| Beale Builders And Construction INC | Kurt Erich Beale | — | (415) 314 5002 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Bear Construction | Robert David Lile | — | (415) 233 3717 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Bear Dog Construction INC | Daniel Aaron Schonberg | — | (415) 470 1817 | GC, remodel, ADU | San Anselmo · Marin County | — | — |
| Beautifully Built Construction | David Alan Hoffman | — | (415) 574 5928 | GC, remodel, ADU | Fairfax · Marin County | — | — |
| Beautyland Landscapes & Concrete | Beautyland Landscapes & Concrete | — | (415) 312 6024 | Windows, patio, painters | Greenbrae · Marin County | — | — |
| Beaver Tree Service INC | Eric Kenneth Wagner | — | (415) 559 8797 | Tree | Kentfield · Marin County | — | — |
| Beckmann Construction INC | Karl Josef Beckmann | — | (510) 541 2796 | GC, remodel, ADU | Novato · Marin County | — | — |
| Bella Cosa Construction | Robert Thomas Hansen | — | (415) 271 7146 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Belle Marko Interiors | Belle Marko Interiors | — | (415) 302 2802 | Windows, patio, painters | San Rafael · Marin County | — | — |
| Belmon Landscape INC | Isaac Beltran | — | (619) 706 4457 | Windows, patio, painters | San Rafael · Marin County | — | — |
| Ben Rogne Construction INC | Benny Gunnar Rogne | — | (415) 258 8125 | GC, remodel, ADU | San Anselmo · Marin County | — | — |
| Benga Construction | Joseph Jr Benga | contact@bengaconstruction.com | (415) 760 3193 | Electricians | Novato · Marin County | — | — |
| Benjamin Franklin Plumbing | Daniel Gaetan Gagne | — | (415) 763 4002 | Other | Novato · Marin County | — | — |
| Benjamin James Laplaca | Benjamin James Laplaca | — | (415) 430 7171 | GC, remodel, ADU | Novato · Marin County | — | — |
| Benjamin Pfeiffer Construction | Benjamin Austin Pfeiffer | — | (415) 328 5138 | GC, remodel, ADU | Bolinas · Marin County | — | — |
| Berardi Tile | Berardi Tile | — | (415) 258 0625 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Berglund Plumbing INC | Carl Leeroy Berglund | — | (415) 637 2269 | Other | San Rafael · Marin County | — | — |
| Bergquist Builders | Randy Shawn Raugh | — | (415) 238 6549 | GC, remodel, ADU | San Anselmo · Marin County | — | — |
| Bernard Clark | Bernard Clark | — | (415) 350 5533 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Bernardini Construction | Steven Alfred Bernardini | — | (415) 883 9663 | GC, remodel, ADU | Novato · Marin County | — | — |
| Bert Bartsch | Bert Bartsch | — | (415) 454 2874 | Electricians | Fairfax · Marin County | — | — |
| Bertoni Construction Co | Eric Joseph Bertoni | — | (415) 250 3522 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Betancourt Home Builders INC | Contreras Ricardo Betancourt | — | (415) 761 9099 | GC, remodel, ADU | Novato · Marin County | — | — |
| Better Balanced Electric | Lisa Swanson | — | (415) 793 0655 | Electricians | Novato · Marin County | — | — |
| Better Built Construction | Amir Motamed Kazeminejad | brian@betterbuiltconstruction.com | (415) 451 4786 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Better Built Construction | Michael Joseph Lewis | brian@betterbuiltconstruction.com | (415) 451 4786 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Better Than Real Artificial Grass | Jimenez Zamora Jorge | — | (415) 485 9231 | Windows, patio, painters | San Rafael · Marin County | — | — |
| Bettis Construction | David Joseph Bettis | — | (415) 302 5442 | GC, remodel, ADU | Mill Valley · Marin County | — | — |
| Bic Construction INC | Isrrael Duarte | — | (415) 942 3749 | GC, remodel, ADU | Mill Valley · Marin County | — | — |
| Bicardo Builders INC | Richard George Ii Bicardo | — | (415) 279 9864 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Big Dealit Reonovations | Rojas Escalera Gilberto | — | (415) 261 2115 | GC, remodel, ADU | Novato · Marin County | — | — |
| Big Island Plumbing | Glenn De Antunano Lopes | — | (415) 209 8142 | Other | San Rafael · Marin County | — | — |
| Bill Doughty Landscaping INC | William Howard Doughty | — | (415) 897 1361 | Windows, patio, painters | Novato · Marin County | — | — |
| Bill Moore & Associates Graphics INC | Margery Nelson Moore | — | (510) 526 0296 | Other | San Rafael · Marin County | — | — |
| Bill T Dutra | Bill T Dutra | — | (415) 258 6876 | Electricians | San Rafael · Marin County | — | — |
| Bird Busters INC | David Paul Champagne | — | (800) 551 2473 | Other | Novato · Marin County | — | — |
| Birdhouse Builders LLC | Travis James Lange | — | (415) 488 7960 | GC, remodel, ADU | Woodacre · Marin County | — | — |
| Bjork And Powers | Bjork And Powers | — | (415) 297 4534 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Bk Krill Corp | Bruce Barrett Krill | — | (415) 533 0592 | GC, remodel, ADU | San Anselmo · Marin County | — | — |
| Black Point Productions & Electrical | Thomas Howard Hazlett | — | (415) 897 7482 | Electricians | Novato · Marin County | — | — |