| Business | Phone |
| Audette's Remodeling 1250 Memorial Dr, Winthrop 4364 | (207) 377-3175 |
| Bob Buck Builders 481 N Wayne Rd, Winthrop 4364 | (207) 377-8548 |
| H P Cummings Construction Co 19 Greenwood Park, Winthrop 4364 | (207) 377-2232 |
| Northeast Industrial Svc Co 40 Winada Dr, Winthrop 4364 | (207) 377-2522 |
| E A Pettengill Turkey Ln, Winthrop 4364 | (207) 377-2109 |
| S J Wood Construction Co 70 State Route 133, Winthrop 4364 | (207) 377-8543 |
| Siragusa Builders 119 Hubbard Ln, Winthrop 4364 | (207) 377-4722 |
| Stan Tompkins Builder & Dsgnr 66 Winthrop Center Rd, Winthrop 4364 | (207) 395-4152 |
| Thomas Builders Metcalf Rd, Winthrop 4364 | (207) 377-3857 |