| Business | Phone |
| Alix Contracting Co 59 Railroad Ave, Ronkonkoma 11779 | (631) 467-0537 |
| All Island Purchase Corp 3075 Veterans Memorial Hwy, Ronkonkoma 11779 | (631) 232-3700 |
| All Island Recycle & Rbsh Rmvl 1821 Pond Rd, Ronkonkoma 11779 | (631) 244-7068 |
| Linear Enterprises 101 Christopher St, Ronkonkoma 11779 | (631) 737-4477 |
| Long Island Contractors Assoc 2805 Veterans Memorial Hwy # 2, Ronkonkoma 11779 | (631) 467-4230 |
| Barry Goggin Construction Corp 2140 Pond Rd, Ronkonkoma 11779 | (631) 981-4953 |
| Lvl Contracting Inc 535 Hawkins Ave, Ronkonkoma 11779 | (631) 471-6407 |
| C & A Construction Co 46 Vanderbilt Ave, Ronkonkoma 11779 | (631) 585-6953 |
| Cable Resources 101 Christopher St, Ronkonkoma 11779 | (631) 737-4900 |
| Celano Construction Corp 2009 Ocean Ave, Ronkonkoma 11779 | (631) 471-2793 |
| Covenant Carpentry Inc Ronkonkoma 11779 | (631) 467-1599 |
| Crestwood Carpentry Inc 1951 Ocean Ave, Ronkonkoma 11779 | (631) 737-2500 |
| D & A Structural Contractors 60 Raynor Ave, Ronkonkoma 11779 | (631) 471-2300 |
| Da Leo Construction 28 Raynor Ave # 4, Ronkonkoma 11779 | (631) 738-1159 |
| Deborah Forgione Constr Inc 361 Boulder St, Ronkonkoma 11779 | (631) 285-7944 |
| Double Check Builders Inc 270 Ronkonkoma Ave, Ronkonkoma 11779 | (631) 585-4444 |
| Exteriors Plus Ronkonkoma 11779 | (631) 467-4862 |
| Frank Derosa Construction 36 Charles Ct, Ronkonkoma 11779 | (631) 981-0483 |
| G C Construction Corp 2283 Elm Ave, Ronkonkoma 11779 | (631) 580-0435 |
| Gencon Construction 756 Koehler Ave # 6, Ronkonkoma 11779 | (631) 467-5435 |
| Godsell Contracting Inc 1899 Lakeland Ave # F, Ronkonkoma 11779 | (631) 467-3434 |
| Phoenix 4 Contracting Inc 2415 Chestnut Ave, Ronkonkoma 11779 | (631) 471-5200 |
| Infinity Remodeling Ronkonkoma 11779 | (631) 585-9549 |
| Intensive Care Contracting Ronkonkoma 11779 | (631) 580-2471 |
| Island Wide Alterations 10 Oaklake Ln, Ronkonkoma 11779 | (631) 234-4380 |
| Jual Construction Ltd 1833 Pond Rd, Ronkonkoma 11779 | (631) 285-7208 |
| Renco Construction Corp 2221 5th Ave # 13, Ronkonkoma 11779 | (631) 467-8811 |
| Kordun Construction Corp 575 Johnson Ave, Ronkonkoma 11779 | (631) 580-1178 |
| Legend Construction Co 4512 Express Dr S, Ronkonkoma 11779 | (631) 737-1170 |
| Swingline Construction Co 1863 Pond Rd # 6, Ronkonkoma 11779 | (631) 737-8020 |
| Tom Datre & Son Construction 2459 Ocean Ave, Ronkonkoma 11779 | (631) 981-5888 |
| Triple S Constr & Development 2090 Pond Rd, Ronkonkoma 11779 | (631) 580-1073 |
| Tristate Commercial Builders 2805 Veterans Memorial Hwy # 3, Ronkonkoma 11779 | (631) 467-3013 |
| True North Dev Union Ave, Ronkonkoma 11779 | (631) 588-2258 |
| Zem Associates Inc 7 15th St, Ronkonkoma 11779 | (631) 737-2700 |