| Jon Walsh Tile | Jon Walsh Tile | — | (805) 657 6153 | Other | Mariposa · Mariposa County | — | — |
| Joseph E Allen | Joseph E Allen | — | (209) 628 7595 | Other | Mariposa · Mariposa County | — | — |
| Joshua Hayes Painting | Joshua Hayes Painting | — | (209) 347 7550 | Windows, patio, painters | Mariposa · Mariposa County | — | — |
| Joshua's Pest Control | Joshua's Pest Control | — | (858) 943-3900 | Pest, tile roofs | Vista · Mariposa County | — | — |
| Ken's Handy Service | Ken's Handy Service | — | (530) 884-4425 | Electricians | Mariposa · Mariposa County | — | — |
| Kevin Long Construction INC | Kevin Alan Long | — | (831) 320 8241 | GC, remodel, ADU | Mariposa · Mariposa County | — | — |
| Kramer's Electric | Donald A Kramer | — | (209) 761 2055 | Electricians | Catheys Valley · Mariposa County | — | — |
| Kris Baltz Builders | Kris Baltz Builders | — | (209) 872 4585 | GC, remodel, ADU | Coulterville · Mariposa County | — | — |
| L G A Construction/lonnie Allen | Lonnie Gene Allen | — | (209) 966 7750 | GC, remodel, ADU | Mariposa · Mariposa County | — | — |
| Larry Castro's Tree Service | Lawrence Edward Castro | — | (209) 347 7621 | Tree | Mariposa · Mariposa County | — | — |
| Latta Construction | Gregory Shane Latta | lattaconstruction6767@gmail.com | (209) 620 6767 | GC, remodel, ADU | Coulterville · Mariposa County | — | — |
| Leucadia Electric Inc. | Leucadia Electric Inc. | — | (760) 229-2603 | Electricians | Carlsbad · Mariposa County | — | — |
| Lingley Enterprises | Erick Daniel Ramirez | — | (209) 840 2654 | GC, remodel, ADU | Coulterville · Mariposa County | — | — |
| Lynch Excavation | Lynch Excavation | — | (559) 760 6393 | Other | Mariposa · Mariposa County | — | — |
| M A Marini Construction | Michael Augusto Marini | — | (510) 612 1038 | GC, remodel, ADU | Mariposa · Mariposa County | — | — |
| M D Day Electric | Michael Dean Day | — | (209) 402 3051 | Electricians | Coulterville · Mariposa County | — | — |
| Mach 8 Biological Consulting INC | Alexander Paul Mach | — | (951) 640 8598 | GC, remodel, ADU | Yosemite National Park · Mariposa County | — | — |
| Made In Mariposa | Made In Mariposa | astigma@astigmatic.com | (209) 966-2213 | Windows, patio, painters | Mariposa · Mariposa County | — | — |
| Mariner Pool & Spa | Mariner Pool & Spa | — | (760) 749-2276 | Pool | Valley Center · Mariposa County | — | — |
| Mariposa | Mariposa | — | (760) 424-5001 | Property managers | Vista · Mariposa County | — | — |
| Mariposa Alarm And Video | Mariposa Alarm And Video | heath@mariposaalarm.com | (209) 564 6662 | Alarm and generators | Catheys Valley · Mariposa County | — | — |
| Mariposa County Building Department | Mariposa County Building Department | — | (209) 966-3934 | GC, remodel, ADU | Mariposa · Mariposa County | — | — |
| Mariposa County Pest Management | Mariposa County Pest Management | — | (209) 966-2075 | Pest, tile roofs | Mariposa · Mariposa County | — | — |
| Mariposa Heating & Cooling | Mariposa Heating & Cooling | — | (209) 966-2115 | HVAC | Mariposa · Mariposa County | — | — |
| Mariposa Mechanical Service | Peter Alva Kiser | — | (209) 742 4748 | HVAC | Mariposa · Mariposa County | — | — |
| Mariposa Property Management | Mariposa Property Management | home@mariposapropertymanagement.com | (510) 898-6234 | Property managers | Berkeley · Mariposa County | — | — |
| Mariposa Tank INC | Richard Dee Wages | — | (209) 966 3973 | Other | Mariposa · Mariposa County | — | — |
| Mark Long Tractor Work | Mark Long Tractor Work | — | (209) 770 5150 | Other | Mariposa · Mariposa County | — | — |
| Mark Stephen Wright | Mark Stephen Wright | — | (209) 770 3001 | Other | Mariposa · Mariposa County | — | — |
| Marland & Evon Construction INC | Marland Dow Jones | — | (626) 433 5802 | GC, remodel, ADU | Coulterville · Mariposa County | — | — |
| Max's Glass | Max's Glass | max.maxsglass@gmail.com | (209) 752 4283 | Windows, patio, painters | Mariposa · Mariposa County | — | — |
| Mccargars Rustic Renovations | Mccargars Rustic Renovations | — | (209) 347-8149 | GC, remodel, ADU | Mariposa · Mariposa County | — | — |
| Mcclure Construction | Joshua Michael Mcclure | — | (559) 760 9815 | GC, remodel, ADU | Mariposa · Mariposa County | — | — |
| Mccord General Construction | Cord Charli Mc | — | (209) 410 8916 | GC, remodel, ADU | Catheys Valley · Mariposa County | — | — |
| Mcgrady & Sons Heating And Cooling INC | Steven Joseph Jr Mc Grady | — | (209) 347 9229 | HVAC | Mariposa · Mariposa County | — | — |
| Mcgrath Arts LLC | Scott Joel Mc Grath | mcgratharts1@gmail.com | (209) 628 2928 | Other | Mariposa · Mariposa County | — | — |
| Michael Derleth | Michael Derleth | — | (310) 200 9439 | GC, remodel, ADU | Mariposa · Mariposa County | — | — |
| Miclake Enterprises INC | Milton Alfred Lake | — | (209) 768 6156 | Other | Coulterville · Mariposa County | — | — |
| Mike Allen Plumbing | Mike Allen Plumbing | — | (559) 760 6940 | Other | Mariposa · Mariposa County | — | — |
| Mobile Roofing Repair & Installation Servize | Mobile Roofing Repair & Installation Servize | — | (619) 309-1563 | Other roofers | Encinitas · Mariposa County | — | — |