| Matlick Excavation | Matlick Excavation | — | (707) 964 6538 | Other | Fort Bragg · Mendocino County | — | — |
| Matson General Contracting Inc. | Matson General Contracting Inc. | contact@matcon.work | (707) 202-4333 | GC, remodel, ADU | Fort Bragg · Mendocino County | — | — |
| Matt Lemons Construction | Jonathan Matthew Lemons | — | (707) 895 3095 | GC, remodel, ADU | Philo · Mendocino County | — | — |
| Matt's Custom Tree Care | Matt's Custom Tree Care | — | (707) 462 6496 | Other | Ukiah · Mendocino County | — | — |
| Matt's Water System's And Plumbing | Matt's Water System's And Plumbing | — | (707) 409 4164 | Other | Fort Bragg · Mendocino County | — | — |
| Matthew O'halloran Painting INC | Matthew Peter O'halloran | — | (707) 813 7747 | Windows, patio, painters | Mendocino · Mendocino County | — | — |
| Matthew Sundstrom Construction | Matthew James Sundstrom | — | (707) 367 6193 | GC, remodel, ADU | Gualala · Mendocino County | — | — |
| Max Electric | Cody James Max | — | (707) 272 9800 | Electricians | Redwood Valley · Mendocino County | — | — |
| Mc Carty Developement | Mc Carty Developement | — | (707) 621 0240 | GC, remodel, ADU | Redwood Valley · Mendocino County | — | — |
| Mc Clure Electric | Patrick Dean Mc Clure | info@mcclureelectric.com | (707) 895 3637 | Electricians | Boonville · Mendocino County | — | — |
| Mc Tech Plumbing | Mc Tech Plumbing | — | (707) 494 5672 | Other | Willits · Mendocino County | — | — |
| Mcdonald Mechanical | Mcdonald Mechanical | — | (707) 921 8087 | HVAC | Ukiah · Mendocino County | — | — |
| Mcgill Plumbing | Mcgill Plumbing | — | (707) 489 2825 | Other | Point Arena · Mendocino County | — | — |
| Mckean Construction Company | Zenas Ocean Mckean-chappell | — | (707) 734 3627 | GC, remodel, ADU | Fort Bragg · Mendocino County | — | — |
| Mclovin Construction | Ray Jon Losee | — | (707) 354 4069 | GC, remodel, ADU | Laytonville · Mendocino County | — | — |
| Md Tree Management LLC | Michael Gilbert Quinliven | — | (707) 972 0675 | Other | Willits · Mendocino County | — | — |
| Mehls Electric INC | Darin Glenn Iversen | — | (707) 884 3682 | Electricians | Gualala · Mendocino County | — | — |
| Mellott Painting | Mellott Painting | — | (707) 734 3933 | Windows, patio, painters | Fort Bragg · Mendocino County | — | — |
| Mendo Electro | Mendo Electro | — | (707) 961 0132 | Electricians | Fort Bragg · Mendocino County | — | — |
| Mendo Flooring INC | Marco Antonio Jr Toledo | — | (707) 367 5436 | Other | Ukiah · Mendocino County | — | — |
| Mendo Lake Termite Control | Mendo Lake Termite Control | — | (707) 946-7549 | Pest, tile roofs | Fort Bragg · Mendocino County | — | — |
| Mendocino Air Duct Service | Mendocino Air Duct Service | — | (510) 210-0781 | HVAC | Ukiah · Mendocino County | — | — |
| Mendocino At Encinitas Ranch Hoa | Mendocino At Encinitas Ranch Hoa | — | (760) 978-9609 | Property managers | San Marcos · Mendocino County | — | — |
| Mendocino Coast Builder | Mendocino Coast Builder | — | (650) 771 0985 | GC, remodel, ADU | Mendocino · Mendocino County | — | — |
| Mendocino Coast Property Management | Mendocino Coast Property Management | — | (707) 964-7777 | Property managers | Fort Bragg · Mendocino County | — | — |
| Mendocino Coast Services | Terrence Darrel Babich | — | (707) 964 9699 | HVAC | Fort Bragg · Mendocino County | — | — |
| Mendocino Coast Water Works | Eli Britton Rolfe | — | (707) 937 5409 | Other | Mendocino · Mendocino County | — | — |
| Mendocino Construction Services INC | Joseph Charles Cooper | — | (707) 489 2378 | Other | Redwood Valley · Mendocino County | — | — |
| Mendocino Door & Solid Surface | Mendocino Door & Solid Surface | — | (707) 463-1732 | Windows, patio, painters | Ukiah · Mendocino County | — | — |
| Mendocino Farms | Mendocino Farms | — | (760) 274-1192 | Property managers | Encinitas · Mendocino County | — | — |
| Mendocino Gutters | Mendocino Gutters | — | (707) 467 7662 | Other roofers | Ukiah · Mendocino County | — | — |
| Mendocino Hardware | Mendocino Hardware | — | (707) 937-0375 | Electricians | Mendocino · Mendocino County | — | — |
| Mendocino Jewelry Studio | Mendocino Jewelry Studio | — | (707) 937-0181 | Windows, patio, painters | Mendocino · Mendocino County | — | — |
| Mendocino Metals INC | Danny Robert Piffero | mendometals@comcast.net | (707) 462 4277 | Other | Ukiah · Mendocino County | — | — |
| Mendocino Pool And Spa | Mendocino Pool And Spa | — | (707) 484 6405 | Pool | Ukiah · Mendocino County | — | — |
| Mendocino Roofing INC | Jason Richard Hartje | — | (707) 485 7102 | Other roofers | Redwood Valley · Mendocino County | — | — |
| Mendocino Safety | Mendocino Safety | — | (707) 937-3346 | Alarm and generators | Mendocino · Mendocino County | — | — |
| Mendocino Stone Creations | Joatham Benjamin Sharaf | — | (707) 357 7443 | Other | Albion · Mendocino County | — | — |
| Mendocino Striping | Mendocino Striping | — | (707) 489 5970 | Other | Redwood Valley · Mendocino County | — | — |
| Mendocino Water Works | Mendocino Water Works | — | (707) 937-0478 | Electricians | Mendocino · Mendocino County | — | — |