| Water's Electric | Taylor Charles Waters | — | (805) 813 6227 | Electricians | Simi Valley · Ventura County | — | — |
| Waterfalls Etcetera | Waterfalls Etcetera | — | (805) 813 0220 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Waterline Pool Services INC | Joseph Cavasino | — | (805) 404 9410 | Pool | Moorpark · Ventura County | — | — |
| Watertight Waterproofing INC | Richard William Penprase | — | (805) 529 4105 | Other | Moorpark · Ventura County | — | — |
| Watkins Painting INC | Calev Rahmyan Watkins | — | (805) 503 2679 | Windows, patio, painters | Ventura · Ventura County | — | — |
| Watt Electrical | Luis Trujillo Perez | — | (619) 616 4270 | Electricians | Oxnard · Ventura County | — | — |
| Wayne Flittner | Wayne Flittner | — | (805) 443 8744 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| Wayne Nakamura Wrought Iron Incorporated | Wayne Toshiteru Nakamura | — | (805) 338 7348 | Other | Camarillo · Ventura County | — | — |
| Wbgc INC DBA Western Banks General Contractors | Thomas David Hilgenberg | — | (805) 512 6727 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| We Do Windows | We Do Windows | wwsp@hotmail.com | (805) 644 0545 | Other | Ventura · Ventura County | — | — |
| Web Concrete Engineering LLC | Christopher Patrick Wolf | — | (805) 638 3195 | Other | Moorpark · Ventura County | — | — |
| Webster Bros Concrete Construction INC | Jason Edward Webster | — | (805) 529 4900 | Other | Moorpark · Ventura County | — | — |
| Weinstallprefabequipment4u | Randolfo Gregorio Rodriguez | — | (213) 435 3655 | Other | Oxnard · Ventura County | — | — |
| Weiss Painting & Construction | Edgar Daniel Weiss | — | (805) 498 4830 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| Weldability | Coronado Eduardo | — | (805) 268 3140 | Other | Oxnard · Ventura County | — | — |
| Weldworx INC | Frank Marshall Litterini | — | (805) 279 8310 | GC, remodel, ADU | Somis · Ventura County | — | — |
| Well Design + Build INC | Fabian Adelbert Ortiz | — | (818) 497 5275 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Wellcraft Custom Cabinetry | Wellcraft Custom Cabinetry | dave@wellcraftcustomcabinetry.com | (805) 384 2725 | Other | Camarillo · Ventura County | — | — |
| Wellik Construction | Jonathan Paul Wellik | — | (805) 612 4291 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Wesely-thomas Enterprises INC | Terry Lee Hillsten | — | (805) 379 2365 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| Wesley Smith Painting Services | Wesley Orion Smith | — | (805) 618 8473 | Windows, patio, painters | Oak View · Ventura County | — | — |
| Wesley Theis | Wesley Theis | — | (805) 795 1634 | GC, remodel, ADU | Ojai · Ventura County | — | — |
| West Coast Air Conditioning | Gina Lynn Haase | — | (805) 485 1410 | HVAC | Oxnard · Ventura County | — | — |
| West Coast Bld & Design | West Coast Bld & Design | — | (818) 681 3034 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| West Coast Commercial Painting INC | Boukair Moe | — | (310) 801 1499 | Windows, patio, painters | Westlake Village · Ventura County | — | — |
| West Coast Construction & Development | Morteza Rikhtegarzadhe | — | (213) 756 4484 | GC, remodel, ADU | Westlake Village · Ventura County | — | — |
| West Coast Contracting INC | Christos Stamatis Skianis | — | (818) 904 0662 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| West Coast Demo | West Coast Demo | — | (805) 421 3523 | Other | Camarillo · Ventura County | — | — |
| West Coast Marble And Granite INC | Jespeerd Korkis | — | (805) 485 4900 | Other | Camarillo · Ventura County | — | — |
| West Coast Masonry Ventura Co | John Kinsey Gogulski | — | (805) 377 0486 | Other | Ventura · Ventura County | — | — |
| West Coast Painting | West Coast Painting | — | (805) 486 7628 | Windows, patio, painters | Oxnard · Ventura County | — | — |
| West Coast Power Solutions | Michael Champ Haase | — | (805) 485 4433 | Electricians | Oxnard · Ventura County | — | — |
| West Coast Remodels | Saul Meza | — | (805) 746 5041 | GC, remodel, ADU | Port Hueneme · Ventura County | — | — |
| West Coast Sash & Door INC | Steven Edward Plat | — | (805) 644 4902 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| West Coast Signs | West Coast Signs | info@westcoastsigns.com | (805) 861 9616 | Other | Ventura · Ventura County | — | — |
| West Coast Tree Service | Ryan Michael Kenton | — | (805) 218 4069 | Tree | Ojai · Ventura County | — | — |
| West County Flooring | West County Flooring | — | (805) 207 9111 | Other | Oxnard · Ventura County | — | — |
| West Mission Plastering INC | Luna Ignacio Everardo | — | (805) 331 9067 | Other | Oxnard · Ventura County | — | — |
| West Oaks Construction | Nicholas Vincent Simili | — | (805) 732 2604 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| West Oaks Construction INC | Nicholas Vincent Simili | — | (805) 795 9607 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |