Exhibit 21.1
| Subsidiary |
State of Organization | |
| 101 Carnegie Center Associates |
New Jersey | |
| 17M Acquisition Subsidiary LLC |
Delaware | |
| 17M Associates |
District of Columbia | |
| 191 Spring Street Trust |
Massachusetts | |
| 206 Associates Limited Partnership |
New Jersey | |
| 210 Associates Limited Partnership |
New Jersey | |
| 211 Associates Limited Partnership |
New Jersey | |
| 30 Shattuck Road LLC |
Delaware | |
| 40-46 Harvard Street Trust |
Massachusetts | |
| 738 Eighth Avenue LLC |
Delaware | |
| 90 Church Street Limited Partnership |
Delaware | |
| 91 Hartwell Avenue Trust |
Massachusetts | |
| 92 Hayden Avenue Trust |
Massachusetts | |
| Big Apple Associates Limited Partnership |
Delaware | |
| Boston Properties Limited Partnership |
Delaware | |
| Boston Properties LLC |
Delaware | |
| Boston Properties Management, Inc. |
Delaware | |
| Boston Properties Office Value-Added Fund, L.P. |
Delaware | |
| Boston Properties TRS, Inc. |
Delaware | |
| BP 111 Huntington Ave LLC |
Delaware | |
| BP 1330 Connecticut Avenue LLC |
Delaware | |
| BP 1333 New Hampshire Avenue LLC |
Delaware | |
| BP 140 Kendrick Street LLC |
Delaware | |
| BP 140 Kendrick Street Property LLC |
Delaware | |
| BP 20 F Street Limited Partnership |
Delaware | |
| BP 201 Spring Street LLC |
Delaware | |
| BP 280 Park Avenue LLC |
Delaware | |
| BP 280 Park Avenue Manager Corp. |
Delaware | |
| BP 280 Park Avenue Mezzanine LLC |
Delaware | |
| BP 399 Park Avenue LLC |
Delaware | |
| BP 8th Avenue Associates LLC |
Delaware | |
| BP Almaden Associates LLC |
Delaware | |
| BP Belvidere LLC |
Delaware | |
| BP Crane Meadow, L.L.C. |
Delaware | |
| BP EC West LLC |
Delaware | |
| BP EC1 Holdings LLC |
Delaware | |
| BP EC2 Holdings LLC |
Delaware | |
| BP EC3 Holdings LLC |
Delaware | |
| BP EC4 Holdings LLC |
Delaware | |
| BP Fan Pier Development LLC |
Delaware | |
| BP Fourth Avenue, L.L.C. |
Delaware | |
| BP Gateway Center LLC |
Delaware | |
| BP Hotel LLC |
Delaware | |
| BP II LLC |
Delaware | |
| BP III LLC |
Delaware | |
| BP Lex LLC |
Delaware | |
| BP Management, L.P. |
Delaware | |
| BP New Dominion Technology Office Park II, LLC |
Delaware | |
| BP Office Fund REIT, Inc. |
Maryland | |
| BP Office Value-Added LLC |
Delaware |
| Subsidiary |
State of Organization | |
| BP OFR LLC |
Delaware | |
| BP Prucenter Acquisition LLC |
Delaware | |
| BP Prucenter Development LLC |
Delaware | |
| BP Prucenter Fairfield LLC |
Delaware | |
| BP Realty New Jersey LLC |
New Jersey | |
| BP Reston Eastgate LLC |
Delaware | |
| BP Seven Cambridge Center LLC |
Delaware | |
| BP Supermarket LLC |
Delaware | |
| BP Weston Quarry LLC |
Delaware | |
| BP/CG Member I LLC |
Delaware | |
| BP/CG Member II LLC |
Delaware | |
| BP/CG Member III LLC |
Delaware | |
| BP/CGCenter Acquisition Co. LLC |
Delaware | |
| BP/CGCenter I LLC |
Delaware | |
| BP/CGCenter II LLC |
Delaware | |
| BP/CGCenter MM LLC |
Delaware | |
| BP/CGCenter MM2 LLC |
Delaware | |
| BP/CRF 265 Franklin Street Holdings LLC |
Delaware | |
| BP/CRF 265 Franklin Street LLC |
Delaware | |
| BP/CRF 265 Franklin Street Manager Corp. |
Delaware | |
| BP/CRF 265 Franklin Street Mezzanine LLC |
Delaware | |
| BP/CRF 901 New York Avenue LLC |
Delaware | |
| BP/DC Properties, Inc. |
Maryland | |
| BP/DC REIT LLC |
Delaware | |
| Cambridge Center North Trust |
Massachusetts | |
| Cambridge Center West Associates Limited Partnership |
Massachusetts | |
| Cambridge Center West Trust |
Massachusetts | |
| Carnegie 214 Associates Limited Partnership |
New Jersey | |
| Carnegie 504 Associates |
New Jersey | |
| Carnegie 506 Associates |
New Jersey | |
| Carnegie 508 Associates |
