expense. If an applicable lease terminates prior to the expiration of its initial lease term, we write off the carrying amount of the costs to amortization expense. Amortization and writes-offs of deferred leasing costs for the three years ended December 31, 2010 were as follows (in millions):

	2010		2009		2008
Deferred leasing costs amortization	$	5.2	$	4.7	$	3.5

We capitalize and amortize against revenue leasing incentives associated with the successful negotiation of leases on a straight-line basis over the terms of the respective leases. As of December 31, 2010 and 2009 deferred leasing incentives were included in prepaid expenses and other assets as follows (in millions):

	December 31,
	2010						2009
	Gross Carrying Value		Accumulated Amortization		Net		Gross Carrying Value		Accumulated Amortization		Net
Deferred leasing incentives	$	14.5	$	2.9	$	11.6	$	12.2	$	1.6	$	10.6

If an applicable lease terminates prior to the expiration of its initial lease term, we write off the carrying amount of the costs as a reduction of revenue. We record the amortization of deferred leasing incentives as a reduction of revenue. Amortization and writes-offs of deferred leasing costs for the three years ended December 31, 2010 were as follows (in millions):

	2010		2009		2008
Deferred leasing incentives amortization	$	1.3	$	1.2	$	0.4

Real Estate and Depreciation

We depreciate buildings on a straight-line basis over estimated useful lives ranging from 28 to 50 years. We capitalize all capital improvement expenditures associated with replacements, improvements or major repairs to real property that extend its useful life and depreciate them using the straight-line method over their estimated useful lives ranging from 3 to 30 years. We also capitalize costs incurred in connection with our development projects, including capitalizing interest and other internal costs during periods in which qualifying expenditures have been made and activities necessary to get the development projects ready for their intended use are in progress. In addition, we capitalize tenant leasehold improvements when certain criteria are met, including when we supervise construction and will own the improvements. We depreciate all tenant improvements over the shorter of the useful life of the improvements or the term of the related tenant lease. Real estate depreciation expense from continuing operations for the years ended December 31, 2010, 2009 and 2008 was as follows (in millions):

	2010		2009		2008
Real estate depreciation	$	76.5	$	73.8	$	66.5

We charge maintenance and repair costs that do not extend an asset’s life to expense as incurred.

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We capitalize interest costs incurred on borrowing obligations while qualifying assets are being readied for their intended use. Total interest expense capitalized to real estate assets related to development and major renovation activities for the years ended December 31, 2010, 2009 and 2008 was as follows (in millions):

	2010		2009		2008
Capitalized interest	$	0.9	$	1.4	$	2.3

We amortize capitalized interest over the useful life of the related underlying assets upon those assets being placed into service.

We recognize impairment losses on long-lived assets used in operations and held for sale, development assets or land held for future development, if indicators of impairment are present and the net undiscounted cash flows estimated to be generated by those assets are less than the assets' carrying amount and estimated undiscounted cash flows associated with future development expenditures. If such carrying amount is in excess of the estimated cash flows from the operation and disposal of the property, we would recognize an impairment loss equivalent to an amount required to adjust the carrying amount to the estimated fair value. The estimated fair value would be calculated in accordance with current GAAP fair value provisions. During 2009 and 2008, we expensed $0.1 million and $0.6 million, respectively, included in general and administrative expenses, related to development projects no longer considered probable. There were no impairments recognized during the year ended December 31, 2010.

We record real estate acquisitions as business combinations in accordance with GAAP. We record acquired or assumed assets, including physical assets and in-place leases, and liabilities, based on their fair values. We record goodwill when the purchase price exceeds the fair value of the assets and liabilities acquired. We determine the estimated fair values of the assets and liabilities in accordance with current GAAP fair value provisions. We determine the fair values of acquired buildings on an “as-if-vacant” basis considering a variety of factors, including the replacement cost of the property, estimated rental and absorption rates, estimated future cash flows and valuation assumptions consistent with current market conditions. We determine the fair value of land based on comparisons to similar properties that have been recently marketed for sale or sold.

The fair value of in-place leases consists of the following components – (a) the estimated cost to us to replace the leases, including foregone rents during the period of finding a new tenant and foregone recovery of tenant pass-throughs (referred to as “absorption cost”), (b) the estimated cost of tenant improvements, and other direct costs associated with obtaining a new tenant (referred to as “tenant origination cost”); (c) estimated leasing commissions associated with obtaining a new tenant (referred to as “leasing commissions”); (d) the above/at/below market cash flow of the leases, determined by comparing the projected cash flows of the leases in place to projected cash flows of comparable market-rate leases (referred to as “net lease intangible”); and (e) the value, if any, of customer relationships, determined based on our evaluation of the specific characteristics of each tenant’s lease and our overall relationship with the tenant (referred to as “customer relationship value”). We have attributed no value to customer relationship value as of December 31, 2010 and 2009.

We discount the amounts used to calculate net lease intangibles using an interest rate which reflects the risks associated with the leases acquired. We include tenant origination costs in income producing property on our balance sheet and amortize the tenant origination costs as depreciation expense on a straight-line basis over the remaining life of the underlying leases. We classify leasing commissions and absorption costs as other assets and amortize leasing commissions and absorption costs as amortization expense on a straight-line basis over the remaining life of the underlying leases. We classify net lease intangible assets as other assets and amortize net lease intangible assets on a straight-line basis as a decrease to real estate rental revenue over the remaining term of the underlying leases. We classify net lease intangible liabilities as other liabilities and amortize net lease intangible liabilities on a straight-line basis as an increase to real estate rental revenue over the remaining term of the underlying leases. Should a tenant terminate its lease, we write off the unamortized portion of the tenant origination cost, leasing commissions, absorption costs and net lease intangible associated with that lease.

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Balances, net of accumulated depreciation or amortization, as appropriate, of the components of the fair value of in-place leases at December 31, 2010 and 2009 are as follows (in millions):

	December 31,
	2010						2009
	Gross Carrying Value		Accumulated Amortization		Net		Gross Carrying Value		Accumulated Amortization		Net
Tenant origination costs	$	47.7	$	25.4	$	22.3	$	39.0	$	20.4	$	18.6
Leasing commissions/absorption costs	$	63.3	$	28.6	$	34.7	$	48.3	$	22.1	$	26.2
Net lease intangible assets	$	10.6	$	7.1	$	3.5	$	9.4	$	6.3	$	3.1
Net lease intangible liabilities	$	33.2	$	18.6	$	14.6	$	32.0	$	14.6	$	17.4
Below-market ground lease intangible asset	$	12.1	$	0.6	$	11.5	$	12.1	$	0.4	$	11.7

Amortization of these components combined was as follows (in millions):

	2010		2009		2008
Amortization	$	8.9	$	9.1	$	10.7

Amortization of these components combined over the next five years is projected to be as follows (in millions):

	Amortization
2011	$	9.2
2012	$	8.0
2013	$	7.5
2014	$	6.7
2015	$	4.8

Discontinued Operations

We classify properties as held for sale when they meet the necessary criteria, which include: (a) senior management commits to and actively embarks upon a plan to sell the assets, (b) the sale is expected to be completed within one year under terms usual and customary for such sales and (c) actions required to complete the plan indicate that it is unlikely that significant changes to the plan will be made or that the plan will be withdrawn. We generally consider that a property has met these criteria when a sale of the property has been approved by the Board of Trustees, or a committee with authorization from the Board, there are no known significant contingencies related to the sale and management believes it is probable that the sale will be completed within one year. Depreciation on these properties is discontinued, but operating revenues, operating expenses and interest expense continue to be recognized until the date of sale.

Revenues and expenses of properties that are either sold or classified as held for sale are presented as discontinued operations for all periods presented in the consolidated statements of income. Interest on debt that can be identified as specifically attributed to these properties is included in discontinued operations. We do not have significant continuing involvement in the operations of any of our disposed properties.

Cash and Cash Equivalents

Cash and cash equivalents include investments readily convertible to known amounts of cash with original maturities of 90 days or less.

Restricted Cash

Restricted cash at December 31, 2010 and December 31, 2009 consisted of $21.6 million and $17.7 million, respectively, in funds escrowed for tenant security deposits, real estate tax, insurance and mortgage escrows and escrow deposits required by lenders on certain of our properties to be used for future building renovations or tenant improvements.

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Stock Based Compensation

We currently maintain equity based compensation plans for trustees, officers and employees and previously also maintained option plans for trustees, officers and employees.

We recognize compensation expense for time-based share units ratably over the period from the service inception date through the vesting period based on the fair market value of the shares on the date of grant. We initially measure compensation expense for restricted performance-based share units at fair value at the grant date as payouts are probable, and we remeasure compensation expense at subsequent reporting dates until all of the award’s key terms and conditions are known and a vesting has occurred. We amortize such performance-based share units to expense over the performance period. However, we measure compensation expense for performance-based share units with market conditions based on the grant date fair value, as determined using a Monte Carlo simulation, and we amortize the expense ratably over the requisite service period, regardless of whether the market conditions are achieved and the awards ultimately vest. Compensation expense for the trustee grants, which fully vest immediately, is fully recognized upon issuance based upon the fair market value of the shares on the date of grant.

Accounting for Uncertainty in Income Taxes

We can recognize a tax benefit only if it is “more likely than not” that a particular tax position will be sustained upon examination or audit. To the extent that the “more likely than not” standard has been satisfied, the benefit associated with a tax position is measured as the largest amount that is greater than 50% likely of being recognized upon settlement.

We are subject to U.S. federal income tax as well as income tax of the states of Maryland and Virginia, and the District of Columbia. However, as a REIT, we generally are not subject to income tax on our net income distributed as dividends to our shareholders.

Tax returns filed for 2007 through 2010 tax years are subject to examination by taxing authorities. We classify interest and penalties related to uncertain tax positions, if any, in our financial statements as a component of general and administrative expense.

Use of Estimates in the Financial Statements

The preparation of financial statements in conformity with GAAP requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Reclassifications

Certain prior year amounts have been reclassified from continuing operations to discontinued operations to conform to the current year presentation.

Other Comprehensive Income (Loss)

We recorded other comprehensive loss of $1.5 million and $1.8 million as of December 31, 2010 and 2009, respectively, to account for the changes in valuation of the interest rate swaps.

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NOTE 3: REAL ESTATE INVESTMENTS

Continuing Operations

Our real estate investment portfolio, at cost, consists of properties located in Maryland, Washington, D.C. and Virginia as follows (in thousands):

	December 31,
	2010		2009
Office	$	1,060,288	$	984,441
Medical office		398,559		394,804
Retail		351,395		267,932
Multifamily		321,719		319,375
Industrial/flex		284,926		283,854
	$	2,416,887	$	2,250,406

The amounts above reflect properties classified as continuing operations, which means they are to be held and used in rental operations (income producing property).

We have several properties in development. In the office segment, Dulles Station, Phase II remains in development. In the medical office segment, we have land under development at 4661 Kenmore Avenue. The cost of our real estate portfolio in development as of December 31, 2010 and 2009 is illustrated below (in thousands):

	December 31,
	2010		2009
Office	$	20,172	$	19,442
Medical office		5,463		5,153
Retail		546		371
Multifamily		59		65
Industrial/flex		—		—
	$	26,240	$	25,031

Our results of operations are dependent on the overall economic health of our markets, tenants and the specific segments in which we own properties. These segments include general purpose office, medical office, retail, multifamily and industrial. All segments are affected by external economic factors, such as inflation, consumer confidence, unemployment rates, etc. as well as changing tenant and consumer requirements. Because the properties are located in the Washington metro region, the Company is subject to a concentration of credit risk related to these properties.

As of December 31, 2010 no single property or tenant accounted for more than 10% of total assets or total real estate rental revenue.

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Properties we acquired during the years ending December 31, 2010, 2009 and 2008 are as follows:

Acquisition Date	Property	Type	Rentable Square  Feet (unaudited)		Contract Purchase  Price (In thousands)
June 3, 2010	925 and 1000 Corporate Drive	Office		271,000	$	68,000
December 1, 2010	Gateway Overlook	Retail		223,000		88,400
		Total 2010		494,000	$	156,400
August 13, 2009	Lansdowne Medical Office Building	Medical Office		87,000	$	19,900
		Total 2009		87,000	$	19,900
February 22, 2008	6100 Columbia Park Road	Industrial/Flex		150,000	$	11,200
May 21, 2008	Sterling Medical Office Building	Medical Office		36,000		6,500
September 3, 2008	Kenmore Apartments (374 units)	Multifamily		270,000		58,300
December 2, 2008	2445 M Street	Office		290,000		181,400
		Total 2008		746,000	$	257,400

As discussed in note 2 to the consolidated financial statements, we record the acquired physical assets (land, building and tenant improvements), in-place leases (absorption, tenant origination costs, leasing commissions, and net lease intangible assets/liabilities), and any other liabilities at their fair values. Our sole 2009 acquisition, Lansdowne Medical Office Building, was vacant as of the acquisition date, so we did not acquire any absorption costs, leasing commissions, tenant origination costs or net intangible lease assets/liabilities during 2009.

We have recorded the total purchase price of the above acquisitions as follows (in millions):

	Recordation of Purchase Price
	2010			2009		2008
Land	$	38.2		$	1.3	$	80.8
Buildings		93.3			18.6		140.1
Tenant origination costs		9.1			—		10.4
Leasing commissions/absorption costs		15.4			—		18.2
Net lease intangible assets		1.4			—		1.8
Net lease intangible liabilities		(1.5	)		—		(10.4	)
Furniture, fixtures & equipment		—			—		1.0
Discount on assumed mortgage		—			—		10.1
Total*	$	155.9		$	19.9	$	252.0

* Additional settlement costs, closing costs and adjustments are included in the basis for 2008.

A note receivable with a fair value of $7.3 million was acquired in conjunction with 2445 M Street in 2008 and is recorded separately as a note receivable in accounts receivable and other assets on the consolidated balance sheets^.

The weighted remaining average life in months for the components above, other than land and building, are 68 months for tenant origination costs, 86 months for leasing commissions/absorption costs, 65 months for net lease intangible assets and 112 months for net lease intangible liabilities.

The $0.5 million difference in total 2010 contract purchase price of $156.4 million and the recordation of purchase price of $155.9 million is due to a credit received at settlement for future tenant allowance obligations for Gateway Overlook.

The difference in total 2008 contract purchase price of properties acquired of $257.4 million and the acquisition cost per the consolidated statements of cash flows of $168.2 million is primarily the $101.9 million mortgage note assumed, offset by cash escrow accounts acquired totaling $11.4 million, both related to the 2445 M Street purchase. The remaining difference of $1.3 million is for additional settlement costs, closing costs and non-cash adjustments on all 2008 acquisitions.

The following unaudited pro-forma combined condensed statements of operations set forth the consolidated results of operations for the years ended December 31, 2010 and 2009 as if the above described acquisitions had occurred at the beginning of the period of acquisition and the same period in the year prior to the acquisition. The unaudited pro-forma

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information does not purport to be indicative of the results that actually would have occurred if the acquisitions had been in effect for the years ended December 31, 2010 and December 31, 2009. The unaudited data presented is in thousands, except per share data.

	Year Ended December 31,
	2010		2009
Real estate revenues	$	308,309	$	314,068
Income from continuing operations	$	17,267	$	29,351
Net income	$	41,696	$	46,474
Diluted earnings per share	$	0.67	$	0.81

Discontinued Operations

We dispose of assets (sometimes using tax-deferred exchanges) that no longer meet our long-term strategy or return objectives and where market conditions for sale are favorable. The proceeds from the sales may be reinvested into other properties, used to fund development operations or to support other corporate needs, or distributed to our shareholders. Properties are considered held for sale when they meet specified criteria (see note 2 – Discontinued Operations). Depreciation on these properties is discontinued at that time, but operating revenues, other operating expenses and interest continue to be recognized until the date of sale. We had no properties classified as sold or held for sale at December 31, 2010 and eight as sold or held for sale at December 31, 2009, as follows (in thousands):

	December 31,
	2010		2009
Office property	$	—	$	40,497
Industrial/Flex properties		—		25,526
Total	$	—	$	66,023
Less accumulated depreciation		—		(17,387	)
	$	—	$	48,636

We sold the following properties during the three years ended December 31, 2010:

Disposition Date	Property	Type	Rentable Square Feet (unaudited)		Contract Sales Price (in thousands)		Gain on Sale (in  thousands)
June 18, 2010	Parklawn Portfolio(1)	Office/Industrial		229,000	$	23,400	$	7,900
December 21, 2010	The Ridges	Office		104,000		27,500		4,500
December 22, 2010	Ammendale I&II and Amvax	Industrial		305,000		23,000		9,200
		Total 2010		638,000	$	73,900	$	21,600
May 13, 2009	Avondale	Multifamily		170,000	$	19,800	$	6,700
July 23, 2009	Tech 100 Industrial Park	Industrial		166,000		10,500		4,100
July 31, 2009	Brandywine Center	Office		35,000		3,300		1,000
November 13, 2009	Crossroads Distribution Center	Industrial		85,000		4,400		1,500
		Total 2009		456,000	$	38,000	$	13,300
June 6, 2008	Sullyfield Center/The Earhart Building	Industrial		336,000	$	41,100	$	15,300
		Total 2008		336,000	$	41,100	$	15,300

⁽¹⁾ The Parklawn Portfolio consists of three office properties (Parklawn Plaza, Lexington Building and Saratoga Building) and one industrial property (Charleston Business Center).

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Operating results of the properties classified as discontinued operations are summarized as follows (in thousands):

	Operating Income For the Year Ending December 31,
	2010			2009			2008
Revenues	$	8,159		$	12,114		$	18,478
Property expenses		(2,987	)		(4,631	)		(6,405	)
Depreciation and amortization		(1,754	)		(2,779	)		(3,916	)
Interest expense		(589	)		(927	)		(946	)
	$	2,829		$	3,777		$	7,211

Operating income by each property classified as discontinued operations is summarized below (in thousands):

		Operating Income For the Year Ending December 31,
Property	Segment	2010		2009		2008
Sullyfield Center	Industrial	$	—	$	—	$	1,070
The Earhart Building	Industrial		—		—		421
Avondale	Multifamily		—		392		861
Tech 100 Industrial Park	Industrial		—		261		668
Brandywine Center	Office		—		85		192
Crossroads Distribution Center	Industrial		—		153		199
Parklawn Plaza	Office		132		147		135
Lexington Building	Office		65		127		428
Saratoga Building	Office		225		436		546
Charleston Business Center	Industrial		370		688		718
The Ridges	Office		678		175		563
Ammendale I&II	Industrial		1,023		986		1,180
Amvax	Industrial		336		327		230
		$	2,829	$	3,777	$	7,211

NOTE 4: MORTGAGE NOTES PAYABLE

	December 31,
	2010		2009
On October 9, 2003, we assumed a $36.1 million mortgage note payable and a $13.7 million mortgage note payable as partial consideration for our acquisition of Prosperity Medical Center. The mortgages bear interest at 5.36% per annum and 5.34% per annum respectively. Principal and interest are payable monthly until May 1, 2013, at which time all unpaid principal and interest are payable in full.		43,987		44,975
On August 12, 2004, we assumed a $10.1 million mortgage note payable with an estimated fair value* of $11.2 million, as partial consideration for our acquisition of Shady Grove Medical Village II. The mortgage bears interest at 6.98% per annum. Principal and interest are payable monthly until December 1, 2011, at which time all unpaid principal and interest are payable in full.		9,375		9,688
On December 22, 2004, we assumed a $15.6 million mortgage note payable with an estimated fair value* of $17.8 million, and a $3.9 million mortgage note payable with an estimated fair value* of $4.2 million as partial consideration for our acquisition of Dulles Business Park. The mortgages bear interest at 7.09% per annum and 5.94% per annum, respectively. Principal and interest are payable monthly until August 10, 2012, at which time all unpaid principal and interest are payable in full.		18,311		18,969
On March 23, 2005, we assumed a $24.3 million mortgage note payable with an estimated fair value* of $25.0 million as partial consideration for our acquisition of Frederick Crossing. The mortgage bears interest at 5.95% per annum. Principal and interest are payable monthly until January 1, 2013, at which time all unpaid principal and interest are payable in full.		22,268		22,798

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On April 13, 2006, we assumed a $5.7 million mortgage note payable as partial consideration for the acquisition of 9707 Medical Center Drive. The mortgage bears interest at 5.32% per annum. Principal and interest are payable monthly until July 1, 2028, at which time all unpaid principal and interest are payable in full.		4,955		5,121
On June 22, 2006, we assumed a $4.9 million mortgage note payable as partial consideration for the acquisition of Plumtree Medical Center. The mortgage bears interest at 5.68% per annum. Principal and interest are payable monthly until March 11, 2013, at which time all unpaid principal and interest are payable in full.		4,512		4,601
On July 12, 2006, we assumed an $8.8 million mortgage note payable as partial consideration for the acquisition of 15005 Shady Grove Road. The mortgage bears interest at 5.73% per annum. Principal and interest are payable monthly until March 11, 2013, at which time all unpaid principal and interest are payable in full.		8,149		8,313
On August 25, 2006, we assumed a $34.2 million mortgage note payable as partial consideration for the acquisition of 20-50 West Gude Drive. The mortgage bears interest at 5.86% per annum. Principal and interest are payable monthly until February 11, 2013, at which time all unpaid principal and interest are payable in full.		31,486		32,170
On June 1, 2007, we assumed a $21.2 million mortgage note payable as partial consideration for the acquisition of Woodholme Medical Office Building. The mortgage bears interest at 5.29% per annum. Principal and interest are payable monthly until November 1, 2015, at which time all unpaid principal and interest are payable in full.		20,285		20,599
On June 1, 2007, we assumed a $3.1 million mortgage note payable and a $3.0 million mortgage note payable as partial consideration for our acquisition of the Ashburn Farm Office Park. The mortgages bear interest at 5.56% per annum and 5.69% per annum, respectively. Principal and interest are payable monthly until May 31, 2025 and July 31, 2023, respectively, at which time all unpaid principal and interest are payable in full.		4,841		5,073
On May 29, 2008, we executed three mortgage notes payable totaling $81.0 million secured by 3801 Connecticut Avenue, Walker House and Bethesda Hill. The mortgages bear interest at 5.71% per annum and interest only is payable monthly until May 31, 2016, at which time all unpaid principal and interest are payable in full.		81,029		81,029
On December 2, 2008, we assumed a $101.9 million mortgage note payable with an estimated fair value* of $91.7 million as partial consideration for the acquisition of 2445 M Street. The mortgage bears interest at 5.62% per annum. Interest is payable monthly until January 6, 2017, at which time all unpaid principal and interest are payable in full.		94,339		93,084
On February 2, 2009, we executed a $37.5 million mortgage note payable secured by Kenmore Apartments. The mortgage bears interest at 5.37% per annum. Principal and interest are payable monthly until March 1, 2019, at which time all unpaid principal and interest are payable in full.		36,634		37,143
	$	380,171	$	383,563

* The fair value of the mortgage notes payable was estimated upon acquisition by WRIT based upon market information and data, such as dealer or banker quotes for instruments with similar terms and maturities. There is no notation when the fair value at the inception of the mortgage is the same as the carrying value.

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Total carrying amount of the above mortgaged properties was $623.6 million and $621.0 million at December 31, 2010 and 2009, respectively. Scheduled principal payments during the five years subsequent to December 31, 2010 and thereafter are as follows (in thousands):

	Principal Payments
2011	$	13,349
2012		21,362
2013		106,630
2014		1,516
2015		20,041
Thereafter		223,978
		386,876
Net discounts/premiums		(6,705	)
Total	$	380,171

As of December 31, 2009, “Other liabilities related to properties sold or held for sale” includes a $21.9 million mortgage note payable secured by the Ridges, a property sold during the fourth quarter of 2010. We had repaid this mortgage note payable without penalty on July 12, 2010.

NOTE 5: UNSECURED LINES OF CREDIT PAYABLE

As of December 31, 2010, we maintained a $75.0 million unsecured line of credit maturing in June 2011 (“Credit Facility No. 1”) and a $262.0 million unsecured line of credit maturing in November 2011 (“Credit Facility No. 2”). The amounts of these lines of credit unused and available at December 31, 2010 are as follows (in millions):

	Credit Facility No. 1			Credit Facility No. 2
Committed capacity	$	75.0		$	262.0
Borrowings outstanding		—			(100.0	)
Letters of credit issued		(0.8	)		(0.9	)
Unused and available	$	74.2		$	161.1

We executed borrowings and repayments on the unsecured lines of credit during 2010 as follows (in millions):

	Credit Facility No. 1			Credit Facility No. 2
Balance at December 31, 2009	$	28.0		$	100.0
Borrowings		68.8			—
Repayments		(96.8	)		—
Balance at December 31, 2010	$	—		$	100.0

We made borrowings under Credit Facility No. 1 throughout 2010 to fund our acquisitions of Quantico Corporate Center and Gateway Overlook and to repay a mortgage note payable. We repaid these borrowings using proceeds from the equity issued under our sales agency financing agreement.

Borrowings under Credit Facility No. 1 bear interest at our option of LIBOR plus a spread based on the credit rating on our publicly issued debt or the higher of SunTrust Bank’s prime rate and the Federal Funds Rate in effect plus 0.5%. Borrowings under Credit Facility No. 2 bear interest at our option of LIBOR plus a spread based on the credit rating of our publicly issued debt or the higher of Wells Fargo Bank’s prime rate and the Federal Funds Rate in effect plus 0.5%. The interest rate spread for both credit facilities is currently 42.5 basis points.

For Credit Facility No. 2, the interest rate on the $100.0 million in outstanding borrowings is effectively fixed by a forward interest rate swap (see note 10 to the consolidated financial statements). With the forward interest rate swap, the effective interest rate on the $100.0 million borrowing is currently 2.525% (2.10% plus the current interest rate spread of 42.5 basis points).

All outstanding advances for Credit Facilities No. 1 and 2 are due and payable upon maturity in June 2011 and November 2011, respectively. Credit Facility No. 1 may be extended for one year at our option. Interest only payments are due and payable generally on a monthly basis. For the years ended December 31, 2010, 2009 and 2008, we recognized interest expense (excluding facility fees) as follows (in millions):

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	2010		2009		2008
Credit Facility No. 1	$	0.1	$	0.0	$	1.6
Credit Facility No.2	$	2.7	$	0.5	$	3.0

The average interest rate on borrowings for the years ended December 31, 2010, 2009 and 2008 was as follows:

	2010			2009			2008
Credit Facility No. 1		0.71	%		0.70	%		5.16	%
Credit Facility No.2		2.65	%		1.81	%		4.94	%

In addition, we pay a facility fee based on the credit rating of our publicly issued debt which currently equals 0.15% per annum of the committed capacity of each credit facility, without regard to usage. Rates and fees may be adjusted up or down based on changes in our senior unsecured credit ratings. For the years ended December 31, 2010, 2009 and 2008, we incurred facility fees as follows (in millions):

	2010		2009		2008
Credit Facility No. 1	$	0.1	$	0.1	$	0.1
Credit Facility No.2	$	0.4	$	0.4	$	0.4

Credit Facility No. 1 and No. 2 contain certain financial and non-financial covenants, all of which we have met as of December 31, 2010.

