| Continental Can | Seattle | WA |
| Cook Street | Spokane | WA |
| Cooper George Senior Living | Spokane | WA |
| Copalis Lumber | Carlisle | WA |
| Covey Laundry Service | Seattle | WA |
| Crim - Acoustic Pads | Seattle | WA |
| Crown Columbia Pulp & Paper | Camas | WA |
| Crown Hill Elementary School | Seattle | WA |
| Crown Willamette Paper | Camas | WA |
| Crown Zellerbach | Port Angeles | WA |
| Crown Zellerbach | Camas | WA |
| Crown Zellerbach | Port Townsend | WA |
| Crown Zellerbach | Seattle | WA |
| Dabney Mack | Aberdeen | WA |
| Daishowa America | Port Angeles | WA |
| Day Elementary School | Seattle | WA |
| Dean's Tavern | Tacoma | WA |
| Dearborn Park School | Seattle | WA |
| Denny Renton Clay & Coal | Seattle | WA |
| Department Of Public Institutions | Chehalis | WA |
| Department Of Public Institutions | Walla Walla | WA |
| Diamond Ice & Storage | Seattle | WA |
| Doctor Origene's Residence | Tacoma | WA |
| Doric Hotel | Tacoma | WA |
| Douglas United Nuclear | Richland | WA |
| Douglas United Nuclear | Hanford | WA |
| Dow Chemical | Kalama | WA |
| Downs Northwest Diebold | Seattle | WA |
| Downtown Bon Marche | Seattle | WA |
| Dulien Steel Products Of Washington | Seattle | WA |
| Dunlap Elementary School | Seattle | WA |
| DuPont | Hanford | WA |
| DuPont | Tacoma | WA |
| Duwamish Shipyard | Seattle | WA |
| E.A. Nord | Everett | WA |
| East Central Community Center | Spokane | WA |
| Eastern Cold Storage | Seattle | WA |
| Eastern Railway & Lumber | Centralia | WA |
| Eastern State Hospital | Medical Lake | WA |
| Eastern Washington Hospital for the Insane | Medical Lake | WA |
| Eastern Washington State College | Cheney | WA |
| Eastern Washington University | Cheney | WA |
| Edmonds Public Works | Edmonds | WA |
| EJ Bartells | Seattle | WA |
| EJ Bartells | Spokane | WA |
| EJ Bartells | Renton | WA |
| E.K. Wood Lumber | Anacortes | WA |
| E.K. Wood Lumber | Bellingham | WA |
| E.K. Wood Lumber | Hoquiam | WA |
| Elkstein J.High School | Seattle | WA |
