| Mpk Builders Construction & Design | Mpk Builders Construction & Design | — | (510) 206-4899 | GC, remodel, ADU | Alameda · Alameda County | — | — |
| Mpower Electric INC | Yama Omar | — | (925) 364 4684 | Electricians | Dublin · Alameda County | — | — |
| Mr Li Construction Co | Jing Zhi Li | — | (510) 828 9813 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| Mr Rooter Plumbing | Spencer Alan Ferguson | — | (510) 843 6378 | Other | Oakland · Alameda County | — | — |
| Mr Window | Mr Window | — | (707) 294 8507 | Windows, patio, painters | Fremont · Alameda County | — | — |
| Mrm Painting INC | Mario Roberto Medina | — | (415) 666 5439 | Windows, patio, painters | Oakland · Alameda County | — | — |
| Msl Construction And Management INC | Laishui Michael Lau | — | (408) 981 2878 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| Mt Zion Construction LLC DBA Mt Zion Glass | Joshua James Ferguson | — | (510) 921 2500 | Windows, patio, painters | Castro Valley · Alameda County | — | — |
| Mtc Pool Services | Mark Thomas Cole | — | (925) 413 7426 | Pool | Pleasanton · Alameda County | — | — |
| Mtc Xcavating LLC | Jose A Nieves Ledesma | — | (510) 372 5622 | Other | Hayward · Alameda County | — | — |
| Mtdb | Teiblum Matityahu | — | (510) 605 8150 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Mtp Construction And Painting | Meo Thanh Pham | — | (510) 449 9439 | GC, remodel, ADU | San Lorenzo · Alameda County | — | — |
| Mts Electric INC | Howard Youngho Jin | — | (925) 998 9150 | Electricians | Pleasanton · Alameda County | — | — |
| Much Less Electric | Oliver Domingo Doctor | — | (510) 200 4348 | Electricians | San Lorenzo · Alameda County | — | — |
| Mueller Excavating INC | Ann Leslie Mueller | r.mueller@muellerexcavating.com | (925) 449 5788 | Other | Livermore · Alameda County | — | — |
| Mueller Nicholls INC DBA Mn Builders | Richard Wilson Robb | — | (510) 444 5000 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Mugglestone Gardens | Mugglestone Gardens | — | (510) 325 4213 | Windows, patio, painters | Berkeley · Alameda County | — | — |
| Murcia's Plumbing | Murcia's Plumbing | — | (510) 760 3609 | Other | Hayward · Alameda County | — | — |
| Murex Sliding Doors INC | Leznik Evgeni | — | (818) 917 9107 | Other | Hayward · Alameda County | — | — |
| Murillo's Remodeling INC | Galvan Martin Murillo | — | (510) 386 8133 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Murray Construction Services INC | Stacey Jerome Murray | — | (510) 581 4960 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Musa Construction | Muhammad Yunus Rana | sadimusa1990@hotmail.com | (510) 648 5893 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Musial Heating & Air INC | Carmen Vincent Musial | — | (510) 579 3075 | HVAC | Newark · Alameda County | — | — |
| Mv Quality Construction | Vincent Sinh Hoang | — | (510) 371 3978 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| My Oakland Electrician | My Oakland Electrician | — | (510) 842-0144 | Electricians | Oakland · Alameda County | — | — |
| My Remodeling Group INC | Avi Suissa | — | (818) 212 9237 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| My Workshed | My Workshed | — | (415) 577 9050 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Myco Custom Painting | Myco Custom Painting | — | (510) 500 5135 | Windows, patio, painters | Berkeley · Alameda County | — | — |
| Mycom Communications INC | Douglas Allen Scherer | — | (510) 599 9955 | Other | Livermore · Alameda County | — | — |
| Myerhoff & Associates Inc. | Myerhoff & Associates Inc. | — | (415) 812-4450 | Property managers | Alameda · Alameda County | — | — |
| Mynd Property Management | Mynd Property Management | — | (510) 543-2534 | Property managers | Oakland · Alameda County | — | — |
| Mynor Electric INC | Rosales Mynor Muj | — | (510) 377 1821 | Electricians | Hayward · Alameda County | — | — |
| Mynor's Plumbing Services | Mynor Augusto Cruz | — | (415) 637 6875 | Other | Oakland · Alameda County | — | — |
| Mytrn Enterprises LLC | Ricardo Medina | — | (510) 789 5001 | GC, remodel, ADU | Newark · Alameda County | — | — |
| Mz Painting | Mz Painting | — | (510) 209 6095 | Windows, patio, painters | San Leandro · Alameda County | — | — |
| Mzs Construction Group | Guangren Shao | — | (650) 466 6666 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| N B A Systems | N B A Systems | — | (510) 773 3403 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| N B R Construction INC | Nicolas Bolanos Rodriguez | — | (510) 396 2837 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| N E Electric | Nathan Louis King | — | (408) 813 0577 | Electricians | Fremont · Alameda County | — | — |
| N E Perez Construction | Norman Edgardo Perez | — | (510) 626 7003 | GC, remodel, ADU | San Leandro · Alameda County | — | — |