| Lundgren Systems General Engineering INC | Michael Arne Lundgren | — | (209) 743 4866 | Other | Sonora · Tuolumne County | — | — |
| Luther Engineering | Luther Engineering | — | (209) 743 0442 | GC, remodel, ADU | Columbia · Tuolumne County | — | — |
| M & M Home Improvements | M & M Home Improvements | — | (209) 531 9900 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| M A Electric | Micah Abram Simmons | — | (209) 588 3058 | Electricians | Twain Harte · Tuolumne County | — | — |
| M C Foye Construction | Matthew Christopher Foye | — | (209) 425 3693 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| M J 2 Landscape INC | John Abraham Semsen | — | (209) 743 6809 | Windows, patio, painters | Sonora · Tuolumne County | — | — |
| M.e.t Construction | Mark Edward Thompson | — | (209) 770 1194 | GC, remodel, ADU | Soulsbyville · Tuolumne County | — | — |
| Ma Ramet Construction | Mason Alan Ramet | — | (209) 728 7163 | GC, remodel, ADU | Twain Harte · Tuolumne County | — | — |
| Mack Denton Construction | Mack Harold Denton | — | (209) 768 5953 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Mad Viking Electric | Justin Wells Mildenberger | — | (209) 981 4113 | Electricians | Sonora · Tuolumne County | — | — |
| Maf Builders INC | Michael Anthony Flores | — | (209) 988 3356 | GC, remodel, ADU | Mi-wuk Village · Tuolumne County | — | — |
| Mammoth Windows And Doors | Mammoth Windows And Doors | contact@mammothwindowsanddoors.com | (760) 914-7200 | Windows, patio, painters | Mammoth Lakes · Tuolumne County | — | — |
| Manly Construction | Gregory Robert Manly | — | (209) 984 0468 | GC, remodel, ADU | Moccasin · Tuolumne County | — | — |
| Marc Mathis | Marc Mathis | — | (209) 743 2807 | Other | Sonora · Tuolumne County | — | — |
| Marcus Bieker Painting | Marcus Bieker Painting | — | (209) 753 8993 | Windows, patio, painters | Sonora · Tuolumne County | — | — |
| Mark Fox Painting | Mark Fox Painting | — | (209) 586 6413 | Windows, patio, painters | Long Barn · Tuolumne County | — | — |
| Mark Fray Construction | Mark Cameron Fray | — | (209) 743 1579 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Marvin Minor Real Estate Inspctr | Marvin Minor Real Estate Inspctr | — | (209) 928-9752 | Inspectors | Tuolumne · Tuolumne County | — | — |
| Massey Tile & Marble | Massey Tile & Marble | — | (209) 768 7763 | Other | Sonora · Tuolumne County | — | — |
| Mastercraft Painting | Mastercraft Painting | — | (831) 240 5012 | Windows, patio, painters | Mi Wuk Village · Tuolumne County | — | — |
| Matt Burgess Construction | Matthew Edward Burgess | — | (209) 768 0224 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Matt Burris Construction | Matthew Lee Burris | — | (209) 200 9711 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Matt Fray Construction | Matthew Charles Fray | — | (209) 743 3674 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Matt Seldon Construction | Matthew Dennis Seldon | mttseldon@gmail.com | (209) 753 8578 | GC, remodel, ADU | Jamestown · Tuolumne County | — | — |
| Matt Stone Electric INC | Matthew David Stone | — | (209) 606 9545 | Electricians | Sonora · Tuolumne County | — | — |
| Matthew Divine Construction | Matthew Patrick Divine | — | (209) 743 0421 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Max Painting | Max Painting | — | (760) 420 8385 | Windows, patio, painters | Jamestown · Tuolumne County | — | — |
| Max Potter Construction | Mark Stephen Potter | — | (209) 609 5243 | GC, remodel, ADU | Columbia · Tuolumne County | — | — |
| Michael James Landscaping | Michael James Landscaping | — | (209) 454 9676 | Windows, patio, painters | Sonora · Tuolumne County | — | — |
| Michael Lee Gilliam | Michael Lee Gilliam | — | (209) 586 2969 | GC, remodel, ADU | Twain Harte · Tuolumne County | — | — |
| Miguel A Cueto | Miguel A Cueto | — | (209) 409 2786 | GC, remodel, ADU | Jamestown · Tuolumne County | — | — |
| Mike Gray Construction | Michael William Gray | — | (209) 768 5320 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Mike Mc Connell Construction | Michael Robert Mc Connell | — | (209) 768 4914 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Mike Poole Construction | Michael Alan Poole | — | (209) 591 9422 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Millays Complete Construction | Stephen Kelly Millay | — | (209) 743 6107 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Miller Plumbing And Electric | David Roger Miller | — | (209) 586 5828 | Electricians | Twain Harte · Tuolumne County | — | — |
| Minners Tree Company INC | Arend Luis Minners | — | (209) 591 3747 | Tree | Sonora · Tuolumne County | — | — |
| Mng Construction | Michael Noel Gordon | — | (209) 770 2262 | GC, remodel, ADU | Groveland · Tuolumne County | — | — |
| Mobley Construction Company | Johnny Ray Jr Mobley | — | (707) 572 6045 | GC, remodel, ADU | Columbia · Tuolumne County | — | — |
| Modern Design Painting | Modern Design Painting | — | (209) 588-8662 | Windows, patio, painters | Sonora · Tuolumne County | — | — |