| 24 Seven Construction LLC | Loic Stephan Humbert | — | (415) 497 1333 | GC, remodel, ADU | Novato · Marin County | — | — |
| 2K Builders LLC | Thomas Wayne Jordan | — | (541) 731 3856 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| 38 Degrees North Latitude Builders INC | Paul Flores Blickman | — | (415) 456 0937 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| A & V Services | Alexander Gregory Sharp | info@a-v-services.com | (415) 725 1222 | GC, remodel, ADU | Novato · Marin County | — | — |
| A A A Builders Corp | Mustafa Juma Abuhalawa | — | (415) 686 0300 | GC, remodel, ADU | Tiburon · Marin County | — | — |
| A B Supply INC | La Cruz Jaime De | — | (415) 251 9365 | GC, remodel, ADU | Novato · Marin County | — | — |
| A Car For You INC | Scott Gordon Brauninger | — | (415) 519 5180 | GC, remodel, ADU | Sausalito · Marin County | — | — |
| A G C I INC | Ruben Mario Arce | — | (415) 785 7977 | GC, remodel, ADU | Greenbrae · Marin County | — | — |
| A G Construction | Gonzalez Farias Alejandro | — | (415) 532 4511 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| A L Martin Construction INC | Alexander Leo Martin | — | (415) 867 4551 | GC, remodel, ADU | Inverness · Marin County | — | — |
| A Packard Corporation | Charles Davis Allen | apackard.cvsui@slmail.me | (415) 888 8202 | GC, remodel, ADU | Mill Valley · Marin County | — | — |
| A Tureck Construction INC | Alexander Samuel Tureck | — | (650) 289 8118 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| A2c Construction INC | Rizo David Melendez | — | (415) 306 1571 | GC, remodel, ADU | Novato · Marin County | — | — |
| Aaron Hirschfeld Construction LLC | Aaron Daniel Hirschfeld | — | (415) 559 8531 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Abacus Group Builders INC | Charles Brown Iii Voorhis | — | (415) 927 0667 | GC, remodel, ADU | Corte Madera · Marin County | — | — |
| Abans Construction | Cesar Ricardo Aban Caamal | — | (415) 261 0189 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Abbey Builders | Abbey Builders | enquiries@abbeybuilders.org.uk | (415) 472 2910 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Abraham General Construction INC | Gutierrez Ramirez Abraham | — | (707) 591 3370 | GC, remodel, ADU | Point Reyes Station · Marin County | — | — |
| Acevedo Heritage Builder | Acevedo Heritage Builder | — | (415) 342 5980 | GC, remodel, ADU | Novato · Marin County | — | — |
| Adam Posard | Adam Posard | — | (415) 456 9636 | GC, remodel, ADU | San Anselmo · 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 | — | — |
| 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 | — | — |
| Aidan Collins & Sons INC | Charles Aidan Collins | — | (415) 456 3316 | GC, remodel, ADU | San Rafael · 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 | — | — |
| 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 Phase Construction | Richard Joseph Jr Kruppa | — | (415) 454 7598 | GC, remodel, ADU | San Rafael · Marin County | — | — |