| Joe Souza Construction INC | Joseph Inacio Souza | — | (209) 541 9106 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Joe The Plumber | Joe The Plumber | — | (408) 509 3260 | Other | Modesto · Stanislaus County | — | — |
| Joe Torres Plumbing | Joe Torres Plumbing | — | (209) 667 1460 | Other | Turlock · Stanislaus County | — | — |
| Joe's Heating & Air | Joe's Heating & Air | — | (209) 531 7794 | HVAC | Modesto · Stanislaus County | — | — |
| Joe's Landscaping | Garcia Jose | — | (209) 862 2004 | GC, remodel, ADU | Newman · Stanislaus County | — | — |
| Joel's Tree Service | Perez Joel | — | (209) 485 2440 | Tree | Modesto · Stanislaus County | — | — |
| Joey Smith | Joey Smith | — | (209) 204 4433 | Other | Modesto · Stanislaus County | — | — |
| John A Vassar Shutter & Blinds Installations INC | John Allen Vassar | — | (800) 506 6610 | Other | Newman · Stanislaus County | — | — |
| John C Williams | John C Williams | — | (209) 574 1090 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| John Frampton Ceramic Tile | John Frampton Ceramic Tile | — | (209) 495 9136 | Other | Modesto · Stanislaus County | — | — |
| John Ian Patio Covers LLC | John Richard Valadez | johnianpatiocovers@gmail.com | (209) 652 5745 | Other | Turlock · Stanislaus County | — | — |
| John K Krediet General Contractor | John K Krediet General Contractor | — | (209) 527 4340 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| John Lopes Electric | Lopes John | — | (209) 541 8599 | Electricians | Turlock · Stanislaus County | — | — |
| John Marquez | John Marquez | — | (209) 846 1150 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| John N Continillo | John N Continillo | — | (209) 410 4584 | GC, remodel, ADU | Turlock · Stanislaus County | — | — |
| Johns Premium Painting INC | John Michael Montes | johnspremiumpainting@yahoo.com | (209) 765 9884 | Windows, patio, painters | Oakdale · Stanislaus County | — | — |
| Johnson Painting | Johnson Painting | — | (209) 402 2041 | Windows, patio, painters | Modesto · Stanislaus County | — | — |
| Johnson's Borders & Beyond | Johnson's Borders & Beyond | — | (209) 303 8872 | Windows, patio, painters | Modesto · Stanislaus County | — | — |
| Jon Paul Zagaris | Jon Paul Zagaris | — | (209) 548 4570 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Jon's Quality Roofing | Jon Albert Lybolt | — | (209) 524 2274 | Other roofers | Modesto · Stanislaus County | — | — |
| Jonathan Jackson Construction | Jonathan Craig Jackson | — | (209) 450 7072 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Jones Heat And Air INC | Steven David Jones | jonescomfortzone@yahoo.com | (209) 632 5675 | HVAC | Turlock · Stanislaus County | — | — |
| Jordan Custom Welding | Jordan Custom Welding | — | (209) 613 1588 | Other | Modesto · Stanislaus County | — | — |
| Jorge Campos | Jorge Campos | — | (209) 996 6320 | Other | Modesto · Stanislaus County | — | — |
| Jorge Rodriguez | Jorge Rodriguez | interested@domainmarket.com | (209) 918 8093 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Jose L Pulido Windows & Glass Doors | Jose Luis Pulido | — | (510) 589 9440 | Windows, patio, painters | Patterson · Stanislaus County | — | — |
| Jose Perez Jp Construction | Jose Arellano Perez | — | (209) 605 4169 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Jose Reyes Plumbing | Jose Reyes Plumbing | — | (415) 630 3219 | Other | Turlock · Stanislaus County | — | — |
| Josh Golding | Josh Golding | — | (209) 488 8612 | Other | Waterford · Stanislaus County | — | — |
| Joshua Hardin | Joshua Hardin | — | (209) 204 5610 | Other roofers | Riverbank · Stanislaus County | — | — |
| Jrg Rain Gutters & Sheet Metal Fabrication | Jorge Francisco Lujano Cortez | — | (650) 921 7728 | Other | Modesto · Stanislaus County | — | — |
| Jrj Marble And Granite Countertops INC | Lara Raul Ruvalcaba | — | (925) 583 5490 | Other | Ceres · Stanislaus County | — | — |
| Jrp Construction | Jose Ramon Portillo | — | (209) 829 2276 | GC, remodel, ADU | Newman · Stanislaus County | — | — |
| Jrs M I Electric | Juan Francisco Marquez Sanchez | — | (209) 338 4498 | Electricians | Ceres · Stanislaus County | — | — |
| Js Painting | Js Painting | — | (530) 782 2722 | Windows, patio, painters | Modesto · Stanislaus County | — | — |
| Jsj Specialties INC | Saul Alfredo Gonzalez | — | (209) 568 8306 | Other | Salida · Stanislaus County | — | — |
| Jst Construction | Jacob Stephen Thurmond | — | (209) 985 8920 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Jsw Electric LLC | Justin Scott Wells | — | (209) 595 8544 | Electricians | Oakdale · Stanislaus County | — | — |
| Jt & Sons Fencing INC | Saul Trujillo | — | (209) 214 0379 | Other | Turlock · Stanislaus County | — | — |
| Jt's Glass INC | Torres Juan Luiz | jtsglass@yahoo.com | (209) 204 3214 | Windows, patio, painters | Modesto · Stanislaus County | — | — |