| Wlandview Landscape | Wlandview Landscape | — | (805) 797 7253 | Windows, patio, painters | Oxnard · Ventura County | — | — |
| Wm E Brewer INC | William Empson Brewer | — | (805) 407 6912 | Other | Ventura · Ventura County | — | — |
| Woldman Construction Company INC | Mitchel Jon Woldman | — | (805) 551 5323 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Wolf Electric And Data INC | Ejmin Haghverdian | — | (818) 934 7093 | Electricians | Simi Valley · Ventura County | — | — |
| Wolfe Roofing Systems | Branden Ryan Wolfe | — | (805) 558 9472 | Other roofers | Newbury Park · Ventura County | — | — |
| Wood City Builders | Wood City Builders | — | (805) 405 4553 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| Wood Construction | James John Wood | — | (818) 821 9492 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Wood Wizard Enterprises INC | Daniel John Ortiz | — | (805) 647 9663 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Woodbutcher Wood Works | Woodbutcher Wood Works | — | (805) 340 1070 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Woodchuck Woodworks | Woodchuck Woodworks | — | (626) 340 3876 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| Woodland Construction INC | Christine Sepulveda | — | (818) 222 2530 | GC, remodel, ADU | Westlake Village · Ventura County | — | — |
| Woodzone Finish Carpentry INC | Erick Ruben Teodoro-Leyva | — | (818) 966 8653 | Other | Simi Valley · Ventura County | — | — |
| World Security Low Voltage | World Security Low Voltage | — | (818) 415 2353 | Alarm and generators | Ojai · Ventura County | — | — |
| Worldwide Properties INC | David Fok | — | (310) 801 8999 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Wormsbecher Construction Company | Randall Edmund Wormsbecher | — | (805) 657 3240 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Worthy Plumbing | Worthy Plumbing | — | (805) 758 0319 | Other | Oxnard · Ventura County | — | — |
| Wrap Development Group INC | Mor Azran Sade | — | (818) 738 8237 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Wright Ag Grading LLC | David Morgan Wright | — | (805) 794 7729 | Other | Fillmore · Ventura County | — | — |
| Wright Excavation INC | Scott Douglas Wright | scottdwright@verizon.net | (805) 271 5065 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| Wright On Time Electric | Justin Andrew Wright | — | (805) 290 6968 | Electricians | Ventura · Ventura County | — | — |
| Wright Sawing & Breaking INC DBA Wright Sawing & Breaking | Amarie Michele Wright | — | (805) 658 1815 | Other | Ventura · Ventura County | — | — |
| Wt Flartey Construction | William Thomas Ii Flartey | — | (805) 231 0300 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| Xcab | Jesse Ryan Caro | — | (805) 509 0103 | Other | Camarillo · Ventura County | — | — |
| Ximarron Tile & Stone | Luisa Susana Marron-Fernandez | — | (805) 366 2009 | Other | Oxnard · Ventura County | — | — |
| Xpress Hardsc'ape&landscape | Xpress Hardsc'ape&landscape | — | (805) 336 8890 | Windows, patio, painters | Oxnard · Ventura County | — | — |
| Xpress One Plumber | Xpress One Plumber | xpress1plumbers@gmail.com | (805) 722-4814 | Other | Simi Valley · Ventura County | — | — |
| Yantzer Brothers Heating And Air INC | Jason Eric Patison | — | (818) 865 2310 | HVAC | Westlake Village · Ventura County | — | — |
| Yates Electric | Ryan Douglas Yates | — | (805) 509 4746 | Electricians | Oak View · Ventura County | — | — |
| Yaz Michael Development | Yaz Michael Development | — | (805) 231 7886 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Yeager Pools | Yeager Pools | — | (888) 700 0116 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Yellowfin Epoxy Coatings & Paint | Yellowfin Epoxy Coatings & Paint | — | (805) 978 9700 | Windows, patio, painters | Oxnard · Ventura County | — | — |
| Yevgeniy Jager Meister | Yevgeniy Jager Meister | — | (805) 256 2029 | GC, remodel, ADU | Ojai · Ventura County | — | — |
| York Construction Company | Christopher Paul York | — | (805) 368 7739 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Young Electric | Jody John Young | — | (805) 907 5848 | Electricians | Thousand Oaks · Ventura County | — | — |
| Young Electrical Solutions | Jody John Young | jody@youngelectricalsolutions.com | (805) 907 5848 | Electricians | Thousand Oaks · Ventura County | — | — |
| Your Garage Door Guy | Your Garage Door Guy | info@indiantypefoundry.com | (805) 955 0340 | Other | Simi Valley · Ventura County | — | — |
| Your Glass Connection INC | Dan Patrick Driscoll | — | (805) 388 3050 | Windows, patio, painters | Camarillo · Ventura County | — | — |
| Your Local Electrician | Your Local Electrician | — | (978) 479-8723 | Electricians | Thousand Oaks · Ventura County | — | — |
| Ys Construction | Salvador-orea Yovanni | — | (661) 312 8323 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Z Quality Construction | Houshmand Scott Zolfaghari | — | (805) 813 1717 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |