| Business | Phone |
| William Pitt Real Estate 279 Sound Beach Ave, Old Greenwich 6870 | (203) 637-9333 |
| William Raveis Real Estate 189 Sound Beach Ave, Old Greenwich 6870 | (203) 637-4324 |
| Chris Kriz Real Estate 44 Rockmere Ave, Old Greenwich 6870 | (203) 637-1415 |
| Coldwell Banker 278 Sound Beach Ave, Old Greenwich 6870 | (203) 637-4581 |
| Collins Property 51 Forest Ave, Old Greenwich 6870 | (203) 698-1569 |
| Cox Associates Realtors 28 Sound Beach Ave, Old Greenwich 6870 | (203) 637-4339 |
| Prudential Connecticut Realty 16 Arcadia Rd, Old Greenwich 6870 | (203) 637-1713 |
| Greenwich Custom Real Estate 200 Sound Beach Ave, Old Greenwich 6870 | (203) 698-4444 |
| Jay Burkhardt Real Estate 13 Arcadia Rd # 7, Old Greenwich 6870 | (203) 637-7997 |