| James Roberson Construction INC | James Allen Roberson | — | (209) 743 8039 | GC, remodel, ADU | Tuolumne · Tuolumne County | — | — |
| Jay C Wallace | Jay C Wallace | — | (209) 770 3724 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Jb Excavation INC | Joey Brocchini | — | (209) 769 8666 | Other | Tuolumne · Tuolumne County | — | — |
| Jbs Landscape | Jbs Landscape | — | (209) 536 1145 | Windows, patio, painters | Sonora · Tuolumne County | — | — |
| Jeff Holderman Construction | Jeffery Carroll Holderman | — | (209) 770 1132 | GC, remodel, ADU | Soulsbyville · Tuolumne County | — | — |
| Jepsen Painting LLC | Curtis Mitchell Jepsen | — | (209) 694 5795 | Windows, patio, painters | Jamestown · Tuolumne County | — | — |
| Jesse Jones Tile | Jesse Jones Tile | jessejonestile@aol.com | (209) 206 8845 | Other | Sonora · Tuolumne County | — | — |
| Jesse Mccandless Painting Company LLC | Jesse Thomas Mccandless | dillon@paintandprofits.com | (209) 677 9566 | Windows, patio, painters | Sonora · Tuolumne County | — | — |
| Jex Baldwin Construction | Jex Frank Jr Baldwin | — | (209) 768 8836 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Jh Construction Services | Joshua Donald Hutchison | — | (209) 703 0156 | GC, remodel, ADU | Tuolumne · Tuolumne County | — | — |
| Jim Brosnan Construction | James Thomas Brosnan | — | (209) 559 0843 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Jmk Roofing INC | Jordan Michael Kolb | — | (209) 768 9230 | Other roofers | Sonora · Tuolumne County | — | — |
| Joe Cover & Sons INC | Benjamin Allen Cover | — | (209) 928 4433 | Tree | Tuolumne · Tuolumne County | — | — |
| Joe Wheeler DBA Sierra Electric | Gary Joe Ii Wheeler | — | (209) 591 7555 | Electricians | Jamestown · Tuolumne County | — | — |
| Joel Flooring | Joel Flooring | — | (209) 614 5825 | Other | Sonora · Tuolumne County | — | — |
| Joel Hicks General Contractor | Joel Hicks General Contractor | — | (209) 743 5322 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Johanson Construction | Jason Mark Johanson | — | (209) 614 0581 | GC, remodel, ADU | Groveland · Tuolumne County | — | — |
| John Anthony Feriani | John Anthony Feriani | — | (209) 928 4658 | GC, remodel, ADU | Tuolumne · Tuolumne County | — | — |
| John C Griffin Construction | John Charles Griffin | — | (209) 743 2396 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| John Diehl | John Diehl | pix@johndiehl.com | (209) 532 5232 | Electricians | Sonora · Tuolumne County | — | — |
| John Latorre Construction | John Richard Jr Latorre | — | (209) 743 8091 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| John Semsen Landscaping Co INC | John Abraham Semsen | — | (209) 743 6809 | Windows, patio, painters | Sonora · Tuolumne County | — | — |
| Joseph Paul Lutz | Joseph Paul Lutz | — | (209) 743 4356 | GC, remodel, ADU | Tuolumne · Tuolumne County | — | — |
| Jr's Floor Covering | Jr's Floor Covering | — | (209) 768 8027 | Other | Columbia · Tuolumne County | — | — |
| Justin Vaca Construction | Justin Christopher Vaca | — | (209) 591 3952 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| K & D London Concrete INC | Kevin James London | — | (209) 588 9073 | Other | Sonora · Tuolumne County | — | — |
| K Borgnis Plumbing | K Borgnis Plumbing | — | (209) 770 2330 | Other | Sonora · Tuolumne County | — | — |
| K D F Painting | K D F Painting | — | (925) 852 7973 | Windows, patio, painters | Sonora · Tuolumne County | — | — |
| Kc Construction | Casey Carl Fender | — | (209) 728 5280 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Keller Custom Home Services | Timothy Michael Keller | — | (209) 768 1168 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Kelly Roofing INC | Ryan John Kelly | mail@kellyroofing.com | (209) 213 8626 | Other roofers | Columbia · Tuolumne County | — | — |
| Ken Keagy Excavating INC | Kenneth Warne Keagy | — | (209) 532 6205 | Other | Sonora · Tuolumne County | — | — |
| Ken's Asphalt | Ken's Asphalt | — | (209) 532 0800 | Other | Sonora · Tuolumne County | — | — |
| Kenneth Duncan | Kenneth Duncan | — | (209) 605 3137 | Windows, patio, painters | Sonora · Tuolumne County | — | — |
| Kenway Construction LLC | Kenneth Wayne Jr Hobbs | — | (209) 459 9452 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Kerr Roofing INC | Louise Mildred Warnack | — | (209) 532 1187 | Other roofers | Twain Harte · Tuolumne County | — | — |
| Kevin Calfee | Kevin Calfee | — | (209) 768 2315 | GC, remodel, ADU | Tuolumne · Tuolumne County | — | — |
| Kevin V Keegan | Kevin V Keegan | — | (949) 305 8561 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Kiger Painting | Kiger Painting | — | (209) 533-1533 | Windows, patio, painters | Sonora · Tuolumne County | — | — |
| Kim Persson Electric | Suzanne Marie Persson | info@kimperssonelectric.com | (209) 532 6483 | Electricians | Sonora · Tuolumne County | — | — |