| Affordable Heating And Air Conditioning | Affordable Heating And Air Conditioning | — | (510) 825 5079 | HVAC | Castro Valley · Alameda County | — | — |
| Affordable Home Inspection Inc. | Affordable Home Inspection Inc. | — | (714) 847-7570 | Inspectors | Huntington Beach · Alameda County | — | — |
| Affordable Rain Gutters | Affordable Rain Gutters | — | (925) 895 5419 | Other | Livermore · Alameda County | — | — |
| Aflores Construction INC | Harbinder Singh | amadeo@floresconstruction.org | (408) 518 9955 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Afterglow Hydronic Heating | Mniska Able Lamb | — | (510) 485 0550 | HVAC | Berkeley · Alameda County | — | — |
| Ag Building Solutions Corp | Armando Gurrola | — | (786) 449 8874 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Ag Security Services INC | Denis Cooke | — | (800) 255 4273 | Electricians | Livermore · Alameda County | — | — |
| Agape Painting INC | David Young Choi | — | (510) 757 8880 | Windows, patio, painters | Hayward · Alameda County | — | — |
| Agd Roofing LLC | Oliveros David Lara | — | (510) 282 6628 | Other roofers | Oakland · Alameda County | — | — |
| Agf Roofing INC | Alvaro Gutierrez Fernandez | — | (510) 659 1058 | Other roofers | Fremont · Alameda County | — | — |
| Aglow Outdoor Lighting LLC | Da Silva Vinicius Lima | — | (925) 307 4324 | Other | Pleasanton · Alameda County | — | — |
| Agp Construction LLC | Norman Wayne Wilcoxson | — | (510) 390 0404 | GC, remodel, ADU | Pleasanton · Alameda County | — | — |
| Aguirre's Landscaping | Aguirre's Landscaping | — | (510) 921 0093 | Windows, patio, painters | San Leandro · Alameda County | — | — |
| Ahboltin Construction INC | Jeremy Charles Hacker | ahboltinconstruction@gmail.com | (925) 447 6289 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| Ahsolar Pro Solutions | Meo Van Nguyen | — | (510) 468 8535 | Electricians | Union City · Alameda County | — | — |
| Ai Precision Builders LLC | Ibarra Adrian | — | (510) 676 4586 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Aif Construction INC | Felix Aniceto Imperial | — | (510) 695 9584 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Air Concepts INC | Charles William Gjers | info@airconcepts.com | (408) 489 2465 | HVAC | Livermore · Alameda County | — | — |
| Air Excel INC | Hardeep Singh Lell | — | (510) 206 8576 | HVAC | Union City · Alameda County | — | — |
| Air Solutions LLC | Renan Montano Estores | — | (510) 573 6474 | HVAC | Livermore · Alameda County | — | — |
| Air Zone Mechanical | Air Zone Mechanical | — | (415) 377 0202 | HVAC | San Leandro · Alameda County | — | — |
| Aircal Heating | Ralph Fernandes Neves | — | (510) 715 8490 | HVAC | Fremont · Alameda County | — | — |
| Airice HVAC Services | Danny Joe Rice | — | (510) 304 5122 | HVAC | Fremont · Alameda County | — | — |
| Airstars Corp | Rafael Fernando Barrios Marroquin | — | (510) 999 1656 | HVAC | Hayward · Alameda County | — | — |
| Airteks.com INC | Jerome Bernard Iii Bohland | — | (925) 292 0148 | HVAC | Livermore · Alameda County | — | — |
| Ais Heating & Air Conditioning INC | Asmir Sojkic | — | (510) 792 4328 | HVAC | Livermore · Alameda County | — | — |
| Ais Heating And Air Conditioning | Asmir Sojkic | — | (510) 792 4328 | HVAC | Livermore · Alameda County | — | — |
| Aj Framing | Aj Framing | — | (510) 816 7607 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| Ajang Salkhi | Ajang Salkhi | — | (415) 601 6130 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| Ajitco Electric & Const Co | Kamaljit Singh Assi | — | (510) 742 1704 | Electricians | Newark · Alameda County | — | — |
| Akira Landscaping | Akira Landscaping | — | (510) 813 4247 | Windows, patio, painters | Castro Valley · Alameda County | — | — |
| Akom Construction INC | Swaran Singh | — | (510) 207 2200 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Al Nelson Construction INC | Alfred Kent Nelson | — | (510) 508 2187 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Alameda Ca Pest | Alameda Ca Pest | — | (510) 391-3032 | Pest, tile roofs | Alameda · Alameda County | — | — |
| Alameda Concrete | Alameda Concrete | — | (510) 692 8955 | Other | Oakland · Alameda County | — | — |
| Alameda County Vector Control Services District | Alameda County Vector Control Services District | — | (510) 567-6800 | Pest, tile roofs | Alameda · Alameda County | — | — |
| Alameda Electrical Distributors | Alameda Electrical Distributors | — | (510) 786-1400 | Electricians | Hayward · Alameda County | — | — |
| Alameda Electrical Distributors Inc. Alameda Electric | Alameda Electrical Distributors Inc. Alameda Electric | — | (510) 523-6933 | Electricians | Alameda · Alameda County | — | — |
| Alameda Engineering | Alameda Engineering | — | (510) 537 6550 | Other | Castro Valley · Alameda County | — | — |
| Alameda Hardwood Floors | Alameda Hardwood Floors | — | (650) 491 4436 | Other | San Leandro · Alameda County | — | — |