| Brilliant Construction INC | Ben Yangbin Liu | — | (415) 368 7898 | GC, remodel, ADU | Millbrae · San Mateo County | — | — |
| Brilliant Homes INC | Frank Raymond Ramirez | — | (408) 426 1736 | Electricians | Menlo Park · San Mateo County | — | — |
| Brinton General Building | Brinton General Building | — | (650) 740 6258 | GC, remodel, ADU | La Honda · San Mateo County | — | — |
| Briones & Co | Leopoldo Rigor Briones | firstname@briones.com | (415) 265 3848 | GC, remodel, ADU | San Bruno · San Mateo County | — | — |
| Briscoe Plumbing | Briscoe Plumbing | — | (650) 759 2562 | Other | El Granada · San Mateo County | — | — |
| Britannia Restoration | Peter Jacob Halpin | — | (650) 333 9237 | Electricians | San Carlos · San Mateo County | — | — |
| Brittney Construction | Bugarsky Helmut | — | (650) 740 8080 | GC, remodel, ADU | Foster City · San Mateo County | — | — |
| Britton Builders Incorporated | Christopher Gordon Britton | — | (650) 400 3505 | GC, remodel, ADU | Montara · San Mateo County | — | — |
| Broad Oaks Construction INC | Kieran O'hare | — | (415) 324 9479 | GC, remodel, ADU | Pacifica · San Mateo County | — | — |
| Brooks Building & Design | Brooks Building & Design | — | (650) 207 6128 | GC, remodel, ADU | El Granada · San Mateo County | — | — |
| Brother's Painting INC | Axel Danilo Mata Boya | — | (650) 995 0538 | Windows, patio, painters | Redwood City · San Mateo County | — | — |
| Brothers Services Tree Care INC | Diana Mercedes Valdez | — | (650) 996 0360 | Tree | Redwood City · San Mateo County | — | — |
| Broussard Painting & Decorating | Broussard Painting & Decorating | — | (650) 637 9784 | Windows, patio, painters | San Carlos · San Mateo County | — | — |
| Brown Construction | David Gene Brown | — | (650) 271 5117 | GC, remodel, ADU | Redwood City · San Mateo County | — | — |
| Bruce Bettencourt Painting Company INC | Bruce Wesley Bettencourt | — | (650) 558 1634 | Windows, patio, painters | Burlingame · San Mateo County | — | — |
| Bruce C Turner | Bruce C Turner | — | (650) 619 0626 | GC, remodel, ADU | Half Moon Bay · San Mateo County | — | — |
| Bruce Construction | Richard John Bruce | — | (650) 296 0323 | GC, remodel, ADU | San Bruno · San Mateo County | — | — |
| Bruce E Boyle Construction INC | Bruce Edward Boyle | — | (650) 366 0383 | GC, remodel, ADU | San Carlos · San Mateo County | — | — |
| Bruch Construction Company | Martin Bruch | — | (650) 307 8960 | GC, remodel, ADU | Emerald Hills · San Mateo County | — | — |
| Brunton Construction | Brunton Stephen | — | (415) 244 9245 | GC, remodel, ADU | Pacifica · San Mateo County | — | — |
| Brush Hog Tree Care INC | Krystle Amber Reneer | astigma@astigmatic.com | (650) 400 7280 | Tree | Half Moon Bay · San Mateo County | — | — |
| Bryan Michelsen Construction | Bryan Robert Michelsen | — | (650) 868 4295 | GC, remodel, ADU | Half Moon Bay · San Mateo County | — | — |
| Bryant Electric | Ronald Phillip Bryant | — | (650) 591 1864 | Electricians | San Carlos · San Mateo County | — | — |
| Brycor | Brian Peter Conliffe | — | (650) 341 1111 | GC, remodel, ADU | San Mateo · San Mateo County | — | — |
| Bryson Roofing INC | Balderas Gumaro | — | (650) 875 1808 | Other roofers | San Mateo · San Mateo County | — | — |
| Buca Builders INC | Matthew Manuel Pereira | — | (650) 630 6742 | GC, remodel, ADU | San Mateo · San Mateo County | — | — |
| Bucio Garden Service A Partnership | Jorge Leonel Jr Navas | — | (650) 291 3526 | Windows, patio, painters | San Mateo · San Mateo County | — | — |
| Budget Blinds Of Southwest Redwood City | Cassie Thi Batilo | — | (650) 503 9755 | Other | Redwood City · San Mateo County | — | — |
| Build Home Construction INC | Mohsenzadegan Sam | — | (408) 483 7788 | GC, remodel, ADU | Menlo Park · San Mateo County | — | — |
| Build Rest Construction INC | Ronald Jian Xu | — | (415) 730 0348 | GC, remodel, ADU | Millbrae · San Mateo County | — | — |
| Build Ur Dream Builders INC | Nancy Friday | — | (650) 651 7282 | Electricians | Burlingame · San Mateo County | — | — |
| Builder Dan INC | Yunlong Luo | — | (650) 759 0854 | GC, remodel, ADU | South San Francisco · San Mateo County | — | — |
| Builderduty INC | Ada Tuhoa Luu | — | (650) 689 5525 | GC, remodel, ADU | Millbrae · San Mateo County | — | — |
| Builders Guild INC | Jeffrey Gordon Gentry | — | (650) 530 2149 | GC, remodel, ADU | Portola Valley · San Mateo County | — | — |
| Builders Third Generation Construction | Bernardino Gonzales Torres | — | (650) 743 0022 | GC, remodel, ADU | Redwood City · San Mateo County | — | — |
| Buildtech Builder | Buildtech Builder | — | (650) 575 1599 | GC, remodel, ADU | Menlo Park · San Mateo County | — | — |
| Built Form Design & Construction | Armin Mark Staprans | — | (650) 279 4750 | GC, remodel, ADU | Portola Valley · San Mateo County | — | — |
| Buljan Construction | Buljan Ivan | — | (650) 653 1582 | GC, remodel, ADU | San Mateo · San Mateo County | — | — |
| Bullitt Rooter LLC | Douglas Gerard Mcclure | — | (925) 597 4437 | Other | South San Francisco · San Mateo County | — | — |
| Bullseye Plumbing | Bullseye Plumbing | — | (650) 515 6607 | Other | San Mateo · San Mateo County | — | — |