| Weaver Masonry | Weaver Masonry | info@weavermasonry.com | (805) 467 3675 | Other | Paso Robles · San Luis Obispo County | — | — |
| Wells Concrete Works | Wells Concrete Works | — | (805) 215 8302 | Other | Los Osos · San Luis Obispo County | — | — |
| Wentzel Synthetic Irrigation | Wentzel Synthetic Irrigation | — | (805) 674 4333 | Other | Atascadero · San Luis Obispo County | — | — |
| Wes Construction & Woodworking INC | Cain Roger Marshall | — | (805) 400 4336 | GC, remodel, ADU | Templeton · San Luis Obispo County | — | — |
| Wesco Electric INC | Kai Channin Silva | — | (805) 781 0129 | Electricians | Atascadero · San Luis Obispo County | — | — |
| Wesley Torell Construction INC | Torell Wesley | — | (805) 909 1044 | GC, remodel, ADU | Cambria · San Luis Obispo County | — | — |
| West Coast Construction Co INC | Beverley Lynne Pratt | — | (805) 543 0647 | GC, remodel, ADU | San Luis Obispo · San Luis Obispo County | — | — |
| West Coast Energy Contractors DBA West Coast Energy Upgrade | Fawna Amber Weaver | — | (919) 710 0453 | GC, remodel, ADU | Paso Robles · San Luis Obispo County | — | — |
| West Coast Tech Electric | Allen Eugene Sherfield | — | (805) 473 9378 | Electricians | Arroyo Grande · San Luis Obispo County | — | — |
| West Coast Tree Service | Gergorio Celdon Avila | — | (805) 550 5489 | Tree | Cambria · San Luis Obispo County | — | — |
| West Pacific Electric Company Corporation | Villa | — | (805) 709 1385 | Electricians | Pismo Beach · San Luis Obispo County | — | — |
| West Stopests Pest Control | West Stopests Pest Control | — | (805) 888-1657 | Pest, tile roofs | Grover Beach · San Luis Obispo County | — | — |
| Westbeach Construction | Christian Wayne Wertz | — | (805) 431 2069 | GC, remodel, ADU | Arroyo Grande · San Luis Obispo County | — | — |
| Westco Business LLC | Timothy Douglas Edwards | — | (805) 242 9322 | GC, remodel, ADU | Morro Bay · San Luis Obispo County | — | — |
| Westerling Electric INC | Jeremy Victor Westerling | — | (805) 909 7377 | Electricians | Paso Robles · San Luis Obispo County | — | — |
| Western Classic Development | Western Classic Development | — | (805) 286 6327 | GC, remodel, ADU | Paso Robles · San Luis Obispo County | — | — |
| Western Construction INC | Charles Elmore Litten | — | (805) 448 3746 | GC, remodel, ADU | Arroyo Grande · San Luis Obispo County | — | — |
| Western Fence Co | Joseph Andrew Serna | — | (805) 674 2567 | Other | Atascadero · San Luis Obispo County | — | — |
| Western Hauling | Western Hauling | — | (805) 927 0946 | Other | Cambria · San Luis Obispo County | — | — |
| Western Industrial LLC | Nathan Arthur Williams | — | (805) 975 2070 | GC, remodel, ADU | Paso Robles · San Luis Obispo County | — | — |
| Westport Construction | Da Rosa Thomas | — | (805) 710 0417 | GC, remodel, ADU | Arroyo Grande · San Luis Obispo County | — | — |
| Westwoods Carpentry | Westwoods Carpentry | — | (805) 471 4902 | GC, remodel, ADU | Santa Margarita · San Luis Obispo County | — | — |
| Wet Meadows Institute LLC | Brian Charles Clark | — | (408) 903 3219 | Other | Templeton · San Luis Obispo County | — | — |
| Wheeler Construction | Tobias Quinn Wheeler | — | (805) 801 2460 | Other | Templeton · San Luis Obispo County | — | — |
| Wheeler Landscape | Wheeler Landscape | — | (805) 460 6586 | Windows, patio, painters | Atascadero · San Luis Obispo County | — | — |
| Whirlwind Excavating | Whirlwind Excavating | — | (805) 235 0400 | Other | Templeton · San Luis Obispo County | — | — |
| Whitaker Construction Group INC | Magdalena Hernandez | — | (805) 226 4020 | Other | Paso Robles · San Luis Obispo County | — | — |
| White Horse Plumbing LLC | Adian Macshane Atwell-Duryea | — | (805) 215 8081 | Other | San Luis Obispo · San Luis Obispo County | — | — |
| White's HVAC Services INC | Michael Loren White | — | (805) 801 0167 | HVAC | Nipomo · San Luis Obispo County | — | — |
| Whitford Custom Homes | Whitford Custom Homes | — | (805) 709 7213 | GC, remodel, ADU | Arroyo Grande · San Luis Obispo County | — | — |
| Whittle Fire Protection | John Kenneth Whittle | office@whittlefire.com | (805) 929 4400 | Other | Nipomo · San Luis Obispo County | — | — |
| Wicks | Garrett Christopher Gunning | — | (805) 965 5122 | Other roofers | Nipomo · San Luis Obispo County | — | — |
| Wilber Construction | Thomas Myrl Wilber | — | (805) 467 9134 | Other | Paso Robles · San Luis Obispo County | — | — |
| Wilber Construction INC | Elisha Rachel Wilber | — | (805) 226 9123 | Other | Paso Robles · San Luis Obispo County | — | — |
| Wild Bloom | Luke Thomas Huskey | — | (805) 400 4140 | Windows, patio, painters | Los Osos · San Luis Obispo County | — | — |
| Wildside Construction INC | Paul Demetrius Choucalas | sasha@wildsideconstruction.com | (805) 772 7222 | GC, remodel, ADU | Morro Bay · San Luis Obispo County | — | — |
| Wileman Plumbing | Wileman Plumbing | — | (805) 550 9152 | Other | Atascadero · San Luis Obispo County | — | — |
| Wilkins Flooring | Wilkins Flooring | — | (805) 458 5136 | Other | Grover Beach · San Luis Obispo County | — | — |
| Wilkinson Construction | Jerry Dean Wilkinson | — | (805) 610 6715 | GC, remodel, ADU | Paso Robles · San Luis Obispo County | — | — |
| William B Morris INC | William Boyd Morris | — | (805) 788 8057 | GC, remodel, ADU | Morro Bay · San Luis Obispo County | — | — |