| Alliance Custom Builders INC | Steven Michael Andre | — | (415) 328 3693 | GC, remodel, ADU | Novato · Marin County | — | — |
| Allied Heating & Air Conditioning Co INC | Christian Bryant Barger | — | (415) 870 5041 | HVAC | San Rafael · Marin County | — | — |
| Allow Me Handyman /construction | Eric Robert Steege | — | (415) 454 4011 | GC, remodel, ADU | Fairfax · Marin County | — | — |
| Allwood Construction Services INC | James Bevan Robinson | — | (415) 286 2466 | GC, remodel, ADU | Kentfield · Marin County | — | — |
| Alm Home Renovation | Alm Home Renovation | — | (415) 320 2005 | GC, remodel, ADU | Novato · Marin County | — | — |
| Alpha Tree Service | Edgar Alonzo Cardenas Camacho | interested@domainmarket.com | (415) 827 8219 | Tree | Novato · Marin County | — | — |
| Alsterlind Construction Incorporated | Gregory Thomas Alsterlind | — | (415) 986 0316 | GC, remodel, ADU | Novato · Marin County | — | — |
| Alt Electric | Derek William Altman | — | (415) 250 5388 | Electricians | Fairfax · Marin County | — | — |
| Altius Home Services | Martinez-murillo Salvador | — | (415) 847 5304 | Electricians | Mill Valley · Marin County | — | — |
| Alvarado's Painting LLC | Alvarado Vazquez Omar | — | (415) 760 5156 | Windows, patio, painters | San Rafael · Marin County | — | — |
| Alvarez Marble & Tile | Alvarez Marble & Tile | — | (415) 408 8957 | Other | San Rafael · Marin County | — | — |
| American Construction And Supply INC | Stephen Charles Mc Kim | — | (415) 927 2024 | Electricians | Corte Madera · Marin County | — | — |
| American Reliance Security - Private Security Guard Company | American Reliance Security - Private Security Guard Company | — | (800) 823-6297 | Alarm and generators | Yorba Linda · Marin County | — | — |
| Amesos Plumbing INC | Sean Christopher Wiles | sean@amesosplumbing.com | (415) 457 6363 | Other | San Rafael · Marin County | — | — |
| Ammons Backflow Certified Testing INC | David Hoke Ammons | — | (415) 712 4863 | Other | San Rafael · Marin County | — | — |
| Amplex Electrical INC | Patrick Gerard Whooley | amplexelectrical26@gmail.com | (415) 559 6680 | Electricians | Novato · Marin County | — | — |
| Ams Construction Services | Mejia Siguenza Abinadi | impallari@gmail.com | (415) 302 7575 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Anatole Lesley | Anatole Lesley | — | (415) 377 7233 | Electricians | San Rafael · Marin County | — | — |
| Anchor Building Consulting | Anchor Building Consulting | — | (415) 250 4724 | GC, remodel, ADU | Tiburon · Marin County | — | — |
| Andes Project Contractor Corp | Obreque Leonardo Torres | — | (415) 342 4952 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Andrew Flick Artisan INC | Andrew Conrad Flick | — | (310) 890 0224 | GC, remodel, ADU | Lagunitas · Marin County | — | — |
| Andrew Gallagher Construction | Andrew Martin Gallagher | — | (415) 408 8351 | GC, remodel, ADU | Novato · Marin County | — | — |
| Andrew Mc Aghon Landscaping | Andrew Mc Aghon Landscaping | — | (415) 892 1315 | Windows, patio, painters | Novato · Marin County | — | — |
| Andrew Ong | Andrew Ong | — | (415) 301 8796 | Other | Novato · Marin County | — | — |
| Andrew Pino's Plumbing | Andrew Pino's Plumbing | — | (415) 578 8718 | Other | San Rafael · Marin County | — | — |
| Andy General Contracting | Andy Bernabe Deleon | — | (415) 596 9044 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Andy Schimmel Electrical Services | Andrew James Schimmel | — | (415) 717 9630 | Electricians | Novato · Marin County | — | — |
| Anello Painting And Construction | Anthony Joseph Anello | — | (415) 892 8989 | GC, remodel, ADU | Novato · Marin County | — | — |
| Angel Roofing Company | Sergio Antonio De La Cruz Gurrola | — | (415) 532 5213 | Other roofers | San Rafael · Marin County | — | — |
| Angelo Salarpi Construction | Angelo Francesco Salarpi | — | (415) 297 7324 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Anson Electric | Jeremy Stephen Anson | — | (510) 507 4675 | Electricians | Novato · Marin County | — | — |
| Antaeus Properties | Theodore Iii Horton | — | (415) 433 6420 | Electricians | Larkspur · Marin County | — | — |
| Anthony Cooney | Anthony Cooney | — | (415) 309 3940 | GC, remodel, ADU | Tiburon · Marin County | — | — |
| Anthony J Kenney Tile Co | Anthony Joseph Kenney | — | (415) 246 1077 | Other | Novato · Marin County | — | — |
| Anthony Love | Anthony Love | — | (415) 686 8139 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Anthony Martin Painting Company | Anthony Joseph Martin | marinpainter@aol.com | (415) 601 9184 | Windows, patio, painters | Mill Valley · Marin County | — | — |
| Anthony R Moore | Anthony R Moore | — | (415) 497 7311 | GC, remodel, ADU | Point Reyes Sta · Marin County | — | — |
| Anthony Ray Taubert | Anthony Ray Taubert | — | (415) 806 6872 | Electricians | San Rafael · Marin County | — | — |
| Antonio Caruso | Antonio Caruso | — | (415) 298 5515 | GC, remodel, ADU | Mill Valley · Marin County | — | — |
| Apex Builders LLC | Stefan James Sr Dalkert | — | (415) 215 5616 | GC, remodel, ADU | Novato · Marin County | — | — |