| Beloli Ventures DBA Lexus Construction | Gordon Phuong Tonthat | — | (415) 816 7728 | GC, remodel, ADU | San Mateo · San Mateo County | — | — |
| Belvoir Construction INC | Matthew James Smith | — | (415) 509 9395 | GC, remodel, ADU | Burlingame · San Mateo County | — | — |
| Ben Liu | Ben Liu | — | (415) 368 7898 | GC, remodel, ADU | Millbrae · San Mateo County | — | — |
| Benchmark Builders INC | Justin Michael Kurpius | — | (650) 325 2155 | GC, remodel, ADU | Menlo Park · San Mateo County | — | — |
| Benito General Construction INC | Lopez Benito Hernandez | benitogeneralco@gmail.com | (415) 574 9106 | GC, remodel, ADU | Daly City · San Mateo County | — | — |
| Benjamin Peter & Co INC | Benjamin Peter Mc Donnell | — | (650) 654 8005 | GC, remodel, ADU | Burlingame · San Mateo County | — | — |
| Bennett Electric LLC | Robert Lee Bennett | — | (415) 378 7695 | Electricians | Pescadero · San Mateo County | — | — |
| Bennett General Contractors | Kevin Graham Bennett | — | (650) 996 7264 | GC, remodel, ADU | San Mateo · San Mateo County | — | — |
| Benny Morales Roofing & Painting INC | Bernardino Morales Mendoza | — | (650) 787 8189 | Other roofers | Redwood City · San Mateo County | — | — |
| Benson & Son Electric INC | John Patrick Benson | — | (650) 312 8222 | Electricians | San Mateo · San Mateo County | — | — |
| Bentos Flooring | Bentos Flooring | — | (415) 505 7857 | Other | Pacifica · San Mateo County | — | — |
| Beny's Iron Works | Beny's Iron Works | — | (415) 740 8599 | Other | South San Francisco · San Mateo County | — | — |
| Bera Construction INC | Sergio Fabian Barbera | — | (650) 670 7512 | GC, remodel, ADU | Redwood City · San Mateo County | — | — |
| Berend Design & Construction | Randall John Berend | — | (650) 219 4232 | GC, remodel, ADU | Pacifica · San Mateo County | — | — |
| Berg's Heating And Service Co | Duane Richard Berg | — | (650) 359 1229 | HVAC | Pacifica · San Mateo County | — | — |
| Berger Hardware INC | Berger Hardware INC | — | (619) 268-1885 | Windows, patio, painters | Encinitas · San Mateo County | — | — |
| Berkey Enterprises INC | James Calvin Berkey | — | (415) 269 3792 | GC, remodel, ADU | South San Francisco · San Mateo County | — | — |
| Berlin Food & Lab Equipment Co | Mark Aaron Cottonaro | — | (650) 589 4231 | Other | South San Francisco · San Mateo County | — | — |
| Bertken Landscapes | Bertken Landscapes | — | (650) 302 7013 | Windows, patio, painters | San Mateo · San Mateo County | — | — |
| Best Care Fire Protection | Best Care Fire Protection | — | (415) 920 3929 | Other | Daly City · San Mateo County | — | — |
| Best Exteriors | Best Exteriors | — | (888) 853-6277 | Windows, patio, painters | San Mateo · San Mateo County | — | — |
| Better Building Construction | Kyle Zhan Wen Zhou | — | (415) 465 0552 | Electricians | Daly City · San Mateo County | — | — |
| Better Construction Ltd | Ho On Louie | — | (415) 441 1328 | Electricians | Daly City · San Mateo County | — | — |
| Better Home Development INC | Zhaolin Guan | — | (415) 939 1871 | GC, remodel, ADU | Burlingame · San Mateo County | — | — |
| Bevilacqua & Sons INC | Paul Louis Bevilacqua | — | (650) 616 4900 | GC, remodel, ADU | South San Francisco · San Mateo County | — | — |
| Beyond Builders | Beyond Builders | interested@domainmarket.com | (650) 544 4478 | GC, remodel, ADU | San Carlos · San Mateo County | — | — |
| Bg Design Build PC | Ghassemzadeh Bahman | bahman@bgdesignbuild.com | (650) 678 0234 | GC, remodel, ADU | Hillsborough · San Mateo County | — | — |
| Big Cat Construction Corp | Freddy Salto | bigcatconstructionllc01@gmail.com | (707) 317 8768 | GC, remodel, ADU | Redwood City · San Mateo County | — | — |
| Big Green Tree | Big Green Tree | — | (650) 344-6451 | Tree | San Mateo · San Mateo County | — | — |
| Big Oak Hardwood Floor Company INC | Richard Joseph Mack | — | (650) 591 8651 | Other | San Carlos · San Mateo County | — | — |
| Bijan Construction | Bijan Oliver Aalami | — | (650) 255 8010 | GC, remodel, ADU | Redwood City · San Mateo County | — | — |
| Bill Komashko | Bill Komashko | — | (650) 996 3994 | GC, remodel, ADU | San Bruno · San Mateo County | — | — |
| Bill's Construction Co INC | Jason Lai | — | (415) 699 1930 | GC, remodel, ADU | Daly City · San Mateo County | — | — |
| Billinger Painting Company | Billinger Chester | chester_billinger@yahoo.com | (415) 637 5798 | Windows, patio, painters | Daly City · San Mateo County | — | — |
| Birch Builders LLC | Matthew John Frederick | — | (650) 464 2677 | GC, remodel, ADU | San Carlos · San Mateo County | — | — |
| Birkeland Corporation | Michael Nils Birkeland | — | (415) 480 6062 | Electricians | San Bruno · San Mateo County | — | — |
| Bishop Construction | Gary Lee Bishop | admin@bishopconstruction.com | (707) 486 3643 | GC, remodel, ADU | Woodside · San Mateo County | — | — |
| Bit Electrical INC | Sergey Ivanovich Ivanov | — | (415) 810 2843 | Electricians | Daly City · San Mateo County | — | — |
| Bizpie | Jae Kyong Roh | — | (650) 520 1797 | Electricians | Redwood City · San Mateo County | — | — |
| Bizzarro's Home Remodeling | Bizzarro's Home Remodeling | — | (650) 766 6253 | GC, remodel, ADU | Woodside · San Mateo County | — | — |