| John Muro DBA Gilroy Heating And Air Conditioning | Gilroy Heating And Air Conditioning | — | (408) 842 6913 | HVAC | Gilroy · Santa Clara County | — | — |
| John Paul Nalence | John Paul Nalence | — | (805) 452 4873 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| John Phoung | John Phoung | — | (408) 409 9353 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| John Piper Company INC | John Piper Griffiths | — | (669) 888 4000 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| John Pol DBA Pivotal Builders | John Pol DBA Pivotal Builders | — | (650) 823 5883 | GC, remodel, ADU | Milpitas · Santa Clara County | — | — |
| John R Daniels | John R Daniels | — | (408) 309 1642 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| John Scalmanini DBA Anderson Window & Door Installation | Anderson Window & Door Installation | — | (408) 295 3200 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| John Seaman Plumbing | John Seaman Plumbing | — | (408) 656 9936 | Other | San Jose · Santa Clara County | — | — |
| John Truitt Installation | John Truitt Installation | — | (408) 406 4022 | Other | San Jose · Santa Clara County | — | — |
| John Vanni Painting | John Vanni Painting | — | (408) 655 6631 | Windows, patio, painters | Santa Clara · Santa Clara County | — | — |
| John Vincent Gilligan | John Vincent Gilligan | — | (408) 655 9929 | GC, remodel, ADU | Los Gatos · Santa Clara County | — | — |
| John's Lock & Key | John's Lock & Key | — | (408) 835 8783 | Other | Campbell · Santa Clara County | — | — |
| John's Painting | John's Painting | — | (408) 202 1717 | Windows, patio, painters | San Jose · Santa Clara County | — | — |
| Johnathan Truong | Johnathan Truong | — | (801) 800 8999 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Johnson's Tree Care INC | Kevin Adam Johnson | — | (650) 810 6989 | Tree | San Jose · Santa Clara County | — | — |
| Johst Floors | Johst Floors | — | (408) 469 6658 | Other | San Jose · Santa Clara County | — | — |
| Jolee Horne - Landscape Design | Jolee Horne - Landscape Design | — | (650) 485 2515 | Windows, patio, painters | Palo Alto · Santa Clara County | — | — |
| Joma Electric | Jose Noe Marcos | — | (650) 501 1468 | Electricians | East Palo Alto · Santa Clara County | — | — |
| Jon Anderson Builds INC | Jonathan Paul Anderson | — | (408) 300 1231 | GC, remodel, ADU | Los Gatos · Santa Clara County | — | — |
| Jon Joseph Mattson | Jon Joseph Mattson | — | (408) 310 8083 | Other | Morgan Hill · Santa Clara County | — | — |
| Jon R Crase Construction INC | Jon Robert Crase | — | (408) 370 1485 | GC, remodel, ADU | Campbell · Santa Clara County | — | — |
| Jon Robinette | Jon Robinette | — | (408) 887 4600 | Other | San Jose · Santa Clara County | — | — |
| Jonathan Mc Allister | Jonathan Mc Allister | — | (650) 366 4224 | GC, remodel, ADU | Palo Alto · Santa Clara County | — | — |
| Jones Custom Cabinets INC | Rick L Jones | jonescustomcabinets@gmail.com | (408) 568 1892 | Other | San Jose · Santa Clara County | — | — |
| Jones Custom Masonry | Jones Custom Masonry | — | (408) 688 7683 | Other | San Jose · Santa Clara County | — | — |
| Jonez Fine Woodworking | Jonez Fine Woodworking | — | (408) 858 5997 | Other | San Jose · Santa Clara County | — | — |
| Jong - Do Yoon | Jong - Do Yoon | — | (408) 515 2825 | Electricians | Cupertino · Santa Clara County | — | — |
| Jordan Electric | Denis John Jordan | info@jordanelectric.com | (415) 740 2854 | Electricians | Gilroy · Santa Clara County | — | — |
| Jordan Electric INC | Daniel Louis Jordan | info@jordanelectric.com | (408) 221 0769 | Electricians | San Jose · Santa Clara County | — | — |
| Jordan Heating & Air Conditioning INC | Jordan Lee Renteria | — | (650) 333 4726 | HVAC | Mountain View · Santa Clara County | — | — |
| Jorge Soto | Jorge Soto | — | (408) 595 6820 | Other | San Jose · Santa Clara County | — | — |
| Jorgik Electric INC | Martinez Alonso Jorge | contact@jorgikelectric.com | (408) 665 5547 | Electricians | Gilroy · Santa Clara County | — | — |
| Jose A Vega | Jose A Vega | — | (408) 316 9762 | Other | San Jose · Santa Clara County | — | — |
| Jose Antonio Alejo | Jose Antonio Alejo | — | (408) 203 1174 | Other | San Jose · Santa Clara County | — | — |
| Jose Castillo | Jose Castillo | jac@elcalamo.com | (408) 316 8683 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Jose Do Construction | Joseph Thinh Do | — | (408) 797 8428 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Jose L Castaneda | Jose L Castaneda | — | (408) 705 8824 | GC, remodel, ADU | Los Gatos · Santa Clara County | — | — |
| Jose Luis Tello Ramirez | Jose Luis Tello Ramirez | — | (650) 400 8178 | GC, remodel, ADU | Palo Alto · Santa Clara County | — | — |
| Jose Manuel Medeiros | Jose Manuel Medeiros | — | (408) 590 0276 | Windows, patio, painters | San Jose · Santa Clara County | — | — |
| Jose Marin Tree Service | Carlos Ivan Juarez Parra | servandotrujillo14@gmail.com | (408) 807 3523 | Other | San Jose · Santa Clara County | — | — |