| Business | Phone |
| Brian J Aponte 22 Franklin Dr, Smithtown 11787 | (631) 979-0374 |
| Benisch Dickson Inc 28 Willow Ridge Dr, Smithtown 11787 | (631) 265-4242 |
| Bjm Contracting Inc 5 Hemlock Ln, Smithtown 11787 | (631) 361-5490 |
| Manhattan Builders Contr Corp Smithtown 11787 | (631) 724-8632 |
| Busa Co 217a Mount Pleasant Rd, Smithtown 11787 | (631) 979-0447 |
| Callahan Construction Inc 777 Meadow Rd, Smithtown 11787 | (631) 265-4083 |
| Mc Crave Construction 51 Ridge Rd, Smithtown 11787 | (631) 360-0278 |
| Colby Co Construction 17 Tower Pl, Smithtown 11787 | (631) 360-5696 |
| My Boys Contracting 3 Cornwall Ln, Smithtown 11787 | (631) 368-6001 |
| Diesel Construction Llc 66 Atterbury Dr, Smithtown 11787 | (631) 361-9223 |
| E M Swenson Contracting Corp 20 Demont St, Smithtown 11787 | (631) 724-0372 |
| F K General Construction 18 Mcarthur Ln, Smithtown 11787 | (516) 681-3212 |
| Florence Construction Corp 401 W Main St, Smithtown 11787 | (631) 584-4460 |
| Perna Group Contracting Corp 452 Landing Ave, Smithtown 11787 | (631) 265-7687 |
| Hattenback Brothers 1034 W Jericho Tpke, Smithtown 11787 | (631) 462-0680 |
| Islander Construction 11 Rhoda Ave, Smithtown 11787 | (631) 361-9393 |
| Premier Csc Inc 83 Landing Ave, Smithtown 11787 | (631) 724-8200 |
| Realty & Development Boka 40 Ivy Hill Dr, Smithtown 11787 | (631) 724-3157 |
| Rene-Gade Construction Corp 5 Marlan Ct, Smithtown 11787 | (631) 265-3479 |
| Rjd Construction 150 Terry Rd, Smithtown 11787 | (631) 382-9400 |
| Rockmore Contracting Corp 26 Loft Rd, Smithtown 11787 | (631) 366-6200 |
| Larsen & Sons Constr Corp 180 E Main St # 302, Smithtown 11787 | (631) 724-6837 |
| Sls Construction Inc 1034 W Jericho Tpke, Smithtown 11787 | (631) 543-0511 |
| Swingline Construction Co 106 New York Ave, Smithtown 11787 | (631) 361-8616 |
| Trio Leasing Co Inc 59 Landing Ave, Smithtown 11787 | (631) 360-2153 |
| Tuscan Industries Corp 90 Lawrence Ave, Smithtown 11787 | (631) 366-3206 |
| X-Ray Locating Inc 21 Dartmouth Dr, Smithtown 11787 | (631) 979-2890 |