| Brennan Stronghold Construction INC | Colm John Brennan | — | (415) 269 1785 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Brian Harty Construction | Brian Martin Harty | — | (650) 302 2193 | Other | San Francisco · San Francisco County | — | — |
| Brian Lim | Brian Lim | — | (415) 753 1536 | Electricians | San Francisco · San Francisco County | — | — |
| Brian Mac Namara Construction | Brian Christopher Mac Namara | — | (415) 608 1877 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Brian Rogers Electric INC | Brian Michael Rogers | — | (415) 225 8382 | Electricians | San Francisco · San Francisco County | — | — |
| Brian Stamper | Brian Stamper | — | (415) 351 8171 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Bright Lights Electrical | Pedro Luis Jr Ceja | brightlights415@gmail.com | (510) 734 3950 | Electricians | San Francisco · San Francisco County | — | — |
| Bright Moon Construction | Luis Marcelino Gilberto | — | (415) 994 1647 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Bright Play Installations INC | Jonathan Alexis Reyes Ibarra | — | (650) 271 1353 | Other | San Francisco · San Francisco County | — | — |
| Brighter Legacy Builders INC | Victor Ernesto Funes-bolanos | — | (415) 933 4020 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Brightspark Electrical Solutions | Daniel Gregory Brosnan | — | (415) 336 5280 | Electricians | San Francisco · San Francisco County | — | — |
| Brikcolli Designs | Brikcolli Designs | — | (415) 559 6150 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Brilliant Jobs Construction LLC | Raymond Luen Kong | — | (415) 828 0998 | Electricians | San Francisco · San Francisco County | — | — |
| Brinkerhoff Construction INC | Thomas Jared Brinkerhoff | — | (415) 806 6114 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Briten Fire Service Co | Mingjia John Chang | — | (415) 713 5115 | Other | San Francisco · San Francisco County | — | — |
| Briten Fire Service INC | Mingjia John Chang | — | (415) 713 5115 | Other | San Francisco · San Francisco County | — | — |
| Broc Built Construction | Broc Monroe Johnson | — | (415) 839 7336 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Brogan Masonry | Brogan Masonry | — | (415) 810 2048 | Other | San Francisco · San Francisco County | — | — |
| Bron Plumbing INC | Brian Patrick Kearney | — | (415) 612 0189 | Other | San Francisco · San Francisco County | — | — |
| Brookline Aries Electric Company | John Alan Peters | — | (415) 239 5393 | Electricians | San Francisco · San Francisco County | — | — |
| Brophy Painting Co | Terrance Michael Brophy | — | (415) 731 6134 | Windows, patio, painters | San Francisco · San Francisco County | — | — |
| Brosnan Plumbing | Brosnan Plumbing | — | (415) 810 2031 | Other | San Francisco · San Francisco County | — | — |
| Brother Co | Zhuo Fan Zhang | — | (415) 652 7280 | Electricians | San Francisco · San Francisco County | — | — |
| Brother Steel INC | Zhuoran Liang | info@brother-steel.com | (415) 819 1983 | Other | San Francisco · San Francisco County | — | — |
| Brotherhu Builders Construction INC | Yushen Hu | — | (415) 706 6226 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Brothers Lui INC | Vincent Yeem Po Lui | — | (415) 810 5578 | Electricians | San Francisco · San Francisco County | — | — |
| Broucaret Landscaping | Broucaret Landscaping | — | (415) 716 8908 | Windows, patio, painters | San Francisco · San Francisco County | — | — |
| Brown Builders | Brown Builders | — | (415) 827 7660 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Bruce Lowell Bigelow DBA Bigeloworks | Bruce Lowell Bigelow DBA Bigeloworks | — | (415) 279 1851 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Bruce Paul Binder | Bruce Paul Binder | — | (415) 244 8963 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Bruce Ponce | Bruce Ponce | — | (415) 680 4474 | Electricians | San Francisco · San Francisco County | — | — |
| Brumfield Construction | Luna Miller Brumfield | — | (415) 374 6643 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Bruno Marmi & Tile | Bruno Marmi & Tile | — | (415) 577 5506 | Other | San Francisco · San Francisco County | — | — |
| Brushin' Around Painting Company | Carlos Tijero | brushinaroundpainting@gmail.com | (415) 791 2018 | Windows, patio, painters | San Francisco · San Francisco County | — | — |
| Bryan J Valverde Co | Bryan Joseph Valverde | — | (415) 367 5963 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Bryan Poli Electrical Contractor | Bryan Lawrence Poli | — | (415) 309 8793 | Electricians | San Francisco · San Francisco County | — | — |
| Buck Construction | Wade Joseph Buckholz | — | (415) 370 0996 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Buck O'neill Builders INC | Buck Edward O'neill | info@buckoneillbuilders.com | (415) 652 4723 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Buckner Painting | Buckner Painting | — | (415) 264 2694 | Windows, patio, painters | San Francisco · San Francisco County | — | — |
| Budget Blinds Of San Francisco Central | Brett Rene' Jones | — | (415) 621 6454 | Other | San Francisco · San Francisco County | — | — |