| Jakes Tree Service | Jake Christian Gorman | — | (209) 303 6442 | Other | Modesto · Stanislaus County | — | — |
| Jam Flooring INC | Erika Michelle Pimentel | — | (209) 322 5514 | Other | Modesto · Stanislaus County | — | — |
| James Fleming | James Fleming | — | (209) 482 0244 | Other | Riverbank · Stanislaus County | — | — |
| James Matthew Caringello | James Matthew Caringello | — | (408) 206 5822 | Other | Oakdale · Stanislaus County | — | — |
| James Mitchell - Contractor | James Mitchell - Contractor | — | (209) 632 8414 | GC, remodel, ADU | Turlock · Stanislaus County | — | — |
| James Peter Ferguson | James Peter Ferguson | — | (209) 563 6097 | GC, remodel, ADU | Turlock · Stanislaus County | — | — |
| Jamison Custom Builders INC | Leland Rex Jamison | — | (209) 602 8581 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Jason Allen Construction | Jason Edward Allen | — | (209) 988 7662 | GC, remodel, ADU | Waterford · Stanislaus County | — | — |
| Jason Davis Electric INC | Jason Scott Davis | jason@jasondaviselectric.com | (209) 322 2275 | Electricians | Oakdale · Stanislaus County | — | — |
| Jason Keathley Painting And Decorating | Jason Keathley Painting And Decorating | — | (209) 416 6164 | Windows, patio, painters | Modesto · Stanislaus County | — | — |
| Jason Michael Hurlburt | Jason Michael Hurlburt | — | (209) 595 4721 | GC, remodel, ADU | Oakdale · Stanislaus County | — | — |
| Jason Slater | Jason Slater | — | (209) 968 8342 | GC, remodel, ADU | Ceres · Stanislaus County | — | — |
| Jason Turner Construction | Jason Christopher Turner | — | (209) 595 8448 | GC, remodel, ADU | Knights Ferry · Stanislaus County | — | — |
| Jasso's Construction | Jose Jasso | — | (209) 678 0606 | GC, remodel, ADU | Newman · Stanislaus County | — | — |
| Jaswinder Singh Toor | Jaswinder Singh Toor | — | (209) 614 3921 | GC, remodel, ADU | Ceres · Stanislaus County | — | — |
| Jaureguy's Design & Construction INC | John Edward Jaureguy | — | (209) 634 2002 | GC, remodel, ADU | Turlock · Stanislaus County | — | — |
| Jazz Painting | Jazz Painting | — | (209) 456 6420 | Windows, patio, painters | Oakdale · Stanislaus County | — | — |
| Jb Demo & Dirt | Cody Dale Skiles | — | (209) 595 0870 | Other | Modesto · Stanislaus County | — | — |
| Jb Flooring | Jb Flooring | — | (209) 402 1178 | Other | Modesto · Stanislaus County | — | — |
| Jb3 Specialists | John Oscar Iii Brouse | info@jb3specialists.com | (209) 892 5998 | Other | Oakdale · Stanislaus County | — | — |
| Jbl Builders INC | Juan Carlos Ochoa Amezcua | — | (209) 634 4142 | GC, remodel, ADU | Turlock · Stanislaus County | — | — |
| Jc Construction & Remodeling INC | Joel Derrick Comfort | — | (209) 634 4224 | GC, remodel, ADU | Denair · Stanislaus County | — | — |
| Jc Painting | Jc Painting | — | (209) 502 0020 | Windows, patio, painters | Riverbank · Stanislaus County | — | — |
| Jca Tile Marble & Granite INC | Barragan Moises Garcia | — | (209) 422 7346 | Other | Salida · Stanislaus County | — | — |
| Jcf Electric INC | Jerry Chaka Ford | — | (209) 604 6459 | Electricians | Modesto · Stanislaus County | — | — |
| Jcr & Sons Electric INC | Carlos Isai Rodriguez Orozco | — | (209) 737 9961 | Electricians | Modesto · Stanislaus County | — | — |
| Jcs Framing INC | John Charles Souza | — | (925) 525 1450 | GC, remodel, ADU | Turlock · Stanislaus County | — | — |
| Jd Landscaping | Jd Landscaping | — | (209) 216 8966 | Windows, patio, painters | Patterson · Stanislaus County | — | — |
| Jd Manos Construction INC | John David Iii Manos | — | (408) 540 4344 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Jdl Pro Builders | Jdl Pro Builders | — | (209) 346 3231 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Jdm Electric INC | Danny Gabriel Mercado Claros | — | (209) 222 7566 | Electricians | Ceres · Stanislaus County | — | — |
| Jdw Enterprizes | Jdw Enterprizes | — | (209) 241 4018 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Jeffs Home Repairs And Remodeling | Jeffs Home Repairs And Remodeling | — | (925) 791 7245 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Jem Construction | Jesus Erik Ramirez Rodriguez | — | (209) 606 6733 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Jenson Construction INC DBA Jenson Construction | Kenneth Edwards Jenson | — | (209) 204 2157 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Jenson Construction INC DBA Jentech Builders | Kenneth Edwards Jenson | — | (209) 204 2157 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Jerry Hill Electric | Jerry Earl Hill | — | (209) 988 6921 | Electricians | Oakdale · Stanislaus County | — | — |
| Jerry L Shelton Jr | Jerry L Shelton Jr | — | (209) 589 5172 | Other | Modesto · Stanislaus County | — | — |
| Jerry's Welding | Jerry's Welding | — | (209) 345 2430 | Other | La Grange · Stanislaus County | — | — |
| Jesse Jacquez | Jesse Jacquez | — | (209) 961 9072 | HVAC | Modesto · Stanislaus County | — | — |