| Majestic Builders | Luis Silva Perez | — | (510) 782 6942 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| Majestic Builders Homes INC | Luis Silva Perez | — | (510) 782 6942 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| Majesty Kitchen And Bath | Majesty Kitchen And Bath | — | (510) 881 6875 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Mak Const | Mak Const | — | (510) 301 8958 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| Mako Heating Cooling And Electrical | Artem Kriuchkov | — | (408) 766 2271 | HVAC | Hayward · Alameda County | — | — |
| Makovia Construction | Zhen Hang Ma | — | (510) 400 9884 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| Makushin Plumbing | Makushin Plumbing | — | (510) 612 9207 | Other | Oakland · Alameda County | — | — |
| Malagon Legacy Landscaping LLC | Chavez Jesus Malagon | — | (510) 648 8681 | Windows, patio, painters | Newark · Alameda County | — | — |
| Maldonado Home Construction | Cesar E Maldonado | — | (510) 586 2145 | GC, remodel, ADU | Alameda · Alameda County | — | — |
| Maldonado's Construction | Juan Manuel Maldonado | info@maldonadosconstruction.com | (510) 282 7023 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Mallard Plumbing | Jose Manuel Paredes | info@mallardplumbing.com | (510) 465 3449 | Other | Oakland · Alameda County | — | — |
| Malley Building | Malley Building | — | (510) 843 9958 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Man Sheng Li | Man Sheng Li | — | (510) 364 1281 | Electricians | Fremont · Alameda County | — | — |
| Manada Roofing INC | Perez Jesus | — | (510) 780 9517 | Other roofers | San Leandro · Alameda County | — | — |
| Manada Roofing New Era INC | Perez Jesus | — | (510) 780 9517 | Other roofers | San Leandro · Alameda County | — | — |
| Mancer Innovation Construction | Mancera Luis | — | (510) 335 5466 | Electricians | Fremont · Alameda County | — | — |
| Mannon Construction Incorporated | Eric Henry Mannon | — | (415) 509 1983 | Electricians | Oakland · Alameda County | — | — |
| Manny's Plumbing | Manny's Plumbing | — | (510) 414 7883 | Other | Oakland · Alameda County | — | — |
| Manor Window LLC | Mark William Mc Gill | mark@manorwindow.com | (510) 352 9215 | Windows, patio, painters | San Leandro · Alameda County | — | — |
| Manou Specialty Builders INC | Eric Sylvain Manou | — | (510) 928 3060 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Manuel A De Freitas | Manuel A De Freitas | — | (925) 640 7285 | Other | Livermore · Alameda County | — | — |
| Manuel Fernandez Construction | Fernandez Manuel | — | (510) 714 9329 | GC, remodel, ADU | Newark · Alameda County | — | — |
| Manuel Fernando Pereira | Manuel Fernando Pereira | — | (925) 872 7907 | Windows, patio, painters | Livermore · Alameda County | — | — |
| Manuel Mejia | Manuel Mejia | — | (510) 396 1224 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Manzanita Design Build | Benjamin Howard Obriecht | — | (410) 259 7817 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Maoxing Wan | Maoxing Wan | — | (626) 203 2109 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Map Plumbing INC | Yau Sun Au | — | (415) 760 0286 | Other | Oakland · Alameda County | — | — |
| Maple Bay Roofing INC | Long Gao | — | (415) 741 6807 | Other roofers | Hayward · Alameda County | — | — |
| Mar Con / Sb James Construction | Co Marcon | — | (916) 240 9529 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Mar Con Co | Marco Antonio Manriquez | — | (510) 639 1914 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Mar Electric Service LLC | Victor Abelardo Martinez | — | (510) 333 3294 | Electricians | Oakland · Alameda County | — | — |
| Marble 2000 | Marble 2000 | — | (510) 329 5207 | Other | Hayward · Alameda County | — | — |
| Marble European Style INC | Magdalena Hanna Gruca | — | (510) 614 8400 | Other | Hayward · Alameda County | — | — |
| Marc Demarco Electric | Marc Anthony De Marco | — | (510) 919 1686 | Electricians | Berkeley · Alameda County | — | — |
| Marc-lawrence INC | Marc Joseph Ferguson | — | (510) 659 1640 | Windows, patio, painters | Fremont · Alameda County | — | — |
| Marcellino Budiman Tjia | Marcellino Budiman Tjia | — | (510) 842 7889 | Electricians | Fremont · Alameda County | — | — |
| Marcelo Electric | Roland Pangan Marcelo | — | (510) 714 5137 | Electricians | Union City · Alameda County | — | — |
| Marchand Construction | Anthony Joseph Marchand | contact@marchandconstruction.fr | (925) 484 1059 | GC, remodel, ADU | Pleasanton · Alameda County | — | — |
| Marciel Excavating | Marciel Excavating | — | (925) 667 0399 | Other | Livermore · Alameda County | — | — |
| Marco Roofing Company | Michael Edward Creeden | — | (510) 656 6400 | Other roofers | Fremont · Alameda County | — | — |