| Chau's Construction | Chau Steven | — | (415) 269 1338 | GC, remodel, ADU | Pleasant Hill · Contra Costa County | — | — |
| Chavez Roofing | Jesus Chavez Gomes | — | (925) 348 6467 | Other roofers | Brentwood · Contra Costa County | — | — |
| Checkered Flag Flooring | Checkered Flag Flooring | — | (925) 584 8312 | Other | Byron · Contra Costa County | — | — |
| Cherif Kaci | Cherif Kaci | — | (510) 426 8899 | Other | El Cerrito · Contra Costa County | — | — |
| Cherokee Const | Cherokee Const | — | (510) 621 8324 | GC, remodel, ADU | Richmond · Contra Costa County | — | — |
| Cherry Grove Landscape LLC | Jose Pablo Velasco | josev@cherrygrovelandscape.com | (707) 681-5776 | Windows, patio, painters | Bay Point · Contra Costa County | — | — |
| Chill Heating And Cooling | Igor Kudinov | — | (925) 856 5606 | HVAC | San Ramon · Contra Costa County | — | — |
| Chin Construction | William K Chin | — | (415) 948 8636 | GC, remodel, ADU | Walnut Creek · Contra Costa County | — | — |
| Chinchilla Electric | Marvin Ramiro Chinchilla | — | (510) 776 9948 | Electricians | Richmond · Contra Costa County | — | — |
| Chipman Relocation & Logistics | Jacob Thomas Moreno | — | (408) 420 7566 | Other | San Ramon · Contra Costa County | — | — |
| Chris Carper | Chris Carper | — | (925) 276 3376 | Windows, patio, painters | Concord · Contra Costa County | — | — |
| Chris Cressler Design Build | Chris Cressler Design Build | — | (510) 689 9519 | GC, remodel, ADU | Crockett · Contra Costa County | — | — |
| Chris D Soukoulis DBA Cds | Chris D Soukoulis DBA Cds | — | (925) 550 5028 | GC, remodel, ADU | Walnut Creek · Contra Costa County | — | — |
| Chris Dalikas INC | Chris Costa Dalikas | — | (925) 683 4616 | GC, remodel, ADU | Danville · Contra Costa County | — | — |
| Chris Fortner Construction INC | Chris Wayne Fortner | — | (510) 222 2151 | GC, remodel, ADU | Oakley · Contra Costa County | — | — |
| Chris Kiefer Construction | Christopher Thomas Kiefer | — | (510) 912 8800 | GC, remodel, ADU | El Sobrante · Contra Costa County | — | — |
| Chris Pugliesi Construction INC | Christopher Anthony Pugliesi | — | (510) 758 6608 | GC, remodel, ADU | El Sobrante · Contra Costa County | — | — |
| Chris S Mast Company | Christopher Scott Mast | — | (510) 502 0449 | Other | El Cerrito · Contra Costa County | — | — |
| Chris Ward Construction | Christopher Evans Ward | — | (510) 418 2548 | GC, remodel, ADU | El Cerrito · Contra Costa County | — | — |
| Christensen Brothers Construction - Lafayette Ca Remodeling | Christensen Brothers Construction - Lafayette Ca Remodeling | — | (510) 750-2655 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| Christensen Brothers Construction Company | Joshua Lamar Christensen | — | (925) 566 8771 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| Christian HVAC | Christian HVAC | — | (925) 695 4074 | HVAC | Clayton · Contra Costa County | — | — |
| Christiansen Construction | Craig Douglas Christiansen | — | (650) 276 8336 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| Christopher John Rodgers | Christopher John Rodgers | — | (925) 690 8216 | Electricians | Concord · Contra Costa County | — | — |
| Christopher R Schaeffer | Christopher R Schaeffer | — | (925) 360 8479 | Other | Walnut Creek · Contra Costa County | — | — |
| Christopher Stewart | Christopher Stewart | — | (925) 685 2200 | Windows, patio, painters | Bay Point · Contra Costa County | — | — |
| Christopher T Ruggieri | Christopher T Ruggieri | — | (925) 948 5118 | GC, remodel, ADU | Danville · Contra Costa County | — | — |
| Christopher Wade Paulsen | Christopher Wade Paulsen | — | (925) 766 7582 | GC, remodel, ADU | Orinda · Contra Costa County | — | — |
| Christy Plumbing | Christy Plumbing | — | (925) 776 4835 | HVAC | Discovery Bay · Contra Costa County | — | — |
| Chuck Healer | Chuck Healer | — | (925) 625 5516 | GC, remodel, ADU | Oakley · Contra Costa County | — | — |
| Chui's Construction | Jason K Chui | — | (925) 785 8128 | GC, remodel, ADU | San Ramon · Contra Costa County | — | — |
| Chula Vista Landscape | Chula Vista Landscape | mail@johndoe.com | (925) 325 9844 | Windows, patio, painters | Oakley · Contra Costa County | — | — |
| Chz Drywall | Chz Drywall | — | (925) 642 7059 | Other | Oakley · Contra Costa County | — | — |
| Cicarelli Contractors INC | Peter Brandon Jones | — | (650) 404 7049 | GC, remodel, ADU | Richmond · Contra Costa County | — | — |
| Ciccarello Electric | Vincent Raymond Ciccarello | — | (925) 783 5095 | Electricians | Oakley · Contra Costa County | — | — |
| Cinema Installation & Services INC | Claudio Andres Poblette | — | (925) 895 2386 | Other | San Ramon · Contra Costa County | — | — |
| Cirta Electric | Si Tahar Younes | — | (415) 967 8167 | Electricians | Hercules · Contra Costa County | — | — |
| Cis Carpet And Floors INC | Arriaga Eugene | — | (925) 766 1209 | Other | Antioch · Contra Costa County | — | — |
| Citadel Glass INC | Emon Jerome Nahidi | adams.birney@gmail.com | (415) 320 5644 | Windows, patio, painters | Hercules · Contra Costa County | — | — |
| Citrine Landscape Company | Phillip Dinh Vu | — | (925) 335 6819 | Windows, patio, painters | Discovery Bay · Contra Costa County | — | — |