Information related to revolving credit facilities is as follows (in thousands):

	2010			2009			2008
Total revolving credit facilities at December 31	$	337,000		$	337,000		$	337,000
Borrowings outstanding at December 31		100,000			128,000			67,000
Weighted average daily borrowings during the year		112,573			33,656			91,262
Maximum daily borrowings during the year		141,000			128,000			192,500
Weighted average interest rate during the year		2.43	%		1.62	%		5.01	%
Weighted average interest rate at December 31		2.53	%		2.79	%		1.48	%

NOTE 6: NOTES PAYABLE

On February 20, 1998, we issued $50.0 million of 7.25% unsecured notes due February 25, 2028 at 98.653% to yield approximately 7.36%.

On March 17, 2003, we issued $60.0 million of 5.125% unsecured notes due March 2013. The notes bear an effective interest rate of 5.23%. Our total proceeds, net of underwriting fees, were $59.1 million. We used portions of the proceeds of these notes to repay advances on our lines of credit and to fund general corporate purposes.

On December 11, 2003, we issued $100.0 million of 5.25% unsecured notes due January 2014. The notes bear an effective interest rate of 5.34%. Our total proceeds, net of underwriting fees, were $99.3 million. We used portions of the proceeds of these notes to repay advances on our lines of credit.

On April 26, 2005, we issued $50.0 million of 5.05% unsecured notes due May 1, 2012 and $50.0 million of 5.35% unsecured notes due May 1, 2015, at effective yields of 5.064% and 5.359% respectively. The net proceeds from the sale of the notes of $99.1 million were used to repay borrowings under our lines of credit totaling $90.5 million and the remainder was used for general corporate purposes.

On October 6, 2005, we issued an additional $100.0 million of the series of 5.35% unsecured notes due May 1, 2015, at an effective yield of 5.49%. $93.5 million of the $98.1 million net proceeds from the sale of these notes was used to repay borrowings under our lines of credit and the remainder was used to fund general corporate purposes.

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On June 6, 2006, we issued $100.0 million of 5.95% unsecured notes due June 15, 2011 at 99.951% of par, resulting in an effective interest rate of 5.96%. Our total proceeds, net of underwriting fees, were $99.4 million. We used the proceeds of these notes to repay advances on one of our lines of credit.

On July 26, 2006, we issued an additional $50.0 million of the series of 5.95% unsecured notes due June 15, 2011 at 100.127% of par, resulting in an effective yield of 5.92%. Our total proceeds, net of underwriting fees, were $50.2 million. We used the proceeds of these notes to repay borrowings under our lines of credit and to fund general corporate purposes.

On October 1, 2010 we repurchased $56.1 million of the 5.95% unsecured notes due June 15, 2011 at 103.8% of par, resulting in a net loss on extinguishment of debt of $2.4 million, net of unamortized debt costs and debt discounts. As of December 31, 2010, $93.9 million of the 5.95% unsecured notes due June 15, 2011 was outstanding.

On September 30, 2010, we issued $250.0 million of 4.95% unsecured notes due October 1, 2020, at an effective interest rate of 5.053%. Our total proceeds, net of underwriting fees, were $245.8 million. We used a portion of the proceeds to repurchase $122.8 million of our outstanding 3.875% convertible notes due in 2026 and $56.1 million of our 5.95% senior notes due in 2011, and used the remaining proceeds to repay borrowings under our lines of credit and for general corporate purposes.

On September 11, 2006, we issued $100.0 million of 3.875% convertible notes due September 15, 2026. On September 22, 2006, we issued an additional $10.0 million of the 3.875% convertible notes due September 15, 2026, upon the exercise by the underwriter of an over-allotment option granted by WRIT. The notes were issued at 99.5% of par. Our total proceeds, net of underwriting fees, were $106.7 million. We used the proceeds of these notes to repay borrowings under our lines of credit and to fund general corporate purposes.

On January 22, 2007, we issued an additional $135.0 million of the 3.875% convertible notes due September 15, 2026. On January 30, 2007, we issued an additional $15.0 million of the 3.875% convertible notes due September 15, 2026, upon the exercise by the underwriter of an over-allotment option granted by WRIT. The notes were issued at 100.5% of par. Our total proceeds, net of underwriting fees, were $146.0 million. We used the proceeds of these notes to fund the acquisition of 270 Technology Park and a portion of the acquisition of Monument II, to repay borrowings under our lines of credit and to fund general corporate purposes.

We recorded the 3.875% convertible notes in the consolidated balance sheets as notes payable less a component of the total debt, representing the conversion feature, which is bifurcated and recorded in equity. As a result, as of the inception of the 3.875% convertible notes, we classified $21.0 million of the 3.875% convertible notes’ original carrying amount into shareholders’ equity. We accrete to interest expense the resulting discount on the 3.875% convertible notes over the expected life of the debt. The effective rate on the debt after bifurcating the equity component reflects our nonconvertible debt borrowing rate at the inception of the 3.875% convertible notes, which was 5.875%.

The convertible notes are convertible into our common shares at the option of the holder, under specific circumstances or on or after July 15, 2026, at an initial exchange rate of 20.090 common shares per $1,000 principal amount of notes. This is equivalent to an initial conversion price of $49.78 per common share, which represents a 22% premium over the $40.80 closing price of our common shares at the time the September 2006 transaction was priced and a 21% premium over the $41.17 closing price of our common shares at the time the January 2007 transaction was priced. Holders may convert their notes into our common shares prior to the maturity date based on the applicable conversion rate during any fiscal quarter if the closing price of our common shares for at least 20 trading days in the 30 consecutive trading day period ending on the last trading day of the immediate preceding fiscal quarter is more than 130% of the conversion price per common share on the last day of such preceding fiscal quarter. The initial conversion rate is subject to adjustment in certain circumstances including an adjustment to the rate if the quarterly dividend rate to common shareholders is in excess of $0.4125 per share. In addition, the conversion rate will be adjusted if we make distributions of cash or other consideration by us or any of our subsidiaries in respect of a tender offer or exchange offer for our common shares, to the extent such cash and the value of any such other consideration per common share validly tendered or exchanged exceeds the closing price of our common shares as defined in the note offering. Upon an exchange of notes, we will settle any amounts up to the principal amount of the notes in cash and the remaining exchange value, if any, will be settled, at our option, in cash, common shares or a combination thereof. The convertible notes could have a dilutive impact on our earnings per share calculation in the future. However, these convertible notes are not dilutive for the years ended December 31, 2010, 2009 and 2008, and are not included in our earnings per share calculations.

On or after September 20, 2011, we may redeem the convertible notes at a redemption price equal to the principal amount of the convertible notes plus any accrued and unpaid interest, if any, up to, but excluding, the purchase date. In addition, on September 15, 2011, September 15, 2016 and September 15, 2021 or following the occurrence of certain change in control transactions prior to September 15, 2011, holders of these notes may require us to repurchase the convertible notes for an amount equal to the principal amount of the convertible notes plus any accrued and unpaid interest thereon.

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During the three years ended December 31, 2010 we repurchased portions of the 3.875% convertible notes, as follows (in millions, except for %):

	Years Ended December 31,
	2010			2009			2008
Principal amount repurchased	$	131.7		$	109.7		$	16.0
Average repurchase price (as a % of par value)		102.6	%		87.9	%		75.0	%
Net gain (loss) on extinguishment of debt	$	(6.8	)	$	6.8		$	2.9

All gains or losses on extinguishment of debt are net of unamortized debt costs and debt discounts.

The net carrying amount of the principal is as follows (in thousands):

	December 31,
	2010			2009
Principal, gross	$	2,659		$	134,328
Unamortized discount		(36	)		(4,307	)
Principal, net		$2,623			$130,021

The remaining discount is being amortized through September, 2011, on the effective interest method.

The interest expense recognized relating to the contractual interest coupon and relating to the amortization of the discount was as follows (in millions):

	Years Ended December 31,
	2010		2009		2008
Contractual interest coupon	$	4.2	$	6.6	$	10.1
Amortization of the discount	$	2.0	$	2.9	$	4.3

During the first quarter of 2008, we repaid the $60 million outstanding principal balance under our 6.74% 10-year Mandatory Par Put Remarketed Securities (“MOPPRS”) notes. The total aggregate consideration paid to repurchase the notes was $70.8 million, which amount included the $8.7 million remarketing option value paid to the remarketing dealer and accrued interest paid to the holders. The loss on extinguishment of debt was $8.4 million, net of unamortized loan premium costs, upon settlement of these securities.

On February 21, 2008, we entered into a $100 million unsecured term loan (the “Term Loan”) with Wells Fargo Bank, National Association. The Term Loan had a maturity date of February 19, 2010 and bore interest at our option of LIBOR plus 1.50% or Wells Fargo’s prime rate.

On May 7, 2009, we entered into an agreement to modify the Term Loan with Wells Fargo, National Association to extend the maturity date from February 19, 2010 to November 1, 2011. This agreement also increased the interest rate on the Term Loan from LIBOR plus 1.50% to LIBOR plus 2.75%. To hedge our exposure to interest rate fluctuations on the Term Loan, we previously had entered into an interest rate swap on a notional amount of $100 million through the original maturity date of February 19, 2010. This interest rate swap had the effect of fixing the LIBOR portion of the interest rate on the variable rate debt at 2.95% through February 2010. The interest rate after the agreement to extend the maturity date, taking into account the swap, was 5.70% (2.95% plus 275 basis points). On May 6, 2009, we entered into a forward interest rate swap on a notional amount of $100 million for the period from February 20, 2010 through the maturity date of November 1, 2011. This forward interest rate swap would have had the effect of fixing the LIBOR portion of the interest rate on the term loan at 2.10% from February 20, 2010 through November 1, 2011. These swaps qualify as cash flow hedges (see note 10 to the consolidated financial statements).

However, on December 1, 2009 we prepaid the $100 million unsecured term loan using proceeds from our unsecured line of credit (see note 5 to the consolidated financial statements), incurring a loss on extinguishment of debt of $1.5 million. We used the forward interest rate swap discussed in the preceding paragraph to fix the current interest rate on the $100.0 million borrowing on our unsecured lines of credit at 2.525% (2.10% plus the interest rate spread, currently 42.5 basis points). These swaps qualify as cash flow hedges as discussed in note 10 to the consolidated financial statements.

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The following is a summary of our unsecured note and term loan borrowings (in thousands):

	December 31, 2010			December 31, 2009
5.95% notes due 2011	$	93,862		$	150,000
5.05% notes due 2012		50,000			50,000
5.125% notes due 2013		60,000			60,000
5.25% notes due 2014		100,000			100,000
5.35% notes due 2015		150,000			150,000
4.95% notes due 2020		250,000			—
3.875% notes due 2026		2,659			134,328
7.25% notes due 2028		50,000			50,000
Discount on notes issued		(2,938	)		(5,435	)
Premium on notes issued		4			19
Total	$	753,587		$	688,912

The required principal payments excluding the effects of note discounts or premium for the remaining years subsequent to December 31, 2010 are as follows (in thousands):

2011(1)	$	96,521
2012		50,000
2013		60,000
2014		100,000
2015		150,000
Thereafter		300,000
	$	756,521

⁽¹⁾ We reflect the 3.875% convertible notes as maturing in 2011on this schedule due to the fact that we may redeem them at a redemption price equal to the principal amount of the notes plus any accrued and unpaid interest, if any, up to, but excluding, the purchase date on or after September 20, 2011. In addition, on September 15, 2011, September 15, 2016 and September 15, 2021 or following the occurrence of certain change in control transactions prior to September 15, 2011, holders of these notes may require us to repurchase the notes for an amount equal to the principal amount of the notes plus any accrued and unpaid interest thereon.

Interest on these notes is payable semi-annually. These notes contain certain financial and non-financial covenants, all of which we have met as of December 31, 2010.

The covenants under our line of credit agreements require us to insure our properties against loss or damage in amounts customarily maintained by similar businesses or as they may be required by applicable law. The covenants for the notes require us to keep all of our insurable properties insured against loss or damage at least equal to their then full insurable value. We have an insurance policy which has no terrorism exclusion, except for non-certified nuclear, chemical and biological acts of terrorism. Our financial condition and results of operations are subject to the risks associated with acts of terrorism and the potential for uninsured losses as the result of any such acts. Effective November 26, 2002, under this existing coverage, any losses caused by certified acts of terrorism would be partially reimbursed by the United States under a formula established by federal law. Under this formula the United States pays 85% of covered terrorism losses exceeding the statutorily established deductible paid by the insurance provider, and insurers pay 10% until aggregate insured losses from all insurers reach $100 billion in a calendar year. If the aggregate amount of insured losses under this program exceeds $100 billion during the applicable period for all insured and insurers combined, then each insurance provider will not be liable for payment of any amount which exceeds the aggregate amount of $100 billion. On December 26, 2007, the Terrorism Risk Insurance Program Reauthorization Act of 2007 was signed into law and extends the program through December 31, 2014.

