| Carin Painting INC | Oscar Arnulfo Corona Ceja | — | (510) 798 6930 | Windows, patio, painters | Oakland · Alameda County | — | — |
| Carlen And Company INC | Nicholas Adam Silberman | — | (415) 310 9044 | GC, remodel, ADU | Emeryville · Alameda County | — | — |
| Carlos & Brothers | Carlos & Brothers | — | (510) 461 5042 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Carlos Ramirez Construction | Carlos Augusto Ramirez | — | (510) 368 4715 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Carlos Sturla Painting | Carlos Sturla Painting | — | (925) 683 4328 | Windows, patio, painters | Dublin · Alameda County | — | — |
| Carloss Construction | Jacob Scott Carloss | — | (510) 648 1171 | GC, remodel, ADU | Newark · Alameda County | — | — |
| Carlsbad City Interior Remodelers | Carlsbad City Interior Remodelers | — | (760) 649-9535 | Restoration | Carlsbad · Alameda County | — | — |
| Carmel Construction Company | Rusu Carmel | — | (510) 867 7094 | GC, remodel, ADU | Castro Valley · Alameda County | — | — |
| Caro Master Builders INC | Caro Ismael | — | (510) 290 5920 | Electricians | Oakland · Alameda County | — | — |
| Carolyn A Adams | Carolyn A Adams | — | (925) 640 0638 | GC, remodel, ADU | Dublin · Alameda County | — | — |
| Carpentry Incorporated | Miguel Rosales-Gomez | — | (408) 769 8490 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Carpetland | Sam Salaheldin Hassan | — | (925) 455 7200 | Other | Livermore · Alameda County | — | — |
| Carr Custom Builders INC | Thomas Carr Parenteau | carrcustombuilders@gmail.com | (707) 592 4319 | GC, remodel, ADU | Albany · Alameda County | — | — |
| Carreto Electric | Vasny Smarth Carreto | — | (415) 994 0706 | Electricians | Alameda · Alameda County | — | — |
| Carroll Construction | Thomas Everett Carroll | — | (510) 523 1968 | GC, remodel, ADU | Alameda · Alameda County | — | — |
| Cartelli Painting & Waterproofing INC | Alkanli Aslan | — | (510) 527 4707 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Carter's Heating & Air | Carter's Heating & Air | — | (510) 755 7197 | HVAC | Oakland · Alameda County | — | — |
| Cas Financial & Construction Group INC | Cannon Edward | — | (510) 586 6474 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Casa De Rj | Casa De Rj | hello@casaderj.com | (510) 590 6291 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Casa Deluxe Construction | Zhao Xinjing | — | (510) 688 1488 | GC, remodel, ADU | Newark · Alameda County | — | — |
| Case Construction | Steven Christopher Case | — | (510) 907 1717 | GC, remodel, ADU | Alameda · Alameda County | — | — |
| Casillas Construction | Efren Diaz Casillas | — | (510) 258 7506 | GC, remodel, ADU | Newark · Alameda County | — | — |
| Cassie Thi Batilo | Cassie Thi Batilo | — | (650) 504 1437 | Other | Hayward · Alameda County | — | — |
| Castaneda Construction | Luciano Jesus Castaneda | — | (925) 323 8599 | GC, remodel, ADU | Pleasanton · Alameda County | — | — |
| Castellanos Construction And Landscape | Carlos Alberto Castellanos | — | (510) 757 4988 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Castillo Bay Builders LLC | Misael Castillo | info@castillobaybuilders.com | (510) 480 7574 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Castillo Electric | Jose Adan Rodriguez Castillo | interested@domainmarket.com | (510) 866 4043 | Electricians | San Leandro · Alameda County | — | — |
| Castillo Tree Service INC | Juan Gabriel Vazquez Castillo | — | (510) 792 6590 | Tree | Hayward · Alameda County | — | — |
| Castillo's Concrete | Castillo's Concrete | jess@castilloconstructionco.com | (510) 878 8670 | Other | San Leandro · Alameda County | — | — |
| Castillon Company | Eric Castillon | — | (510) 833 0121 | Other | Oakland · Alameda County | — | — |
| Castro Valley Electrical INC | Michael Angelo Saia | — | (510) 881 0291 | Electricians | Castro Valley · Alameda County | — | — |
| Caswell Ironworks | Donaciano Daniel Caswell | — | (415) 850 1332 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Catalyst Environmental INC | Reyes Joseph Villanueva | — | (650) 642 5714 | Other | Hayward · Alameda County | — | — |
| Catawba General Contracting | Norman Wayne Wilcoxson | — | (510) 390 0404 | GC, remodel, ADU | Pleasanton · Alameda County | — | — |
| Catellus Development Corporation | William Joseph Kennedy | — | (510) 267 3400 | GC, remodel, ADU | Emeryville · Alameda County | — | — |
| Catellus Real Estate Development L.p. | William Joseph Kennedy | — | (510) 267 3400 | GC, remodel, ADU | Emeryville · Alameda County | — | — |
| Catena Construction INC | Abraham Jamal Ahmed | — | (510) 575 1783 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Cathper INC | Chunyan Dong | — | (510) 759 6780 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Cato's Paving | Alfonso Carlos Villanueva | office@catospaving.com | (510) 397 2677 | Other | Hayward · Alameda County | — | — |
| Caval Construction | Jonathan R Castellanos | — | (917) 488 7853 | GC, remodel, ADU | Oakland · Alameda County | — | — |