| Hall Construction | Nathanael Frank Hall | — | (209) 403 2353 | GC, remodel, ADU | Soulsbyville · Tuolumne County | — | — |
| Halliday Construction | Charles Alan Jr Halliday | jared@hallidayltd.com | (209) 770 9916 | GC, remodel, ADU | Jamestown · Tuolumne County | — | — |
| Happy Floors | Happy Floors | — | (209) 566 5052 | Other | Sonora · Tuolumne County | — | — |
| Hardy | Brenton Douglas Hardy | — | (209) 206 6498 | GC, remodel, ADU | Long Barn · Tuolumne County | — | — |
| Harris Ent | Harris Ent | — | (209) 532 5859 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Haycock Construction INC DBA Alternative Energy | Gabriel John Wilde | — | (209) 533 9276 | HVAC | Sonora · Tuolumne County | — | — |
| Hedgpeth Construction | Zane Thomas Hedgpeth | — | (209) 768 4613 | GC, remodel, ADU | Jamestown · Tuolumne County | — | — |
| Henricy Installations Of California | James Alexander Henricy | — | (559) 432 3633 | Other | Sonora · Tuolumne County | — | — |
| Hensel Construction | Joshua Allan Hensel | — | (707) 483 2321 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| High Sierra Hardwoods | High Sierra Hardwoods | highseirrahardwoods@gmail.com | (209) 588 2779 | Other | Standard · Tuolumne County | — | — |
| Highlander Painting | Highlander Painting | highlanderpaintingllc@gmail.com | (541) 633-9902 | Windows, patio, painters | Sonora · Tuolumne County | — | — |
| Hobbs Garage Doors | Hobbs Garage Doors | — | (209) 602 0276 | Other | Groveland · Tuolumne County | — | — |
| Hourglass Construction | Darrin Jay Evans | — | (209) 928 3090 | GC, remodel, ADU | Tuolumne · Tuolumne County | — | — |
| Howard Rodgers Construction | Howard Eugene Rodgers | — | (209) 743 4226 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Hughes Prospective Electrical Company LLC | James Michael Jr Hughes | — | (707) 334 3817 | Electricians | Columbia · Tuolumne County | — | — |
| Hull's Nor Cal Window & Door | Hull's Nor Cal Window & Door | — | (530) 345-5266 | Windows, patio, painters | Chico · Tuolumne County | — | — |
| Hurley's Contracting | Justin Jude Hurley | — | (209) 768 1002 | Windows, patio, painters | Twain Harte · Tuolumne County | — | — |
| I B Tile LLC | Isaac Thomas Budesilich | — | (925) 331 7378 | Other | Sonora · Tuolumne County | — | — |
| Ignite Gas Appliance Solutions | Ignite Gas Appliance Solutions | — | (209) 559 1657 | Other | Soulsbyville · Tuolumne County | — | — |
| Industrial Steel Construction INC | Benjamin Gabriel Neves | — | (209) 559 2206 | Other | Sonora · Tuolumne County | — | — |
| Innervision Home Inspections | Innervision Home Inspections | — | (805) 561-8790 | Inspectors | Sonora · Tuolumne County | — | — |
| Instahl INC | John Richard Jr Latorre | — | (209) 743 8091 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Isaac Anderson | Isaac Anderson | — | (209) 559 1616 | Other | Sonora · Tuolumne County | — | — |
| Isaac Construction | Tony Ross Isaac | — | (209) 770 4005 | GC, remodel, ADU | Cold Springs · Tuolumne County | — | — |
| Iveson Construction | Terry Alan Iveson | — | (209) 352 6901 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| J B Builders | Jaime Eugene Blott | — | (209) 352 1495 | GC, remodel, ADU | Soulsbyville · Tuolumne County | — | — |
| J F C General Building Contractor | John Frances Fitzgerald | — | (650) 444 1844 | GC, remodel, ADU | Twain Harte · Tuolumne County | — | — |
| J F Conlin Building Company | Jack Nicholas Fox Conlin | — | (209) 559 6766 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| J G Wood Floors | J G Wood Floors | — | (650) 773 5959 | Other | Sonora · Tuolumne County | — | — |
| J Hart Plumbing INC | Jay W Jr Hart | info@jhartplumbing.com | (209) 533 1978 | HVAC | Sonora · Tuolumne County | — | — |
| J J C Construction | John James Carr | — | (209) 768 2748 | GC, remodel, ADU | Tuolumne · Tuolumne County | — | — |
| J M Boone And Sons | James Maxwell Boone | — | (209) 532 2506 | Other | Sonora · Tuolumne County | — | — |
| J Rivera's Landscaping | J Rivera's Landscaping | — | (650) 716 3060 | Windows, patio, painters | Sonora · Tuolumne County | — | — |
| J S Drywall INC | James Conrad Serva | — | (209) 743 3626 | Other | Sonora · Tuolumne County | — | — |
| Jack Proctor Heating & Air Conditioning | Jack Ray Proctor | — | (209) 678 8915 | HVAC | Big Oak Flat · Tuolumne County | — | — |
| Jack R Wilson Jr | Jack R Wilson Jr | — | (209) 968 8474 | GC, remodel, ADU | Jamestown · Tuolumne County | — | — |
| James L Brown Construction | James Lee Brown | — | (209) 768 0770 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| James L Hunt Stairs & Millwork | James Laurence Hunt | — | (209) 768 7172 | GC, remodel, ADU | Soulsbyville · Tuolumne County | — | — |
| James Patrick Weaver | James Patrick Weaver | — | (209) 928 9291 | GC, remodel, ADU | Tuolumne · Tuolumne County | — | — |
| James R Dambacher Construction | James Roy Dambacher | — | (209) 532 4097 | Other | Sonora · Tuolumne County | — | — |