Exhibit 21

Liberty Property Trust

Liberty Property Limited Partnership

Liberty Lehigh Partnership

Liberty Property Philadelphia Limited Partnership

Liberty Property Philadelphia Limited Partnership II

Liberty Property Philadelphia Corporation

Liberty Property Philadelphia Trust

Liberty/Commerz 1701 JFK Boulevard, L.P.

Liberty Property Philadelphia Limited Partnership IV West

Liberty Property Philadelphia Corporation IV East

Liberty Property Philadelphia Corporation IV West

Liberty Property Philadelphia Corporation V

Liberty Property Philadelphia Limited Partnership V

Liberty Property Philadelphia Limited Partnership VI

Liberty Property Philadelphia Trust VI

Liberty Property Development Corp.

Liberty Property Development Corp. II

Liberty Special Purpose Trust

Liberty/Parkway 8^th & Walnut, LP

Liberty/Parkway 8^th & Walnut Trust

Liberty Property 19^th & Arch LP

Liberty Property 19^th & Arch Trust

LP Malvern Limited Partnership

LP Malvern LLC

40 Liberty Boulevard, LLC

Land Holdings Realty LLC

Rivers Business Commons Associates Limited Partnership

Liberty Property Philadelphia Navy Yard Limited Partnership

Liberty Property Philadelphia Navy Yard Corporation

Liberty Property/Synterra Limited Partnership

Liberty Venture I, LP

Liberty Venture I, LLC

Liberty Illinois, LP

Liberty Illinois Venture, LLC

L/S One Crescent Drive, LP

L/S One Crescent Drive, LLC

L/S Three Crescent Drive, LP

L/S Three Crescent Drive, LLC

L/S 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

Liberty Property Philadelphia Development/Management, LP

Liberty West Allis, LLC

Liberty Deer Park, LLC

Liberty Delaware, LLC

Liberty Cotton Center, LLC

Liberty Cotton Center II, LLC

Liberty Property Lux, LLC

Annapolis Development, LLC

9755 Patuxent Woods Drive Trust

Perryman 159, L.L.C.

Liberty Stoneridge, LLC

Liberty Durham, LLC

Liberty 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

Republic 20^th Street LLC

Republic Property TRS LLC

Republic Park LLC

RKB CP IV LLC

RKB Lakeside Manager LLC

RKB Lakeside LLC

RKB Corporate Oaks LLC

RPT Presidents Park LLC

Presidents Park I LLC

Presidents Park II LLC

Presidents Park III LLC

RKB Pender LLC

RPLP I LLC

RPT 1425 Investors LP

RPT 1425 Holdings LLC

RPT 1425 New York Avenue LLC

RKB WillowWood Manager LLC

RKB WillowWood LLC

RPB WillowWood I LLC

RPB WillowWood II LLC

Silversword Properties Limited

Cambridge Medipark Limited

CBC Estate Management Limited

Liberty Property Trust UK Limited

Kings Hill Estate Management Company Limited

Kings Hill Sports Management 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 Property Trust Lux Sarl

Blythe Valley JV Sarl

BVP I Sarl

BVP II Sarl

Blythe Valley Innovation Centre Ltd.

BVP Management Co. Ltd.