| Knott's Pest Control Inc. | Knott's Pest Control Inc. | — | (619) 466-0464 | Pest, tile roofs | La Mesa · Mono County | — | — |
| L Kings Construction | Luis Ramon Reyes | — | (760) 920 3577 | GC, remodel, ADU | Mammoth Lakes · Mono County | — | — |
| Laframboise Construction | Gerald James Laframboise | builder@laframboiseconstruction.com | (760) 709 1420 | GC, remodel, ADU | Mammoth Lakes · Mono County | — | — |
| Longboard Electric | Longboard Electric | — | (760) 533-0323 | Electricians | Carlsbad · Mono County | — | — |
| Mammoth Construction INC | Scott Anthony Woods | — | (760) 934 4444 | GC, remodel, ADU | Mammoth Lakes · Mono County | — | — |
| Mammoth Electrical | Shane Carter Galbraith | — | (760) 914 0311 | Electricians | Mammoth Lakes · Mono County | — | — |
| Mammoth Homes INC DBA Mammoth Lakes Plumbing Company | Brandon Daniel Toups | — | (760) 709 0730 | Other | Mammoth Lakes · Mono County | — | — |
| Mammoth Lakes Construction INC | Felix Heriberto Apodaca | jeff@mammothlakesconstruction.com | (310) 809 6725 | GC, remodel, ADU | Mammoth Lakes · Mono County | — | — |
| Mammoth Remodeling | Mammoth Remodeling | — | (760) 914 0044 | GC, remodel, ADU | Mammoth Lakes · Mono County | — | — |
| Mammoth Screens And Glass | Mammoth Screens And Glass | — | (760) 934 1600 | Windows, patio, painters | Mammoth Lakes · Mono County | — | — |
| Mammoth Sierra Electric | Kleinbard Martin | — | (760) 709 1830 | Electricians | Mammoth Lakes · Mono County | — | — |
| Mammoth Welding INC | Luke Aaron Connaughton | — | (760) 934 6495 | Other | Mammoth Lakes · Mono County | — | — |
| Mannetter Construction | David Jon Mannetter | — | (760) 914 1235 | GC, remodel, ADU | Mammoth Lakes · Mono County | — | — |
| Marchman Plumbing INC | Troy Gerhardt Marchman | — | (760) 567 2364 | Other | Bridgeport · Mono County | — | — |
| Mark M Construction | Mark William Maciaszek | — | (760) 914 2470 | GC, remodel, ADU | Mammoth Lakes · Mono County | — | — |
| Marty Federspiel | Marty Federspiel | — | (760) 920 1099 | Other | Mammoth Lakes · Mono County | — | — |
| Marzano & Sons General Engineering Contractors INC | Stephanie Ann Morgan | — | (760) 648 7455 | Other | June Lake · Mono County | — | — |
| Master Builder Construction Jmr | Jose Manuel Romero Baltazar | — | (760) 920 2121 | GC, remodel, ADU | June Lake · Mono County | — | — |
| Mc Cabe Construction | Lisa Michelle Hickson | — | (760) 937 2610 | GC, remodel, ADU | Mammoth Lakes · Mono County | — | — |
| Mc Mahon Construction | Robert Lee Mc Mahon | — | (209) 768 0596 | GC, remodel, ADU | Bridgeport · Mono County | — | — |
| Mcintosh Plumbing Service | Scott C Mcintosh | — | (760) 914 1491 | Other | Mammoth Lakes · Mono County | — | — |
| Mcw Construction INC | Marc Christopher Wolter | — | (760) 934 8614 | GC, remodel, ADU | Mammoth Lakes · Mono County | — | — |
| Michael Phillips Construction | Michael Albert Phillips | — | (760) 914 0241 | GC, remodel, ADU | Mammoth Lakes · Mono County | — | — |
| Miguel Solorio Enterprises INC DBA Sierra Paint And Drywall | Miguel| P Solorio | — | (760) 934 6273 | Windows, patio, painters | Mammoth Lakes · Mono County | — | — |
| Mike Elliott Painting | Mike Elliott Painting | — | (760) 914 1785 | Windows, patio, painters | Mammoth Lakes · Mono County | — | — |
| Mike Kenney Roofing INC | Michael John Kenney | — | (760) 934 9268 | Other roofers | Mammoth Lakes · Mono County | — | — |
| Mono Works | Mono Works | — | (760) 937 2944 | Windows, patio, painters | Lee Vining · Mono County | — | — |
| Mono Works | Mono Works | — | (760) 647 6418 | Windows, patio, painters | Lee Vining · Mono County | — | — |
| Mother Lode Property Management | Mother Lode Property Management | — | (209) 532-8147 | Property managers | Sonora · Mono County | — | — |
| Mountain Carpet Services INC | Michele Louise Glass | — | (760) 934 5823 | Other | Mammoth Lakes · Mono County | — | — |
| Mountain Dog Woodworks | Mountain Dog Woodworks | mammothdog@gmail.com | (760) 709 1515 | GC, remodel, ADU | Mammoth Lakes · Mono County | — | — |
| Mountain View General Construction | Danny David Halim | — | (203) 525 0340 | GC, remodel, ADU | Mammoth Lakes · Mono County | — | — |
| Navia Electric INC | Ivan Alejandro Avalos | — | (760) 965 6385 | Electricians | Mammoth Lakes · Mono County | — | — |
| North Star Building Company INC | John David Silva | — | (760) 965 9368 | GC, remodel, ADU | Mammoth Lakes · Mono County | — | — |
| Oaktree Window Coverings | Oaktree Window Coverings | oaktreemammothlakes@gmail.com | (760) 934 3858 | Other | Mammoth Lakes · Mono County | — | — |
| Ose Custom Construction | Dustin Thomas Ose | — | (760) 914 2729 | GC, remodel, ADU | Mammoth Lakes · Mono County | — | — |
| Owens Valley Builder | Owens Valley Builder | — | (760) 914 2021 | GC, remodel, ADU | Mammoth Lakes · Mono County | — | — |
| P W Like Construction Co | Philip William Like | — | (760) 485 6929 | GC, remodel, ADU | Benton · Mono County | — | — |
| Papco INC DBA Mountain Living | Dawn Louise Vereuck | — | (760) 937 1250 | GC, remodel, ADU | Mammoth Lakes · Mono County | — | — |
| Patrick Painting One A Week | Patrick Painting One A Week | patrickpainting@cs.com | (760) 937 3440 | Windows, patio, painters | Mammoth Lakes · Mono County | — | — |