NOTE 7: SHARE OPTIONS AND GRANTS

2007 Plan

In March 2007, the WRIT Board of Trustees adopted, and in July 2007 WRIT shareholders approved, the Washington Real Estate Investment Trust 2007 Omnibus Long-Term Incentive Plan (“2007 Plan”). This plan replaced the Share Grant Plan, which expired on December 15, 2007, as well as the 2001 Stock Option Plan and Stock Option Plan for Trustees. The shares and options granted pursuant to the above plans are not affected by the adoption of the 2007 Plan. However, if an award under the Share Grant Plan is forfeited or an award of options granted under the Option Plans expires without being exercised, the shares covered by those awards will not be available for issuance under the 2007 Plan.

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The 2007 Plan provides for the award to WRIT’s trustees, officers and non-officer employees of restricted shares, restricted share units, options and other awards up to an aggregate of 2,000,000 shares over the ten year period in which the plan will be in effect. Restricted share units are converted into shares of our stock upon full vesting through the issuance of new shares. If an award under the 2007 Plan of restricted shares or restricted share units is forfeited or an award of options or any other rights granted under the 2007 Plan expires without being exercised, the shares covered by any such award would again become available for issuance under new awards.

Elected deferrals of short term incentive awards by officers are converted into restricted share units which vest immediately on the grant date and WRIT will match 25% of the deferred short term incentive in restricted share units, which vest at the end of three years. Dividends on these restricted share units are paid in the form of restricted share units valued based on the market value of WRIT’s stock on the date dividends are paid. We granted restricted share units pursuant to elective short term incentive deferrals as follows:

	Years Ended December 31,
	2010		2009		2008
Deferred short term incentive		1,364		—		876
Dividends		375		458		263

Total compensation expense recognized in the consolidated financial statements for all share based awards, including share grants, restricted share units and performance share units, was as follows (in millions):

	Years Ended December 31,
	2010		2009		2008
Stock-based compensation expense	$	5.9	$	3.5	$	2.4

Options

The previous Option Plans provided for the grant of qualified and non-qualified options. The last option awards to officers were in 2002, to non-officer key employees in 2003 and to trustees in 2004. Options granted under the plans were granted with exercise prices equal to the market price on the date of grant, vested 50% after year one and 50% after year two and expire ten years following the date of grant. Options granted to trustees were granted with exercise prices equal to the market price on the date of grant and were fully vested on the grant date. We accounted for option awards in accordance with APB No. 25, and we have recognized no compensation cost for stock options. The following chart details the previously issued and currently outstanding and exercisable stock options:

	2010					2009					2008
	Shares			Wtd Avg Ex Price		Shares			Wtd Avg Ex Price		Shares			Wtd Avg Ex Price
Outstanding at January 1		314,250		$	25.39		317,000		$	25.31		438,000		$	24.40
Granted		—			—		—			—		—			—
Exercised		(164,300	)	$	24.11		(2,750	)	$	16.34		(119,000	)	$	22.12
Expired/Forfeited		(4,000	)	$	28.23		—			—		(2,000	)	$	17.59
Outstanding at December 31		145,950		$	26.74		314,250		$	25.39		317,000		$	25.31
Exercisable at December 31		145,950		$	26.74		314,250		$	25.39		317,000		$	25.31

The 145,950 options outstanding at December 31, 2010, all of which are exercisable, have exercise prices between $24.85 and $33.09, with a weighted-average exercise price of $26.74 and a weighted average remaining contractual life of 2.0 years. The aggregate intrinsic value of outstanding exercisable shares at December 31, 2010 was $0.6 million. The aggregate intrinsic value of options exercised was $1.0 million in 2010, minimal in 2009 and $1.1 million in 2008. There were minimal options forfeited in 2010 and none in 2009.

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Share Grants, Restricted Share Units and Performance Share Units

We previously maintained a Share Grant Plan for officers, trustees and other members of management. In 2004 and 2005, we granted awards to officers and other members of management in the form of restricted shares. We valued the awards based on the fair market value at the date of grant. Shares vest ratably over a five year period from the date of grant.

The value of trustee share-based compensation, awarded as restricted shares, was $55,000. These shares vested immediately and are restricted from sale for the period of the trustee’s service.

The 2007 Plan provided for the granting of restricted share units and performance share units to officers and other members of management, based upon various percentages of their salaries and their positions with WRIT. For officers, one-third of the award was in the form of restricted share units that vest 20% per year based upon continued employment and two-thirds of the award was in the form of performance share units subject to performance and market conditions. For other members of management, 100% of the award was in the form of restricted share units awarded based on one-year performance targets that vested ratably over five years from the grant date based upon continued employment. We recognized compensation expense for awards to other members of management according to a graded vesting schedule over six years from the date the performance target was established.

With respect to the officer performance share units that were subject to performance conditions, awards were based on three-year cumulative performance targets, for which targets were set annually based on benchmarks with minimum and maximum payout thresholds. As the three-year cumulative performance targets were set independently each year, the grant date did not occur until all such targets were set and all of the significant terms of the award were known. Because payouts were probable, we estimated the compensation expense at each reporting period based on the current fair market value of the probable award, until the vesting occurred and as progress towards meeting target was known. We recognized the expense for such performance-based share units ratably over the three-year period, with cumulative catch-up adjustments recorded in the current period. With respect to the officer performance share units that were subject to market conditions, awards were based on a cumulative three-year market target which was set at the beginning of the three-year period. We recognized compensation expense ratably over the three-year service period, based on the grant date fair value, as determined using a Monte Carlo simulation, and regardless of whether the market conditions were achieved and the awards ultimately vested. All performance share units awarded based on achievement of respective performance or market conditions cliff vested at the end of the three-year period. The program provided that participants who terminated prior to the end of the three-year performance period forfeited their entire portion of the award.

The following are tables of activity for the years ended December 31, 2010, 2009 and 2008 related to our share grants, restricted share units, and performance share units.

Share Grants

	2010					2009					2008
	Shares			Wtd Avg Grant  Fair Value		Shares			Wtd Avg Grant  Fair Value		Shares			Wtd Avg Grant  Fair Value
Vested at January 1 Unvested at January 1		359,289 1,870		$ $	29.66 32.50		312,006 34,849		$ $	29.21 35.04		271,650 62,530		$ $	28.97 34.15
Granted		14,236		$	29.46		14,427		$	26.69		13,019		$	26.05
Vested during year		(15,176	)	$	29.65		(47,283	)	$	32.59		(40,356	)	$	30.86
Forfeited		(16	)	$	32.50		(123	)	$	32.78		(344	)	$	32.70
Unvested at December 31		914		$	32.50		1,870		$	32.50		34,849		$	35.04
Vested at December 31		374,465		$	29.66		359,289		$	29.66		312,006		$	29.21

The total fair value of share grants vested was as follows (in millions):

	Years Ended December 31,
	2010		2009		2008
Fair value of share grants vested	$	0.5	$	1.1	$	1.3

As of December 31, 2010, the total compensation cost related to non-vested share awards not yet recognized was $2,500, which we expect to recognize over a weighted average period of 1 month.

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Restricted Share Units

	2010					2009					2008
	Shares			Wtd Avg Grant  Fair Value		Shares			Wtd Avg Grant  Fair Value		Shares			Wtd Avg Grant  Fair Value
Vested at January 1 Unvested at January 1		63,856 158,406		$ $	33.49 28.08		28,914 106,562		$ $	35.00 30.63		8,154 80,831		$ $	35.73 34.35
Granted		87,634		$	28.19		88,414		$	26.67		49,004		$	26.16
Vested during year		(52,511	)	$	30.11		(34,942	)	$	32.24		(20,760	)	$	34.71
Forfeited		(1,104	)	$	28.39		(1,628	)	$	29.54		(2,513	)	$	33.97
Unvested at December 31		192,425		$	27.69		158,406		$	28.08		106,562		$	30.63
Vested at December 31		116,367		$	31.94		63,856		$	33.49		28,914		$	35.00

The total fair value of restricted share units vested was as follows (in millions):

	Years Ended December 31,
	2010		2009		2008
Fair value of restricted share units vested	$	1.6	$	0.8	$	0.7

The value of unvested restricted share units at December 31, 2010 was $4.1 million, which we expect to recognize as compensation cost over a weighted average period of 39 months.

Performance Share Units

Performance Share Units with Performance Conditions:

	2010					2009					2008
	Shares			Wtd Avg Grant  Fair Value		Shares			Wtd Avg Grant  Fair Value		Shares			Wtd Avg Grant  Fair Value
Vested at January 1 Unvested at January 1		79,600 53,400		$ $	24.31 26.69		43,000 —		$ $	30.41 —		—   43,000		$ $	—   30.41
Granted		500		$	26.69		90,000		$	22.81		—		$	—
Vested during year		(53,900	)	$	26.69		(36,600	)	$	17.15		(43,000	)	$	30.41
Forfeited		—		$	—		—		$	—		—		$	—
Unvested at December 31		—		$	—		53,400		$	26.69		—		$	—
Vested at December 31		133,500		$	25.27		79,600		$	24.31		43,000		$	30.41

Performance Share Units with Market Conditions:

	2010					2009
	Shares			Wtd Avg Grant  Fair Value		Shares		Wtd Avg Grant  Fair Value
Vested at January 1 Unvested at January 1		—   37,000		$ $	—   20.15		—   —	$ $	—   —
Granted		24,000		$	33.19		37,000	$	20.15
Vested during year		—		$	—		—	$	—
Expired/Forfeited		(1,900	)	$	22.21		—	$	—
Unvested at December 31		59,100		$	25.38		37,000	$	20.15
Vested at December 31		—		$	—		—	$	—

The total fair value of performance share units vested was as follows (in millions):

	Years Ended December 31,
	2010		2009		2008
Fair value of performance share units vested	$	1.6	$	0.9	$	1.4

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As of December 31, 2010, the future expected expense related to performance share units with performance conditions, estimated based on the probable number of performance share units expected to vest under the current plan, totaled $1.9 million, which we expect to recognize as compensation cost over a weighted average period of 18 months. As of December 31, 2010, the future expected expense related to performance share units with market conditions, totaled $0.8 million, which we expect to recognize over a weighted average period of 20 months.

We determine the fair value of performance share units that contain market conditions included in the chart above using a binomial model employing a Monte Carlo method as of the grant date. The market condition performance measurement is the cumulative three-year average total shareholder return relative to a defined population of 25 peer companies. The model evaluates the awards for changing total shareholder return over the term of vesting, relative to the peer group, and uses random simulations that are based on past stock characteristics as well as income growth and other factors for WRIT and each of the peer companies. There were no performance share units with market conditions prior to 2009. The following are the average assumptions used to the value awards granted as of December 31, 2010 and 2009, and their respective determined fair value:

	2010 Awards		2009 Awards
Expected volatility		58.1%		33.4%
Risk-free interest rate		1.4%		1.5%
Expected life (from grant date)		3.0 years		3.0 years
Price of underlying stock at measurement date		$26.69		$17.15
Performance share unit grant date fair value		$33.19		$20.15

We based the expected volatility upon the historical volatility of our daily share closing prices. We based the risk-free interest rate used on U.S. Treasury constant maturity bonds on the measurement date with a maturity equal to the market condition performance period. We based the expected term on the market condition performance period.

NOTE 8: OTHER BENEFIT PLANS

We have a Retirement Savings Plan (the “401(k) Plan”), which permits all eligible employees to defer a portion of their compensation in accordance with the Internal Revenue Code. Under the 401(k) Plan, we may make discretionary contributions on behalf of eligible employees. For the years ended December 31, 2010, 2009 and 2008, we made contributions to the 401(k) plan as follows (in millions):

	Years Ended December 31,
	2010		2009		2008
401(k) plan contributions	$	0.4	$	0.4	$	0.4

We have adopted non-qualified deferred compensation plans for the officers and members of the Board of Trustees. The plans allow for a deferral of a percentage of annual cash compensation and trustee fees. The plans are unfunded and payments are to be made out of the general assets of WRIT. During 2008, the prior Chief Executive Officer (“prior CEO”) received a lump sum distribution of the present value of his deferred compensation. The deferred compensation liability at December 31, 2010 and 2009 was as follows (in millions):

	December 31,
	2010		2009
Deferred compensation liability	$	1.1	$	0.9

We established a Supplemental Executive Retirement Plan (“SERP”) effective July 1, 2002 for the benefit of our prior CEO. Under this plan, upon the prior CEO’s termination of employment from WRIT for any reason other than death, permanent and total disability, or discharge for cause, he is entitled to receive an annual benefit equal to his accrued benefit times his vested interest. We accounted for this plan in accordance with FASB ASC 715-30 (formerly SFAS No. 87, Employers’ Accounting for Pensions), whereby we accrued benefit cost in an amount that resulted in an accrued balance at the end of the prior CEO’s employment in June 2007 which was not less than the present value of the estimated benefit payments to be made. At December 31, 2010, the accrued benefit liability was $1.6 million.

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For the three years ended December 31, 2010, 2009 and 2008, we recognized current service cost as follows (in millions):

	Years Ended December 31,
	2010		2009		2008
Prior CEO SERP current service cost	$	0.1	$	0.1	$	0.1

We currently have an investment in corporate owned life insurance intended to meet the SERP benefit liability since the prior CEO’s retirement. Benefit payments to the prior CEO began in 2008.

