| Business | Phone |
| Lloyd's Realty Corp 124 Front St, Greenport 11944 | (631) 477-2220 |
| Century 21 Agawan Albertson 110 Front St, Greenport 11944 | (631) 477-2733 |
| Dunemere Associates 10 Sterlington Commons, Greenport 11944 | (631) 477-2300 |
| Frank A Field 441 Main St, Greenport 11944 | (631) 477-2433 |
| Hahn Realty 120 Front St, Greenport 11944 | (631) 477-0551 |
| Kapell Real Estate Inc 400 Front St, Greenport 11944 | (631) 477-0100 |