| M K Tannheimer | M K Tannheimer | — | (760) 937 5352 | Electricians | Bishop · Inyo County | — | — |
| M L M Painting | M L M Painting | — | (760) 614 0452 | Windows, patio, painters | Lone Pine · Inyo County | — | — |
| Major League Pest | Major League Pest | — | (760) 737-6810 | Pest, tile roofs | Oceanside · Inyo County | — | — |
| Mammoth Concrete Pumping | Mammoth Concrete Pumping | — | (760) 914 0812 | Other | Bishop · Inyo County | — | — |
| Manor Stove Works | Manor Stove Works | — | (760) 873 3106 | Other | Bishop · Inyo County | — | — |
| Manuel Alvarez Construction INC | Juan Matias Cervantes-Rosales | manuelar784@gmail.com | (760) 784 1103 | GC, remodel, ADU | Lone Pine · Inyo County | — | — |
| Mark Gadea Construction | Mark Steven Gadea | — | (760) 920 9073 | GC, remodel, ADU | Bishop · Inyo County | — | — |
| Martin Martinez Concrete INC | Martinez Martin | — | (760) 973 0812 | Other | Bishop · Inyo County | — | — |
| Masala Construction | Paul Francisco Gonzalez | — | (760) 937 6463 | GC, remodel, ADU | Bishop · Inyo County | — | — |
| Mashburn Construction INC | Donald Whitebuffalo Mashburn | — | (775) 335 9381 | GC, remodel, ADU | Bishop · Inyo County | — | — |
| Mc Coy Construction And Design Management INC | David Robert Mc Coy | — | (760) 920 7274 | GC, remodel, ADU | Bishop · Inyo County | — | — |
| Mesa Properties | Mesa Properties | info@mesaproperties.net | (909) 360-2660 | Property managers | Upland · Inyo County | — | — |
| Metro Heating | Metro Heating | — | (760) 492-7944 | HVAC | Encinitas · Inyo County | — | — |
| Mike Lary Enterprise | Mike Lary Enterprise | — | (760) 872 6796 | Other | Bishop · Inyo County | — | — |
| Mike Lowden Construction | Michael Earl Lowden | — | (760) 937 2922 | GC, remodel, ADU | Big Pine · Inyo County | — | — |
| Mikey Kettinger Art Studio | Mikey Kettinger Art Studio | — | (760) 454-9572 | Windows, patio, painters | Encinitas · Inyo County | — | — |
| Mojave Desert Heating & Cooling INC | Wayne Cecil Croasdale | — | (760) 872 1510 | HVAC | Bishop · Inyo County | — | — |
| Montgomery Creek Enterprises LLC | David William Doonan | — | (760) 937 2157 | Other | Bishop · Inyo County | — | — |
| Mora Fencing LLC | Flores Gustavo Mora | — | (760) 937 3717 | Other | Bishop · Inyo County | — | — |
| Morales Rooter | Morales Rooter | — | (760) 937 0925 | Other | Bishop · Inyo County | — | — |
| Mountain Craft Construction INC | John Nicolas Rambo | — | (760) 648 3141 | GC, remodel, ADU | Bishop · Inyo County | — | — |
| My Guy Heating Air & Plumbing | My Guy Heating Air & Plumbing | — | (760) 859-6999 | HVAC | Escondido · Inyo County | — | — |
| Neo’s Air Conditioning & Heating | Neo’s Air Conditioning & Heating | — | (747) 744-7448 | HVAC | San Fernando · Inyo County | — | — |
| New Bridge Management | New Bridge Management | — | (209) 668-6700 | Property managers | Turlock · Inyo County | — | — |
| Nexantixorix NexantixorixroofingProtected | Nexantixorix Nexantixorixroofing | — | (606) 509-8057 | Tile roofers | Encinitas · Inyo County | — | — |
| No Butts Plumbin | No Butts Plumbin | — | (760) 920 0505 | Other | Bishop · Inyo County | — | — |
| North County Audio Video & Security | North County Audio Video & Security | 1nchav@gmail.com | (760) 330-8377 | Alarm and generators | Vista · Inyo County | — | — |
| O'neill Flooring Solutions | O'neill Flooring Solutions | — | (760) 914 2083 | Other | Bishop · Inyo County | — | — |
| Omnichill HVAC | Omnichill HVAC | — | (833) 652-7124 | HVAC | Vista · Inyo County | — | — |
| Onyx Pest Control | Onyx Pest Control | — | (949) 237-2638 | Pest, tile roofs | Santa Ana · Inyo County | — | — |
| Orkin | Orkin | — | (760) 691-7026 | Pest, tile roofs | Vista · Inyo County | — | — |
| Oscar's General Construction | Thomas Lee Doman | — | (760) 914 1194 | GC, remodel, ADU | Bishop · Inyo County | — | — |
| Owens Valley Concrete | Owens Valley Concrete | — | (760) 258 6619 | Other | Bishop · Inyo County | — | — |
| Owens Valley Pest | Owens Valley Pest | support@jaspen.com | (760) 427-2183 | Pest, tile roofs | Bishop · Inyo County | — | — |
| Owens Valley Tree Services | Owens Valley Tree Services | — | (760) 873-8720 | Tree | Bishop · Inyo County | — | — |
| Ozzcorp INC | William Calderon Jauregui | — | (760) 920 7076 | GC, remodel, ADU | Bishop · Inyo County | — | — |
| Pagenkopp Company | Darrin Scott Pagenkopp | — | (714) 280 6377 | GC, remodel, ADU | Big Pine · Inyo County | — | — |
| Patrize Properties INC | Patrize Properties INC | info@patrizeproperties.com | (760) 652-5114 | Property managers | Encinitas · Inyo County | — | — |
| Pestgon | Pestgon | — | (760) 826-2003 | Pest, tile roofs | Oceanside · Inyo County | — | — |
| Pinpoint Pest Control Co INC | Pinpoint Pest Control Co INC | — | (760) 966-1100 | Pest, tile roofs | Vista · Inyo County | — | — |