| 0303 Construction INC | Juan Manuel Ortega | — | (650) 452 2720 | GC, remodel, ADU | Pacifica · San Mateo County | — | — |
| 101 Mobility | Raul Emmanuel Navarro | — | (650) 614 1533 | GC, remodel, ADU | Burlingame · San Mateo County | — | — |
| 12 Stone Construction Co | Caesar Carlos Evangelista | — | (352) 217 6490 | GC, remodel, ADU | San Bruno · San Mateo County | — | — |
| 2B Living INC | Patricia Wynne Baskin | — | (650) 763 8552 | GC, remodel, ADU | San Carlos · San Mateo County | — | — |
| 2nd Generation Development INC DBA Bay Area Pervious Concrete | Liguori David | — | (650) 596 0683 | GC, remodel, ADU | San Carlos · San Mateo County | — | — |
| 3 N 1 Construction INC | Mak Ka Wang | info@nconstruction.com | (415) 310 8878 | GC, remodel, ADU | South San Francisco · San Mateo County | — | — |
| 369 Construction Co INC | Qi Hua| Zhao Qi-hua Zhao | — | (415) 828 1131 | GC, remodel, ADU | Daly City · San Mateo County | — | — |
| 3J Construction | Sandy Orquiza Alvarez | impallari@gmail.com | (415) 794 0225 | GC, remodel, ADU | Daly City · San Mateo County | — | — |
| 415 Design+build | Larry Ely Fonseca | — | (415) 347 5627 | GC, remodel, ADU | Brisbane · San Mateo County | — | — |
| 88 Builders | Weiying Zhu | — | (415) 264 5807 | GC, remodel, ADU | Daly City · San Mateo County | — | — |
| A & A General Building Construction Inc. | Timothy Viloria Anunciacion | — | (650) 757 7600 | GC, remodel, ADU | Daly City · San Mateo County | — | — |
| A & C United Construction | Timothy Ting-Di Wu | — | (415) 347 1368 | GC, remodel, ADU | South San Francisco · San Mateo County | — | — |
| A & S Quality Builders Company | Kryukov Sergey | — | (415) 279 5705 | GC, remodel, ADU | South San Francisco · San Mateo County | — | — |
| A - Mac Construction | Adrian Joseph Mc Glinchey | — | (415) 601 4698 | GC, remodel, ADU | San Mateo · San Mateo County | — | — |
| A A A Avalon Builder Corporation | Shahin Sazegari | — | (650) 504 9978 | GC, remodel, ADU | San Mateo · San Mateo County | — | — |
| A A Builders & Company | Arturo| Alcanta R Arturo Jr Alcantar | — | (650) 504 4294 | GC, remodel, ADU | South San Francisco · San Mateo County | — | — |
| A A Construction Group INC | Arnoldo Rivera Verduzco | — | (650) 328 1530 | GC, remodel, ADU | Menlo Park · San Mateo County | — | — |
| A Aleshin's Construction | Anton Alekseyevich Aleshin | — | (559) 250 3658 | GC, remodel, ADU | Foster City · San Mateo County | — | — |
| A B Construction Company | David Joseph Barrett | — | (650) 515 6822 | GC, remodel, ADU | Daly City · San Mateo County | — | — |
| A C A Builders Group INC | Abner Abigail Esquivel Martinez | — | (510) 289 4388 | GC, remodel, ADU | South San Francisco · San Mateo County | — | — |
| A C G Construction INC | Charles Allen Graves | — | (650) 345 2082 | GC, remodel, ADU | Burlingame · San Mateo County | — | — |
| A G G General Contractor | A G G General Contractor | — | (650) 465 2363 | GC, remodel, ADU | Redwood City · San Mateo County | — | — |
| A Green Home | Jack Charles Salvato | — | (650) 400 3600 | GC, remodel, ADU | San Mateo · San Mateo County | — | — |
| A H Construction | Austin Joseph Harkin | sales@ahconstruction.com | (415) 420 1660 | GC, remodel, ADU | Montara · San Mateo County | — | — |
| A H R Construction | Herrera Gomez Anabell | — | (650) 773 6108 | GC, remodel, ADU | Burlingame · San Mateo County | — | — |
| A Honey Do List Handyman | A Honey Do List Handyman | — | (650) 678 9472 | GC, remodel, ADU | Belmont · San Mateo County | — | — |
| A I M Consolutions INC | Li Hailin | — | (650) 918 8715 | GC, remodel, ADU | Burlingame · San Mateo County | — | — |
| A J Peet Construction | Adam James Peet | — | (650) 302 2998 | GC, remodel, ADU | San Carlos · San Mateo County | — | — |
| A K Construction | Andre Victor Kaprielian | — | (650) 343 7335 | GC, remodel, ADU | San Mateo · San Mateo County | — | — |
| A K Home Improvement INC | Kustura Anatoliy | — | (415) 279 1426 | GC, remodel, ADU | Daly City · San Mateo County | — | — |
| A L B Design & Construction | Allan Levoit Baquilar | — | (415) 533 3988 | GC, remodel, ADU | Daly City · San Mateo County | — | — |
| A L M 2 | A L M 2 | — | (650) 622 2832 | GC, remodel, ADU | Half Moon Bay · San Mateo County | — | — |
| A N R Development | A N R Development | — | (415) 650 8599 | GC, remodel, ADU | Daly City · San Mateo County | — | — |
| A P Consulting Engineers INC | Anthony Christopher Ponterio | — | (650) 773 5793 | GC, remodel, ADU | Hillsborough · San Mateo County | — | — |
| A Perez Construction | Alfonso Martin Perez | — | (650) 508 1569 | GC, remodel, ADU | San Carlos · San Mateo County | — | — |
| A Plus Building Maintenance LLC | Jose Luis Mendez | — | (650) 787 2977 | GC, remodel, ADU | South San Francisco · San Mateo County | — | — |
| A Q Construction | Wah Kwan To | — | (510) 219 8228 | GC, remodel, ADU | Millbrae · San Mateo County | — | — |
| A R Construction | Milton Adolfo Rosales Choy | — | (415) 225 2267 | GC, remodel, ADU | San Mateo · San Mateo County | — | — |
| A Ravella Construction And Engineering | Andrew Joseph Ravella | — | (650) 483 7356 | GC, remodel, ADU | San Carlos · San Mateo County | — | — |
| A Schaefer Construction | Andrew Alfons Schaefer | — | (650) 240 6448 | GC, remodel, ADU | San Mateo · San Mateo County | — | — |