| Morley Fredericks Property Management | Morley Fredericks Property Management | info@morleyfredericks.com | (415) 847-1224 | Property managers | San Rafael · Marin County | — | — |
| Morris Painting | Morris Painting | — | (415) 309 6720 | Windows, patio, painters | Novato · Marin County | — | — |
| Mosey Properties LLC | Frank Joseph Puliafico | — | (415) 883 9465 | GC, remodel, ADU | Novato · Marin County | — | — |
| Motherworks INC | Lynne Marie Steinsieck | — | (415) 302 0621 | Windows, patio, painters | Novato · Marin County | — | — |
| Mountain Bay Construction INC | Peter Iwate | — | (415) 385 9692 | GC, remodel, ADU | Novato · Marin County | — | — |
| Mps | Patrick Michael Meehan | — | (415) 847 4530 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Mr Arbor - Tree Care Arborists | Hector Maurio Chan Rosado | — | (415) 897 8073 | Tree | Novato · Marin County | — | — |
| Mr Sandman Hardwood Floors LLC | John Joseph Arata | — | (415) 482 8818 | Other | San Rafael · Marin County | — | — |
| Mr Skylight | Ladd Benjamin Bogdonoff | ladd@mrskylight.com | (415) 454 8600 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Msa Framing | Msa Framing | — | (415) 940 8902 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Mt Tam Construction | Roger Gibbs Huntress | — | (415) 730 0438 | GC, remodel, ADU | Mill Valley · Marin County | — | — |
| Mtm Landscaping | Mtm Landscaping | — | (415) 250 0849 | Windows, patio, painters | San Rafael · Marin County | — | — |
| Muldoon Construction INC | Cormac Brendan Muldoon | — | (415) 735 8512 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Mulhall Construction INC | Adrian Stephen Mulhall | contact@mulhallconstruction.com | (415) 618 9662 | GC, remodel, ADU | Novato · Marin County | — | — |
| Mulholland Works INC | Shawn James Mulholland | — | (415) 893 0444 | GC, remodel, ADU | Novato · Marin County | — | — |
| Mullen Plumbing | Mullen Plumbing | — | (415) 410 6037 | Other | Novato · Marin County | — | — |
| Murata Construction & Landscape Design | Clifford Cye Murata | — | (415) 845 3333 | GC, remodel, ADU | Novato · Marin County | — | — |
| Murphy Construction | Matthew Nicholas Murphy | interested@domainmarket.com | (415) 306 9627 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Murphy Construction LLC | Christopher William Murphy | interested@domainmarket.com | (415) 328 3115 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Murren Plumbing INC | Matthew Patrick Murren | — | (415) 684 6728 | Other | Novato · Marin County | — | — |
| Mw General Contracting INC | Michael Joseph White | — | (415) 383 0667 | GC, remodel, ADU | Mill Valley · Marin County | — | — |
| Myers-ghilotti Bros Jv | Bros INC Ghilotti | — | (415) 454 7011 | Other | San Rafael · Marin County | — | — |
| Mystical Landscapes INC | Dane Easter Colby | dane@mysticallandscapes.com | (415) 455 9161 | Windows, patio, painters | San Rafael · Marin County | — | — |
| N M P Design | Nicholas Markos Perivolaris | info.nmpdesign@gmail.com | (415) 892 0199 | GC, remodel, ADU | Novato · Marin County | — | — |
| N1b | Alexander Hassan-Sada | — | (415) 602 2539 | GC, remodel, ADU | Greenbrae · Marin County | — | — |
| Nathan Vickers | Nathan Vickers | nathanavickers@gmail.com | (415) 297 0216 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Native Sheet Metal Roofing INC | Pedro Rives Garcia Tacam | — | (415) 419 5397 | Other roofers | San Rafael · Marin County | — | — |
| Natures Intention INC | Sean Casey Musgrove | — | (707) 771 5540 | Windows, patio, painters | Novato · Marin County | — | — |
| Nave Building & Development | Richard Peter Jr Nave | — | (415) 971 3431 | Electricians | Novato · Marin County | — | — |
| Nazar Property Management And Construction | Roland Joseph Nazar | — | (415) 385 7308 | GC, remodel, ADU | Novato · Marin County | — | — |
| Nefi Eduardo Medina | Nefi Eduardo Medina | — | (415) 233 2541 | GC, remodel, ADU | Novato · Marin County | — | — |
| Nele Frierson | Nele Frierson | — | (415) 272 6881 | Other | San Rafael · Marin County | — | — |
| Nelson Construction | Raymond Charles Nelson | — | (415) 258 9942 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Nelson Painting | Nelson Painting | — | (415) 368 2164 | Windows, patio, painters | San Rafael · Marin County | — | — |
| Nelson Richardson Construction INC | Nelson Edwin Richardson | — | (415) 254 6253 | GC, remodel, ADU | Novato · Marin County | — | — |
| Nelson's Painting | Nelson's Painting | jon@nelsonspainting.com | (415) 250 4100 | Windows, patio, painters | Sausalito · Marin County | — | — |
| Nemec Construction INC | Toby Ilja Nemec | — | (415) 302 2493 | GC, remodel, ADU | Bolinas · Marin County | — | — |
| Nerviani Paving INC | Kelly Robin Nerviani | — | (415) 454 2662 | Other | Novato · Marin County | — | — |
| Nerviani's Backflow Testing & Repair | Nerviani's Backflow Testing & Repair | — | (415) 246 2343 | Other | Novato · Marin County | — | — |
| Nery's Elite Carpentry | Nery's Elite Carpentry | — | (415) 845 2260 | GC, remodel, ADU | San Rafael · Marin County | — | — |