| Robert Gray Elementary School | Longview | WA |
| Rockwell Manufacturing | Richland | WA |
| Rocky Beach Dam | Wenatchee | WA |
| Rogers Olympic | Seattle | WA |
| Roosevelt Hotel | Seattle | WA |
| Roosevelt School | Seattle | WA |
| Roslyn Fuel | Roslyn | WA |
| Sacred Heart Medical Center | Spokane | WA |
| Safeco Insurance Building | Seattle | WA |
| Safeway | Seattle | WA |
| Safeway | Wenatchee | WA |
| Saidor | Tacoma | WA |
| Saint Andrews Bay | Tacoma | WA |
| Saint Charles Borromeo | Tacoma | WA |
| Saint Elizabeth Hospital | Yakima | WA |
| Saint Helens Pulp & Paper | Seattle | WA |
| Saint John Hospital | Longview | WA |
| Saint Johns Hospital | Longview | WA |
| Saint Joseph Bay | Tacoma | WA |
| Saint Joseph Hospital | Tacoma | WA |
| Saint Joseph Medical Center | Tacoma | WA |
| Saint Lo | Vancouver | WA |
| Saint Paul & Tacoma Lumber | Tacoma | WA |
| Saint Paul Tacoma Lumber | Tacoma | WA |
| Saint Peters Methodist Church | Bellevue | WA |
| Saint Regis Paper | Klickitat | WA |
| Saint Regis Paper | Tacoma | WA |
| Salerno Bay | Tacoma | WA |
| Saltars Point Elementary School | Steilacoom | WA |
| Sand Point Rehabilitation | Seattle | WA |
| Scott Paper | Anacortes | WA |
| Scott Paper | Everett | WA |
| Scott Paper | Chester | WA |
| Seaborne Shipyards | Tacoma | WA |
| Sea Land | Seattle | WA |
| Sea Lift | Seattle | WA |
| Sears, Roebuck & Company | Seattle | WA |
| Seattle Boiler Works | Seattle | WA |
| Seattle Brewing & Malting | Seattle | WA |
| Seattle Center | Seattle | WA |
| Seattle Childrens Orthopedic Hospital | Seattle | WA |
| Seattle City Light | Seattle | WA |
| Seattle Electric | Seattle | WA |
| Seattle First National Bank | Seattle | WA |
| Seattle First National Bank | Bellevue | WA |
| Seattle Gas | Seattle | WA |
| Seattle Linen | Seattle | WA |
| Seattle Naval Station Puget Sound | Seattle | WA |
| Seattle Pacific College | Seattle | WA |
| Seattle Preparatory School | Seattle | WA |
