| Cc Tile | Cc Tile | — | (650) 267 1521 | Other | Pittsburg · Contra Costa County | — | — |
| Ccl Trees Services | Juan Manuel Gaspar De La Cruz | juangaspar@ccltrees.com | (925) 565 1554 | Tree | Oakley · Contra Costa County | — | — |
| Cctv-Contra Costa Television | Cctv-Contra Costa Television | — | (925) 313-1180 | Alarm and generators | Martinez · Contra Costa County | — | — |
| Cdm Sky Plumbing INC | Christopher Lenard Cooper | — | (925) 470 7307 | Other | Antioch · Contra Costa County | — | — |
| Ceap Construction INC | Ashtari Jolehkaran Behnam | — | (510) 396 4964 | GC, remodel, ADU | Danville · Contra Costa County | — | — |
| Cee Jay Industry | Connor James Granlund | — | (707) 646 9620 | Electricians | Pacheco · Contra Costa County | — | — |
| Ceja Tile | Ceja Tile | — | (925) 324 8313 | Other | Antioch · Contra Costa County | — | — |
| Celes Handy Man | Celes Handy Man | — | (925) 705 0933 | GC, remodel, ADU | Pittsburg · Contra Costa County | — | — |
| Cello Electric | Christopher Martin Canas | — | (925) 628 2301 | Electricians | Concord · Contra Costa County | — | — |
| Cemcon INC | David James Gutridge | — | (925) 427 1011 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| Cencal Electric | Romero-gutierrez Joaquin | — | (408) 310 5246 | Electricians | Richmond · Contra Costa County | — | — |
| Centennial Hardwood Floors | Centennial Hardwood Floors | — | (925) 580 5134 | Other | Brentwood · Contra Costa County | — | — |
| Central Alarm Service | Christopher Brian Lowe | — | (925) 552 0500 | Alarm and generators | Danville · Contra Costa County | — | — |
| Central Coast Construction INC DBA J & J Flooring | Jhonathan Davila Ortiz | — | (925) 497 0582 | Other | Oakley · Contra Costa County | — | — |
| Central Service Plumbing Company | Dino George Sr Waldren | — | (510) 799 7708 | Other | Crockett · Contra Costa County | — | — |
| Cepeda Construction | Andres Pablo Cepeda | — | (408) 420 6868 | GC, remodel, ADU | Lafayette · Contra Costa County | — | — |
| Cerletti & Kennedy Design - Build | Robert Louis Cerletti | — | (707) 580 1537 | GC, remodel, ADU | Walnut Creek · Contra Costa County | — | — |
| Certor Lath & Plaster | Certor Lath & Plaster | — | (925) 206 9292 | Other | Brentwood · Contra Costa County | — | — |
| Cervantes Builder INC | Antonio Cervantes | tony@cervantesbuilder.com | (415) 309 5069 | GC, remodel, ADU | Richmond · Contra Costa County | — | — |
| Cervantes Construction | Carlos Alberto Cervantes | — | (925) 435 7366 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| Ces-tech Heating And Cooling | Ces-tech Heating And Cooling | — | (925) 497 0276 | HVAC | Concord · Contra Costa County | — | — |
| Cesar Nicolas Gomez | Cesar Nicolas Gomez | — | (925) 864 7997 | GC, remodel, ADU | Bay Point · Contra Costa County | — | — |
| Cesar's Construction & Handyman Services INC | Cesar Vladimir Lopez | — | (650) 922 5535 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| Cez Electric And Maintenance | Aragon Cesar | — | (925) 759 0279 | Electricians | Antioch · Contra Costa County | — | — |
| Cezu Construction INC | Oscar Stiff Zuniga Jarillo | cezuconstruction@yahoo.com | (925) 202 3767 | GC, remodel, ADU | Brentwood · Contra Costa County | — | — |
| Cfc Builder | Cfc Builder | — | (925) 354 4584 | GC, remodel, ADU | Brentwood · Contra Costa County | — | — |
| Ch Builders INC | Hernandez Andres Campos | — | (415) 879 6894 | GC, remodel, ADU | San Pablo · Contra Costa County | — | — |
| Ch Roofing INC | Douglas Marvin Espland | — | (925) 798 1089 | Other roofers | Concord · Contra Costa County | — | — |
| Chad Michael Kiltz | Chad Michael Kiltz | — | (925) 766 5614 | GC, remodel, ADU | Alamo · Contra Costa County | — | — |
| Chad Reed Construction INC | Chad Blair Reed | — | (925) 963 3845 | GC, remodel, ADU | San Ramon · Contra Costa County | — | — |
| Chad Smith Construction Incorporated | Chad Ian Smith | — | (925) 566 8755 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| Chai Hardwood Floor | Chai Hardwood Floor | — | (510) 919 5442 | Other | San Pablo · Contra Costa County | — | — |
| Chairez Fencing | Chairez Barrios Alejandro | chairezfencing16@gmail.com | (925) 752 2348 | Other | Antioch · Contra Costa County | — | — |
| Chamberlux Automata INC | Chad Robert Krisher | — | (510) 239 7306 | Other | Pinole · Contra Costa County | — | — |
| Charles A Wall | Charles A Wall | — | (925) 932 7900 | GC, remodel, ADU | Walnut Creek · Contra Costa County | — | — |
| Charles Kansaku | Charles Kansaku | — | (925) 989 1187 | Windows, patio, painters | Antioch · Contra Costa County | — | — |
| Charles Kopp INC DBA Continental Electric | Robert Charles Kopp | — | (510) 772 3097 | Electricians | Pinole · Contra Costa County | — | — |
| Charles Mc Innis | Charles Mc Innis | — | (925) 817 0306 | GC, remodel, ADU | Walnut Creek · Contra Costa County | — | — |
| Charming Painting And Decorating | Charming Painting And Decorating | — | (925) 766 7228 | GC, remodel, ADU | Walnut Creek · Contra Costa County | — | — |
| Chase Rooter & Plumbing INC | Bergelson Olga | — | (925) 567 9000 | Other | Danville · Contra Costa County | — | — |