| ASD | Firms (Office Location) |
| Ayers Saint Gross | Firms (Office Location) |
| BBG-BBGM | Firms (Office Location) |
| Cannon Design | Firms (Office Location) |
| Clark Nexsen | Firms (Office Location) |
| Cooper Carry | Firms (Office Location) |
| Corcoran Gallery of Art | Art Museums |
| CORE Architecture + Design | Firms (Headquarters) |
| EwingCole | Firms (Office Location) |
| EYP Architecture & Engineering | Firms (Office Location) |
| Fanning/Howey Associates | Firms (Office Location) |
| Fentress Architects | Firms (Office Location) |
| FOX Architects | Firms (Office Location) |
| Freer Gallery Art | Art Museums |
| FXFOWLE Architects | Firms (Office Location) |
| Gensler | Firms (Office Location) |
| gkkworks | Firms (Office Location) |
| HGA Architects and Engineers | Firms (Office Location) |
| Hickok Cole Architects | Firms (Headquarters) |
| Hirshhorn Museum and Sculpture Garden | Art Museums |
| HKS, Inc. | Firms (Office Location) |
| HOK | Firms (Office Location) |
| Jonathan Nehmer + Associates | Firms (Headquarters) |
| KlingStubbins | Firms (Office Location) |
| Kreeger Museum | Art Museums |
| L. R. Kimball (Architecture) | Firms (Office Location) |
| Lehman Smith McLeish | Firms (Headquarters) |
| LEO A DALY | Firms (Office Location) |
| Mancini - Duffy | Firms (Office Location) |
| McKissack & McKissack | Firms (Headquarters) |
| Moody - Nolan | Firms (Office Location) |
| MulvannyG2 Architecture | Firms (Office Location) |
| National Aquarium | Aquariums |
| National Gallery of Art, East Building | Art Museums |
| National Gallery of Art, West Building | Art Museums |
| National Portrait Gallery and American Art Museum | Art Museums |
| Nationals Park | Baseball Stadiums |
| PageSoutherlandPage | Firms (Office Location) |
| Perkins + Will | Firms (Office Location) |
| Perkins Eastman | Firms (Office Location) |
| Perkowitz+Ruth Architects | Firms (Office Location) |
| Renwick Gallery | Art Museums |
| RMJM | Firms (Office Location) |
| RNL | Firms (Office Location) |
| Ronald Reagan Washington National Airport (DCA), North Terminal | Airports |
| RTKL Associates Inc. | Firms (Office Location) |
| Shalom Baranes Associates | Firms (Headquarters) |
| SHW Group | Firms (Office Location) |
| Skidmore, Owings & Merrill | Firms (Office Location) |
| SmithGroupJJR | Firms (Office Location) |
| SSOE Group | Firms (Office Location) |
| Stantec Inc. | Firms (Office Location) |
| STUDIOS Architecture | Firms (Headquarters) |
| Swanke Hayden Connell Architects | Firms (Office Location) |
| Torti Gallas and Partners | Firms (Office Location) |
| Verizon Center | Basketball Stadiums |
| Verizon Center | Hockey Arenas |
| VOA Associates | Firms (Office Location) |
| Washington Convention Center | Convention Centers |
| WDG Architecture | Firms (Headquarters) |
| WHR Architects | Firms (Office Location) |
| ZGF Architects | Firms (Office Location) |
