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**EXHIBIT21 PARENT AND SUBSIDIARIES OF REGISTRANT**

 

The subsidiaries of MARTare listed below.  All are engaged inthe ownership and/or development of commercial

real estate in the UnitedStates.  All are included in theconsolidated financial statements filed as part of this Annual

Report.

 
| **Name**                               |   | **State of Incorporation  or Formation** |   | **Interest** |   |
|----------------------------------------|--------|------------------------------------------|--------|--------------|--------|
|                                   |   |                                     |   |         |   |
| ***Corporations:***                    |   |                                     |   |         |   |
|                                   |   |                                     |   |         |   |
| Arundel Plaza Associates, Inc.         |   | Maryland                                 |   | 100          | %      |
| Brandywine Commons, Inc.               |   | Maryland                                 |   | 100          | %      |
| BTR Arkor, Inc.                        |   | Maryland                                 |   | 100          | %      |
| BTR Atlanta Daycare, Inc.              |   | Maryland                                 |   | 100          | %      |
| BTR Business Center, Inc.              |   | Maryland                                 |   | 100          | %      |
| BTR East Greenbush, Inc.               |   | Maryland                                 |   | 100          | %      |
| BTR Free State Bowls, Inc.             |   | Maryland                                 |   | 100          | %      |
| BTR Gateway, Inc.                      |   | Maryland                                 |   | 100          | %      |
| BTR Holdings, Inc.                     |   | Maryland                                 |   | 100          | %      |
| BTR Manassas, Inc.                     |   | Maryland                                 |   | 100          | %      |
| BTR New Ridge, Inc.                    |   | Maryland                                 |   | 100          | %      |
| BTR Northwood Properties, Inc.         |   | Maryland                                 |   | 100          | %      |
| BTR Odenton Properties, Inc.           |   | Maryland                                 |   | 100          | %      |
| BTR Salisbury, Inc.                    |   | Maryland                                 |   | 100          | %      |
| BTR Southdale, Inc.                    |   | Maryland                                 |   | 100          | %      |
| BTR Waldorf Development Corporation    |   | Maryland                                 |   | 100          | %      |
| BTR Waldorf Tire, Inc.                 |   | Maryland                                 |   | 100          | %      |
| Burke Town Plaza, Inc.                 |   | Maryland                                 |   | 100          | %      |
| Clinton Development Co., Inc.          |   | Maryland                                 |   | 100          | %      |
| Colonie Plaza, Inc.                    |   | Maryland                                 |   | 100          | %      |
| Columbia Plaza, Inc.                   |   | Maryland                                 |   | 100          | %      |
| Commonwealth Plaza, Inc.               |   | Maryland                                 |   | 100          | %      |
| Concourse Realty Management, Inc.      |   | Maryland                                 |   | 100          | %      |
| Davis Ford Properties, Inc.            |   | Maryland                                 |   | 100          | %      |
| Easton Shoppes, Inc.                   |   | Maryland                                 |   | 100          | %      |
| Essanwy, Inc.                          |   | Maryland                                 |   | 100          | %      |
| Fredericksburg Plaza, Inc.             |   | Maryland                                 |   | 100          | %      |
| Harrisonburg Plaza, Inc.               |   | Maryland                                 |   | 100          | %      |
| Kingston Crossing, Inc.                |   | Maryland                                 |   | 100          | %      |
| M&B Services Corp.                 |   | Maryland                                 |   | 100          | %      |
| MART Acquisition, Inc.                 |   | Maryland                                 |   | 100          | %      |
| New Town Village, Inc.                 |   | Maryland                                 |   | 100          | %      |
| North East Station, Inc.               |   | Maryland                                 |   | 100          | %      |
| Rolling Road Plaza, Inc.               |   | Maryland                                 |   | 100          | %      |
| Rosedale Partners, Inc.                |   | Maryland                                 |   | 100          | %      |
| Rosedale Plaza, Inc.                   |   | Maryland                                 |   | 100          | %      |
| Route 642 Properties, Inc.             |   | Maryland                                 |   | 100          | %      |
| Security Square Center, Inc.           |   | Maryland                                 |   | 100          | %      |
| Southwest Development Properties, Inc. |   | Maryland                                 |   | 100          | %      |
| Timonium Shopping Center, Inc.         |   | Maryland                                 |   | 100          | %      |
| Wake Plaza, Inc.                       |   | Maryland                                 |   | 100          | %      |
| Waverly Woods Center, Inc.             |   | Maryland                                 |   | 100          | %      |
| Wyaness, Inc.                          |   | Maryland                                 |   | 100          | %      |

 

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| ***Limited Liability  Companies:***      |   |     |   |   |   |
|------------------------------------------|--------|----------|--------|--------|--------|
|                                     |   |     |   |   |   |
| Dover Square, LLC                        |   | Maryland |   | 100    | %      |
| Fullerton Plaza, LLC                     |   | Maryland |   | 100    | %      |
| MART Glen Burnie, LLC                    |   | Maryland |   | 100    | %      |
| MART Greenbrier, LLC                     |   | Maryland |   | 100    | %      |
| MART Perry Hall, LLC                     |   | Maryland |   | 100    | %      |
| MART Saucon, LLC                         |   | Maryland |   | 100    | %      |
| Perry Hall Square, LLC                   |   | Maryland |   | 100    | %      |
| Pittsfield Center, LLC                   |   | Maryland |   | 100    | %      |
| Pottstown Plaza, LLC                     |   | Maryland |   | 100    | %      |
| Radcliffe, LLC                           |   | Maryland |   | 100    | %      |
| Ritchie, LLP                             |   | Maryland |   | 67     | %      |
| Rosedale, LLC                            |   | Maryland |   | 100    | %      |
| Round Hollow, LLC                        |   | Maryland |   | 100    | %      |
| Security Center, LLC                     |   | Maryland |   | 100    | %      |
| Shrewsbury Center, LLC                   |   | Maryland |   | 100    | %      |
| SSSC, LLC                                |   | Maryland |   | 100    | %      |
| Stonehedge Center, LLC                   |   | Maryland |   | 100    | %      |
| Stonehenge, LLC                          |   | Maryland |   | 100    | %      |
| Talton, LLC                              |   | Maryland |   | 100    | %      |
| Timonium Shopping Center Associates, LLC |   | Maryland |   | 100    | %      |
| WWC, LLC                                 |   | Maryland |   | 100    | %      |
| Yorkway Associates, LLC                  |   | Maryland |   | 100    | %      |

 

The following arepartnerships in which Mid-Atlantic Realty Trust has partnership interests:

 
| **Name**                           |   | **State of  Formation** |   | **Interest** |   |
|------------------------------------|--------|-------------------------|--------|--------------|--------|
| Kensington Associates              |   | Maryland                |   | 93           | %      |
| MART Limited Partnership           |   | Maryland                |   | 86           | %      |
| Northwood Limited Partnership      |   | Maryland                |   | 67           | %      |
| Rosedale Plaza Limited Partnership |   | Maryland                |   | 100          | %      |
| Saucon Valley Square, LP           |   | Maryland                |   | 100          | %      |
| Scotia Crossing Associates         |   | Maryland                |   | 50           | %      |
| Southdale Limited Partnership      |   | Maryland                |   | 50           | %      |
| Wyaness Associates                 |   | Maryland                |   | 100          | %      |

 

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