| Business | Phone |
| Adelaide Byers Real Estate 67 Main St, Northport 11768 | (631) 261-6700 |
| Frederick E Beyer 281 Main St, Northport 11768 | (631) 261-6767 |
| Circa Real Estate Inc 66 Gilbert St, Northport 11768 | (631) 757-7200 |
| Peppermill Of Northport 812 Fort Salonga Rd, Northport 11768 | (631) 757-4300 |
| Pinnacle Appraisal Group 103 Fort Salonga Rd, Northport 11768 | (631) 754-5444 |
| Residential Appraisal Svc 46 Woodbine Ave, Northport 11768 | (631) 757-4053 |