| A Celtic Craftsman Builders | A Celtic Craftsman Builders | — | (209) 459 2936 | GC, remodel, ADU | Tuolumne · Tuolumne County | — | — |
| A M Chase Construction | Andy Chase | — | (209) 352 6182 | GC, remodel, ADU | Jamestown · Tuolumne County | — | — |
| Aaron Richardson Construction | Aaron Thomas Richardson | aaronrichconst1@gmail.com | (209) 353 6078 | GC, remodel, ADU | Twain Harte · Tuolumne County | — | — |
| Adam Dominick Construction | Adam Matthew Dominick | — | (209) 743 4045 | GC, remodel, ADU | Soulsbyville · Tuolumne County | — | — |
| Adam Ehlers Construction | Adam Jacob Ehlers | — | (209) 663 0222 | GC, remodel, ADU | Columbia · Tuolumne County | — | — |
| Addis Construction Co | Tewolde Berhan Berhane | — | (209) 743 1205 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| All In One Development | All In One Development | — | (209) 532 1521 | GC, remodel, ADU | Jamestown · Tuolumne County | — | — |
| Allgood Builders | Allgood Builders | — | (209) 743 7805 | GC, remodel, ADU | Twain Harte · Tuolumne County | — | — |
| Alpine Construction | Carson Trevor Scheftner | — | (209) 770 5399 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Alternative Energy Designs INC DBA A E D Construction | Cooper Jack Kessel | — | (209) 532 1123 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| American Made Masonry | American Made Masonry | jim@americanmademasonry.com | (209) 770 3206 | GC, remodel, ADU | Columbia · Tuolumne County | — | — |
| Anders Construction | Evan Taylor Anders | — | (408) 843 7519 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Andreetta Ag Construction | Marvin James Andreetta | — | (209) 601 1801 | GC, remodel, ADU | Jamestown · Tuolumne County | — | — |
| Anthony A Armstrong | Anthony A Armstrong | — | (209) 768 7511 | GC, remodel, ADU | Groveland · Tuolumne County | — | — |
| Arellano Built General Contractor | Arellano Built General Contractor | — | (209) 586 2100 | GC, remodel, ADU | Jamestown · Tuolumne County | — | — |
| B E Construction | Erik Lee Witt | — | (209) 728 4442 | GC, remodel, ADU | Twain Harte · Tuolumne County | — | — |
| Balance Builder | Balance Builder | — | (347) 585 7947 | GC, remodel, ADU | Jamestown · Tuolumne County | — | — |
| Bartels Building | Bartels Building | — | (209) 588 6449 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Bay Area Homes INC | Steven David Guernsey | — | (510) 304 7959 | GC, remodel, ADU | Groveland · Tuolumne County | — | — |
| Bear's Path LLC | James Charles Ramsey | — | (209) 459 7490 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Benchmark Building Co INC | Jacob Liam Stovall | — | (209) 206 6863 | GC, remodel, ADU | Soulsbyville · Tuolumne County | — | — |
| Blott Quality Homes | Lynda Topping Blott | — | (209) 591 7249 | GC, remodel, ADU | Soulsbyville · Tuolumne County | — | — |
| Bob Ragan Construction | Robert Duane Ragan | — | (209) 613 4341 | GC, remodel, ADU | Columbia · Tuolumne County | — | — |
| Bob's Woodshed | Bob's Woodshed | — | (209) 768 6855 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Bottini Building Services | Michael Kenneth Bottini | — | (925) 963 3458 | GC, remodel, ADU | Twain Harte · Tuolumne County | — | — |
| Boyer Construction | Robert Eugene Boyer | — | (209) 586 5010 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Bradford W Lorenzen DBA Lorenzen Construction | Bradford W Lorenzen | — | (209) 409 4233 | GC, remodel, ADU | Columbia · Tuolumne County | — | — |
| Brenden Simunaci/simunaci Construction | Brenden Alexander Simunaci | — | (209) 532 8718 | GC, remodel, ADU | Columbia · Tuolumne County | — | — |
| Brown-n-sons Construction | Richard Bryan Brown | — | (209) 206 2400 | GC, remodel, ADU | Groveland · Tuolumne County | — | — |
| Buck's Construction INC | Opie Buck Lemmon | — | (209) 770 5455 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Bullfrog Construction | Jeremiah Lee Jones | — | (209) 996 7232 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Burns Lionel Clinton Jr | Burns Lionel Clinton Jr | — | (707) 931 8912 | GC, remodel, ADU | Chinese Camp · Tuolumne County | — | — |
| C E O Construction | Christopher Edward Oakes | — | (209) 588 8753 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Cal Gold Construction Corporation | Mark Twain Patterson | info@calgoldconstruction.com | (209) 533 3333 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Caldera Construction | Caldera Construction | — | (209) 533-2188 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| California Gold Development Corporation | Steven Bradford Campbell | — | (209) 533 3333 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| California Pacific Construction | Jeffrey Donald Davis | — | (209) 588 6572 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Calvin Building | Calvin Building | — | (209) 770 0027 | GC, remodel, ADU | Mi-wuk Village · Tuolumne County | — | — |
| Camelot Land Development Corporation DBA Quality First | Donald Clark Parscal | — | (209) 770 6310 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Capito Constructs INC | Joseph Richard Doug Capito | — | (435) 414 3020 | GC, remodel, ADU | Tuolumne · Tuolumne County | — | — |