| Business | Phone |
| Scott Baker Atlantic Ave, Sag Harbor 11963 | (631) 725-2306 |
| Bates Masi Architects 138 Main St, Sag Harbor 11963 | (631) 725-0229 |
| D & D Harvey Architects 17 Shelter Island Ave, Sag Harbor 11963 | (631) 725-0255 |
| Maxine Nachtigal Liao 12 Jessey Halsey Ln, Sag Harbor 11963 | (631) 725-9321 |
| Charles Egosi Main, Sag Harbor 11963 | (631) 725-1244 |
| Christopher Griese 16 Cedar Dr, Sag Harbor 11963 | (631) 725-8999 |
| Harry Fischman Design Inc 35 Main St, Sag Harbor 11963 | (631) 725-4110 |
| Thomas H Heine 38 Archibald Way, Sag Harbor 11963 | (631) 725-1036 |
| William B Hess 19 Shore Rd, Sag Harbor 11963 | (631) 725-4883 |
| James Merrell Architects 66 Main St, Sag Harbor 11963 | (631) 725-9842 |
| A James Laspesa 3334 Noyac Rd, Sag Harbor 11963 | (631) 725-8848 |
| Lee Architecture Hampton, Sag Harbor 11963 | (631) 725-9468 |