| Business | Phone |
| Design Construction Group Inc 8428 Hayden Ln, Annandale 22003 | (571) 332-3252 |
| Diesselhorst Group 8511 Virginia Ave, Annandale 22003 | (703) 764-0555 |
| Greenwich Architects 7006 Evergreen Ct, Annandale 22003 | (703) 333-5334 |
| Hodzic Architects 4300 Evergreen Ln 304, Annandale 22003 | (703) 941-0666 |