| Business | Phone |
| Beatty Harvey & Assoc 127 E Main St, Riverhead 11901 | (631) 208-9655 |
| Donald A Denis 508 Main Rd, Riverhead 11901 | (631) 722-3511 |
| Peter Tokar Aia Architect 3718 Sound Ave, Riverhead 11901 | (631) 208-4097 |
| Gary Jacquemin 115 Griffing Ave, Riverhead 11901 | (631) 369-8630 |
| Martin Sendlewski 215 Roanoke Ave, Riverhead 11901 | (631) 727-5352 |
| Charles M Thomas 206 Lincoln St, Riverhead 11901 | (631) 727-7993 |