| # | Company name | Role | # of projects |
|---|---|---|---|
| 1 | Lohan Anderson, LLC | Architect | 18 |
| 2 | L & S Builders Design | Architect | 2 |
| 3 | L & V Architecture & Planning | Architect | 1 |
| 4 | L A G Prichard Limited | Architect | 1 |
| 5 | L A S Associates | Architect | 1 |
| 6 | L B Herbst & Associates | Architect | 1 |
| 7 | L D Oliver & Assoc Inc | Architect | 1 |
| 8 | L G A | Architect | 0 |
| 9 | L J Fan Design | Architect | 2 |
| 10 | L James Robison & Associates Architects | Architect | 1 |
| 11 | L K Travis & Associate Inc. | Architect | 1 |
| 12 | L Kersey | Architect | 0 |
| 13 | L M Architects & Associates | Architect | 4 |
| 14 | L R Niemiec Assocs | Architect | 0 |
| 15 | L Robert Kimball & Associates | Architect | 0 |
| 16 | L Robert Kimball & Associates (Pittsburgh) | Architect | 1 |
| 17 | L Robert Kimball & Associates Inc | Architect | 0 |
| 18 | L Robert Kimball And Associates | Architect | 0 |
| 19 | L S Johnston Architects | Architect | 3 |
| 20 | L Squared | Architect | 2 |