| Adapt Dwellings INC | Steven Micah Edrington | — | (510) 749 4880 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Adatto Security + Communications DBA Fremont Alarm | Fremont Alarm | — | (510) 576 7099 | Electricians | Fremont · Alameda County | — | — |
| Add Color Painting Corp | Acevedo Victor Benavides | — | (510) 750 9410 | Windows, patio, painters | San Leandro · Alameda County | — | — |
| Adel Alami | Adel Alami | — | (925) 209 1919 | GC, remodel, ADU | Pleasanton · Alameda County | — | — |
| Adept Electrical Solutions | Donte Cory Almond | info@adeptelectricalsolutions.com | (510) 512 8029 | Electricians | Fremont · Alameda County | — | — |
| Adithya Construction INC | Venu Kumar Goud Dorapally | — | (925) 905 6900 | GC, remodel, ADU | Dublin · Alameda County | — | — |
| Admirals Cove | Admirals Cove | — | (510) 692-4898 | Windows, patio, painters | Alameda · Alameda County | — | — |
| Adobe Soil & Structures Engineering Contractors INC | Mark Assis Almeida | — | (510) 654 2600 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Adolinda | Carlos Castaneda Guevara | — | (510) 499 4620 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Adrian Gomez Roofing LLC | Gomez Adrian | hello@rfuenzalida.com | (510) 780 6432 | Other roofers | Castro Valley · Alameda County | — | — |
| Adrian Mendoza Roofing INC | Adrian Gerardo Mendoza | — | (510) 415 6390 | Other roofers | Hayward · Alameda County | — | — |
| Adrr Tiles Company INC | Jose Octavio Ramirez | — | (510) 585 7498 | Other | Newark · Alameda County | — | — |
| Ads Painting | Ads Painting | — | (510) 290 9715 | Windows, patio, painters | San Leandro · Alameda County | — | — |
| Adu Builders Group | Antolin Corona | — | (408) 819 1991 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Advance Construction | Ghanivand Michael | — | (510) 301 5547 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Advance Construction Services INC | Marnie Lyn Kamerdula | — | (925) 321 6192 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| Advance Construction Technology LLC | Robert Matthew Rosenberg | — | (510) 876 8451 | Other roofers | Fremont · Alameda County | — | — |
| Advance Heating And Air Conditioning | Advance Heating And Air Conditioning | — | (408) 593 5564 | HVAC | Newark · Alameda County | — | — |
| Advance Heating And Cooling Works | Advance Heating And Cooling Works | — | (510) 776 4372 | HVAC | Hayward · Alameda County | — | — |
| Advanced Air Leak Detection Services INC | James Jordan Morgan | — | (925) 667 1155 | Other | Livermore · Alameda County | — | — |
| Advanced Building Services INC | Jerome Victor Lenoir | — | (510) 763 6933 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Advanced Doorways | Donald William Jr Matto | advanceddoorways@aol.com | (925) 960 1622 | Other | Livermore · Alameda County | — | — |
| Advanced Fire Solutions INC | Andrew David Miranda | — | (510) 789 6909 | Other | Fremont · Alameda County | — | — |
| Advanced Home Energy INC | Thomas Gamburg | — | (510) 540 4860 | HVAC | Berkeley · Alameda County | — | — |
| Advanced Installation Services INC | Ross James Woolley | — | (510) 441 6201 | GC, remodel, ADU | Union City · Alameda County | — | — |
| Advanced Lighting Services INC | Bruce David Taylor | admin@advancedlightingservices.com | (925) 829 7801 | Electricians | Dublin · Alameda County | — | — |
| Advanced One Low Voltage | Matthew Ryan Minnihan | — | (510) 654 8300 | Other | Oakland · Alameda County | — | — |
| Advanced Painting | Advanced Painting | — | (510) 575 3401 | Windows, patio, painters | Oakland · Alameda County | — | — |
| Advanced Painting Systems | Advanced Painting Systems | contact@mysite.com | (510) 484 5133 | Windows, patio, painters | Castro Valley · Alameda County | — | — |
| Advanced Pure Water Systems | Awni Khaled Rasheed | — | (408) 489 3220 | Other | Union City · Alameda County | — | — |
| Advanced Refrigeration | Advanced Refrigeration | — | (510) 415 7982 | HVAC | Oakland · Alameda County | — | — |
| Advanced Roofing Services INC | David Michale Lopez | — | (510) 522 2565 | Other roofers | Alameda · Alameda County | — | — |
| Advanced Tile Restoration | David Loraine Jr Rhodes | — | (925) 474 2334 | Restoration | Dublin · Alameda County | — | — |
| Advanced Water Products | Adli Khalid Rasheed | — | (510) 979 9590 | Other | Livermore · Alameda County | — | — |
| Advantage Concrete | Advantage Concrete | — | (650) 201 6446 | Other | Oakland · Alameda County | — | — |
| Ae Paving | Ae Paving | — | (510) 697 0266 | Other | Hayward · Alameda County | — | — |
| Aeco Systems INC | James Patrick Millerick | — | (510) 342 0008 | Electricians | Hayward · Alameda County | — | — |
| Aesthetic Elements Construction | Ifeoma Mbanugo Adams | a.ruiz@aestheticelementsconstruction.com | (510) 219 3218 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Afb Construction INC | Anthony Dominic Porciuncula | — | (925) 525 9040 | GC, remodel, ADU | Dublin · Alameda County | — | — |
| Affordable Construction | Toan Van Pham | — | (510) 381 2800 | Electricians | San Leandro · Alameda County | — | — |