New Jersey | |
| Carnegie 510 Associates, L.L.C. |
Delaware | |
| Carnegie Center Associates |
New Jersey | |
| CRF Met Square LLC |
Delaware | |
| Decoverly Five Limited Partnership |
Maryland | |
| Decoverly Four Limited Partnership |
Maryland | |
| Democracy Associates Limited Partnership |
Maryland | |
| Democracy Financing, LLC |
Delaware | |
| Discovery Square, L.L.C. |
Delaware | |
| Downtown Boston Properties Trust |
Massachusetts | |
| East Pratt Street Associates Limited Partnership |
Maryland | |
| Elandzee Trust |
Massachusetts | |
| Eleven Cambridge Center Trust |
Massachusetts | |
| Embarcadero Center Associates |
California | |
| Embarcadero Center, Inc. |
California | |
| Four Embarcadero Center Venture |
California | |
| Fourteen Cambridge Center Trust |
Massachusetts | |
| Gateway Center LLC |
Delaware | |
| HarborPlace Boston LLC |
Delaware | |
| Hayden Office Trust |
Massachusetts | |
| IXP, Inc. |
Vermont | |
| Jones Road Development Associates LLC |
Delaware |
| Subsidiary |
State of Organization | |
| Lexreal Associates Limited Partnership |
New York | |
| LKE BP Fourth Avenue Limited Partnership |
Massachusetts | |
| Mall Road Trust |
Massachusetts | |
| Market Square North Associates Limited Partnership |
Delaware | |
| MBZ-Lex Trust |
Massachusetts | |
| MGA Virginia 85-1 Limited Partnership |
Virginia | |
| MGA Virginia 86-1 Limited Partnership |
Virginia | |
| MGA Virginia 86-2 Limited Partnership |
Virginia | |
| Montgomery Village Avenue Joint Venture Limited Partnership |
Maryland | |
| New Dominion Technology Corp. |
Delaware | |
| New Dominion Technology Park II LLC |
Delaware | |
| New Dominion Technology Park LLC |
Delaware | |
| New Jersey & H Street LLC |
Delaware | |
| No. 1 Times Square Development LLC |
Delaware | |
| No. 5 Times Square Development LLC |
Delaware | |
| Ocean View Development Company Limited Partnership |
District of Columbia | |
| One Cambridge Center Trust |
Massachusetts | |
| One Embarcadero Center Venture |
California | |
| One Freedom Square, L.L.C. |
Delaware | |
| Pratt Street Financing, LLC |
Delaware | |
| Princeton 202 Associates Limited Partnership |
New Jersey | |
| Princeton Childcare Associates Limited Partnership |
New Jersey | |
| Reston Corporate Center Limited Partnership |
Virginia | |
| Reston Town Center Office Park Phase One Limited Partnership |
Virginia | |
| Reston VA 939, L.L.C. |
Delaware | |
| School Street Associates Limited Partnership |
District of Columbia | |
| SCV Partners |
New Jersey | |
| Square 407 Limited Partnership |
District of Columbia | |
| Stony Brook Associates LLC |
Delaware | |
| Ten Cambridge Center Trust |
Massachusetts | |
| The Double B Partnership |
Massachusetts | |
| The Double B Trust |
Massachusetts | |
| The Metropolitan Square Associates LLC |
District of Columbia | |
| Three Cambridge Center Trust |
Massachusetts | |
| Three Embarcadero Center Venture |
California | |
| Tower Oaks Financing LLC |
Delaware | |
| Tracer Lane Trust II |
Massachusetts | |
| Two Cambridge Center Trust |
Massachusetts | |
| Two Freedom Square, L.L.C. |
Delaware | |
| Washingtonian North Associates Limited Partnership |
Maryland | |
| Wisconsin Place Office LLC |
Delaware | |
| Wisconsin Place Office Manager LLC |
Delaware | |
| Wisconsin Place Retail LLC |
Delaware | |
| Worldgate Member LLC |
Delaware | |
| Worldgate Plaza LLC |
Delaware | |
| WP Borrower LLC |
Delaware | |
| WP Owner Trust |
Delaware | |
| WP Trust |
Massachusetts | |
| WP Project Developer LLC |
Delaware | |
| WP Project Developer Trust |
Delaware | |
| Zee Bee Trust II |
Massachusetts | |
| Zee Em Trust II |
Massachusetts |