In November 2005, the Board of Trustees approved the establishment of a SERP for the benefit of the officers, other than the prior CEO. This is a defined contribution plan under which, upon a participant’s termination of employment from WRIT for any reason other than death, discharge for cause or total and permanent disability, the participant will be entitled to receive a benefit equal to the participant’s accrued benefit times the participant’s vested interest. We account for this plan in accordance with FASB ASC 710-10 (formerly EITF 97-14, Accounting for Deferred Compensation Arrangements Where Amounts Earned are Held in a Rabbi Trust and Invested) and FASB ASC 320-10 (formerly SFAS No. 115, Accounting for Certain Investments in Debt and Equity Securities), whereby the investments are reported at fair value, and unrealized holding gains and losses are included in earnings. For the years ended December 31, 2010, 2009 and 2008, we recognized current service cost as follows (in millions):

	Years Ended December 31,
	2010		2009		2008
Officer SERP current service cost	$	0.3	$	0.3	$	0.3

NOTE 9: FAIR VALUE DISCLOSURES

Assets and Liabilities Measured at Fair Value

For assets and liabilities measured at fair value on a recurring basis, quantitative disclosures about the fair value measurements are required to be disclosed separately for each major category of assets and liabilities. The only assets or liabilities we had at December 31, 2010 and 2009 that are recorded at fair value on a recurring basis are the assets held in the SERP and the interest rate hedge contracts. We base the valuations related to these items on assumptions derived from significant other observable inputs and accordingly these valuations fall into Level 2 in the fair value hierarchy. The fair values of these assets and liabilities at December 31, 2010 and 2009 are as follows (in millions):

	December 31, 2010								December 31, 2009
	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
SERP	$	1.7	$	—	$	1.7	$	—	$	1.1	$	—	$	1.1	$	—
Liabilities:
Derivatives	$	1.5	$	—	$	1.5	$	—	$	1.8	$	—	$	1.8	$	—

Financial Assets and Liabilities Not Measured at Fair Value

The following disclosures of estimated fair value were determined by management using available market information and established valuation methodologies, including discounted cash flow. Many of these estimates involve significant judgment. The estimated fair value disclosed may not necessarily be indicative of the amounts we could realize on disposition of the financial instruments. The use of different market assumptions or estimation methodologies could have an effect on the estimated fair value amounts. In addition, fair value estimates are made at a point in time and thus, estimates of fair value subsequent to December 31, 2010 may differ significantly from the amounts presented.

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Below is a summary of significant methodologies used in estimating fair values and a schedule of fair values at December 31, 2010.

Cash and Cash Equivalents

Cash and cash equivalents includes cash and commercial paper with original maturities of less than 90 days, which are valued at the carrying value, which approximates fair value due to the short maturity of these instruments.

Notes Receivable

The fair value of the notes is estimated based on quotes for debt with similar terms and characteristics or a discounted cash flow methodology using market discount rates if reliable quotes are not available.

Derivatives

The company reports its interest rate swap at fair value in accordance with GAAP, and thus the carrying value is the fair value.

Mortgage Notes Payable

Mortgage notes payable consist of instruments in which certain of our real estate assets are used for collateral. The fair value of the mortgage notes payable is estimated by discounting the contractual cash flows at a rate equal to the relevant treasury rates (with respect to the timing of each cash flow) plus credit spreads estimated through independent comparisons to real estate assets or loans with similar characteristics.

Lines of Credit Payable

Lines of credit payable consist of bank facilities which we use for various purposes including working capital, acquisition funding or capital improvements. The lines of credit advances are priced at a specified rate plus a spread. The carrying value of the lines of credit payable is estimated to be market value given the adjustable rate of these borrowings.

Notes Payable

The fair value of the notes payable is estimated by discounting the contractual cash flows at a rate equal to the relevant treasury rates (with respect to the timing of each cash flow) plus credit spreads derived using the relevant securities’ market prices.

	2010				2009
(in thousands)	Carrying Value		Fair Value		Carrying Value		Fair Value
Cash and cash equivalents, including restricted cash	$	100,319	$	100,319	$	30,373	$	30,373
2445 M Street note receivable	$	7,090	$	8,048	$	7,157	$	8,995
Mortgage notes payable	$	380,171	$	399,282	$	383,563	$	384,449
Lines of credit payable	$	100,000	$	100,000	$	128,000	$	128,000
Notes payable	$	753,587	$	785,637	$	688,912	$	693,620

NOTE 10: DERIVATIVE INSTRUMENTS

We enter into interest rate swaps from time to time to manage our exposure to variable interest rate risk. We do not purchase derivatives for speculation. In February 2008, we entered into an interest rate swap with a notional amount of $100 million that expired in February 2010. In May 2009, we entered into a forward interest rate swap with a notional amount of $100 million. Refer to note 6 of the consolidated financial statements for the effect of these swaps on our financial statements. Both interest rate swaps qualify as cash flow hedges. Our cash flow hedges are recorded at fair value in accordance with GAAP, based on discounted cash flow methodologies and observable inputs. We record the effective portion of changes in fair value of cash flow hedges in other comprehensive income. The change in fair value of cash flow hedges is the only activity in other comprehensive income (loss) during periods presented in our consolidated financial statements. We record the ineffective portion of changes in fair value of cash flow hedges in earnings in the period affected. We assess the effectiveness of our cash flow hedges both at inception and on an ongoing basis. We deemed the hedges to be effective for the years ended December 31, 2010 and 2009.

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The fair value and balance sheet locations of the interest rate swaps as of December 31, 2010 and 2009, are as follows (in millions):

	December 31, 2010		December 31, 2009
	Fair Value		Fair Value
Accounts payable and other liabilities	$	1.5	$	1.8

The interest rate swaps have been effective since inception. The gain or loss on the effective swaps is recognized in other comprehensive income, as follows (in millions):

	Years Ended December 31,
	2010		2009
	Fair Value		Fair Value
Change in other comprehensive income (loss)	$	0.3	$	0.5

Derivative instruments expose us to credit risk in the event of non-performance by the counterparty under the terms of the interest rate hedge agreement. We believe that we minimize our credit risk on these transactions by dealing with major, creditworthy financial institutions. As part of our on-going control procedures, we monitor the credit ratings of counterparties and our exposure to any single entity, thus minimizing our credit risk concentration.

NOTE 11: EARNINGS PER COMMON SHARE

We determine “Basic earnings per share” using the two-class method as our unvested restricted share awards and units have non-forfeitable rights to dividends, and are therefore considered participating securities. We compute basic earnings per share by dividing net income attributable to the controlling interest less the allocation of undistributed earnings to unvested restricted share awards and units by the weighted-average number of common shares outstanding for the period.

We also determine “Diluted earnings per share” under the two-class method with respect to the unvested restricted share awards. We further evaluate any other potentially dilutive securities at the end of the period and adjust the basic earnings per share calculation for the impact of those securities that are dilutive. Our dilutive earnings per share calculation includes the dilutive impact of employee stock options based on the treasury stock method and our performance share units under the contingently issuable method. The dilutive earnings per share calculation also considers our operating partnership units and 3.875% convertible notes under the if-converted method. The operating partnership units and 3.875% convertible notes were anti-dilutive for the years ended December 31, 2010, 2009 and 2008.

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The following table sets forth the computation of basic and diluted earnings per share (amounts in thousands; except per share data):

	Year Ended December 31, 2010
	Income (Numerator)			Shares (Denominator)		Per Share Amount
Basic earnings:
Income from continuing operations	$	13,131			62,140	$	0.21
Less: Net income attributable to noncontrolling interests		(133	)		62,140		—
Allocation of undistributed earnings to unvested restricted share awards and units		(144	)		62,140		—
Adjusted income from continuing operations attributable to the controlling interests		12,854			62,140		0.21
Income from discontinued operations, including gain on sale of real estate		24,428			62,140		0.39
Adjusted net income attributable to the controlling interests		37,282			62,140		0.60
Effect of dilutive securities:
Employee stock options and performance share units		—			124
Diluted earnings:
Adjusted income from continuing operations attributable to the controlling interests		12,854			62,264		0.21
Income from discontinued operations, including gain on sale of real estate		24,428			62,264		0.39
Adjusted net income attributable to the controlling interests	$	37,282			62,264	$	0.60

	Year Ended December 31, 2009
	Income (Numerator)			Shares (Denominator)		Per Share Amount
Basic earnings:
Income from continuing operations	$	23,823			56,894	$	0.42
Less: Net income attributable to noncontrolling interests		(203	)		56,894		(0.01	)
Allocation of undistributed earnings to unvested restricted share awards and units		(111	)		56,894		—
Adjusted income from continuing operations attributable to the controlling interests		23,509			56,894		0.41
Income from discontinued operations, including gain on sale of real estate		17,125			56,894		0.30
Adjusted net income attributable to the controlling interests		40,634			56,894		0.71
Effect of dilutive securities:
Employee stock options and performance share units		—			74
Diluted earnings:
Adjusted income from continuing operations attributable to the controlling interests		23,509			56,968		0.41
Income from discontinued operations, including gain on sale of real estate		17,125			56,968		0.30
Adjusted net income attributable to the controlling interests	$	40,634			56,968	$	0.71

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	Year Ended December 31, 2008
	Income (Numerator)			Shares (Denominator)		Per Share Amount
Basic earnings:
Income from continuing operations	$	4,807			49,138	$	0.10
Less: Net income attributable to noncontrolling interests		(211	)		49,138		(0.01	)
Allocation of undistributed earnings to unvested restricted share awards and units		(98	)		49,138		—
Adjusted income from continuing operations attributable to the controlling interests		4,498			49,138		0.09
Income from discontinued operations, including gain on sale of real estate		22,486			49,138		0.46
Adjusted net income attributable to the controlling interests		26,984			49,138		0.55
Effect of dilutive securities:
Employee stock options and performance share units		—			79
Diluted earnings:
Adjusted income from continuing operations attributable to the controlling interests		4,498			49,217		0.09
Income from discontinued operations, including gain on sale of real estate		22,486			49,217		0.46
Adjusted net income attributable to the controlling interests	$	26,984			49,217	$	0.55

NOTE 12: RENTALS UNDER OPERATING LEASES

Non-cancelable commercial operating leases provide for minimum rental income from continuing operations during each of the next five years and thereafter as follows (in millions):

	Rental Income
2011	$	211.7
2012		186.5
2013		163.9
2014		132.9
2015		104.9
Thereafter		177.5
	$	977.4

Apartment leases are not included as the terms are generally for one year. Most of these commercial leases increase in future years based on agreed-upon percentages or in some instances, changes in the Consumer Price Index. Percentage rents from retail centers, based on a percentage of tenants’ gross sales, were as follows (in millions):

	2010		2009		2008
Percentage rents	$	0.1	$	0.2	$	0.4

Real estate tax, operating expense and common area maintenance reimbursement income from continuing operations was as follows (in millions):

	2010		2009		2008
Reimbursement income	$	31.3	$	35.5	$	29.6

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NOTE 13: COMMITMENTS AND CONTINGENCIES

Development Commitments

At December 31, 2010 and 2009, we had various contracts outstanding with third parties in connection with our ongoing development projects. There are no remaining contractual commitments for development projects at December 31, 2010.

Litigation

We are involved from time to time in various legal proceedings, lawsuits, examinations by various tax authorities and claims that have arisen in the ordinary course of business. Management believes that the resolution of such matters will not have a material adverse effect on our financial condition or results of operations.

Other

At December 31, 2010, we were contingently liable under unused letters of credit in the amounts of $885,000 and $815,000, related to our assumption of mortgage debt on Dulles Business Park and West Gude, respectively, to ensure the funding of certain tenant improvements and leasing commissions over the term of the debt. We were also contingently liable under unused letters of credit totaling $18,000 related to our development project at Clayborne Apartment, to ensure the complete installation of public improvements in accordance with the projects’ related site plans.

NOTE 14: SEGMENT INFORMATION

We have five reportable segments: office, medical office, retail, multifamily and industrial/flex properties. Office buildings provide office space for various types of businesses and professions. Medical office buildings provide offices and facilities for a variety of medical services. Retail centers are typically neighborhood grocery store or drug store anchored retail centers. Multifamily properties provide rental housing for families throughout the Washington metropolitan area. Industrial/flex centers are used for flex-office, warehousing, services and distribution type facilities.

Real estate rental revenue as a percentage of the total for each of the five reportable operating segments is as follows:

	Year Ended December 31,
	2010			2009			2008
Office		44	%		44	%		42	%
Medical office		15	%		15	%		16	%
Retail		14	%		14	%		15	%
Multifamily		16	%		16	%		14	%
Industrial/Flex		11	%		11	%		13	%

The percentage of total income producing real estate assets, at cost, for each of the five reportable operating segments is as follows:

	December 31,
	2010			2009
Office		44	%		44	%
Medical office		16	%		17	%
Retail		15	%		12	%
Multifamily		13	%		14	%
Industrial/Flex		12	%		13	%

The accounting policies of each of the segments are the same as those described in note 2 to the consolidated financial statements. We evaluate performance based upon operating income from the combined properties in each segment. Our reportable operating segments are consolidations of similar properties. GAAP requires that segment disclosures present the measure(s) used by the chief operating decision maker for purposes of assessing segments’ performance. Net operating income is a key measurement of our segment profit and loss. Net operating income is defined as segment real estate rental revenue less segment real estate expenses.

