| Cazden Electric | John David Cazden | — | (510) 676 6659 | Electricians | Berkeley · Alameda County | — | — |
| Cc Commercial Coatings INC | Ronald Eugene Emory | — | (510) 785 5600 | Windows, patio, painters | Hayward · Alameda County | — | — |
| Cc Construction | Christina Ann Cardenas | — | (209) 665 1167 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Cccm Construction LLC | Jeremy Ryan Musson | — | (510) 760 3155 | GC, remodel, ADU | Dublin · Alameda County | — | — |
| Ccs | Ryan Moore Gleason | — | (888) 807 7459 | Electricians | Livermore · Alameda County | — | — |
| Cdm Roofing | Caleb Duran Mendoza | — | (510) 826 7652 | Other roofers | Hayward · Alameda County | — | — |
| Ce Apex Construction INC | Antheia Yin Yin Li | — | (415) 823 6813 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Cec - Shimmick Joint Venture | Engineering Contractors INC California | — | (925) 461 1500 | Electricians | Pleasanton · Alameda County | — | — |
| Cec-disney Joint Venture | Engineering Contractors INC California | — | (925) 461 1500 | GC, remodel, ADU | Pleasanton · Alameda County | — | — |
| Cec-golden State Jv | Engineering Contractors INC California | — | (925) 461 1500 | Other | Pleasanton · Alameda County | — | — |
| Cecelia Littlepage Landscape Co | Cecelia Fairchild Littlepage | cecelittlepage@gmail.com | (510) 848 4178 | Windows, patio, painters | Berkeley · Alameda County | — | — |
| Cedar Builders INC | Mike Simon Tanios | — | (510) 299 4001 | HVAC | Hayward · Alameda County | — | — |
| Cedar Building & Construction Management | Joseph Elias Tanios | — | (510) 599 6436 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Cedar Tree Service LLC | Gerardo Roque Madrigal | — | (925) 339 9447 | Other | Livermore · Alameda County | — | — |
| Ceglio Concrete | Ceglio Concrete | ceglioconcrete@gmail.com | (925) 344 9047 | Other | Livermore · Alameda County | — | — |
| Celestial Concrete LLC | Nikolas Elijah Mendoza | — | (341) 786 1918 | Other | Hayward · Alameda County | — | — |
| Celis Construction | Navarro Raul Celis | celisconstruction@gmail.com | (510) 314 0122 | GC, remodel, ADU | Castro Valley · Alameda County | — | — |
| Cell Contracting Services | Mohammad Javad Eibagi | — | (925) 922 7190 | Electricians | Pleasanton · Alameda County | — | — |
| Celtic Pool Service | Ruairi Michael O Ceallaigh | — | (925) 765 5987 | Pool | Oakland · Alameda County | — | — |
| Ceniza Glass Studio LLC | Greer Mckinley Ashman | — | (415) 649 1785 | Windows, patio, painters | Oakland · Alameda County | — | — |
| Centeno Cabinets LLC | Jonathan De Jesus Guzman Ramirez | — | (510) 689 4070 | Other | Oakland · Alameda County | — | — |
| Center Line Construction | Cameron Hossein Lavassani | — | (925) 640 8619 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| Centerville Management Group INC | Thomas William Mc Coy | — | (510) 286 8203 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Central Bay Roofing & Restoration INC | William Robert Brown | info@centralbayroofing.com | (510) 521 7334 | Other roofers | Alameda · Alameda County | — | — |
| Central Boilers And Heating | Edwin Stanley Barahona | — | (510) 381 8705 | HVAC | San Leandro · Alameda County | — | — |
| Central Fire Services INC | Sullivan Leon | — | (408) 854 0320 | Other | Pleasanton · Alameda County | — | — |
| Central Glass Industries INC | Chad Donald Francis | — | (510) 797 3890 | Windows, patio, painters | Newark · Alameda County | — | — |
| Central Heating & Air Conditioning | Central Heating & Air Conditioning | — | (510) 299 7250 | HVAC | Livermore · Alameda County | — | — |
| Central Maintenance | Central Maintenance | — | (510) 501 3835 | Other | Union City · Alameda County | — | — |
| Central O Plumbing | Central O Plumbing | — | (510) 980 0971 | Other | Hayward · Alameda County | — | — |
| Centrified Security Solutions INC | Branden James Bell | — | (925) 245 1213 | Alarm and generators | San Leandro · Alameda County | — | — |
| Centro A Construction INC | Jorge Stuardo Solis | — | (510) 999 2043 | GC, remodel, ADU | Union City · Alameda County | — | — |
| Century Carpet INC | Young El Chey | — | (510) 886 7555 | Other | Hayward · Alameda County | — | — |
| Century Hardwood Floors | Century Hardwood Floors | — | (510) 828 4931 | Other | Castro Valley · Alameda County | — | — |
| Century Roof And Solar INC | Darrell Anthony Diaz | — | (510) 780 9489 | Other roofers | Hayward · Alameda County | — | — |
| Cer Unit Construction INC | Dazhi Wong | — | (510) 213 4023 | Electricians | Alameda · Alameda County | — | — |
| Cerami Builders INC | Shizen Nakamura | — | (510) 954 6760 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Cerda-zein Real Estate INC | Jose Cerda-Zein | — | (510) 523 5673 | GC, remodel, ADU | Alameda · Alameda County | — | — |
| Certa Engineering | Certa Engineering | — | (510) 470 1002 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Certapro Painters | Soumil Amin | — | (510) 981 0321 | Windows, patio, painters | Oakland · Alameda County | — | — |