| Above The Rest Fencing INC | Matthew Mc Ivor Olyphant | — | (415) 785 8396 | Other | San Rafael · Marin County | — | — |
| Abracadabra Plumbing Rooter | Abracadabra Plumbing Rooter | — | (415) 990 6178 | Other | San Rafael · Marin County | — | — |
| Abraham General Construction INC | Gutierrez Ramirez Abraham | — | (707) 591 3370 | GC, remodel, ADU | Point Reyes Station · Marin County | — | — |
| Abraxas Electric INC | Giordano Thomas | — | (415) 518 5089 | Electricians | Mill Valley · Marin County | — | — |
| Accessibility Design & Construction INC | Michael Steven Desin | — | (415) 389 1996 | Electricians | Larkspur · Marin County | — | — |
| Acco Electric | Nate Paul Accomazzo | — | (415) 971 2857 | Electricians | San Rafael · Marin County | — | — |
| Acevedo Heritage Builder | Acevedo Heritage Builder | — | (415) 342 5980 | GC, remodel, ADU | Novato · Marin County | — | — |
| Acosta Heating Air Conditioning & Sheet Metal | Ronald Edward Acosta | — | (415) 751 0732 | HVAC | San Rafael · Marin County | — | — |
| Adam Posard | Adam Posard | — | (415) 456 9636 | GC, remodel, ADU | San Anselmo · Marin County | — | — |
| Adonai Construction INC | Milton Urias Diaz Lopez | — | (415) 424 8513 | Electricians | Novato · Marin County | — | — |
| Advance Concrete INC | Shalmani Hadi Ziari | — | (415) 720 9871 | GC, remodel, ADU | Novato · Marin County | — | — |
| Advanced Renovation & Construction | Bryan Richard Pay | — | (415) 497 9730 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Aea Group LLC | Aliyar Davoodi | admin@aea-group.com | (415) 233 1059 | GC, remodel, ADU | Corte Madera · Marin County | — | — |
| Aerie Construction | Andrew Jay Walbert | — | (415) 902 7777 | GC, remodel, ADU | Mill Valley · Marin County | — | — |
| Aes Group INC | Kenneth Gerard Bonkowski | — | (415) 507 9373 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Affinity Painting And Decorating Company | Elias Rene Ordonez-morales | — | (415) 328 3302 | Windows, patio, painters | Fairfax · Marin County | — | — |
| Ag Construction | Grokhotov Andrei | — | (415) 846 6668 | GC, remodel, ADU | San Anselmo · Marin County | — | — |
| Agcl Construction INC | Jimmy Hernan Lopez Mendoza | — | (415) 226 8007 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Age West LLC | Matthew Alan Stanton | matt@agewest.com | (619) 995 1030 | GC, remodel, ADU | Mill Valley · Marin County | — | — |
| Agile Railing | John Peter Gazzola | info@agilerailing.com | (415) 827 8200 | Other | Mill Valley · Marin County | — | — |
| Aguilar Electric | Cesar Mauricio Aguilar Alvarez | — | (415) 250 3736 | Electricians | San Rafael · Marin County | — | — |
| Aidan Collins & Sons INC | Charles Aidan Collins | — | (415) 456 3316 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Air Flow Pro's | Jose Vega-Sandoval | — | (415) 400 5140 | HVAC | San Rafael · Marin County | — | — |
| Aj Paintmasters Plus INC | Luis Alexis Salazar | — | (415) 492 1920 | Windows, patio, painters | Novato · Marin County | — | — |
| Ajanel Construction | Pablo Estuardo Ajanel Gonzalez | — | (415) 902 7118 | GC, remodel, ADU | Greenbrae · Marin County | — | — |
| Alan Hynes Construction LLC | Alan Dominic Anth Hynes | — | (415) 256 1228 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Albert E Rushton | Albert E Rushton | — | (415) 559 3860 | GC, remodel, ADU | Novato · Marin County | — | — |
| Albert Kun | Albert Kun | — | (415) 299 9141 | GC, remodel, ADU | Mill Valley · Marin County | — | — |
| Albertoli Construction Corporation | J M | — | (415) 299 9396 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Alcatraz Painting And Decorating | Alcatraz Painting And Decorating | — | (415) 879 6299 | Windows, patio, painters | San Rafael · Marin County | — | — |
| Alec M Balmy | Alec M Balmy | — | (415) 328 6494 | GC, remodel, ADU | Novato · Marin County | — | — |
| Alex Rockas Construction | Alexander D Rockas | — | (415) 336 6000 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Alfa Construction LLC | Thomas William Ahern | — | (415) 798 8784 | GC, remodel, ADU | Larkspur · Marin County | — | — |
| Ali Samgiss | Ali Samgiss | — | (415) 302 0750 | GC, remodel, ADU | Mill Valley · Marin County | — | — |
| Alioto & Associates INC | Michael John Alioto | — | (415) 308 6453 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| All Custom Painting Co | Henry Jr Achatz | — | (209) 550-9115 | Windows, patio, painters | San Rafael · Marin County | — | — |
| All Exterior Painting And Wood Restoration | Benjamen Graham Ruggles | — | (415) 453 2187 | Windows, patio, painters | Fairfax · Marin County | — | — |
| All Marin Electric INC | Bychkov Alexey | wweeiihhuuaanngg@gmail.com | (415) 634 7878 | Electricians | Novato · Marin County | — | — |
| All Phase Construction | Richard Joseph Jr Kruppa | — | (415) 454 7598 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| All Stars Tree Service | Henry Gaudencio Escobar Tecun | info@allstarstreeservice.com | (415) 405 5363 | Tree | Novato · Marin County | — | — |