| John Hope Electric INC | John Miles Hope | — | (831) 458 0805 | Electricians | Capitola · Santa Cruz County | — | — |
| John Jud Construction | John Carl Jud | — | (831) 566 9698 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| John La Rue | John La Rue | — | (209) 948 2127 | Electricians | Aptos · Santa Cruz County | — | — |
| John M Colendich | John M Colendich | — | (831) 588 9193 | GC, remodel, ADU | Aptos · Santa Cruz County | — | — |
| John Mason Construction | John Jeffrey Mason | — | (831) 320 2261 | GC, remodel, ADU | Watsonville · Santa Cruz County | — | — |
| John Mc Cann Builders INC DBA Jmc & Associates | John Peter Mc Cann | — | (831) 227 8270 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| John Peck & Associates | John Cornelius Peck | — | (408) 489 1364 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| John Peter Smiley | John Peter Smiley | — | (831) 345 5191 | GC, remodel, ADU | Watsonville · Santa Cruz County | — | — |
| John Robinson | John Robinson | interested@domainmarket.com | (831) 338 2313 | GC, remodel, ADU | Boulder Creek · Santa Cruz County | — | — |
| John Spurr - Builder | John Spurr - Builder | — | (831) 334 2853 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| John Tex Anderson Enterprise | John Tex Anderson Enterprise | — | (831) 251 2828 | Other | Ben Lomond · Santa Cruz County | — | — |
| John Toshikian | John Toshikian | — | (831) 359 6321 | Electricians | Soquel · Santa Cruz County | — | — |
| John Ulick Fry | John Ulick Fry | — | (831) 728 5588 | GC, remodel, ADU | Watsonville · Santa Cruz County | — | — |
| John Z Contracting | Jonathan Eugene Zafran | — | (831) 818 0133 | GC, remodel, ADU | Aptos · Santa Cruz County | — | — |
| Johnny Hoover Construction | John Robert Jr Hoover | — | (831) 588 8630 | Electricians | Watsonville · Santa Cruz County | — | — |
| Johnson Construction | Bruce Wayne Johnson | — | (831) 685 2025 | GC, remodel, ADU | Aptos · Santa Cruz County | — | — |
| Johnson Paving INC | Scott Allen Johnson | — | (831) 475 2765 | Other | Santa Cruz · Santa Cruz County | — | — |
| Jon Badeaux Construction INC | Jon Charles Badeaux | — | (831) 818 7343 | GC, remodel, ADU | Aptos · Santa Cruz County | — | — |
| Jon Cochran | Jon Cochran | — | (831) 750 4405 | Electricians | Aptos · Santa Cruz County | — | — |
| Jon Kozakis | Jon Kozakis | — | (831) 247 3359 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| Jon P Sisk Development | Jon P Sisk Development | — | (831) 419 4149 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| Jonathan Lee Mendoza | Jonathan Lee Mendoza | — | (831) 531 7095 | Other | Santa Cruz · Santa Cruz County | — | — |
| Jonathan Ofa Builders | Jonathan Ofa Builders | — | (650) 921 7643 | GC, remodel, ADU | Scotts Valley · Santa Cruz County | — | — |
| Jordan Booth | Jordan Booth | — | (831) 325 3199 | Other | Boulder Creek · Santa Cruz County | — | — |
| Jorge Herrera | Jorge Herrera | mail@jorgeherrera.com | (408) 500 7825 | GC, remodel, ADU | Felton · Santa Cruz County | — | — |
| Joseph Allen Ingram | Joseph Allen Ingram | — | (408) 599 9927 | GC, remodel, ADU | Boulder Creek · Santa Cruz County | — | — |
| Joseph Dimarzio | Joseph Dimarzio | — | (831) 239 7709 | Other | Santa Cruz · Santa Cruz County | — | — |
| Joseph Evans Construction | Joseph Robert Evans | — | (831) 588 3246 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| Joseph Jacobs Builders | Joseph Jacobs Builders | — | (831) 331 0811 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| Joseph Louis Guido | Joseph Louis Guido | — | (831) 462 1711 | GC, remodel, ADU | Soquel · Santa Cruz County | — | — |
| Joseph M Clarke | Joseph M Clarke | — | (408) 506 4048 | Other | Scotts Valley · Santa Cruz County | — | — |
| Joseph Ochoa Moreno Iii | Joseph Ochoa Moreno Iii | — | (408) 497 8590 | GC, remodel, ADU | Soquel · Santa Cruz County | — | — |
| Josh Sladwick Engineering | Josh Sladwick Engineering | — | (831) 566 3324 | Other | Boulder Creek · Santa Cruz County | — | — |
| Joshua A Michaelian Remodel And Renovation | Joshua Andrew Michaelian | — | (408) 887 2862 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| Joshua Murray Freeman | Joshua Murray Freeman | — | (831) 345 6438 | Windows, patio, painters | Aptos · Santa Cruz County | — | — |
| Joshua Scott Construction | Joshua Hill Scott | — | (831) 295 2153 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| Joshua Stephen Wilkens | Joshua Stephen Wilkens | — | (408) 805 1495 | Electricians | Santa Cruz · Santa Cruz County | — | — |
| Jp Lath And Plastering | Jp Lath And Plastering | — | (831) 319 2058 | Other | Watsonville · Santa Cruz County | — | — |
| Jplumbing | Uziel Misraim Jimenez-rodriguez | brad@jplumbing.com | (831) 706 8836 | Other | Watsonville · Santa Cruz County | — | — |
| Jrg Olvera Construction | Jorge Felipe Olvera | — | (831) 840 2581 | GC, remodel, ADU | Watsonville · Santa Cruz County | — | — |