Exhibit 21

Liberty Property Trust

Liberty Philadelphia, LLC

Liberty Property Limited Partnership

Liberty Property Philadelphia Limited Partnership

Liberty Property Philadelphia Limited Partnership II

Liberty Property Philadelphia Corporation

Liberty Property Philadelphia Trust

Liberty/Comcast 1701 JFK Boulevard, L.P.

Liberty Property Philadelphia Limited Partnership IV West

Liberty Property Philadelphia Corporation IV East

Liberty Property Philadelphia Corporation IV West

Liberty Property Philadelphia Corporation V

Liberty Property Philadelphia Limited Partnership V

Liberty Property Philadelphia Limited Partnership VI

Liberty Property Development Corp.

Liberty Property Development Corp.- II

Liberty Special Purpose Trust

Liberty/Parkway 8^th & Walnut, LP

Liberty/Parkway 8^th & Walnut Trust

Liberty Property 19^th & Arch LP

Liberty Property 19^th & Arch Trust

LPT 19^th & Arch Limited LP

LPT 19^th & Arch Limited II LP

17A LLC

18A Hotel LLC

Liberty Property 18^th & Arch Hotel, LLC

18A Hotel Lender, LLC

18A LLC

18A Lender LLC

LPT 18^th & Arch Street GP, LLC

LPT 18^th & Arch Street Limited, LLC

Liberty Property 18^th & Arch, LP

Liberty Property Development Company IV-S, LLC

LPDC Holdings Corp.

LPDC Camden LLC

Camden Town Center, LLC

CTC Parent Holdings LLC

LP Malvern Limited Partnership

LP Malvern LLC

40 Liberty Boulevard, LLC

Land Holdings Realty LLC

Liberty Brokerage, LLC

Century Commerce Center, LLC

Liberty 357 Wilson, LLC

Rivers Business Commons Associates Limited Partnership

Liberty Property Philadelphia Navy Yard Limited Partnership

Liberty Property Philadelphia Navy Yard Corporation

Liberty Property/Synterra Limited Partnership

Liberty Venture I, LP

Liberty Venture I, LLC

Liberty Florence I Urban Renewal, LLC

Liberty Burlington Urban Renewal, LLC

Liberty 180 Dulty’s, LLC

Liberty 100 and 160 Dulty’s, LLC

Liberty Illinois, LP

Liberty Illinois Venture, LLC

L/S One Crescent Drive, LP

L/S One Crescent Drive, LLC

L/S Three Crescent Drive, LP

L/S Three Crescent Drive, LLC

L/S Five Crescent Drive, LP

L/S Five Crescent Drive, LLC

L/S 4775 League Island Blvd., LP

L/S 4775 League Island Blvd., LLC

L/S 26^th Street North, LP

L/S 26^th Street North, LLC

L/S 26^th Street South, LP

L/S 26^th Street South, LLC

L/S 150 Rouse Boulevard, LP

L/S 150 Rouse Boulevard, LLC

L/S 201 Rouse Boulevard, LP

L/S 201 Rouse Boulevard, LLC

L/S 1200 Intrepid Avenue LP

L/S 1200 Intrepid Avenue, LLC

L/S 351 Rouse Boulevard, LP

L/S 351 Rouse Boulevard, LLC

L/S 1050 Constitution Avenue, LP

L/S 1050 Constitution Avenue, LLC

L/S 400 Rouse Boulevard, LLC

Perryman 159, L.L.C.

Liberty Durham, LLC

Liberty Shopton A, LLC

Liberty Shopton B, LLC

Liberty 600 Industrial, G.P.

Liberty AIPO Limited Partnership

Liberty Washington, LP

Liberty Washington Venture, LLC

Liberty 1100 17^th Street, LP

Liberty 2100 M Street, LP

Republic 20^th Street LLC

Republic Property TRS LLC

RPLP I LLC

RPT 1425 Investors LP

RPT 1425 Holdings LLC

RPT 1425 New York Avenue LLC

Liberty 2130 Baldwin, LLC

Liberty 6675 Business Parkway, LLC

Liberty 6600 Business Parkway, LLC

Liberty Sandy Court, LLC

Liberty Baltimore Avenue, LLC

Liberty Indian Creek, LLC

Liberty 5801 Columbia Park, LLC

Liberty 9645 Gerwig, LLC

Liberty 8715 Bollman, LLC

Liberty 329-333 Herrod, LLC

Liberty 4 South Middlesex, LLC

Liberty 21 S. Middlesex, LLC

Liberty Beltsville 1, LLC

Liberty Beltsville 2, LLC

Liberty Beltsville 3, LLC

Liberty Business Parkway Holdings, LLC

Liberty - PA GP 4, LLC

Liberty 1475 Nitterhouse, LP

Liberty 7195 Grayson, LP

Liberty 7253 Grayson, LP

Liberty Desborough, LLC

Liberty Logix Park, LLC

Liberty Barton 150, LLC

Liberty Worcester LLC

Liberty Widnes, LLC

Liberty Northampton, LLC

Liberty Minworth Limited

Liberty Midpoint Limited

Silversword Properties Limited

Cambridge Medipark Limited

CBC Estate Management Limited

Liberty Property Trust UK Limited

Liberty Horsham Limited

Kings Hill Estate Management Company Limited

Rouse Kent (Residential) Limited

Kings Hill Property Management Limited

Kings Hill Residential Estate Management Company Limited

iCO Didsbury Limited

Kings Hill Unit Trust

Liberty Logistics Limited

Liberty Magnetic Park Limited

Liberty Logix Park Limited

Liberty Barton Limited

Liberty Eurocentral I Limited

Liberty Eurocentral II Limited

Liberty Newport Limited

Liberty Warrington Limited

Liberty Oldham Limited

Liberty Bermuda Park Limited

Liberty Stockport Limited

Liberty Worcester I Limited

Liberty Worcester II Limited

Liberty Worcester III Limited

Liberty Industrial I Limited

Liberty Industrial II Limited

Liberty Aldersgate Limited