| Andes Construction Incorporated | Danilo Mayorga | — | (510) 536 7832 | Other | Oakland · Alameda County | — | — |
| Andre Bonterre Painting & Color Design | Hubert Andre Vaughan Bonterre | — | (415) 420 2333 | Windows, patio, painters | Oakland · Alameda County | — | — |
| Andre R Mirek | Andre R Mirek | — | (510) 507 3144 | GC, remodel, ADU | Alameda · Alameda County | — | — |
| Andreasen Security Safe INC | Terry Val Andreasen | — | (510) 732 8710 | Alarm and generators | Hayward · Alameda County | — | — |
| Andreoni & Stanton | Thomas Lido Andreoni | — | (510) 595 3600 | GC, remodel, ADU | Piedmont · Alameda County | — | — |
| Andrew Baca Contracting Services | Andrew Patrick Baca | — | (510) 709 6868 | GC, remodel, ADU | Newark · Alameda County | — | — |
| Andrew Carothers - Liske INC | Andrew Allen Carothers-liske | — | (510) 410 1722 | Other | Oakland · Alameda County | — | — |
| Andrew Chekene Enterprises INC DBA A C Enterprises | Andrew Daniel Chekene | — | (650) 588 1001 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Andrew Chih-ping Chou | Andrew Chih-ping Chou | — | (510) 415 9688 | GC, remodel, ADU | Union City · Alameda County | — | — |
| Andrew Howard Garay | Andrew Howard Garay | — | (510) 923 9100 | GC, remodel, ADU | Emeryville · Alameda County | — | — |
| Andrew M Jordan INC DBA A & B Construction | Zachary Florencio Varela | — | (510) 999 6000 | Other | Oakland · Alameda County | — | — |
| Andrew Mak | Andrew Mak | — | (408) 444 1663 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| Andrew Morrall Architect And General Contractor | Andrew Bruce Morrall | — | (415) 341 5980 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Andrew Vincent Builder | Andrew Vincent Builder | — | (510) 478 5938 | GC, remodel, ADU | Castro Valley · Alameda County | — | — |
| Andrew's Tile | Andrew's Tile | — | (415) 424 5723 | Other | Alameda · Alameda County | — | — |
| Andy J Frasheski | Andy J Frasheski | — | (510) 318 2258 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Andy Nolans Professional Plumbing LLC | Andy Nolan | — | (858) 212 7441 | Other | Fremont · Alameda County | — | — |
| Andy's Roofing Co INC | Jonathan Wayne Engquist | — | (510) 777 1100 | Other roofers | San Leandro · Alameda County | — | — |
| Angelito Perez | Angelito Perez | — | (510) 449 2026 | GC, remodel, ADU | Union City · Alameda County | — | — |
| Angress Construction | Eric Ernest Angress | — | (510) 376 8683 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Angular Landscaping | Duy Van Truong | — | (510) 282 4386 | Windows, patio, painters | Hayward · Alameda County | — | — |
| Ankor General Contractor | Ankor General Contractor | — | (510) 598 9725 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Anleu Construction INC | Luis Leonardo Reyes | — | (510) 504 3484 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Anmoldeep Singh Construction | Anmoldeep Singh Khehra | — | (510) 673 2703 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| Anning - Johnson Company | James Richard Kasella | — | (510) 670 0100 | Other roofers | Hayward · Alameda County | — | — |
| Anova Build INC | Nicholas R Xu | — | (415) 627 8854 | GC, remodel, ADU | Alameda · Alameda County | — | — |
| Antell HVAC & Electric LLC | Raluy Andres Tello | — | (510) 330-2240 | HVAC | Hayward · Alameda County | — | — |
| Anthon Incorporated | Ronald Eugene Anthon | — | (925) 584 6871 | Other | Livermore · Alameda County | — | — |
| Anthony C Cirella | Anthony C Cirella | — | (510) 872 3100 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Anvil Builders INC | Richard Joseph Leider | — | (415) 285 5000 | Electricians | Emeryville · Alameda County | — | — |
| Anvil Builders INC DBA Atlas Sonoma Tree Surgery | Alan Caulfield Guy | — | (415) 285 5000 | Tree | Emeryville · Alameda County | — | — |
| Anvil Power INC | Richard Joseph Leider | — | (415) 285 5000 | Electricians | Emeryville · Alameda County | — | — |
| Anvil Power INC DBA Atlas Tree Surgery | Alan Caulfield Guy | — | (415) 285 5000 | Tree | Emeryville · Alameda County | — | — |
| Anvil Precision Jv | Builders INC Anvil | — | (415) 285 5000 | Electricians | Emeryville · Alameda County | — | — |
| Anxin United | Anxin United | — | (510) 520 0129 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Anxin United INC | Antony Gao | — | (510) 520 0129 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Anyi Landscape Studio | Anyi Landscape Studio | — | (650) 533 0107 | Windows, patio, painters | Union City · Alameda County | — | — |
| Anykind Construction | Glen George Jr Campman | — | (510) 459 7938 | GC, remodel, ADU | Castro Valley · Alameda County | — | — |
| Anytime Plumbing Service | David Franco Quinonez | — | (925) 373 6796 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| Anytime Tree Specialist | Anytime Tree Specialist | — | (510) 713 1367 | Tree | Fremont · Alameda County | — | — |