| Business | Phone |
| Alisberg Parker Architects 222 Sound Beach Ave, Old Greenwich 6870 | (203) 637-8730 |
| Anthony Robins Intl 326 Sound Beach Ave, Old Greenwich 6870 | (203) 698-1484 |
| Edward G Davis 31 Park Ave, Old Greenwich 6870 | (203) 637-2748 |
| Edgewater Architects 15 Edgewater Dr, Old Greenwich 6870 | (203) 698-0226 |
| Charles Ginste 44 Tomac Ave, Old Greenwich 6870 | (203) 698-0723 |