| Calek Construction | Calek Wieslaw | — | (805) 500 8888 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Calgrid Construction | Evan William Wade | — | (805) 630 2278 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Cali-coast Plumbing & Rooter | Cali-coast Plumbing & Rooter | — | (805) 205 0354 | Other | Oxnard · Ventura County | — | — |
| Cali-u S A Acoustics INC | Diego Velasquez | — | (805) 376 9300 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Caliber Contractors | Steven Wesley Van Der Linden | — | (805) 304 3035 | Windows, patio, painters | Ventura · Ventura County | — | — |
| Calicool HVAC | Efren Martinez Anguiano | — | (818) 399 3766 | HVAC | Simi Valley · Ventura County | — | — |
| California Coast Low Voltage Controls | California Coast Low Voltage Controls | — | (805) 794 6510 | Other | Ventura · Ventura County | — | — |
| California Commercial Roofing Systems | Toni Rene'| Hoskins Toni Rene' Weaver | — | (805) 644 1640 | Other roofers | Ventura · Ventura County | — | — |
| California Construction Usa INC | Jeff Ryan Osborn | — | (805) 218 3661 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| California Contractor Pros | James Arthur Beltran | — | (424) 466 1800 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| California Custom Builders | California Custom Builders | — | (805) 667 7102 | Electricians | Ventura · Ventura County | — | — |
| California Designers Choice Custom Cabinetry INC | Mark William| Mulchay Mark William John Mulchay | — | (805) 987 1080 | Other | Camarillo · Ventura County | — | — |
| California Electric Company | David Brian Todd | hello@california-electric.com | (805) 794 3213 | Electricians | Ojai · Ventura County | — | — |
| California Fence | California Fence | info@californiaoutdoorfence.com | (805) 581 1113 | Other | Simi Valley · Ventura County | — | — |
| California Floor Covering | California Floor Covering | — | (818) 298 9669 | Other | Simi Valley · Ventura County | — | — |
| California Homes | California Homes | — | (805) 630 0848 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| California Industries INC | Linda Ann Schmidt | info@california-industries.com | (805) 643 8900 | Tree | Ventura · Ventura County | — | — |
| California Integrated Audio Video | California Integrated Audio Video | — | (805) 358 3400 | Other | Thousand Oaks · Ventura County | — | — |
| California Land Care INC | Hector Guzman Quintero | fgomez@californialandcare.com | (805) 524 2614 | Windows, patio, painters | Fillmore · Ventura County | — | — |
| California Land Clearing INC | Linda Ann Schmidt | — | (805) 643 8900 | Tree | Ventura · Ventura County | — | — |
| California Native Landscape | California Native Landscape | — | (805) 217 5572 | Windows, patio, painters | Thousand Oaks · Ventura County | — | — |
| California Network Cabling LLC | Jacob Colin Wiederspan | — | (805) 587 0382 | Other | Ventura · Ventura County | — | — |
| California Oaks Property Management | California Oaks Property Management | — | (805) 648-1851 | Property managers | Ventura · Ventura County | — | — |
| California Painting Pros INC | David Michael Engleman | — | (818) 456 9170 | Windows, patio, painters | Simi Valley · Ventura County | — | — |
| California Pool Service Specialists | Elise Merrick | — | (818) 522 1923 | Pool | Simi Valley · Ventura County | — | — |
| California Pools Of Santa Barbara/ventura | California Pools Of Santa Barbara/ventura | — | (805) 292-1989 | Pool | Ventura · Ventura County | — | — |
| California Rocks & Waterfalls Landscape | California Rocks & Waterfalls Landscape | — | (805) 732 2576 | Windows, patio, painters | Oxnard · Ventura County | — | — |
| California Roof Renewal | Karl Edmund Hawkins | — | (805) 787 3639 | Other roofers | Camarillo · Ventura County | — | — |
| California Security Concepts | California Security Concepts | — | (805) 338 8897 | Electricians | Thousand Oaks · Ventura County | — | — |
| California Sheet Metal Customs | Juan Carlos Chavez | — | (805) 298 6120 | Other roofers | Ventura · Ventura County | — | — |
| California Stoneworks | California Stoneworks | — | (805) 231 4649 | Other | Simi Valley · Ventura County | — | — |
| California Synthetic Lawns | Mitchell Allan Katz | — | (844) 600 8873 | Windows, patio, painters | Camarillo · Ventura County | — | — |
| California West Construction | Kenneth Wayne Cox | — | (805) 512 1887 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| California Woodworking INC | Luke Vickery | info@calwoodinc.com | (805) 982 9090 | Other | Oxnard · Ventura County | — | — |
| California's Construction INC | Karim Gorbanov | — | (805) 212 6833 | GC, remodel, ADU | Santa Paula · Ventura County | — | — |
| Call Oscar Tree Service | Acosta Oscar Delgado | calloscars@yahoo.com | (805) 646 7934 | Tree | Ojai · Ventura County | — | — |
| Callahan Remodeling & Construction INC | Mohammed Aref Jamal Abedi | — | (818) 835 7222 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Callender's House Of Glass INC | Brenda Ellen Brueckner | — | (805) 484 1989 | Windows, patio, painters | Camarillo · Ventura County | — | — |
| Calpro Pool And Spa | Calpro Pool And Spa | — | (805) 857 9935 | Pool | Simi Valley · Ventura County | — | — |
| Caltec Electric INC | Dan Gregory Moniz | — | (818) 620 6643 | Electricians | Thousand Oaks · Ventura County | — | — |