| Business | Phone |
| Chart Assoc 29 Cleary Rd, Lake Ronkonkoma 11779 | (631) 467-2442 |
| Joseph A Malenda Real Estate 335 Smith Rd, Lake Ronkonkoma 11779 | (631) 467-2088 |
| Lake Shore Terrace Corp 316 Portion Rd, Lake Ronkonkoma 11779 | (631) 474-2539 |
| Serv U Realty 270 Ronkonkoma Ave, Lake Ronkonkoma 11779 | (631) 981-8585 |
| Straub Resales Inc 477 Hawkins Ave, Lake Ronkonkoma 11779 | (631) 981-3101 |
| Unique Home Sales 310 Portion Rd, Lake Ronkonkoma 11779 | (631) 619-4007 |