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The following table presents revenues and net operating income for the years ended December 31, 2010, 2009 and 2008 from these segments, and reconciles net operating income of reportable segments to net income as reported (in thousands):

	2010
	Office		Medical Office		Retail		Multifamily		Industrial/Flex		Corporate and Other		Consolidated
Real estate rental revenue	$	131,157	$	45,028	$	41,003	$	48,599	$	32,190	$	—	$	297,977
Real estate expenses		45,320		14,715		10,310		19,243		9,334		—		98,922
Net operating income	$	85,837	$	30,313	$	30,693	$	29,356	$	22,856	$	—	$	199,055
Depreciation and amortization														(93,992	)
Interest expense														(68,389	)
General and administrative														(14,406	)
Other income (expense)														32
Loss on extinguishment of debt, net														(9,176	)
Gain from non-disposal activities														7
Income from discontinued operations														2,829
Gain on sale of real estate														21,599
Net income														37,559
Less: Net income attributable to noncontrolling interests														(133	)
Net income attributable to the controlling interests													$	37,426
Capital expenditures	$	13,983	$	4,986	$	1,982	$	2,387	$	1,707	$	392	$	25,437
Total assets	$	938,638	$	353,508	$	313,003	$	228,769	$	225,206	$	108,757	$	2,167,881

	2009
	Office		Medical Office		Retail		Multifamily		Industrial/Flex		Corporate and Other		Consolidated
Real estate rental revenue	$	130,671	$	44,911	$	41,821	$	46,470	$	34,288	$	—	$	298,161
Real estate expenses		46,528		15,218		10,680		19,494		9,384		—		101,304
Net operating income	$	84,143	$	29,693	$	31,141	$	26,976	$	24,904	$	—	$	196,857
Depreciation and amortization														(91,668	)
Interest expense														(74,074	)
General and administrative														(13,118	)
Other income (expense)														417
Gain on extinguishment of debt, net														5,336
Gain from non-disposal activities														73
Income from discontinued operations														3,777
Gain on sale of real estate														13,348
Net income														40,948
Less: Net income attributable to noncontrolling interests														(203	)
Net income attributable to the controlling interests													$	40,745
Capital expenditures	$	14,200	$	6,613	$	1,270	$	2,287	$	2,967	$	351	$	27,688
Total assets	$	926,433	$	360,220	$	225,548	$	240,442	$	251,986	$	40,596	$	2,045,225

101

	2008
	Office		Medical Office		Retail		Multifamily		Industrial/Flex		Corporate and Other		Consolidated
Real estate rental revenue	$	111,431	$	43,594	$	40,987	$	37,858	$	34,839	$	—	$	268,709
Real estate expenses		40,026		14,177		9,647		17,436		8,936		—		90,222
Net operating income	$	71,405	$	29,417	$	31,340	$	20,422	$	25,903	$	—	$	178,487
Depreciation and amortization														(82,982	)
Interest expense														(74,095	)
General and administrative														(12,110	)
Other income (expense)														1,073
Loss on extinguishment of debt, net														(5,583	)
Gain from non-disposal activities														17
Income from discontinued operations														7,211
Gain on sale of real estate														15,275
Net income														27,293
Less: Net income attributable to noncontrolling interests														(211	)
Net income attributable to the controlling interests													$	27,082
Capital expenditures	$	15,594	$	6,685	$	3,075	$	7,129	$	4,789	$	642	$	37,914
Total assets	$	952,112	$	346,725	$	230,917	$	264,457	$	268,689	$	46,507	$	2,109,407

NOTE 15: SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED)

The following table summarizes our financial data by quarter for 2010 and 2009 (in thousands, except for per share data):

	Quarter(1) (2)
	First		Second		Third		Fourth
2010:
Real estate rental revenue	$	74,615	$	73,481	$	74,738	$	75,143
Income (loss) from continuing operations	$	4,429	$	6,238	$	6,203	$	(3,739	)
Net income	$	5,265	$	15,021	$	6,658	$	10,615
Net income attributable to the controlling interests	$	5,216	$	14,994	$	6,625	$	10,591
Income (loss) from continuing operations per share
Basic	$	0.07	$	0.10	$	0.10	$	(0.06	)
Diluted	$	0.07	$	0.10	$	0.10	$	(0.06	)
Net income per share
Basic	$	0.09	$	0.24	$	0.11	$	0.16
Diluted	$	0.09	$	0.24	$	0.10	$	0.16
2009:
Real estate rental revenue	$	74,948	$	73,975	$	73,464	$	75,774
Income from continuing operations	$	9,614	$	5,436	$	3,698	$	5,075
Net income	$	10,900	$	13,142	$	9,603	$	7,303
Net income attributable to the controlling interests	$	10,851	$	13,090	$	9,550	$	7,254
Income from continuing operations per share
Basic	$	0.18	$	0.10	$	0.06	$	0.08
Diluted	$	0.18	$	0.10	$	0.06	$	0.08
Net income per share
Basic	$	0.20	$	0.23	$	0.16	$	0.12
Diluted	$	0.20	$	0.23	$	0.16	$	0.12

⁽¹⁾ With regard to per share calculations, the sum of the quarterly results may not equal full year results due to rounding.

⁽²⁾ The prior quarter results have been restated to conform to the current quarter presentation. Specifically, results related to properties sold or held for sale have been reclassified into discontinued operations.

102

NOTE 16: SHAREHOLDERS’ EQUITY

During the second quarter of 2008, we completed a public offering of 2.6 million common shares priced at $34.80 per share, raising $86.7 million in net proceeds. We used the net proceeds from the offering to repay borrowings under our lines of credit. During the fourth quarter of 2008, we completed a public offering of 1.725 million common shares priced at $35.00 per share, raising $57.6 million in net proceeds. We used the net proceeds from the offering to repay borrowings under our lines of credit and for general corporate purposes.

During the second quarter of 2009, we completed a public offering of 5.25 million common shares priced at $21.40 per share, raising $107.5 million in net proceeds. We used the net proceeds to repay a mortgage note payable, borrowings under our unsecured lines of credit and for general corporate purposes.

During the fourth quarter of 2009, we entered into a sales agency financing agreement with BNY Mellon Capital Markets, LLC relating to the issuance and sale of up to $250.0 million of the our common shares from time to time over a period of no more than 36 months, replacing a previous agreement made during the third quarter of 2008. Sales of our common shares are made at market prices prevailing at the time of sale. Net proceeds for the sale of common shares under this program are used for the repayment of borrowings under our lines of credit, acquisitions, and general corporate purposes. We executed issuances under this program as follows (in millions, except for weighted average issue price):

	2010		2009
Common shares issued		5.6		2.0
Weighted average issue price	$	30.34	$	27.37
Net proceeds	$	168.9	$	53.8

We have a dividend reinvestment program, whereby shareholders may use their dividends and optional cash payments to purchase common shares. The common shares sold under this program may either be common shares issued by us or common shares purchased in the open market. Net proceeds under this program are used for general corporate purposes. We executed issuances under this program as follows (in millions, except for weighted average issue price):

	2010		2009
Common shares issued		0.2		0.1
Weighted average issue price	$	30.36	$	28.34
Net proceeds	$	5.3	$	2.5

NOTE 17: SUBSEQUENT EVENTS

Subsequent to the end of 2010, we closed on the purchase of 1140 Connecticut Avenue, a 184,000 square foot office building in Washington, DC for $80.3 million. Additionally, we entered into a contract to purchase 1227 25^th Street, a 130,000 square foot office building in Washington, DC for $47.0 million. We anticipate closing on this purchase during the first half of 2011.

103

SCHEDULE III

			Initial Cost (b)				Net Improvements (Retirement) since Acquisition		Gross Amounts at Which Carried at December 31, 2010						Accumulated Depreciation at December 31, 2010
Properties	Location		Land		Buildings and Improvements				Land		Buildings and Improvements		Total (c)				Year of Construction		Date of Acquisition	Net Rentable Square Feet (e)		Units		Depreciation Life (d)
Multifamily Properties
3801 Connecticut Avenue (a)		DC	$	420,000	$	2,678,000	$	7,663,000	$	420,000	$	10,341,000	$	10,761,000	$	7,801,000		1951	Jan 1963		179,000		308		30 Years
Roosevelt Towers		VA	$	336,000	$	1,996,000	$	8,758,000	$	336,000	$	10,754,000	$	11,090,000	$	6,334,000		1964	May 1965		170,000		191		40 Years
Country Club Towers		VA	$	299,000	$	2,562,000	$	13,062,000	$	299,000	$	15,624,000	$	15,923,000	$	8,042,000		1965	Jul 1969		163,000		227		35 Years
Park Adams		VA	$	287,000	$	1,654,000	$	8,130,000	$	287,000	$	9,784,000	$	10,071,000	$	6,496,000		1959	Jan 1969		173,000		200		35 Years
Munson Hill Towers		VA	$	322,000	$	3,337,000	$	14,072,000	$	322,000	$	17,409,000	$	17,731,000	$	11,116,000		1963	Jan 1970		259,000		279		33 Years
The Ashby at McLean		VA	$	4,356,000	$	17,102,000	$	13,086,000	$	4,356,000	$	30,188,000	$	34,544,000	$	15,291,000		1982	Aug 1996		252,000		256		30 Years
Walker House Apartments (a)		MD	$	2,851,000	$	7,946,000	$	6,274,000	$	2,851,000	$	14,220,000	$	17,071,000	$	7,281,000		1971/03	Mar 1996		159,000		212		30 Years
Bethesda Hill Apartments (a)		MD	$	3,900,000	$	13,412,000	$	11,500,000	$	3,900,000	$	24,912,000	$	28,812,000	$	11,172,000		1986	Nov 1997		226,000		195		30 Years
Bennett Park		VA	$	2,861,000	$	917,000	$	78,647,000	$	4,774,000	$	77,651,000	$	82,425,000	$	12,823,000		2007	Feb 2001		268,000		224		28 Years
The Clayborne		VA	$	269,000	$	—	$	30,313,000	$	699,000	$	29,883,000	$	30,582,000	$	5,562,000		2008	Jun 2003		87,000		74		26 Years
The Kenmore (a)		DC	$	28,222,000	$	33,955,000	$	591,000	$	28,222,000	$	34,546,000	$	62,768,000	$	3,060,000		1948	Sep 2008		270,000		374		30 Years
			$	44,123,000	$	85,559,000	$	192,096,000	$	46,466,000	$	275,312,000	$	321,778,000	$	94,978,000					2,206,000		2,540
Office Buildings
1901 Pennsylvania Avenue		DC	$	892,000	$	3,481,000	$	13,520,000	$	892,000	$	17,001,000	$	17,893,000	$	12,381,000		1960	May 1977		97,000				28 Years
51 Monroe Street		MD	$	840,000	$	10,869,000	$	21,329,000	$	840,000	$	32,198,000	$	33,038,000	$	21,815,000		1975	Aug 1979		210,000				41 Years
515 King Street		VA	$	4,102,000	$	3,931,000	$	4,965,000	$	4,102,000	$	8,896,000	$	12,998,000	$	3,946,000		1966	Jul 1992		76,000				50 Years
6110 Executive Boulevard		MD	$	4,621,000	$	11,926,000	$	10,232,000	$	4,621,000	$	22,158,000	$	26,779,000	$	13,238,000		1971	Jan 1995		198,000				30 Years
1220 19th Street		DC	$	7,803,000	$	11,366,000	$	4,861,000	$	7,802,000	$	16,228,000	$	24,030,000	$	8,401,000		1976	Nov 1995		102,000				30 Years
1600 Wilson Boulevard		VA	$	6,661,000	$	16,742,000	$	12,105,000	$	6,661,000	$	28,847,000	$	35,508,000	$	12,220,000		1973	Oct 1997		166,000				30 Years
7900 Westpark Drive		VA	$	12,049,000	$	71,825,000	$	32,765,000	$	12,049,000	$	104,590,000	$	116,639,000	$	46,818,000		1972/'86/'99	Nov 1997		523,000				30 Years
600 Jefferson Plaza		MD	$	2,296,000	$	12,188,000	$	4,851,000	$	2,296,000	$	17,039,000	$	19,335,000	$	6,822,000		1985	May 1999		112,000				30 Years
1700 Research Boulevard		MD	$	1,847,000	$	11,105,000	$	3,232,000	$	1,847,000	$	14,337,000	$	16,184,000	$	6,554,000		1982	May 1999		101,000				30 Years
Wayne Plaza		MD	$	1,564,000	$	6,243,000	$	7,726,000	$	1,564,000	$	13,969,000	$	15,533,000	$	5,112,000		1970	May 2000		91,000				30 Years
Courthouse Square		VA		0	$	17,096,000	$	3,895,000		0	$	20,991,000	$	20,991,000	$	8,102,000		1979	Oct 2000		113,000				30 Years
One Central Plaza		MD	$	5,480,000	$	39,107,000	$	14,270,000	$	5,480,000	$	53,377,000	$	58,857,000	$	18,658,000		1974	Apr 2001		267,000				30 Years
Atrium Building		MD	$	3,182,000	$	11,281,000	$	2,417,000	$	3,182,000	$	13,698,000	$	16,880,000	$	5,111,000		1980	July 2002		80,000				30 Years
1776 G Street		DC	$	31,500,000	$	54,327,000	$	3,043,000	$	31,500,000	$	57,370,000	$	88,870,000	$	16,707,000		1979	Aug 2003		263,000				30 Years
Albermarle Point		VA	$	1,326,000	$	18,211,000	$	1,550,000	$	1,326,000	$	19,761,000	$	21,087,000	$	4,155,000		2001/03/'05	July 2005		89,000				30 Years
Dulles Station I		VA	$	9,467,000	$	1,225,000	$	43,452,000	$	9,467,000	$	44,677,000	$	54,144,000	$	5,230,000		2007	Dec 2005		180,000				30 Years
Dulles Station II (f)		VA	$	15,001,000	$	494,000	$	4,254,000	$	15,001,000	$	4,748,000	$	19,749,000		0		n/a	Dec 2005		0				n/a
West Gude (a)		MD	$	11,580,000	$	43,240,000	$	5,100,000	$	11,580,000	$	48,340,000	$	59,920,000	$	9,112,000		1984/86/88	Aug 2006		276,000				30 Years
The Crescent		MD	$	2,060,000	$	9,451,000	$	1,319,000	$	2,061,000	$	10,769,000	$	12,830,000	$	1,808,000		1989	Aug 2006		49,000				30 Years
6565 Arlington Boulevard		VA	$	5,584,000	$	23,195,000	$	2,948,000	$	5,584,000	$	26,143,000	$	31,727,000	$	4,927,000		1967	Aug 2006		140,000				30 Years
Monument II		VA	$	10,244,000	$	65,205,000	$	2,796,000	$	10,244,000	$	68,001,000	$	78,245,000	$	10,304,000		2000	Mar 2007		205,000				30 Years
Woodholme Center		MD	$	2,194,000	$	16,711,000	$	1,498,000	$	2,194,000	$	18,209,000	$	20,403,000	$	2,514,000		1989	Jun 2007		73,000				30 Years
2000 M Street		DC	$	—	$	61,101,000	$	3,936,000	$	—	$	65,037,000	$	65,037,000	$	8,100,000		1971	Dec 2007		227,000				30 Years
2445 M Street (a)		DC	$	46,887,000	$	106,743,000	$	508,000	$	46,887,000	$	107,251,000	$	154,138,000	$	8,725,000		1986	Dec 2008		290,000				30 Years
Quantico Building E		VA	$	4,518,000	$	24,801,000	$	27,000	$	4,518,000	$	24,828,000	$	29,346,000	$	788,000		2007	Jun 2010		135,000				30 Years
Quantico Building G		VA	$	4,897,000	$	25,376,000	$	26,000	$	4,897,000	$	25,402,000	$	30,299,000	$	837,000		2009	Jun 2010		136,000				30 Years
			$	196,595,000	$	677,240,000	$	206,625,000	$	196,595,000	$	883,865,000	$	1,080,460,000	$	242,385,000					4,199,000

