| 1 N 7 General Construction | Zhong Jinfan | — | (415) 370 9822 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| 10square Construction INC | Patrick Bai Lam | — | (510) 501 1827 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| 123 Garage Door | Ming Fang | — | (510) 604 8640 | GC, remodel, ADU | Castro Valley · Alameda County | — | — |
| 2 H | 2 H | — | (415) 606 0729 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| 20/20 Builders | Joel Norman Meltzer | — | (510) 531 0102 | GC, remodel, ADU | Emeryville · Alameda County | — | — |
| 2050 Innovation Construction | Demetrius Dwayne Esclovon | — | (510) 313 8556 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| 2Y Construction INC | Huh Youl | — | (510) 760 3023 | GC, remodel, ADU | Castro Valley · Alameda County | — | — |
| 3 D Construction INC | Joseph Elmer Kettle | — | (925) 519 8323 | GC, remodel, ADU | Dublin · Alameda County | — | — |
| 360 Property Solutions LLC | Clare Catherine Woakes | — | (510) 418 1430 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| 3D Remodeling & Construction | Brady Tingyang Yu | — | (510) 207 8694 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| 3D Remodeling INC | James Randall Kens Alexander | sales@3dremodeling.com | (925) 525-0708 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| 4 Craftsmen Construction INC | Michael Stanton Riter | — | (925) 245 8900 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| 4 Real Construction INC | Edward John Tallman | — | (510) 773 4490 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| 4 Wr Contracting | Horacio R Woolcott | info@wrcontracting.com | (510) 910 1911 | GC, remodel, ADU | Piedmont · Alameda County | — | — |
| 4C Construction Systems LLC | Yonah Aharon Naftaly | — | (650) 200 3182 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| 4sigma Home Development | Jawad Yousofi | — | (925) 525 5898 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| 5-year Plan LLC | Jose Estephano Heim | — | (415) 602 4837 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| 7X Construction | Xuan Quang Nguyen | — | (510) 860 6800 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| 9 Islands Construction INC | Gil Norberto Boim | interested@domainmarket.com | (510) 935 4858 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| A & A Remodelers | A & A Remodelers | — | (925) 964 3800 | GC, remodel, ADU | Pleasanton · Alameda County | — | — |
| A & B Construction | Michael Eugene Stephens | — | (510) 524 5254 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| A & E Emaar Company | Usama Mohamed El-Saied | — | (510) 253 5337 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| A & F Garage Doors And Construction | Fernando Duran Martinez | — | (510) 604 6040 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| A & G Construction | Zhao Gary | — | (415) 407 4279 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| A - 1 Property Construction | David Michael Perman | — | (925) 686 4663 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| A - Brother Construction | Asikia Pati | — | (650) 518 0617 | GC, remodel, ADU | Newark · Alameda County | — | — |
| A / Global General Contractor | A / Global General Contractor | — | (408) 991 3363 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| A 1 General Building | A 1 General Building | — | (510) 712 5854 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| A B C Construction | Luis Eduardo Alves | — | (510) 895 6200 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| A C Armstrong Construction | Arnold Calvin Armstrong | — | (510) 384 1062 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| A C Construction | Cimpoaie Aurel | — | (510) 303 4691 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| A Cut Above Construction | Kyle Daniel Plotz | — | (925) 784 5294 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| A D Melchner General Engineering | A D Melchner General Engineering | — | (415) 410 7831 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| A G & L Builders Corp | Steve Lujano | — | (408) 561 0854 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| A H Construction | Hernandez Duenas Agustin | sales@ahconstruction.com | (510) 631 9011 | GC, remodel, ADU | Oakland · 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 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 Construction Corp | Alan Lanh Dang | — | (510) 505 0643 | GC, remodel, ADU | Newark · Alameda County | — | — |