| Andrei Smirnov | Andrei Smirnov | — | (415) 310 9060 | Electricians | San Mateo · San Mateo County | — | — |
| Andreini Brothers INC | John Andrew Kottmeier | info@andreinibros.com | (650) 726 2065 | Other | Half Moon Bay · San Mateo County | — | — |
| Andres Cajal Enterprises DBA Blueline Floor Coverings | Cajalwillis Andrew | — | (650) 343 3281 | Other | San Mateo · San Mateo County | — | — |
| Andrew G Construction | Gaspar Andras | — | (650) 293 7527 | GC, remodel, ADU | Redwood City · San Mateo County | — | — |
| Andrew Guglielmi - Sc Properties | Andrew Guglielmi - Sc Properties | andrew@scpropsm.com | (650) 398-0281 | Property managers | San Mateo · San Mateo County | — | — |
| Andrew J Chung General Construction | Andrew Jean-oh Chung | — | (415) 559 5218 | Other | Daly City · San Mateo County | — | — |
| Andrew K Mills Plumbing INC | Andrew Kevin Mills | — | (415) 559 5728 | Other | Woodside · San Mateo County | — | — |
| Andrew Vanni Builders INC | Michael Gene Vanni | — | (650) 486 1870 | GC, remodel, ADU | San Carlos · San Mateo County | — | — |
| Andrew's Touch Painting | Andrew's Touch Painting | — | (415) 308 4043 | Windows, patio, painters | Daly City · San Mateo County | — | — |
| Andrey Pereverzev | Andrey Pereverzev | — | (650) 438 3948 | Other | Daly City · San Mateo County | — | — |
| Andro Pinto Flooring | Andro Pinto Flooring | andropintoflooring@gmail.com | (650) 898 9083 | Other | Menlo Park · San Mateo County | — | — |
| Anezinos Buildworks | Constantino Peter Anezinos | — | (650) 222 6438 | GC, remodel, ADU | Daly City · San Mateo County | — | — |
| Angel Suarez Construction INC | Miguel Angel Suarez | — | (415) 988 1431 | GC, remodel, ADU | San Bruno · San Mateo County | — | — |
| Angel's Gardening Service INC | Angelberto Cortez-Garcia | — | (650) 222 8889 | Windows, patio, painters | Redwood City · San Mateo County | — | — |
| Angeles Garcia Roofing INC | Garcia Ruben Angeles | — | (415) 533 1501 | Other roofers | Daly City · San Mateo County | — | — |
| Angelo's Roofing And Maintenance | Angel Eduardo Lemus | — | (415) 305 5405 | Other roofers | Daly City · San Mateo County | — | — |
| Annuzzi Heating And Cooling INC | Annuzzi Saverio | — | (650) 552 9885 | HVAC | South San Francisco · San Mateo County | — | — |
| Another Scaffold Company INC | Watson Kolo Poulivaati | — | (650) 871 8190 | Other | Redwood City · San Mateo County | — | — |
| Anthony G Rafello Design & Manufacturing INC | Anthony George Rafello | — | (650) 595 0400 | Other | San Carlos · San Mateo County | — | — |
| Anthony Halligan Plastering INC | Anthony Kevin Halligan | — | (650) 219 8960 | Other | San Bruno · San Mateo County | — | — |
| Antioch Design & Build | Seunghoon Chun | shayne@antiochdesignbuild.com | (650) 773 3737 | GC, remodel, ADU | Burlingame · San Mateo County | — | — |
| Antique Works | Antique Works | — | (415) 509 5437 | Windows, patio, painters | San Carlos · San Mateo County | — | — |
| Antone's Construction | Walter Stephan Feldmann | — | (650) 572 1877 | GC, remodel, ADU | San Mateo · San Mateo County | — | — |
| Antoniazzi General Contracting | Dino Walter Antoniazzi | — | (650) 888 5317 | GC, remodel, ADU | San Mateo · San Mateo County | — | — |
| Antonio Fred Whelen General Contractor | Antonio Fred Whelen General Contractor | — | (650) 726 5050 | GC, remodel, ADU | Half Moon Bay · San Mateo County | — | — |
| Antonio Sandoval Painting INC | Antonio Loeser Sandoval | — | (650) 444 8439 | Windows, patio, painters | Daly City · San Mateo County | — | — |
| Antovia Painting INC | Marco Antonio Acosta | — | (650) 766 5402 | Windows, patio, painters | Redwood City · San Mateo County | — | — |
| Antran Construction | Andy Nhat Tran | — | (650) 281 1556 | GC, remodel, ADU | Redwood City · San Mateo County | — | — |
| Ants Engineers INC | Keanway Kyi | — | (415) 806 8621 | GC, remodel, ADU | Burlingame · San Mateo County | — | — |
| Anzus | Barry Thomas Day | — | (707) 208 1706 | GC, remodel, ADU | El Granada · San Mateo County | — | — |
| Aoi Group | Baroni Andrea | — | (650) 288 8916 | GC, remodel, ADU | Burlingame · San Mateo County | — | — |
| Apa Glazing INC | Alberto Pena-Aparicio | — | (510) 673 0684 | Windows, patio, painters | South San Francisco · San Mateo County | — | — |
| Apex Construction INC | Kaki Simon Chiu | — | (415) 608 1010 | GC, remodel, ADU | Foster City · San Mateo County | — | — |
| Apex Electric & Plumbing INC | Omar Diego Fernandez | — | (650) 720 1836 | Electricians | Half Moon Bay · San Mateo County | — | — |
| Apex Premier Plaster | Apex Premier Plaster | — | (650) 922 9295 | Other | Pacifica · San Mateo County | — | — |
| Apex Pro Contractors INC | Xiao Jian Zhang | apexprocontractors@gmail.com | (650) 766 2585 | Electricians | San Bruno · San Mateo County | — | — |
| Aphora | Nguyen Viet Khoi | — | (408) 718 2521 | GC, remodel, ADU | Belmont · San Mateo County | — | — |
| Apogee Construction INC | Edward Paul Ciccarelli | — | (650) 761 4661 | GC, remodel, ADU | Menlo Park · San Mateo County | — | — |
| Appa Builders Corporation | Peter Fu Chung Hom | — | (628) 688 2215 | GC, remodel, ADU | Foster City · San Mateo County | — | — |
| Aprel Flooring INC | Gaivoronsky Jury | info@aprelflooring.com | (415) 992 1737 | Other | Pacifica · San Mateo County | — | — |