| Oneto Tile Co | Kevin Philip Oneto | — | (831) 476 4454 | Other | Santa Cruz · Santa Cruz County | — | — |
| Onofre Painting | Onofre Painting | — | (831) 706 6890 | Windows, patio, painters | Watsonville · Santa Cruz County | — | — |
| Ontimio Builders | Ontimio Builders | — | (831) 254 1735 | GC, remodel, ADU | Watsonville · Santa Cruz County | — | — |
| Onyx Hardwood Floors LLC | Acosta Vaal Misael | — | (831) 498 7442 | Other | Santa Cruz · Santa Cruz County | — | — |
| Op Custom Finish Carpentry INC | Paramo Alberto Ortega | — | (831) 254 0387 | Other | Watsonville · Santa Cruz County | — | — |
| Orchard Keepers INC | Matthew Almeida Sutton | — | (831) 566 2947 | Windows, patio, painters | Santa Cruz · Santa Cruz County | — | — |
| Orchard Valley Painting | Orchard Valley Painting | — | (408) 472 2332 | Windows, patio, painters | Capitola · Santa Cruz County | — | — |
| Orchardscapes | Terence Edward Welch | — | (831) 479 8733 | Tree | Santa Cruz · Santa Cruz County | — | — |
| Ordel Floors | Ordel Floors | — | (831) 331 6783 | Other | Santa Cruz · Santa Cruz County | — | — |
| Orlando Construction INC | Mario Orlando | — | (408) 829 6081 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| Oropeza Roofing | Jesus Robles Oropeza | — | (831) 566 3441 | Other roofers | Watsonville · Santa Cruz County | — | — |
| Orozco Roofing | Zavala Jesus Orozco | — | (831) 345 1581 | Other roofers | Watsonville · Santa Cruz County | — | — |
| Ortiz Building Services LLC | Ortiz Huerta Mauricio | — | (831) 400 2940 | GC, remodel, ADU | Watsonville · Santa Cruz County | — | — |
| Ortiz Construction | Raoul Tavil-alejan Ortiz | interested@domainmarket.com | (831) 724 3013 | GC, remodel, ADU | Aptos · Santa Cruz County | — | — |
| Outside Enterprises INC | Randall Ray Newkirk | — | (831) 234 0200 | GC, remodel, ADU | Capitola · Santa Cruz County | — | — |
| Overton Engineering INC DBA Overton Construction INC | Kendrick Overton Allen | — | (831) 920 8889 | Other | Santa Cruz · Santa Cruz County | — | — |
| Owen Commons | Owen Commons | — | (831) 325 3992 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| Oxford Design Woodworking | Oxford Design Woodworking | — | (831) 818 7721 | Other | Santa Cruz · Santa Cruz County | — | — |
| P L Construction | Pedro Pillar Lopez | — | (408) 472 1697 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| P P D Multimedia INC | P P D Multimedia INC | — | (831) 479 9098 | Other | Santa Cruz · Santa Cruz County | — | — |
| P R Woodworks | P R Woodworks | — | (831) 212 3151 | Windows, patio, painters | Soquel · Santa Cruz County | — | — |
| P S R Electric | Sauce-ramirez Pedro | — | (831) 239 1281 | Electricians | Soquel · Santa Cruz County | — | — |
| Pac Plumbing INC | Ernest Bert Muhly | — | (831) 212 7543 | Other | Soquel · Santa Cruz County | — | — |
| Pacific Coast Construction | Derek Richard Fischer | info@pacificcoastconstruction.com | (831) 334 5204 | GC, remodel, ADU | Watsonville · Santa Cruz County | — | — |
| Pacific Coast Firescaping Land Maintenance | Pacific Coast Firescaping Land Maintenance | — | (831) 713 6414 | Windows, patio, painters | Davenport · Santa Cruz County | — | — |
| Pacific Compass INC DBA Costa Bella Builders | Jeffrey Martin Thranow | jeff@costabellabuilders.com | (831) 462 0580 | GC, remodel, ADU | Aptos · Santa Cruz County | — | — |
| Pacific Craftsman | Pacific Craftsman | — | (831) 227 6585 | GC, remodel, ADU | Scotts Valley · Santa Cruz County | — | — |
| Pacific Door | Pacific Door | info@pacificdoor.com | (604) 272-5611 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| Pacific Exterior | Eric Oliver Schnaible | info@pacificexterior.com | (831) 212 1341 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| Pacific Fence INC | Darrin Michael Petzer | — | (831) 684 0957 | Other | Santa Cruz · Santa Cruz County | — | — |
| Pacific Guild Electric | Ishan Umesh Mallery | — | (831) 212 5809 | Electricians | Watsonville · Santa Cruz County | — | — |
| Pacific Horizons Industries | Pacific Horizons Industries | — | (408) 921 3661 | Electricians | Santa Cruz · Santa Cruz County | — | — |
| Pacific Iron Performance Engineering INC | Andre Lee Gandrup | — | (831) 621 2242 | Other | Scotts Valley · Santa Cruz County | — | — |
| Pacific Pride Construction | Frederick Charles Vitola | — | (831) 234 6777 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| Pacific Roofing | Paul Earl Richard Artau | sales@pacificroofing.com | (831) 247 9121 | Other roofers | Santa Cruz · Santa Cruz County | — | — |
| Pacific Steel | Pacific Steel | — | (831) 428 6426 | Other | Scotts Valley · Santa Cruz County | — | — |
| Pacific Sun Property Management Inc. | Pacific Sun Property Management Inc. | — | (831) 471-2424 | Property managers | Santa Cruz · Santa Cruz County | — | — |
| Packer Construction | Brett David Packer | — | (650) 465 2863 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| Painting By Bianco | Painting By Bianco | — | (831) 588 3643 | Windows, patio, painters | Santa Cruz · Santa Cruz County | — | — |
| Pajaro Valley Electric INC | William Laurence Clough | — | (831) 724 4757 | Electricians | Watsonville · Santa Cruz County | — | — |