| Carrillo Plumbing | Carrillo Plumbing | — | (707) 474 2456 | Other | Vacaville · Solano County | — | — |
| Carter Drilling | Ricky Dwan Carter | — | (916) 777 7014 | Other | Rio Vista · Solano County | — | — |
| Carter's Construction Co | Juarinton Destephano Carter | — | (510) 682 5874 | GC, remodel, ADU | Benicia · Solano County | — | — |
| Carter's Devco LLC | Juarinton Destephano Carter | — | (510) 682 5874 | GC, remodel, ADU | Benicia · Solano County | — | — |
| Caruso Plumbing And Drain | Caruso Plumbing And Drain | — | (650) 669 0154 | Other | Vallejo · Solano County | — | — |
| Casa Audio Video Solutions | Casa Audio Video Solutions | casaaudiovideosolutions@gmail.com | (415) 847 8242 | Other | Fairfield · Solano County | — | — |
| Casanova Construction | Sergio A Casanova | — | (707) 332 8231 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Cascade Pest Systems | Cascade Pest Systems | office@cascadepestsystems.com | (707) 446 7760 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| Castillo Painting | Castillo Painting | — | (925) 436 0375 | Windows, patio, painters | Vallejo · Solano County | — | — |
| Caza General Construction LLC | Bautista Garcia Alfonso | office@cazageneralconstruction.com | (650) 315 6580 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| Cedar Construction Management INC | Antranik Dikran Kaychian | — | (650) 576 4248 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| Celinsulation Corporation | Cesar Enrique Sr Lara | — | (707) 688 9888 | Other | Benicia · Solano County | — | — |
| Centenario Countertops Services INC | Aguilar Fernando Salmeron | — | (707) 745 3302 | Other | Fairfield · Solano County | — | — |
| Century Electric | Arnold Espino Dizon | — | (415) 861-6522 | Electricians | Vallejo · Solano County | — | — |
| Century Landscaping INC | Sergio Barba Gutierrez | — | (707) 332 9227 | Windows, patio, painters | Vallejo · Solano County | — | — |
| Cereda's Custom Cabinets | Cereda's Custom Cabinets | — | (707) 333 7847 | Other | Fairfield · Solano County | — | — |
| Certapro Painters Of Fairfield | Certapro Painters Of Fairfield | mberliner@certapro.com | (203) 869-0122 | Windows, patio, painters | Fairfield · Solano County | — | — |
| Certified Coatings Company | Steven Timothy Edgar | — | (707) 639 4414 | Windows, patio, painters | Fairfield · Solano County | — | — |
| Certified Comfort Heating & Air Conditioning Service | Steven Warren Haynes | — | (707) 446 3080 | HVAC | Vacaville · Solano County | — | — |
| Ces Integrated Corporation | Vincent John Nicholas | service@cesintegrated.com | (707) 759 6043 | HVAC | Fairfield · Solano County | — | — |
| Cesar Cadavid | Cesar Cadavid | — | (707) 333 2618 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Cevizdere LLC | Muzaffer Mete Dalan | — | (925) 482 0657 | Electricians | Benicia · Solano County | — | — |
| Cha Group INC | Matthew Carrol Holman | — | (707) 761 7762 | Other | Vacaville · Solano County | — | — |
| Chalmers Construction | Randy William Chalmers | — | (707) 853 0655 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| Chamberlain Construction | Michael Rodman Chamberlain | — | (510) 384 5868 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Charged Electrical | Donshae Trevon Robinson | jamie@charged-electrical.com | (707) 497 0768 | Electricians | Vallejo · Solano County | — | — |
| Charles Custom Painting | Charles Custom Painting | — | (707) 449 1664 | Windows, patio, painters | Vacaville · Solano County | — | — |
| Chastain Electric INC | Joe Frank Chastain | — | (707) 678 2046 | Electricians | Dixon · Solano County | — | — |
| Chb Construction Clean-up Co Site Support | Charles Howlett Iii Barnard | — | (707) 474 2240 | Other | Vacaville · Solano County | — | — |
| Cheapo Plumber | Cheapo Plumber | — | (707) 656 5327 | Other | Fairfield · Solano County | — | — |
| Checkmate Mechanical LLC | Scott Thomas Nelson | — | (707) 656 3683 | HVAC | Vallejo · Solano County | — | — |
| Chelu Construction INC | Edward Robert Blakeley | estimate@cheluconstruction.com | (714) 760 2638 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Chendo & Son's Construction | Mike Roderick Calderon Martinez | — | (415) 532 6029 | GC, remodel, ADU | Benicia · Solano County | — | — |
| Cherry Glen Construction | Curtis Dean Rodrigues | — | (707) 365 0875 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| Chicovsky Painting Maintenance | Chicovsky Painting Maintenance | — | (707) 317 3951 | Windows, patio, painters | Vacaville · Solano County | — | — |
| Chieftain Industrial Professionals INC | Lance Dean Perdue | — | (707) 435 8082 | Electricians | Fairfield · Solano County | — | — |
| Chilo's G Construction | Isidro Arguello Farias | — | (707) 319 5304 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Chofa Construction | Steve Stephan Marin | — | (707) 592 0607 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| Chombo's Custom Construction INC | Dayvid Chombo | — | (707) 803 8661 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| Choudhery Corporation | Mubasher Tariq Choudhery | — | (858) 224 8524 | GC, remodel, ADU | Vacaville · Solano County | — | — |