| M C R Contracting | Mauricio Charles Roncancio | info@mcrcontracting.com | (415) 250 0554 | Other | San Rafael · Marin County | — | — |
| M F M Construction | Marc Frederick Meyer | — | (707) 332 4423 | GC, remodel, ADU | Novato · Marin County | — | — |
| M G Sandoval Construction | Miguel Angel Sandoval Zavala | — | (415) 612 7323 | GC, remodel, ADU | Novato · Marin County | — | — |
| M H Builders | M H Builders | — | (415) 320 5685 | GC, remodel, ADU | Novato · Marin County | — | — |
| M J Hershey | M J Hershey | — | (707) 799 4011 | GC, remodel, ADU | Novato · Marin County | — | — |
| M J Landscaping | M J Landscaping | — | (415) 730 9714 | Windows, patio, painters | San Rafael · Marin County | — | — |
| M L Brodeur Co | Marc Leo Brodeur | — | (415) 215 7505 | GC, remodel, ADU | Novato · Marin County | — | — |
| M M I A INC DBA Keith Fontana Construction | Keith Richard Fontana | — | (415) 850 7557 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| M Ross Construction | Michael Lucius Ross | — | (415) 883 3332 | Electricians | Novato · Marin County | — | — |
| M.b. Hardwood Floor Consulting | M.b. Hardwood Floor Consulting | — | (415) 760 2615 | Other | Novato · Marin County | — | — |
| M1 Builder Pro | M1 Builder Pro | — | (415) 724 9745 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Macgyver Construction Incorporated | Jay O'neil | — | (415) 314 5546 | GC, remodel, ADU | Woodacre · Marin County | — | — |
| Maclaird And Sons Construction INC | David Rost Maclaird | — | (415) 816 3314 | GC, remodel, ADU | Corte Madera · Marin County | — | — |
| Macsan INC | Michel Angelo San Galli | — | (415) 713 0780 | GC, remodel, ADU | Corte Madera · Marin County | — | — |
| Made For A Museum INC | Marc Andrew Bauer | information@madeforamuseum.com | (415) 497 8405 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Madera Builders | Leon Gramajo Roberto I De | — | (415) 990 1474 | GC, remodel, ADU | Tiburon · Marin County | — | — |
| Maggiora And Ghilotti INC | Matthew Ransom Petray | — | (415) 459 8640 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Magner Construction And Repair INC | Justin Roy Magner | — | (415) 497 4426 | GC, remodel, ADU | Kentfield · Marin County | — | — |
| Magnolia Construction & Design INC | Luis Gerardo Ruano | — | (510) 289 9168 | GC, remodel, ADU | Fairfax · Marin County | — | — |
| Magnolia Development INC | Mike Otto Griffith | — | (510) 334 5181 | GC, remodel, ADU | Inverness · Marin County | — | — |
| Mahoney Construction Company | Nicholas Jordan Mahoney | — | (415) 846 3987 | GC, remodel, ADU | Novato · Marin County | — | — |
| Majestic Pool Construction | Majestic Pool Construction | obie@majestic-pools.com | (951) 574-3176 | Pool | Murrieta · Marin County | — | — |
| Make It Right Carpentry INC | Wilber David Barrios Alvarado | — | (415) 795 0156 | GC, remodel, ADU | Novato · Marin County | — | — |
| Maldonado Concrete | Maldonado Concrete | — | (415) 424 5167 | Other | San Rafael · Marin County | — | — |
| Maldonado Jessy Construction | Maldonado Tzul David | maldonadojessy18@gmail.com | (415) 377 8011 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Maldonado Painting | Maldonado Painting | maldonadochaypainting@yahoo.com | (415) 305 1530 | Windows, patio, painters | Novato · Marin County | — | — |
| Maloney Construction INC | Sean Timothy Maloney | mattmaloneyconstruction@gmail.com | (415) 895 5304 | GC, remodel, ADU | Novato · Marin County | — | — |
| Maloney Odin Jv | Construction INC Maloney | — | (916) 251 5500 | Other | Novato · Marin County | — | — |
| Maloney-odin A Joint Venture | Construction INC Maloney | — | (916) 251 5500 | Other | Novato · Marin County | — | — |
| Manelli Construction | Daniel Allen Manelli | — | (415) 948 9873 | GC, remodel, ADU | San Anselmo · Marin County | — | — |
| Mann Custom Home Construction | Mann Strider | — | (415) 609 1542 | GC, remodel, ADU | Point Reyes Station · Marin County | — | — |
| Manuel Fernandez Landscape | Manuel Fernandez Landscape | — | (415) 606 2272 | Windows, patio, painters | San Rafael · Marin County | — | — |
| Manuel Landscape Services | Jose Manuel Rodarte | — | (415) 342 2014 | Windows, patio, painters | Novato · Marin County | — | — |
| Manuel Vazquez Landscaping INC | Vazquez Carranza Manuel | — | (415) 342 8145 | Windows, patio, painters | Novato · Marin County | — | — |
| Marc Leclerc | Marc Leclerc | — | (415) 235 1635 | GC, remodel, ADU | Novato · Marin County | — | — |
| Marcelo's Carpets & Flooring | Marcelo's Carpets & Flooring | — | (415) 518 5684 | Other | Novato · Marin County | — | — |
| Marianne's Painting | Marianne's Painting | — | (415) 720 8259 | Windows, patio, painters | San Rafael · Marin County | — | — |
| Marin Builders Association | Marin Builders Association | — | (415) 462-1220 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Marin Color Service 94901 | Marin Color Service 94901 | — | (415) 453-4065 | Windows, patio, painters | San Rafael · Marin County | — | — |
| Marin Construction | Mohsini Farid | johnfraser52@gmail.com | (415) 741 7415 | GC, remodel, ADU | San Rafael · Marin County | — | — |