| Valley Paving | Kathleen Marie Ault | — | (707) 485 7505 | GC, remodel, ADU | Redwood Valley · Mendocino County | — | — |
| Van Ornum Construction | Harry James Van Ornum | — | (707) 964 6924 | GC, remodel, ADU | Fort Bragg · Mendocino County | — | — |
| Vanguard Homes | Vanguard Homes | — | (650) 339 0064 | GC, remodel, ADU | Potter Valley · Mendocino County | — | — |
| Veikko Properties INC | Joel Veikko Soinila | joelsoinila@veikkoproperties.com | (707) 391 7403 | GC, remodel, ADU | Ukiah · Mendocino County | — | — |
| Verdin Landscapes | Verdin Landscapes | — | (707) 357 7682 | Windows, patio, painters | Boonville · Mendocino County | — | — |
| Vernon Cook Construction | Vernon Ray Cook | — | (707) 367 4262 | GC, remodel, ADU | Gualala · Mendocino County | — | — |
| Vida Painting | Vida Painting | — | (707) 813 8278 | Windows, patio, painters | Fort Bragg · Mendocino County | — | — |
| Village Ecosystems INC | Anna Chapman Birkas | — | (707) 391 1761 | GC, remodel, ADU | Ukiah · Mendocino County | — | — |
| Vintage Construction | Patrick Joseph Duggan | — | (707) 671 5428 | GC, remodel, ADU | Ukiah · Mendocino County | — | — |
| Vision Painting & Coatings | Susan Margaret Saucedo-cortez | — | (707) 291 5257 | Windows, patio, painters | Redwood Valley · Mendocino County | — | — |
| W D Rand Landscaping | W D Rand Landscaping | — | (707) 367 5701 | Windows, patio, painters | Littleriver · Mendocino County | — | — |
| W P Hale Company | William Paylor Hale | — | (707) 391 8113 | Electricians | Redwood Valley · Mendocino County | — | — |
| W S Jensen Construction | William Shane Jensen | — | (707) 391 7214 | GC, remodel, ADU | Redwood Valley · Mendocino County | — | — |
| Wade General Engineering | Wade General Engineering | — | (707) 972 0871 | Other | Redwood Valley · Mendocino County | — | — |
| Waggoners Custom Construction | Steven Mark Waggoner | — | (707) 489 6908 | GC, remodel, ADU | Willits · Mendocino County | — | — |
| Wake Mechanical Services | Lloyd Wesley Wake | — | (707) 459 6753 | HVAC | Willits · Mendocino County | — | — |
| Walker Enterprises | Christopher James Walker | — | (707) 548 2585 | GC, remodel, ADU | Fort Bragg · Mendocino County | — | — |
| Wall Construction LLC | Jeffrey Alan Wall | — | (707) 357 2723 | GC, remodel, ADU | Littleriver · Mendocino County | — | — |
| Walsh Plumbing | Walsh Plumbing | — | (707) 262 2631 | Other | Willits · Mendocino County | — | — |
| Walter Nemeth | Walter Nemeth | — | (707) 964 9038 | Other | Fort Bragg · Mendocino County | — | — |
| Warner Construction Concepts | Greggory Todd Warner | — | (707) 884 4322 | GC, remodel, ADU | Gualala · Mendocino County | — | — |
| Watkins Sand & Gravel | Watkins Sand & Gravel | — | (707) 964 5138 | Other | Fort Bragg · Mendocino County | — | — |
| Wayne Gordon Construction | Wayne Thomas Gordon | — | (707) 489 7085 | GC, remodel, ADU | Mendocino · Mendocino County | — | — |
| Wayne Rogina | Wayne Rogina | — | (707) 621 0062 | GC, remodel, ADU | Talmage · Mendocino County | — | — |
| Wedge Construction | Michael Jason Suddith | — | (707) 882 3226 | GC, remodel, ADU | Point Arena · Mendocino County | — | — |
| West Coast Forestry INC | Kip Paul Ford | team@latofonts.com | (707) 845 0020 | Tree | Ukiah · Mendocino County | — | — |
| West Coast Landscaping | West Coast Landscaping | — | (707) 357 1078 | Windows, patio, painters | Fort Bragg · Mendocino County | — | — |
| Weston Coast Construction | Brian Douglas Weston | — | (707) 593 7866 | GC, remodel, ADU | Elk · Mendocino County | — | — |
| What A Good Idea Enterprise | Brent Barrett Klopfer | — | (707) 884 9539 | GC, remodel, ADU | Gualala · Mendocino County | — | — |
| White Barn General Contracting Electrical | Eric Ryan Jackson | — | (707) 684 0464 | Electricians | Gualala · Mendocino County | — | — |
| Whites Painting | Whites Painting | — | (707) 350 1569 | GC, remodel, ADU | Ukiah · Mendocino County | — | — |
| Wide Open Land Management | Wide Open Land Management | eben@eyebytes.com | (707) 391 1450 | Tree | Redwood Valley · Mendocino County | — | — |
| Wilderness Electric | Gary Clay Matlock | office@wildernesselectric.com | (707) 972 5443 | Electricians | Ukiah · Mendocino County | — | — |
| Wildwood Building Company | Jake Daniel Hansen | — | (559) 719 8565 | GC, remodel, ADU | Ukiah · Mendocino County | — | — |
| Will Guyan | Will Guyan | — | (707) 972 4901 | GC, remodel, ADU | Gualala · Mendocino County | — | — |
| William F Pell | William F Pell | — | (707) 489 3410 | GC, remodel, ADU | Mendocino · Mendocino County | — | — |
| William Mccoy DBA Trm General Builder | Trm General Builder | — | (707) 391 9639 | GC, remodel, ADU | Ukiah · Mendocino County | — | — |
| William Turner Construction | William Allen Turner | — | (650) 703 5647 | GC, remodel, ADU | Willits · Mendocino County | — | — |
| Williams Electric | Williams Electric | — | (707) 937-4415 | Electricians | Mendocino · Mendocino County | — | — |
| Willits Pump Service | Steven Wayne Hansen | — | (707) 489 2369 | Other | Willits · Mendocino County | — | — |