| Turners Carpets Etc INC | Kenneth Gene Turner | — | (530) 938 3285 | Other | Weed · Siskiyou County | — | — |
| Tyler Construction | David Allen Tyler | — | (530) 905 0534 | Other | Yreka · Siskiyou County | — | — |
| Valdez Construction | Daren Keith Valdez | info@valdezpropertyconstruction.com | (530) 938 1056 | GC, remodel, ADU | Weed · Siskiyou County | — | — |
| Valley Concepts Painting | Valley Concepts Painting | impallari@gmail.com | (925) 497 5667 | Windows, patio, painters | Etna · Siskiyou County | — | — |
| Van Hooser Construction | Nieman Reginald Van Hooser | — | (530) 859 3496 | GC, remodel, ADU | Dunsmuir · Siskiyou County | — | — |
| Vickers Construction | Brian Andrew Vickers | info@vickersconstruction.com | (530) 925 0822 | GC, remodel, ADU | Mt Shasta · Siskiyou County | — | — |
| Volf Construction | Roger J Volf | — | (530) 938 2025 | GC, remodel, ADU | Weed · Siskiyou County | — | — |
| Watson Construction | Matthew Wade Watson | — | (508) 294-3171 | GC, remodel, ADU | Mc Cloud · Siskiyou County | — | — |
| Watson Enterprises | Daniel Ray Watson | — | (530) 515 4876 | GC, remodel, ADU | Mc Cloud · Siskiyou County | — | — |
| Wd Heavy Equipment LP | Adam Xavier Daniels | — | (530) 598 1321 | Other | Fort Jones · Siskiyou County | — | — |
| Weddle Plumbing | Weddle Plumbing | — | (530) 598 6856 | Other | Yreka · Siskiyou County | — | — |
| Wes Hanna's Floor Covering | Wes Hanna's Floor Covering | — | (530) 340 7705 | Other | Yreka · Siskiyou County | — | — |
| West Coast Paving & Chip Sealing INC | Aaron M West | — | (530) 842 7283 | Other | Yreka · Siskiyou County | — | — |
| Westward Building | Timothy Martin Pfeiffer | — | (530) 925 1072 | GC, remodel, ADU | Weed · Siskiyou County | — | — |
| Whipple Electric | Keith Wallace Whipple | — | (530) 598 5833 | Electricians | Etna · Siskiyou County | — | — |
| Whitchurch Construction | Clint Anthony Whitchurch | — | (530) 598 8263 | GC, remodel, ADU | Etna · Siskiyou County | — | — |
| Whithaus Painting | Dale Milton Whithaus | — | (530) 598 1471 | Windows, patio, painters | Hornbrook · Siskiyou County | — | — |
| Whitlow Enterprises | Charles Stanton Whitlow | — | (530) 356 6477 | GC, remodel, ADU | Montague · Siskiyou County | — | — |
| Wilden Heating And Air | Wilden Heating And Air | — | (530) 926 0310 | HVAC | Mt Shasta · Siskiyou County | — | — |
| Wildwood Forestry LLC | Gabriel Jacob Lee Malek | — | (530) 564 5735 | Other | Yreka · Siskiyou County | — | — |
| Will Johnson Electric | William James Johnson | — | (530) 598 8361 | Electricians | Greenview · Siskiyou County | — | — |
| William Briggs | William Briggs | — | (530) 905 3336 | Other | Montague · Siskiyou County | — | — |
| William John Willison Iii | William John Willison Iii | — | (530) 340 0652 | Other | Yreka · Siskiyou County | — | — |
| Willis Spencer Construction | Willis Eugene Spencer | — | (530) 905 2557 | GC, remodel, ADU | Yreka · Siskiyou County | — | — |
| Wilson Drywall | Wilson Drywall | — | (530) 905 2536 | Other | Montague · Siskiyou County | — | — |
| Wonderland INC | Dylan William Coleman | — | (530) 925 2586 | GC, remodel, ADU | Mount Shasta · Siskiyou County | — | — |
| Wood's Construction Northstate INC | Nicholas Abraham Wood | — | (530) 570 7339 | GC, remodel, ADU | Yreka · Siskiyou County | — | — |
| Woods Plumbing | Woods Plumbing | — | (530) 366 1902 | Other | Yreka · Siskiyou County | — | — |
| Woody's Backhoe And Excavation | Woody's Backhoe And Excavation | — | (530) 340 0449 | Other | Montague · Siskiyou County | — | — |
| Wostenberg Window & Glass | Wostenberg Window & Glass | — | (530) 643 1594 | Windows, patio, painters | Montague · Siskiyou County | — | — |
| Yreka Glass | Yreka Glass | — | (530) 340 1480 | Windows, patio, painters | Yreka · Siskiyou County | — | — |
| Zarzynski Painting | Zarzynski Painting | — | (530) 938-4371 | Windows, patio, painters | Weed · Siskiyou County | — | — |
| Zimbelman Construction | Timothy Lloyd Zimbelman | — | (530) 340 2564 | GC, remodel, ADU | Yreka · Siskiyou County | — | — |