-104-

Schedule III (continued)

			Initial Cost (b)				Net Improvements (Retirement) since Acquisition		Gross Amounts at Which Carried at December 31, 2010						Accumulated Depreciation at December 31, 2010
Properties	Location		Land		Buildings and Improvements				Land		Buildings and Improvements		Total (c)				Year of Construction		Date of Acquisition	Net Rentable Square Feet (e)		Units	Depreciation Life (d)
Medical Office
Woodburn Medical Park I		VA	$	2,563,000	$	12,460,000	$	3,853,000	$	2,563,000	$	16,313,000	$	18,876,000	$	6,580,000		1984	Nov 1998		71,000			30 Years
Woodburn Medical Park II		VA	$	2,632,000	$	17,574,000	$	3,849,000	$	2,632,000	$	21,423,000	$	24,055,000	$	8,309,000		1988	Nov 1998		96,000			30 Years
8501 Arlington Boulevard (a)		VA	$	2,071,000	$	26,317,000	$	480,000	$	2,071,000	$	26,797,000	$	28,868,000	$	7,049,000		2000	Oct 2003		92,000			30 Years
8503 Arlington Boulevard (a)		VA	$	1,598,000	$	25,850,000	$	339,000	$	1,598,000	$	26,189,000	$	27,787,000	$	6,794,000		2001	Oct 2003		88,000			30 Years
8505 Arlington Boulevard (a)		VA	$	2,819,000	$	19,680,000	$	601,000	$	2,819,000	$	20,281,000	$	23,100,000	$	5,274,000		2002	Oct 2003		75,000			30 Years
Shady Grove Medical II (a)		MD	$	1,995,000	$	16,601,000	$	235,000	$	1,995,000	$	16,836,000	$	18,831,000	$	3,826,000		1999	Aug 2004		66,000			30 Years
8301 Arlington Boulevard		VA	$	1,251,000	$	6,589,000	$	1,239,000	$	1,251,000	$	7,828,000	$	9,079,000	$	1,921,000		1965	Oct 2004		49,000			30 Years
Alexandria Professional Center		VA	$	6,783,000	$	19,676,000	$	3,693,000	$	6,783,000	$	23,369,000	$	30,152,000	$	3,857,000		1968	Apr 2006		113,000			30 Years
9707 Medical Center Drive (a)		MD	$	3,069,000	$	11,777,000	$	617,000	$	3,069,000	$	12,394,000	$	15,463,000	$	2,327,000		1994	Apr 2006		38,000			30 Years
15001 Shady Grove Road		MD	$	4,094,000	$	16,410,000	$	1,625,000	$	4,094,000	$	18,035,000	$	22,129,000	$	3,199,000		1999	Apr 2006		51,000			30 Years
15005 Shady Grove Road (a)		MD	$	4,186,000	$	17,548,000	$	137,000	$	4,186,000	$	17,685,000	$	21,871,000	$	2,912,000		2002	Jul 2006		52,000			30 Years
Plumtree Medical Center (a)		MD	$	1,723,000	$	5,749,000	$	784,000	$	1,723,000	$	6,533,000	$	8,256,000	$	1,161,000		1991	Jun 2006		33,000			30 Years
2440 M Street		DC	$	12,500,000	$	37,321,000	$	4,135,000	$	12,500,000	$	41,456,000	$	53,956,000	$	6,399,000		1986/06	Mar 2007		110,000			30 Years
Woodholme Medical Center (a)		MD	$	3,744,000	$	24,587,000	$	1,088,000	$	3,744,000	$	25,675,000	$	29,419,000	$	3,824,000		1996	Jun 2007		125,000			30 Years
Ashburn Farm Professional Cntr (a)		VA	$	3,770,000	$	19,200,000	$	695,000	$	3,770,000	$	19,895,000	$	23,665,000	$	2,777,000		1998/00/02	Jun 2007		75,000			30 Years
CentreMed I & II		VA	$	2,062,000	$	12,506,000	$	465,000	$	2,062,000	$	12,971,000	$	15,033,000	$	1,695,000		1998	Aug 2007		52,000			30 Years
4661 Kenmore Avenue (f)		VA	$	3,764,000	$	—	$	1,700,000	$	5,464,000	$	—	$	5,464,000	$	—		n/a	Aug 2007		0			n/a
Sterling Medical Office Bldg		VA	$	970,000	$	5,274,000	$	645,000	$	970,000	$	5,919,000	$	6,889,000	$	794,000		1986	May 2008		36,000			30 Years
Lansdowne MOB		VA	$	1,308,000	$	18,778,000	$	1,043,000	$	1,308,000	$	19,821,000	$	21,129,000	$	950,000		2009	Aug 2009		87,000			30 Years
			$	62,902,000	$	313,897,000	$	27,223,000	$	64,602,000	$	339,420,000	$	404,022,000	$	69,648,000					1,309,000
Retail Centers
Takoma Park		MD	$	415,000	$	1,084,000	$	96,000	$	415,000	$	1,180,000	$	1,595,000	$	1,118,000		1962	Jul 1963		51,000			50 Years
Westminster		MD	$	519,000	$	1,775,000	$	9,550,000	$	519,000	$	11,325,000	$	11,844,000	$	5,425,000		1969	Sep 1972		151,000			37 Years
Concord Centre		VA	$	413,000	$	850,000	$	3,331,000	$	413,000	$	4,181,000	$	4,594,000	$	2,748,000		1960	Dec 1973		76,000			33 Years
Wheaton Park		MD	$	796,000	$	857,000	$	4,084,000	$	796,000	$	4,941,000	$	5,737,000	$	2,887,000		1967	Sep 1977		72,000			50 Years
Bradlee		VA	$	4,152,000	$	5,383,000	$	7,940,000	$	4,152,000	$	13,323,000	$	17,475,000	$	8,385,000		1955	Dec 1984		168,000			40 Years
Chevy Chase Metro Plaza		DC	$	1,549,000	$	4,304,000	$	4,460,000	$	1,549,000	$	8,764,000	$	10,313,000	$	5,030,000		1975	Sep 1985		49,000			50 Years
Montgomery Village Center		MD	$	11,625,000	$	9,105,000	$	2,837,000	$	11,625,000	$	11,942,000	$	23,567,000	$	4,499,000		1969	Dec 1992		198,000			50 Years
Shoppes of Foxchase		VA	$	5,838,000	$	2,979,000	$	12,954,000	$	5,838,000	$	15,933,000	$	21,771,000	$	3,656,000		1960	Jun 1994		134,000			50 Years
Frederick County Square		MD	$	6,561,000	$	6,830,000	$	2,561,000	$	6,561,000	$	9,391,000	$	15,952,000	$	5,186,000		1973	Aug 1995		227,000			30 Years
800 S. Washington Street		VA	$	2,904,000	$	5,489,000	$	5,940,000	$	2,904,000	$	11,429,000	$	14,333,000	$	2,795,000		1951/'55/'59/'90	Jun 1998		44,000			30 Years
Centre at Hagerstown .		MD	$	13,029,000	$	25,415,000	$	1,189,000	$	13,029,000	$	26,604,000	$	39,633,000	$	7,837,000		2000	Jun 2002		332,000			30 Years
Frederick Crossing (a)		MD	$	12,759,000	$	35,477,000	$	1,154,000	$	12,759,000	$	36,631,000	$	49,390,000	$	7,620,000		1999-2003	Mar 2005		295,000			30 Years
Randolph Shopping Center		MD	$	4,928,000	$	13,025,000	$	595,000	$	4,928,000	$	13,620,000	$	18,548,000	$	2,373,000		1972	May 2006		82,000			30 Years
Montrose Shopping Center		MD	$	11,612,000	$	22,410,000	$	2,102,000	$	11,612,000	$	24,512,000	$	36,124,000	$	4,152,000		1970	May 2006		143,000			30 Years
Gateway Overlook		MD	$	28,816,000	$	52,249,000		0	$	28,816,000	$	52,249,000	$	81,065,000	$	136,000		2007	Dec 2010		223,000			30 Years
			$	105,916,000	$	187,232,000	$	58,793,000	$	105,916,000	$	246,025,000	$	351,941,000	$	63,847,000					2,245,000

-105-

Schedule III (continued)

			Initial Cost (b)				Net Improvements (Retirement) since Acquisition		Gross Amounts at Which Carried at December 31, 2010						Accumulated Depreciation at December 31, 2010
Properties	Location		Land		Buildings and Improvements				Land		Buildings and Improvements		Total (c)				Year of Construction		Date of Acquisition	Net Rentable Square Feet (e)		Units		Depreciation Life (d)
Industrial Properties
Fullerton Business Center		VA	$	950,000	$	3,317,000	$	1,807,000	$	950,000	$	5,124,000	$	6,074,000	$	2,489,000		1980	Sep 1985		104,000				50 Years
The Alban Business Center		VA	$	878,000	$	3,298,000	$	805,000	$	878,000	$	4,103,000	$	4,981,000	$	2,104,000		1981/'82	Oct 1996		87,000				30 Years
Pickett Industrial Park		VA	$	3,300,000	$	4,920,000	$	1,937,000	$	3,300,000	$	6,857,000	$	10,157,000	$	3,203,000		1973	Oct 1997		246,000				30 Years
Northern Virginia Ind. Park		VA	$	4,971,000	$	25,670,000	$	11,403,000	$	4,971,000	$	37,073,000	$	42,044,000	$	17,947,000		1968/91	May 1998		787,000				30 Years
8900 Telegraph Road		VA	$	372,000	$	1,489,000	$	351,000	$	372,000	$	1,840,000	$	2,212,000	$	779,000		1985	Sep 1998		32,000				30 Years
Dulles South IV		VA	$	913,000	$	5,997,000	$	1,460,000	$	913,000	$	7,457,000	$	8,370,000	$	2,724,000		1988	Jan 1999		83,000				30 Years
Sully Square		VA	$	1,052,000	$	6,506,000	$	1,413,000	$	1,052,000	$	7,919,000	$	8,971,000	$	3,006,000		1986	Apr 1999		95,000				30 Years
Fullerton Industrial Center		VA	$	2,465,000	$	8,397,000	$	682,000	$	2,464,000	$	9,080,000	$	11,544,000	$	2,579,000		1980/82	Jan 2003		137,000				30 Years
8880 Gorman Road		MD	$	1,771,000	$	9,230,000	$	322,000	$	1,771,000	$	9,552,000	$	11,323,000	$	2,273,000		2000	Mar 2004		141,000				30 Years
Dulles Business Park (a)		VA	$	6,085,000	$	50,504,000	$	2,414,000	$	6,084,000	$	52,919,000	$	59,003,000	$	13,116,000		1999/04/05	Dec 04/Apr 05		324,000				30 Years
Albemarle Point Place		VA	$	6,159,000	$	40,154,000	$	393,000	$	6,159,000	$	40,547,000	$	46,706,000	$	8,237,000		2001/03/05	Jul 2005		207,000				30 Years
Hampton		MD	$	7,048,000	$	16,223,000	$	724,000	$	7,048,000	$	16,947,000	$	23,995,000	$	3,483,000		1989/05	Feb 2006		302,000				30 Years
9950 Business Parkway		MD	$	2,035,000	$	9,236,000	$	278,000	$	2,035,000	$	9,514,000	$	11,549,000	$	1,847,000		2005	May 2006		102,000				30 Years
270 Technology Park		MD	$	4,704,000	$	21,115,000	$	601,000	$	4,704,000	$	21,716,000	$	26,420,000	$	3,391,000		1986/87	Feb 2007		157,000				30 Years
6100 Columbia Park Drive		MD	$	4,724,000	$	5,519,000	$	1,334,000	$	4,724,000	$	6,853,000	$	11,577,000	$	750,000		1969	Feb 2008		150,000				30 Years
			$	47,427,000	$	211,575,000	$	25,924,000	$	47,425,000	$	237,501,000	$	284,926,000	$	67,928,000					2,954,000
Total			$	456,963,000	$	1,475,503,000	$	510,661,000	$	461,004,000	$	1,982,123,000	$	2,443,127,000	$	538,786,000					12,913,000		2,540

a) At December 31, 2010, our properties were encumbered by non-recourse mortgage amounts as follows: $31,486,000 on West Gude Drive, $94,339,000 on 2445 M Street, $43,987,000 on Prosperity Medical Center, $9,375,000 on Shady Grove Medical Village, $4,955,000 on 9707 Medical Center Drive, $8,149,000 on 15005 Shady Grove Road, $4,512,000 on Plum Tree Medical Center, $20,285,000 on Woodholme Medical Center, $4,841,000 on Ashburn Farm, $22,268,000 on Frederick Crossing, $35,399,000 on 3801 Connecticut Avenue, $16,531,000 on Walker House, $29,099,000 on Bethesda Hill, $18,311,000 on Dulles Business Park and $36,634,000 on The Kenmore.

b) The purchase cost of real estate investments has been divided between land and buildings and improvements on the basis of management’s determination of the fair values.

c) At December 31, 2010, total land, buildings and improvements are carried at $2,588,915,000 for federal income tax purposes.

d) The useful life shown is for the main structure. Buildings and improvements are depreciated over various useful lives ranging from 3 to 50 years.

e) Residential properties are presented in gross square feet.

f) As of December 31, 2010, WRIT had under development an office project with 360,000 square feet of office space and a parking garage to be developed in Herndon, VA (Dulles Station Phase II). WRIT also held a 0.8 acre parcel of land at 4661 Kenmore for future medical office development. Additionally, WRIT had investments in various smaller development or redevelopment projects. The total land value not yet placed in service of our development projects at December 31, 2010 was $20.5 million.

