| Business | Phone |
| True North Land Surveying 157 Yesler Way, Seattle 98104 | (206) 332-0800 |
| Patrick Leigh 1111 3rd Ave 3400, Seattle 98101 | (206) 937-0800 |
| Hebrank Steadman & Assoc 6564 5th Ave S, Seattle 98108 | (206) 762-4982 |
| John H Miller 1412 25th Ave E, Seattle 98112 | (206) 322-6736 |
| North Pointe Surveying Po Box 30758, Seattle 98113 | (206) 782-5778 |
| Property Line Surveys Seattle 98121 | (206) 728-2802 |
| Schroeter Surveyors 16016 Ambaum Blvd S, Seattle 98148 | (206) 242-6621 |
| Pacific Engineering Design Inc 4800 S 188th St 360, Seattle 98188 | (206) 431-7970 |