| A C Seal Coating INC | Michael Anthony Cognetti | — | (209) 532 8955 | Other | Sonora · Tuolumne County | — | — |
| A Rose Plumbing INC | Fremont Scott Rose | — | (209) 586 1002 | Other | Twain Harte · Tuolumne County | — | — |
| Accent Tile Company Corp | Karl Christian Keul | — | (209) 459 0260 | Other | Tuolumne · Tuolumne County | — | — |
| Alderson Fencing | Kit James Lasee | — | (209) 532 8283 | Other | Jamestown · Tuolumne County | — | — |
| Algerine West Construction INC | Montgomery Lowell West | — | (209) 984 1883 | Other | Jamestown · Tuolumne County | — | — |
| Alm Welding And Fabrication INC | Adam Lloyd May | — | (209) 559 5924 | Other | Tuolumne · Tuolumne County | — | — |
| Ambrosia's Chimney Sweep | Ambrosia's Chimney Sweep | — | (209) 532 4883 | Other | Twain Harte · Tuolumne County | — | — |
| At Your Service Plumbing | Francisco Javier Cervantes | clientcare@atyourserviceplumbing.com | (253) 460-0826 | Other | Sonora · Tuolumne County | — | — |
| B J Slaton Trucking | B J Slaton Trucking | — | (209) 928 3132 | Other | Tuolumne · Tuolumne County | — | — |
| Baldwin Construction | Jex Frank Iii Baldwin | — | (209) 770 3821 | Other | Sonora · Tuolumne County | — | — |
| Bar Ob Enterprises | Nolan Speer Brennan | — | (209) 661 6365 | Other | Sonora · Tuolumne County | — | — |
| Bearden Enterprises Incorporated | Michael David Bearden | — | (209) 532 1700 | Other | Jamestown · Tuolumne County | — | — |
| Berchtold Const | Berchtold Const | — | (209) 770 0232 | Other | Soulsbyville · Tuolumne County | — | — |
| Big Pine General Engineering Contracting INC | Joseph Wallace Porter | — | (209) 694 5397 | Other | Sonora · Tuolumne County | — | — |
| Bonnie Kolpack | Bonnie Kolpack | — | (209) 743 5025 | Other | Sonora · Tuolumne County | — | — |
| Bulldog Brushing | Scott Sterling Hammond | — | (209) 768 6181 | Other | Sonora · Tuolumne County | — | — |
| C S Welding & Fabrication INC | Colton Hayden Smith | — | (209) 770 6275 | Other | Tuolumne · Tuolumne County | — | — |
| Canepa And Sons INC | Roger Byron Canepa | — | (209) 532 1136 | Other | Sonora · Tuolumne County | — | — |
| Carl S Eslinger | Carl S Eslinger | — | (209) 743 8584 | Other | Jamestown · Tuolumne County | — | — |
| Chappell's Plumbing | Chappell's Plumbing | — | (209) 352 8060 | Other | Sonora · Tuolumne County | — | — |
| Clarence Davis Stucco | Clarence Davis Stucco | — | (510) 549 9911 | Other | Twain Harte · Tuolumne County | — | — |
| Clayton Rosasco | Clayton Rosasco | — | (209) 532 3571 | Other | Sonora · Tuolumne County | — | — |
| Cmr Plumbing & Drain | Christopher Martin Rangel | — | (209) 768 9151 | Other | Sonora · Tuolumne County | — | — |
| Columbia Concrete Pumping & Supply INC | Michael Donovan Skuce | — | (209) 532 1853 | Other | Columbia · Tuolumne County | — | — |
| County Overhead Door And Gate | County Overhead Door And Gate | — | (415) 240 3622 | Other | Sonora · Tuolumne County | — | — |
| Custom Connections Av INC | Gregory Dwane Holly | — | (831) 251 3200 | Other | Sonora · Tuolumne County | — | — |
| Custom Hardwood Floors | Custom Hardwood Floors | — | (209) 533 3432 | Other | Standard · Tuolumne County | — | — |
| Custom Sheet Metal Mfg | Brett Patrick Riley | — | (209) 226 5036 | Other | Twain Harte · Tuolumne County | — | — |
| Dave's Plumbing | Dave's Plumbing | — | (209) 984 3498 | Other | Jamestown · Tuolumne County | — | — |
| David Graham Ent | David Graham Ent | — | (209) 965 3249 | Other | Cold Springs · Tuolumne County | — | — |
| David N Wise | David N Wise | — | (209) 928 4331 | Other | Sonora · Tuolumne County | — | — |
| Dean Stone Construction LLC | Dean Alan Stone | — | (209) 352 9809 | Other | Soulsbyville · Tuolumne County | — | — |
| Doug Perry Excavating INC | Raymond Douglas Perry | — | (209) 768 0793 | Other | Columbia · Tuolumne County | — | — |
| Dunlap Plumbing INC | Daniel James Dunlap | — | (209) 928 3477 | Other | Tuolumne · Tuolumne County | — | — |
| E H Tile And Stone Countertops | Elliot Ray Hall | — | (209) 768 6680 | Other | Columbia · Tuolumne County | — | — |
| Easy Street Gravel Road Repair LLC | Martin Leonard Reynolds | — | (209) 206 6296 | Other | Twain Harte · Tuolumne County | — | — |
| El Dorado Septic Service INC | Shawn Alyn Darr | — | (209) 536 1925 | Other | Soulsbyville · Tuolumne County | — | — |
| Eric Mills Drywall | Eric Mills Drywall | amkryukov@gmail.com | (209) 770 4003 | Other | Groveland · Tuolumne County | — | — |
| Finish Line Floor Covering | Finish Line Floor Covering | — | (530) 489 8133 | Other | Tuolumne · Tuolumne County | — | — |
| Fox Fencing | Fox Fencing | — | (209) 536 9663 | Other | Soulsbyville · Tuolumne County | — | — |