| Bonsai Garden Experts INC | Garcia-apale Gregorio | bonsaigardencare@gmail.com | (650) 720 8270 | Windows, patio, painters | Redwood City · San Mateo County | — | — |
| Boomerang Construction | Georgievski Vlasta | — | (650) 921 6554 | GC, remodel, ADU | Foster City · San Mateo County | — | — |
| Borgen's Painting | Borgen's Painting | — | (650) 630 8358 | Windows, patio, painters | San Mateo · San Mateo County | — | — |
| Borgo Marble And Granite INC | Jose Luis Borgo | — | (650) 366 2575 | Other | Redwood City · San Mateo County | — | — |
| Boris Dimitshteyn | Boris Dimitshteyn | — | (415) 377 5159 | Electricians | Pacifica · San Mateo County | — | — |
| Boris Pankratov | Boris Pankratov | — | (415) 722 8658 | GC, remodel, ADU | Millbrae · San Mateo County | — | — |
| Botelho Electric | Eric John Botelho | — | (415) 260 3200 | Electricians | San Bruno · San Mateo County | — | — |
| Bowen Construction - Painting And Waterproofing | Michael Timothy Bowen | — | (415) 850 0552 | GC, remodel, ADU | Daly City · San Mateo County | — | — |
| Bowie Construction & Engineering INC | Robert Eads Bowie | — | (650) 595 8459 | GC, remodel, ADU | Belmont · San Mateo County | — | — |
| Bp Tile | Bp Tile | — | (650) 588 9705 | Other | South San Francisco · San Mateo County | — | — |
| Bpb Electric | Benjamin Paul Bray-montwill | — | (650) 296 9872 | Electricians | San Bruno · San Mateo County | — | — |
| Bpd Painting Services & Chimney Inspection Ltd | Bpd Painting Services & Chimney Inspection Ltd | — | (209) 265-9892 | Inspectors | San Mateo · San Mateo County | — | — |
| Brad Lee Stratton | Brad Lee Stratton | — | (650) 281 9285 | Other | Redwood City · San Mateo County | — | — |
| Bradford Co | Troy William Bradford | — | (650) 291 6660 | Windows, patio, painters | Daly City · San Mateo County | — | — |
| Bradley Construction Enterprises | James Richard Bradley | — | (650) 575 1924 | GC, remodel, ADU | Redwood City · San Mateo County | — | — |
| Bradshaw Construction | Mathew Joel Bradshaw | — | (650) 438 7339 | GC, remodel, ADU | Pacifica · San Mateo County | — | — |
| Brady Air Conditioning INC | Jason Andrew Hillard | — | (650) 742 9640 | HVAC | South San Francisco · San Mateo County | — | — |
| Brady Air Service INC | Andrew Donald Hillard | — | (650) 742 9640 | HVAC | South San Francisco · San Mateo County | — | — |
| Brady Construction INC | Bernard James Brady | info@bradyconstruction.com | (415) 678 6805 | GC, remodel, ADU | San Bruno · San Mateo County | — | — |
| Bragato Paving Company INC | Christopher Raymond Bragato | — | (650) 592 7828 | Other | San Carlos · San Mateo County | — | — |
| Branko Kruslin Painting And Construction | Kruslin Branko | — | (650) 400 0195 | GC, remodel, ADU | Redwood City · San Mateo County | — | — |
| Branz Built | Branz Built | — | (650) 796 9777 | GC, remodel, ADU | San Mateo · San Mateo County | — | — |
| Brayer Construction & Design | Raymond Joseph Brayer | — | (650) 465 1845 | GC, remodel, ADU | Burlingame · San Mateo County | — | — |
| Breathable | Breathable | hello@breathable.com | (650) 319-3880 | HVAC | San Mateo · San Mateo County | — | — |
| Brehm Brothers LLC | Brendan Luke Brehm | brehmbrothers@gmail.com | (650) 576 8482 | GC, remodel, ADU | El Granada · San Mateo County | — | — |
| Brendan J Uniacke Construction | Brendan Joseph Uniacke | — | (415) 203 3305 | GC, remodel, ADU | San Bruno · San Mateo County | — | — |
| Brenden Casey Construction | Brenden Joseph Casey | — | (650) 281 1409 | GC, remodel, ADU | Emerald Hills · San Mateo County | — | — |
| Brenes Construction | Carlos Alberto Brenes | — | (415) 724 9813 | GC, remodel, ADU | Daly City · San Mateo County | — | — |
| Breslin Electric | Michael John Breslin | — | (415) 335 2159 | Electricians | San Carlos · San Mateo County | — | — |
| Bret Bliss Construction | Bret Anthony Bliss | — | (650) 888 3572 | GC, remodel, ADU | El Granada · San Mateo County | — | — |
| Bretao Tile And Stone | Bretao Tile And Stone | — | (650) 799 9218 | GC, remodel, ADU | Half Moon Bay · San Mateo County | — | — |
| Brian Decker | Brian Decker | tile@briandecker.com | (415) 215 0269 | GC, remodel, ADU | San Carlos · San Mateo County | — | — |
| Brian Garcia Construction | Brian Clay Garcia | — | (650) 464 1885 | GC, remodel, ADU | Redwood City · San Mateo County | — | — |
| Brian Lawson Construction | Brian Keith Lawson | — | (650) 207 2810 | GC, remodel, ADU | La Honda · San Mateo County | — | — |
| Brian Sagrafena | Brian Sagrafena | — | (650) 430 8360 | Electricians | La Honda · San Mateo County | — | — |
| Bridge Electrical | Jarlath Peter Magee | info@bridgeelectrical.co.uk | (415) 418 4185 | Electricians | Millbrae · San Mateo County | — | — |
| Bright Built | Bright Built | — | (650) 636 5245 | GC, remodel, ADU | Half Moon Bay · San Mateo County | — | — |
| Bright Electrics INC | Solorio Ignacio | — | (415) 850 9580 | Electricians | Redwood City · San Mateo County | — | — |
| Brighten Up Electric | Shawn Dallas Barnett | — | (650) 520 8914 | Electricians | Belmont · San Mateo County | — | — |
| Brighter Bay Builders INC | Andres R Tobar | — | (415) 225 8732 | GC, remodel, ADU | South San Francisco · San Mateo County | — | — |