| Bay Tech Engineering INC | Angelo Anthony Kalaveras | — | (415) 760 6100 | Electricians | San Francisco · San Francisco County | — | — |
| Bay Tek Builders INC | John Wang-Mei Lau | — | (415) 710 9994 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Bay Tile And Stone INC | Dennis Michael Franco | — | (415) 706 3346 | Other | San Francisco · San Francisco County | — | — |
| Bay Tint INC | Mayorga Benjamin | — | (415) 867 1440 | Other | San Francisco · San Francisco County | — | — |
| Bay View International INC | Randall Wan Fat Tse | — | (415) 716 3030 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Bay-tech Electric INC | Joseph Manuel Montiel | — | (415) 716 2307 | Electricians | San Francisco · San Francisco County | — | — |
| Baya Builders LLC | Mohamad Jafar Rashedi | bayabuilders@gmail.com | (408) 533-5957 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Bayside Construction | Rugg Richard | — | (415) 310 0169 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Bayside Plumbing INC | Zulma Lopez | — | (415) 505 3335 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Baytech Works INC | Alan Lei | — | (415) 286 1235 | Electricians | San Francisco · San Francisco County | — | — |
| Bayview Construction Engineers | James F Blanding | — | (415) 822 8793 | Other | San Francisco · San Francisco County | — | — |
| Bayview Renovation & Development INC | Juan Moises Garcia | — | (415) 254 6221 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Bayward Builders | Bayward Builders | — | (510) 847 8890 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Bbi Installed Systems | James Edward Sallee | — | (415) 695 9555 | Electricians | San Francisco · San Francisco County | — | — |
| Bcci Construction LLC | David Andrew Herskowitz | — | (415) 817 5100 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Bcw Construction | Wu Bai-chao | — | (415) 867 3102 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Be James Team | Iaroslav Nikitin | — | (415) 202 6002 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Be Pro Construction INC | Yilin Deng | — | (415) 503 8189 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Bearking Painting | Bearking Painting | — | (415) 524 5133 | Windows, patio, painters | San Francisco · San Francisco County | — | — |
| Beautiful Hardwood Floor INC | Anh Quang Phan | — | (415) 586 8460 | Other | San Francisco · San Francisco County | — | — |
| Beauty Garden Landscaping | Beauty Garden Landscaping | — | (510) 691 8852 | Windows, patio, painters | San Francisco · San Francisco County | — | — |
| Beauvais Geraldine | Beauvais Geraldine | — | (415) 271 2762 | Other | San Francisco · San Francisco County | — | — |
| Beck Custom Remodel | Beck Custom Remodel | — | (608) 358 3248 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Becker Fuel Systems | Travis Paul Becker | — | (415) 740 2080 | Electricians | San Francisco · San Francisco County | — | — |
| Bed Bug Exterminator San Francisco | Bed Bug Exterminator San Francisco | — | (415) 579-2399 | Pest, tile roofs | San Francisco · San Francisco County | — | — |
| Bedrock Construction & Development INC | Leonard Ii Krasowski | — | (415) 902 5164 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Beeline Painting LLC | Joseph Michael Meservey | justin@beelinepainting.com | (415) 684 2926 | Windows, patio, painters | San Francisco · San Francisco County | — | — |
| Bejarano Construction INC | Yiu Ming Cheung | — | (408) 603 4837 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Beker Garage Door Repair INC | Eran Ben Golan | — | (415) 818 3189 | Other | San Francisco · San Francisco County | — | — |
| Bella Vita Garden Design | Bella Vita Garden Design | — | (415) 648 0100 | Windows, patio, painters | San Francisco · San Francisco County | — | — |
| Ben Chen Design And Construction INC | Paul Khoung Vou | — | (415) 310 1522 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Benfield Works | Benfield Works | — | (415) 606 7401 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Benjamin Shaw | Benjamin Shaw | — | (415) 517 4158 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Benkee Electrical & Const Co | Ben T Wong | — | (415) 812 3488 | Electricians | San Francisco · San Francisco County | — | — |
| Benlo Plumbing INC | Chee Bing Lo | — | (415) 999 8909 | Other | San Francisco · San Francisco County | — | — |
| Bennett Electric | Brian Fintan Bennett | — | (415) 505 0756 | Electricians | San Francisco · San Francisco County | — | — |
| Benson Painting | Benson Painting | — | (650) 521 3834 | Windows, patio, painters | San Francisco · San Francisco County | — | — |
| Bent D Petersen | Bent D Petersen | — | (415) 717 6743 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Berco | Richard Frank Dewey | — | (415) 466 6338 | HVAC | San Francisco · San Francisco County | — | — |
| Bernal Hill Builders INC | Joshua Chavez | info@bernalhillbuilders.com | (415) 294 0018 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |