| Calvary Construction | Armando Jr Morales | — | (820) 465 6565 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| Calypso Heating & Air Conditioning INC | Christopher David Jackson | — | (805) 579 0080 | HVAC | Westlake Village · Ventura County | — | — |
| Cam Construction And Design INC | Christopher Allan Mc Donagh | — | (805) 701 4395 | GC, remodel, ADU | Ojai · Ventura County | — | — |
| Cam-j Electric | Carlos Armando Romero | — | (818) 456 9576 | Electricians | Simi Valley · Ventura County | — | — |
| Cam-tec Security | David Jay Bierend | — | (818) 522 9701 | Alarm and generators | Simi Valley · Ventura County | — | — |
| Camarillo Backflow | Kelle J Green | — | (805) 482 8963 | HVAC | Camarillo · Ventura County | — | — |
| Camarillo Electric - Braziel R Randall Contractor | Robert Randall Braziel | — | (805) 482 3012 | Electricians | Camarillo · Ventura County | — | — |
| Camarillo Glass INC | Anthony Ryan Bowman | — | (805) 444 9830 | Windows, patio, painters | Camarillo · Ventura County | — | — |
| Camarillo Pool Service | Isaiah Jacob Cervantes | info@camarillopoolservice.com | (805) 484 4001 | Pool | Camarillo · Ventura County | — | — |
| Camarillo Roofing Company | Brian Allen Wooley | — | (805) 402 7221 | Other roofers | Camarillo · Ventura County | — | — |
| Camarillo Rooter LLC | Ladislao Lonnie Jimenez | — | (805) 509 0552 | Other | Camarillo · Ventura County | — | — |
| Cameron Masonry INC | Wesley Barton Cameron | — | (805) 933 0700 | Other | Ventura · Ventura County | — | — |
| Cameron Webster Construction | James Cameron Webster | — | (805) 701 5050 | Electricians | Camarillo · Ventura County | — | — |
| Cami Networks INC | Humberto Jovan Borrayo | — | (805) 299 5955 | Other | Oxnard · Ventura County | — | — |
| Camloh LLC | Harry Allen Gordon | — | (818) 519 0264 | HVAC | Newbury Park · Ventura County | — | — |
| Campbell Construction Co | William Curtis Campbell | — | (661) 406 0343 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Campbell Construction INC | Philip Daniel Campbell | — | (805) 844 8755 | GC, remodel, ADU | Oak View · Ventura County | — | — |
| Campbell Plumbing And Rooter LLC | Alex Maxwell Campbell | — | (520) 313 0403 | Other | Simi Valley · Ventura County | — | — |
| Campbell Pool & Spa Service | Dale Bruce Campbell | — | (805) 415 3672 | Pool | Camarillo · Ventura County | — | — |
| Campos Heating & Air INC | Aldo Enrique Gomez Ramos | — | (747) 444 6198 | HVAC | Simi Valley · Ventura County | — | — |
| Canelas Construction INC | Canelas Rodriguez Eber | — | (818) 675 2346 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| Canfield And Sons Framing INC | Dale Burton Canfield | — | (805) 207 8344 | Other | Simi Valley · Ventura County | — | — |
| Cannizzaro Construction | Joseph Stewart Cannizzaro | — | (802) 522 0756 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Cannon Constructors South INC | John Arthur Locascio | — | (818) 906 6200 | GC, remodel, ADU | Westlake Village · Ventura County | — | — |
| Cano's Welding | Cano's Welding | — | (805) 795 1298 | Other | Santa Paula · Ventura County | — | — |
| Canos Landscaping | Fernando Alfredo Cano | info@canoslandscaping.com | (805) 607 6924 | Windows, patio, painters | Oxnard · Ventura County | — | — |
| Cantrell Aire INC | James Larry Cantrell | jim@cantrellaire.com | (818) 652 6700 | HVAC | Camarillo · Ventura County | — | — |
| Canyon Construction | Jeffrey William Howatt | — | (805) 585 8982 | GC, remodel, ADU | Ojai · Ventura County | — | — |
| Caop Construction | Kenneth Kyuge Williams | — | (805) 279 6402 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Capaldi Roofing INC | Robert Michael Capaldi | — | (805) 584 0602 | Other roofers | Simi Valley · Ventura County | — | — |
| Capital Plastering INC | Jon Carl Ekblad | — | (805) 499 1056 | Other | Thousand Oaks · Ventura County | — | — |
| Caravaggio Plumbing | Caravaggio Plumbing | — | (818) 885 1888 | Other | Simi Valley · Ventura County | — | — |
| Caravaggio Plumbing Services | Claudio Georgio Jr Caravaggio | — | (805) 587 5897 | Other | Simi Valley · Ventura County | — | — |
| Carbon Construction | Miguel Angel Coronel | — | (805) 832 2038 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| Carbone Painting Company INC | Christopher Thomas Carbone | — | (805) 530 1400 | Windows, patio, painters | Moorpark · Ventura County | — | — |
| Carl Shido | Carl Shido | — | (805) 404 8011 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Carl W Thomsen Construction | Carl Walter Thomsen | — | (805) 443 1843 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| Carl Yokoi | Carl Yokoi | — | (805) 377 9192 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| Carlito Construction Corporation | Manuel Carlito | — | (805) 428 5360 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Carlos Bernardino Deras | Carlos Bernardino Deras | — | (818) 326 1452 | Other | Simi Valley · Ventura County | — | — |