| Business | Phone |
| Manzoni Real Estate 655 Route 25a, Mt Sinai 11766 | (631) 928-2900 |
| Coastline Real Estate 2 Mount Sinai Ave, Mt Sinai 11766 | (631) 474-5200 |
| Milani Home Inspections 50 Constantine Way, Mt Sinai 11766 | (631) 331-4011 |
| Innovative Systems Development 1 Gotham Ct, Mt Sinai 11766 | (631) 928-8272 |
| Pristine Properties Ec 516 Route 25a, Mt Sinai 11766 | (631) 474-5000 |
| Katsaros Brothers Realty 10 Grassland Cir, Mt Sinai 11766 | (631) 473-5907 |
| S & B Realty 28 N Country Rd, Mt Sinai 11766 | (631) 928-2889 |
| Sieger Agency Inc 575 Route 25a, Mt Sinai 11766 | (631) 473-2150 |
| Wo Chung Property 331 Route 25a, Mt Sinai 11766 | (631) 474-2408 |
| Yuk Realty 16 Griffin Dr, Mt Sinai 11766 | (631) 476-3581 |