-106-

WASHINGTON REAL ESTATE INVESTMENT TRUST AND SUBSIDIARIES

SUMMARY OF REAL ESTATE INVESTMENTS AND ACCUMULATED DEPRECIATION

(IN THOUSANDS)

The following is a reconciliation of real estate assets and accumulated depreciation for the years ended December 31, 2010, 2009 and 2008:

(In Thousands)	2010			2009			2008
Real estate assets
Balance, beginning of period	$	2,341,461		$	2,326,646		$	2,093,268
Additions - property acquisitions*		140,584			20,086			219,380
- improvements*		28,196			30,399			45,105
Deductions - write-off of disposed assets		(866	)		(2,451	)		(1,004	)
Deductions - property sales		(66,248	)		(33,219	)		(30,103	)
Balance, end of period	$	2,443,127		$	2,341,461		$	2,326,646
Accumulated depreciation
Balance, beginning of period	$	475,245		$	406,241		$	338,468
Additions - depreciation		83,302			82,022			75,254
Deductions - write-off of disposed assets		(866	)		(2,451	)		(1,004	)
Deductions - property sales		(18,895	)		(10,567	)		(6,477	)
Balance, end of period	$	538,786		$	475,245		$	406,241

* Includes non-cash accruals for capital items and assumed mortgages.

EX-12

EXHIBIT 12

WASHINGTON REAL ESTATE INVESTMENT TRUST

Computation of Ratios

(In thousands)

Earnings to fixed charges ratio:

	Q1 2010			Q2 2010			Q3 2010			Q4 2010			2010			2009			2008			2007			2006
Income (loss) from continuing operations	$	4,429		$	6,238		$	6,203		$	(3,739	)	$	13,131		$	23,823		$	4,807		$	21,877		$	29,749
Additions:
Fixed charges
Interest expense from continuing operations		16,838			16,785			16,965			17,801			68,389			74,074			74,095			65,378			47,533
Capitalized interest		342			349			83			83			857			1,352			2,347			6,672			3,782
		17,180			17,134			17,048			17,884			69,246			75,426			76,442			72,050			51,315
Deductions:
Capitalized interest		(342	)		(349	)		(83	)		(83	)		(857	)		(1,352	)		(2,347	)		(6,672	)		(3,782	)
Net income attributable to noncontrolling interests		(49	)		(27	)		(33	)		(24	)		(133	)		(203	)		(211	)		(217	)		(204	)
Adjusted earnings	$	21,218		$	22,996		$	23,135		$	14,038		$	81,387		$	97,694		$	78,691		$	87,038		$	77,078
Fixed Charges (from above)	$	17,180		$	17,134		$	17,048		$	17,884		$	69,246		$	75,426		$	76,442		$	72,050		$	51,315
Ratio of Earnings to Fixed Charges		1.24			1.34			1.36			0.78			1.18			1.30			1.03			1.21			1.50

WASHINGTON REAL ESTATE INVESTMENT TRUST

Computation of Ratios

(In thousands)

Debt service coverage ratio:

	Q1 2010		Q2 2010			Q3 2010			Q4 2010			2010			2009			2008			2007			2006
Net income attributable to the controlling interests	$	5,216	$	14,994		$	6,625		$	10,591		$	37,426		$	40,745		$	27,082		$	57,451		$	38,053
Additions:
Interest expense		17,065		17,013			17,100			17,801			68,979			75,001			75,041			66,336			47,873
Real estate depreciation and amortization		23,608		23,669			24,278			24,191			95,746			94,447			86,898			71,025			54,170
Non-real estate depreciation		272		274			277			279			1,102			1,192			1,175			878			384
		46,161		55,950			48,280			52,862			203,253			211,385			190,196			195,690			140,480
Deductions:
Gain on sale of real estate		—		(7,942	)		—			(13,657	)		(21,599	)		(13,348	)		(15,275	)		(25,022	)		—
Loss (gain) on extinguishment of debt		42		—			238			8,896			9,176			(5,336	)		5,583			—			—
Gain from non-disposal activities		—		—			(4	)		(3	)		(7	)		(73	)		(17	)		(1,303	)		—
Adjusted EBITDA	$	46,203	$	48,008		$	48,514		$	48,098		$	190,823		$	192,628			180,487			169,365			140,480
Debt service:
Interest expense		17,065		17,013			17,100			17,801			68,979			75,001			75,041			66,336			47,873
Principal amortization		1,108		1,082			997			1,115			4,302			4,030			3,488			2,977			2,195
		18,173		18,095			18,097			18,916			73,281			79,031			78,529			69,313			50,068
Debt service coverage ratio		2.54		2.65			2.68			2.54			2.60			2.44			2.30			2.44			2.81

EX-21

Exhibit 21

Entity Name	State of Organization
WRIT Limited Partnership	Delaware
Real Estate Management, Inc.	Maryland
WRIT-NVIP, L.L.C.	Virginia
Washington Parking, Inc.	Maryland
WRIT Dulles Station, L.L.C.	Delaware
Washington Metro Inc.	Maryland
WRIT Dulles Holdings, L.L.C.	Delaware
WRIT Dulles II, L.L.C.	Delaware
WRIT-MBA, L.L.C.	Delaware
Cascade/Maryland Properties LLC	Washington
Munson Hill Towers, L.L.C.	Virginia
WRIT Prosperity Holdings, L.L.C.	Delaware
WRIT 8501-8503, L.L.C.	Delaware
WRIT 8505, L.L.C.	Delaware
Shady Grove Medical Village II, L.L.C.	Maryland
Shady Grove Medical Village III, L.L.C.	Maryland
WRIT Dulles I, L.L.C.	Delaware
WRIT Frederick Crossing Land, L.L.C.	Delaware
WRIT Frederick Crossing Lease, L.L.C.	Delaware
WRIT Frederick Crossing Associates, Inc.	Maryland
Frederick Crossing Associates, L.C.	Virginia
Frederick Crossing Retail Associates, L.C.	Virginia
Dalton Ventures, L.L.C.	Delaware
WRIT Investment Nine, L.L.C.	Maryland
WRIT Investment Ten, L.L.C.	Maryland
WRIT Investment Thirteen, L.L.C.	Maryland
SGMB L.P.	Maryland
SGPC L.L.C.	Maryland
WRIT Beltway 50 Limited Partnership, L.L.L.P.	Maryland
Plumtree Partners, L.L.C.	Maryland
WRIT 15005 SG, L.L.C.	Delaware
SME Rock, L.L.C.	Delaware
SYN-Rock, L.L.C.	Maryland
Trade Rock, L.L.C.	Delaware
SAH Ridge L.L.C.	Delaware
SYN-Ridge, L.L.C.	Maryland
SME Rock Manager, Inc.	Delaware
SYN-Rock Manager, Inc.	Delaware
Trade Rock Manager, Inc.	Delaware
M.O.R.F III Associates L.P.	Maryland
WRIT – Spectrum L.L.C.	Delaware
MORF 6, L.L.C.	Delaware
WRIT 2440 M, L.L.C.	Delaware
WRIT Woodholme, L.L.C.	Delaware
Woodholme Medical Office Building, L.L.C.	Delaware
Morgstan, L.L.C.	Maryland
WH-I Land, L.L.C.	Maryland
FR/Cal Columbia Park, L.L.C.	Delaware
WRIT-Kenmore, L.L.C.	Delaware
WRIT-2445 M, L.L.C.	Delaware
WRIT Gateway Overlook, L.L.C.	Delaware
WRIT 1140 CT, L.L.C.	Delaware

EX-23.1

Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the Registration Statement (Form S-8, File No. 33-63671, Form S-8, File No. 333-48081, Form S-8, File No. 333-48882, Form S-4 Form No. 333-48293, Form S-8, File No. 333-68016, Form S-3, File No. 333-160664, Form S-3, File No. 333-160655, and Form S-8, File No. 333-145327) of Washington Real Estate Investment Trust and Subsidiaries and in the related Prospectus of our reports dated February 25, 2011, with respect to the consolidated financial statements and schedule of Washington Real Estate Investment Trust and Subsidiaries, and the effectiveness of internal control over financial reporting of Washington Real Estate Investment Trust and Subsidiaries, included in this Annual Report (Form 10-K) for the year ended December 31, 2010.

/s/ Ernst & Young

McLean, Virginia

February 25, 2011

EX-24

Exhibit 24

POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS THAT the undersigned trustees of Washington Real Estate Investment Trust, a Maryland Real Estate Investment Trust (‘Trust’), do hereby constitute and appoint each of LAURA M. FRANKLIN and WILLIAM T. CAMP, signing singly, the undersigneds’ true and lawful attorney in fact to sign his or her name to the Annual Report on Form 10-K for the year ended December 31, 2010, under the Securities Exchange Act of 1934, as amended, and to any and all amendments, of said Trust, and to cause the same to be filed with the SEC, granting unto said attorneys in fact and each of them full power and authority to do and perform any act and thing necessary and proper to be done in the premises, as fully and to all intents, and purposes as the undersigned could do if personally present, and the undersigned hereby ratify and confirm all that said attorneys in fact or either one of them shall lawfully do or cause to be done by virtue hereof.

Dated: February 17, 2011
/s/ JOHN P. MCDANIEL	/s/ GEORGE F. McKENZIE
JOHN P. MCDANIEL	GEORGE F. McKENZIE
/s/ WILLIAM G. BYRNES	/s/ CHARLES T. NASON
WILLIAM G. BYRNES	CHARLES T. NASON
/s/ EDWARD S. CIVERA	/s/ T. EDGIE RUSSELL, III
EDWARD S. CIVERA	T. EDGIE RUSSELL, III
/s/ JOHN M. DERRICK, JR.	/s/ WENDELIN A. WHITE
JOHN M. DERRICK, JR.	WENDELIN A. WHITE
/s/ TERENCE C. GOLDEN
TERENCE C. GOLDEN

EX-31.1

Exhibit 31.1

CERTIFICATION

I, George F. McKenzie, certify that:

1. I have reviewed this annual report on Form 10-K of Washington Real Estate Investment 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 reasonable likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officers 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 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 reasonable 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	/s/ George F. McKenzie
	George F. McKenzie
	Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Laura M. Franklin, certify that:

1. I have reviewed this annual report on Form 10-K of Washington Real Estate Investment 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 reasonable likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officers 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 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 reasonable 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	/s/ Laura M. Franklin
	Laura M. Franklin
	Executive Vice President
	Accounting, Administration and Corporate Secretary

EX-31.3

Exhibit 31.3

CERTIFICATION

I, William T. Camp, certify that:

1. I have reviewed this annual report on Form 10-K of Washington Real Estate Investment 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 reasonable likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officers 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 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 reasonable 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	/s/ William T. Camp
	William T. Camp
	Chief Financial Officer

EX-32

Exhibit 32

WRITTEN STATEMENT OF

CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER

PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

The undersigned, the President and Chief Executive Officer, the Executive Vice President Accounting, Administration and Corporate Secretary, and the Chief Financial Officer of Washington Real Estate Investment Trust (“WRIT”), each hereby certifies on the date hereof, that:

(a) the Annual Report on Form 10-K for the year ended December 31, 2010 filed on the date hereof with the Securities and Exchange Commission (the “Report”) fully complies with the requirements of Section 13 (a) or 15(d) of the Securities Exchange Act of 1934; and

(b) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of WRIT.

Dated: February 25, 2011	/s/ George F. McKenzie
	George F. McKenzie
	President & CEO
Dated: February 25, 2011	/s/ Laura M. Franklin
	Laura M. Franklin
	Executive Vice President
	Accounting, Administration and Corporate
	Secretary
Dated: February 25, 2011	/s/ William T. Camp
	William T. Camp
	Chief Financial Officer