| A C V Roofing INC | Adrian Villanueva | — | (510) 535 2580 | Other roofers | Oakland · Alameda County | — | — |
| A Christian Glass And Mirror | A Christian Glass And Mirror | amkryukov@gmail.com | (510) 725 8498 | Windows, patio, painters | Newark · Alameda County | — | — |
| A Cut Above Construction | Kyle Daniel Plotz | — | (925) 784 5294 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| A Cut Above Wallcovering | A Cut Above Wallcovering | — | (925) 519 2319 | Other | Pleasanton · Alameda County | — | — |
| A D Melchner General Engineering | A D Melchner General Engineering | — | (415) 410 7831 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| A D R Fire Protection | A D R Fire Protection | — | (510) 750 3909 | Other | Union City · Alameda County | — | — |
| A G & L Builders Corp | Steve Lujano | — | (408) 561 0854 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| A G - Comm Co | Togtokh Tumurbaatar | info@agcomm.com | (510) 375 1435 | Electricians | Berkeley · Alameda County | — | — |
| A G M Artistic Signs | A G M Artistic Signs | — | (925) 833 7446 | Other | Livermore · Alameda County | — | — |
| A G Natural Stone | A G Natural Stone | — | (510) 887 8359 | Other | Hayward · Alameda County | — | — |
| A Good Plumber INC | Gary Alfred Confenti | — | (510) 376 9098 | Other | Livermore · Alameda County | — | — |
| A H Construction | Hernandez Duenas Agustin | sales@ahconstruction.com | (510) 631 9011 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| A H Construction | Hassine Avner | sales@ahconstruction.com | (408) 210 5277 | HVAC | Fremont · Alameda County | — | — |
| A Handyman Jaime Fletcher | A Handyman Jaime Fletcher | — | (510) 418 3128 | GC, remodel, ADU | Emeryville · Alameda County | — | — |
| A J Construction | Pal Ajay | — | (510) 789 7006 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| A J Heating & Cooling INC | Jose Garnica-Flores | — | (510) 489 2382 | HVAC | Union City · Alameda County | — | — |
| A Jie Construction INC | Wei Ying Huang | — | (925) 388 8828 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| A L C Services Company | Adam Orren Lewis | — | (925) 800 5736 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| A L Color Painting LLC | Marco Antonio Razon Cervantes | — | (510) 927 8767 | Windows, patio, painters | Castro Valley · Alameda County | — | — |
| A L Construction Corp | Alan Lanh Dang | — | (510) 505 0643 | GC, remodel, ADU | Newark · Alameda County | — | — |
| A L Electric INC | Vergara Alejandro Lopez | — | (415) 350 5415 | Electricians | San Lorenzo · Alameda County | — | — |
| A M A Glass | A M A Glass | — | (510) 453 7030 | Windows, patio, painters | Emeryville · Alameda County | — | — |
| A M D General Construction INC | Michael Angelo Cook | — | (415) 374 1817 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| A M E Heating & Air Conditioning | Rafeeq Zakaa Muhammad | — | (510) 773 3133 | HVAC | Hayward · Alameda County | — | — |
| A M G Construction | William Harold Jr Mc Ferren | — | (510) 569 2365 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| A M Green Construction | Alfredo Mier Morales | — | (510) 478 2707 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| A M J Construction | Alberto Jr Mata | — | (510) 978 3948 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| A M Landscaping & Gardening Services | Muniz Herrera Alberto | — | (510) 355 5595 | Windows, patio, painters | Hayward · Alameda County | — | — |
| A M Roofing Services INC | Rangel Homero Mendoza Montejo | — | (510) 437 0062 | Other roofers | Oakland · Alameda County | — | — |
| A M S Proper Floors INC | Jose Mauricio Alba Garibay | — | (510) 825 1587 | Other | Hayward · Alameda County | — | — |
| A M Tree Service | Adrian Martinez Hernandez | — | (510) 862 9965 | Tree | Hayward · Alameda County | — | — |
| A M Z Electric | Zadoor Massis | — | (925) 216 8894 | Electricians | Livermore · Alameda County | — | — |
| A N E Construction | Mark David Zika | — | (209) 229 7560 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| A P C Construction | Alex Pui-kei Chiu | — | (510) 388 6015 | Electricians | Castro Valley · Alameda County | — | — |
| A P Concrete | A P Concrete | apcjohn24@gmail.com | (925) 449 6706 | Other | Livermore · Alameda County | — | — |
| A Perez Painting | A Perez Painting | — | (510) 334 9105 | Windows, patio, painters | Berkeley · Alameda County | — | — |
| A Quality Plumbing & Electric INC | Brian Thomas Johnson | — | (925) 449 0891 | Electricians | Livermore · Alameda County | — | — |
| A R P Hardscape INC | Paniagua Alejandro Ramirez | — | (925) 208 9916 | Other | San Leandro · Alameda County | — | — |
| A R Painting | A R Painting | — | (925) 382 2498 | Windows, patio, painters | Livermore · Alameda County | — | — |
| A R Roofing INC | Marco Antonio Ramirez | — | (510) 385 4258 | Other roofers | Oakland · Alameda County | — | — |