| Albert Chow | Albert Chow | — | (415) 566 1511 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Albert G Lee | Albert G Lee | — | (415) 333 6438 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Albion Power Company INC | Charles Anthony Adams | — | (415) 558 1786 | Electricians | San Francisco · San Francisco County | — | — |
| Alcides Electric Ja | Jorge Alcides Pena Arbues | — | (415) 573 4718 | Electricians | San Francisco · San Francisco County | — | — |
| Alder Construction Ca | Conor Hugh Camillu Mc Mahon | — | (415) 960 7256 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Alec Morgan Construction INC | Alec Charles Morgan | — | (415) 936 3614 | Other | San Francisco · San Francisco County | — | — |
| Alejandro Diaz DBA Ad Painting Co | Diaz Alejandro | — | (415) 806 9185 | Windows, patio, painters | San Francisco · San Francisco County | — | — |
| Alert Pest Control Company | Alert Pest Control Company | — | (650) 756-2225 | Pest, tile roofs | Daly City · San Francisco County | — | — |
| Alex Chu General Contractor | Alex Chu General Contractor | — | (415) 722 0543 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Alex Construction & Electric INC | Xiao Hui Wu | — | (415) 602 0139 | Electricians | San Francisco · San Francisco County | — | — |
| Alex Davison | Alex Davison | — | (415) 756 2865 | Windows, patio, painters | San Francisco · San Francisco County | — | — |
| Alex He General Construction | Fei Yang He | — | (415) 680 0305 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Alex Kushner General Contractor | Alex Kushner General Contractor | — | (415) 756 0945 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Alex Kushner General INC | Alexander Arkady Kushner | — | (415) 756 0945 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Alex R Construction | Rosillo Alejandro | — | (415) 797 2002 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Alex Sebastian | Alex Sebastian | alguien@ejemplo.com | (415) 250 8451 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Alex Sweeney Construction INC | Alex Michael Sweeney | — | (415) 916 9338 | Other | San Francisco · San Francisco County | — | — |
| Alex Wong Construction INC | Foo Cheung Wong | — | (415) 265 9650 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Alex's Custom Tile | Alex's Custom Tile | — | (415) 806 4524 | Other | San Francisco · San Francisco County | — | — |
| Alfa Building Solutions INC | Viktoria Igor Savtchouk | — | (415) 734 8167 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Algami Roofing | Miguel Angel Aguilar Hernandez | algamiroofing@gmail.com | (415) 676 9081 | Other roofers | San Francisco · San Francisco County | — | — |
| All Around Builder | All Around Builder | — | (415) 336 0162 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| All Bay Cities Construction | Guorong Zhou | — | (415) 716 7023 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| All Bay Solar Construction INC | Carlos Arnoldo Aguirre | — | (415) 624 3535 | Other roofers | San Francisco · San Francisco County | — | — |
| All City Electric | Robert Kaw Hing Young | — | (650) 865 0562 | Electricians | San Francisco · San Francisco County | — | — |
| All Phase Electrical Incorporated | Carlos Francisco Najarro-calderon | — | (415) 533 6327 | Electricians | San Francisco · San Francisco County | — | — |
| All Pro Downes Construction Company | Patrick Brendan Downes | — | (415) 375 2564 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| All Rooter & Plumbing Service INC | Minh Gia Luc | — | (415) 282 8289 | Other | San Francisco · San Francisco County | — | — |
| All Trusty Builders | Sam Xu | — | (415) 987 7713 | Electricians | San Francisco · San Francisco County | — | — |
| All-electric California | Marc Jonathan Loran | allelectriccalifornia@gmail.com | (415) 430 7817 | HVAC | San Francisco · San Francisco County | — | — |
| All-star Marble And Granite Corp | Nestor Romeo Rodriguez Zepeda | — | (408) 460 1017 | Other | San Francisco · San Francisco County | — | — |
| Allen Electric | Joshua David Allen | — | (650) 888 0434 | Electricians | San Francisco · San Francisco County | — | — |
| Allen Jian Min Li | Allen Jian Min Li | — | (415) 613 9096 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Alley Cat | Alley Cat | — | (415) 226-0600 | Pest, tile roofs | San Francisco · San Francisco County | — | — |
| Alliance Plumbing Works INC | Samuel Joe Leung | — | (415) 850 5022 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Allied Restoration Company | Allied Restoration Company | — | (415) 529-5637 | Restoration | San Francisco · San Francisco County | — | — |
| Allied Teamwork Construction INC | Harley Hua Wu | — | (415) 606 2060 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Allpro Painting And Restoration INC | Susan Sonkyong Chung | — | (415) 350 4102 | Windows, patio, painters | San Francisco · San Francisco County | — | — |
| Allstream Construction LLC | Niall Michael O'connell | — | (650) 380 8923 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Alltrade Hitech Construction | Rholand Bedad Fajardo | — | (415) 400 9888 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |