| J L P Electric | James Lloyd Jr Parmenter | — | (831) 345 3320 | Electricians | Ben Lomond · Santa Cruz County | — | — |
| J M Construction | Joe Eugene Martines | info@jmconstruction.com | (805) 472-2400 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| J M Construction | John Larry Miller | info@jmconstruction.com | (805) 472-2400 | GC, remodel, ADU | Aptos · Santa Cruz County | — | — |
| J M L Construction | James Michael Lichau | brian@jmlconstruction.com | (573) 429-4962 | GC, remodel, ADU | Ben Lomond · Santa Cruz County | — | — |
| J M Landscape | J M Landscape | — | (831) 254 2516 | Windows, patio, painters | Freedom · Santa Cruz County | — | — |
| J M Pacific INC | Joseph Robert Mc Intosh | — | (831) 818 0673 | GC, remodel, ADU | Aptos · Santa Cruz County | — | — |
| J Mac General Building Contractor | J Mac General Building Contractor | — | (669) 405 9190 | GC, remodel, ADU | Aptos · Santa Cruz County | — | — |
| J P Electric | Joan Marie Peterson | — | (831) 535 9858 | Electricians | Aptos · Santa Cruz County | — | — |
| J P's All Air Mechanical Co | Jonathan Peter Yankish | — | (831) 246 1646 | HVAC | Felton · Santa Cruz County | — | — |
| J R Crawford Construction | John Robert Crawford | — | (831) 419 1035 | GC, remodel, ADU | Soquel · Santa Cruz County | — | — |
| J R Zar INC | Randy John Zar | — | (831) 685 1116 | Electricians | Aptos · Santa Cruz County | — | — |
| J V P Construction INC | Mario Valencia-Perez | — | (831) 706 8591 | GC, remodel, ADU | Watsonville · Santa Cruz County | — | — |
| J Valencia Plastering INC | Jose Herrera Valencia | — | (831) 728 5734 | Other | Watsonville · Santa Cruz County | — | — |
| J W Hoover General Builder INC | James Wesley Hoover | — | (831) 498 3201 | GC, remodel, ADU | Watsonville · Santa Cruz County | — | — |
| J&m Property Management | J&m Property Management | jmpropertyfirm@gmail.com | (831) 254-6394 | Property managers | Aptos · Santa Cruz County | — | — |
| J&o Heating & Air LLC | Bautista Jesus | — | (831) 801 2732 | HVAC | Watsonville · Santa Cruz County | — | — |
| J&p Construction | Nicholas Yale Johnson | — | (831) 419 1863 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| Jack L Kennon General Contracting | Jack Lawrence Kennon | — | (831) 227 6133 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| Jack W Kunz Construction | Jack Walter Kunz | — | (831) 338 9682 | GC, remodel, ADU | Boulder Creek · Santa Cruz County | — | — |
| Jackson Landscape | Jackson Landscape | — | (831) 477 0447 | Windows, patio, painters | Capitola · Santa Cruz County | — | — |
| Jackson Plumbing | Jackson Plumbing | — | (408) 821 1973 | Other | Aptos · Santa Cruz County | — | — |
| Jacob D Adams | Jacob D Adams | contact@jacobdadams.com | (831) 212 8988 | GC, remodel, ADU | Capitola · Santa Cruz County | — | — |
| Jacob Wheeler | Jacob Wheeler | — | (831) 707 6701 | Windows, patio, painters | Santa Cruz · Santa Cruz County | — | — |
| Jacquard Construction | Joshua James Jacquard | — | (831) 345 0040 | GC, remodel, ADU | Aptos · Santa Cruz County | — | — |
| Jade Vision Construction INC | Jared Heath Mc Ewen | amkryukov@gmail.com | (831) 428 2513 | GC, remodel, ADU | Felton · Santa Cruz County | — | — |
| Jake Blanchette Construction | Jacob Douglas Blanchette | — | (831) 566 2459 | GC, remodel, ADU | Aptos · Santa Cruz County | — | — |
| Jake Gooch Electric INC DBA Vision Electric | Jeremy James Patnesky Gooch | — | (831) 406 9051 | Electricians | Santa Cruz · Santa Cruz County | — | — |
| James A Beebe | James A Beebe | — | (831) 662 3746 | GC, remodel, ADU | Aptos · Santa Cruz County | — | — |
| James C O'brian Con | James C O'brian Con | — | (831) 234 0422 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| James Eckerman Construction | Eckerman James | — | (831) 252 0987 | GC, remodel, ADU | Scotts Valley · Santa Cruz County | — | — |
| James Harrill | James Harrill | — | (831) 818 0229 | GC, remodel, ADU | Aptos · Santa Cruz County | — | — |
| James Hartje Construction INC | James Henry Hartje | — | (831) 476 8306 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| James Hutchinson | James Hutchinson | — | (831) 724 8802 | Electricians | Corralitos · Santa Cruz County | — | — |
| James Mechem Construction INC | James Clyde Iii Mechem | — | (831) 722 7660 | GC, remodel, ADU | Watsonville · Santa Cruz County | — | — |
| James Miller Construction | James Arthur Miller | — | (831) 588 6704 | GC, remodel, ADU | Santa Cruz · Santa Cruz County | — | — |
| James P Allen & Associates | James Philip Allen | — | (831) 426 6603 | Tree | Santa Cruz · Santa Cruz County | — | — |
| James Reilly Contracting INC | James Jay Reilly | — | (831) 662 2975 | GC, remodel, ADU | Aptos · Santa Cruz County | — | — |
| James Rosenberg Locksmith & Security | James Rosenberg Locksmith & Security | — | (831) 295 3375 | Alarm and generators | Santa Cruz · Santa Cruz County | — | — |
| James Rupert Gardner Jr Construction | James Rupert Jr Gardner | — | (831) 345 2917 | GC, remodel, ADU | Boulder Creek · Santa Cruz County | — | — |
| James Suhrie | James Suhrie | — | (831) 251 3488 | Other | Santa Cruz · Santa Cruz County | — | — |