| Business | Phone |
| A 1 Commercial Real Estate 7 Meroke Ln, East Islip 11730 | (631) 587-7500 |
| Coldwell Banker 64 E Main St, East Islip 11730 | (631) 277-2220 |
| Moorings Development Corp The Helm, East Islip 11730 | (631) 581-9566 |
| Dutch Door Realty 103 W Main St, East Islip 11730 | (631) 859-3444 |
| Prudential Douglas Elliman 100 W Main St, East Islip 11730 | (631) 581-8855 |
| Real Estate Plus Inc 47 Division Ave, East Islip 11730 | (631) 277-3500 |
| Realty Plaza Enterprises Llc 7 Meroke Ln, East Islip 11730 | (631) 859-1700 |
| John Potter Real Estate 44 E Main St, East Islip 11730 | (631) 581-2800 |
| Selmar Realty 96 E Main St, East Islip 11730 | (631) 277-0900 |