| Willard A Hobbs | Willard A Hobbs | — | (831) 332 8517 | GC, remodel, ADU | Scotts Valley · Santa Cruz County | — | — |
| William Edward Morse | William Edward Morse | — | (831) 239 6966 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| William H Boyd Construction | William Harlan Boyd | — | (831) 419 8665 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| William H Gorman Iii | William H Gorman Iii | — | (831) 429 9334 | GC, remodel, ADU | Davenport · Santa Cruz County | — | — |
| William Joseph Mulcaire | William Joseph Mulcaire | — | (831) 515 9348 | GC, remodel, ADU | Aptos · Santa Cruz County | — | — |
| William Young Masonry INC | Stephen Remesechau Young | info@williamyoungmasonry.com | (831) 359 3010 | Other | Ben Lomond · Santa Cruz County | — | — |
| Willis Bailey Construction | Willis Arthur Iii Bailey | — | (831) 588 8729 | GC, remodel, ADU | Watsonville · Santa Cruz County | — | — |
| Wilson Electric | Nicholas Bryan Wilson | contact@wilsonelectric.works | (669) 300 1333 | Electricians | Boulder Creek · Santa Cruz County | — | — |
| Windt Audio Video Solutions | Gregory Thomas Windt | — | (831) 423 6027 | Other | Santa Cruz · Santa Cruz County | — | — |
| Wingfield's | Kent Alan Wingfield | — | (831) 247 5169 | Windows, patio, painters | Soquel · Santa Cruz County | — | — |
| Winterburn Construction INC | John Timothy Winterburn | — | (831) 247 2244 | GC, remodel, ADU | Soquel · Santa Cruz County | — | — |
| Wisemen Construction & Remodeling INC | Ernest James Navarro | — | (831) 970 0120 | GC, remodel, ADU | Capitola · Santa Cruz County | — | — |
| Witzig Painting | Witzig Painting | — | (831) 566 6157 | Windows, patio, painters | Scotts Valley · Santa Cruz County | — | — |
| Wolcott Michael Construction | Michael John Wolcott | — | (831) 334 5289 | GC, remodel, ADU | Freedom · Santa Cruz County | — | — |
| Wolf Painting | Wolf Painting | — | (831) 353 1059 | Windows, patio, painters | Watsonville · Santa Cruz County | — | — |
| Woodmaster | Jonathan Peter Leys | — | (831) 588 2212 | Other | Capitola · Santa Cruz County | — | — |
| Woods Painting | Woods Painting | — | (831) 462 3328 | Windows, patio, painters | Scotts Valley · Santa Cruz County | — | — |
| Woods Works Fire Protection INC | Richard Eugene Woods | — | (510) 566 6082 | Other | Scotts Valley · Santa Cruz County | — | — |
| Woodstove & Sun INC | Thomas Neal Karow | — | (831) 425 5123 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| Woodsy Construction | Brian Michael Woods | — | (310) 272 6824 | GC, remodel, ADU | Felton · Santa Cruz County | — | — |
| Woolley Worldwide INC | Holland James Woolley | — | (831) 457 8666 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| Workbench | Timothy James Gordin | — | (831) 227 2217 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| World Class Flooring | World Class Flooring | — | (831) 247 8750 | Other | Santa Cruz · Santa Cruz County | — | — |
| Worthy Buildings INC | Aaron Matthew Worthy | — | (831) 713 7389 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| Wright Construction | Michel Barry Wright | — | (831) 588 2437 | GC, remodel, ADU | Corralitos · Santa Cruz County | — | — |
| Wynn Electric | Benjamin Tyler Wynn | — | (831) 431 6900 | Electricians | Santa Cruz · Santa Cruz County | — | — |
| Xceptional Plumbing | Xceptional Plumbing | — | (831) 786 6052 | Other | Watsonville · Santa Cruz County | — | — |
| Yager Electric INC | Shane Ryan Yager | — | (831) 419 0447 | Electricians | Capitola · Santa Cruz County | — | — |
| Yates Woodworking INC | Scott Jason Yates | — | (831) 454 6102 | Other | Felton · Santa Cruz County | — | — |
| Yeager Construction | Zachary Russell Yeager | — | (831) 426 1552 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| Young Construction | Paul Vance Young | — | (831) 588 1608 | GC, remodel, ADU | Felton · Santa Cruz County | — | — |
| Youngcore Builder | Youngcore Builder | — | (831) 818 0238 | GC, remodel, ADU | Soquel · Santa Cruz County | — | — |
| Zach Dick Construction | Zachariah Samuel Dick | — | (831) 359 5380 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| Zachary Harper | Zachary Harper | harper@zacharyharper.com | (530) 219 5059 | Other | Santa Cruz · Santa Cruz County | — | — |
| Zamudio's Painting | Zamudio's Painting | — | (831) 359 3665 | Windows, patio, painters | Watsonville · Santa Cruz County | — | — |
| Zap Electric | Richard Michael Thompson | — | (831) 612 1865 | Electricians | Soquel · Santa Cruz County | — | — |
| Zeise Builder | Zeise Builder | — | (831) 227 3971 | GC, remodel, ADU | Watsonville · Santa Cruz County | — | — |
| Zephyr Climate Solutions | Zephyr Climate Solutions | — | (831) 227 8186 | HVAC | Felton · Santa Cruz County | — | — |
| Zgreen | Zgreen | — | (831) 421-9193 | Restoration | Santa Cruz · Santa Cruz County | — | — |