| Business | Phone |
| Browns Farm Inn 887 Wolf Creek Rd, Winthrop 98862 | (509) 996-2571 |
| Big Picture Construction Po Box 1072, Winthrop 98862 | (509) 996-3715 |
| Cascade Foam & Coatings Inc 10 Airport Heights Rd, Winthrop 98862 | (509) 996-2803 |
| Rocky Mountain Log Homes 625 Highway 20, Winthrop 98862 | (509) 996-2554 |
| G L Palm Construction Herizon Flat Rd, Winthrop 98862 | (509) 996-2884 |
| Haverford Homes 18092 Highway 20, Winthrop 98862 | (509) 996-4112 |
| North Cascade Construction Inc 18526 State Route 20 B, Winthrop 98862 | (509) 996-3125 |
| Rhinehart Construction Winthrop 98862 | (509) 996-3396 |
| Shadowline Design & Constr Inc 4 Lower Bear Creek Rd, Winthrop 98862 | (509) 996-3200 |