| Cory S Frizzell | Cory S Frizzell | — | (310) 863 2639 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| Cosi Designs INC DBA Cosi Designs & Construction | Claudio Cosi | — | (310) 734 4764 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Cotroneo's Construction Company | Richard John Cotroneo | — | (760) 617 6064 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| Countryside Property Services INC | Steve D Williams | — | (818) 834 9797 | GC, remodel, ADU | Westlake Village · Ventura County | — | — |
| County Fire Protection | County Fire Protection | — | (805) 650 1971 | Other | Ventura · Ventura County | — | — |
| County Line Electric INC | Jeffrey Bruce Tucker | — | (805) 499 0823 | Electricians | Thousand Oaks · Ventura County | — | — |
| County Pipeline INC | Mark Anthony Cortez | — | (805) 659 9780 | Other | Ventura · Ventura County | — | — |
| Countywide Remodeling | Countywide Remodeling | — | (800) 721 5583 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Court Video Conferencing Services Limited Liability Company | Alex Fabrizio Zavaleta | — | (805) 432 8133 | Other | Oxnard · Ventura County | — | — |
| Courtland Construction | Court Jac Clifford | — | (805) 660 9988 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Courtland Painting And Color Design | Courtland Painting And Color Design | — | (805) 490 2881 | Windows, patio, painters | Thousand Oaks · Ventura County | — | — |
| Courtyard Construction INC | Derek Michael Warner | interested@domainmarket.com | (818) 222 8541 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Coustic-glo | Johnny Reyes | — | (805) 306 8000 | Other | Simi Valley · Ventura County | — | — |
| Covaco Electric | William Alvarez Covarrubias | info@covacoelectric.com | (805) 604 9357 | Electricians | Ventura · Ventura County | — | — |
| Covarrubias Fine Custom Cabinetry LLC | Jose De Jesus Covarrubias Sanchez | — | (805) 415 4624 | Other | Oxnard · Ventura County | — | — |
| Covenant Protection | Covenant Protection | — | (877) 855-5217 | Alarm and generators | Simi Valley · Ventura County | — | — |
| Covered 6 LLC | Adam Paul Culbertson | — | (805) 926 2055 | Other | Moorpark · Ventura County | — | — |
| Coverfull Painting | Coverfull Painting | — | (805) 896 5002 | Windows, patio, painters | Oxnard · Ventura County | — | — |
| Coverpro | Jacob Jerald Ackerman | — | (877) 473 2943 | Pool | Ventura · Ventura County | — | — |
| Coverwiz INC | Andrew George Ben Reyes | — | (805) 218 2973 | Pool | Ventura · Ventura County | — | — |
| Cpr Construction | Edha Yahaira Espinosa | roy@cpr-construction.com | (418) 570-0177 | GC, remodel, ADU | Port Hueneme · Ventura County | — | — |
| Cpy Painting LLC | Kathleen Ann Kelly | — | (818) 264 8880 | Windows, patio, painters | Oxnard · Ventura County | — | — |
| Craftsman Construction | William Henry Valentine | — | (805) 750 2323 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Craig Allen Lucas | Craig Allen Lucas | — | (805) 320 9548 | Electricians | Ventura · Ventura County | — | — |
| Craig Allen Young Construction | Craig Allen Young | — | (805) 640 8042 | GC, remodel, ADU | Ojai · Ventura County | — | — |
| Craig M Iascone DBA Cmi Heating & Air | Cmi Heating & Air | — | (818) 585 5132 | HVAC | Thousand Oaks · Ventura County | — | — |
| Craig R Oswald | Craig R Oswald | — | (805) 797 6913 | GC, remodel, ADU | Oak View · Ventura County | — | — |
| Craig's Mr Fix It | Craig's Mr Fix It | — | (805) 520 7975 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Crain Graphics Sign Co. | Ronald Russell Crain | — | (805) 485 0099 | Other | Oxnard · Ventura County | — | — |
| Crawford Masonry | Crawford Masonry | — | (805) 485 1851 | Other | Oxnard · Ventura County | — | — |
| Crawford Painting LLC | Russell Ray Crawford | — | (805) 558 1068 | Windows, patio, painters | Ventura · Ventura County | — | — |
| Crc Plumbing | Crc Plumbing | — | (805) 432 3373 | Other | Thousand Oaks · Ventura County | — | — |
| Crdn Of Ventura Santa Barbara & San Luis Obispo Counties | Crdn Of Ventura Santa Barbara & San Luis Obispo Counties | — | (805) 223-0830 | Restoration | Ventura · Ventura County | — | — |
| Create-co Construction INC | Lorenzo David Moreno | service@createconstruction.com | (805) 803 4456 | GC, remodel, ADU | Moorpark · Ventura County | — | — |
| Creative Concepts Build | Thomas Lee Lasater | — | (805) 807 3206 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Creative Construction Sp INC | Lisa Lapearl Segovia | — | (805) 797 5863 | GC, remodel, ADU | Santa Paula · Ventura County | — | — |
| Creative Minds Custom Tile | Creative Minds Custom Tile | — | (805) 551 0078 | Other | Simi Valley · Ventura County | — | — |
| Creative Pools & Design LLC | Nathan Michael Whitson | — | (805) 479 7405 | GC, remodel, ADU | Santa Paula · Ventura County | — | — |
| Creative Roofing Solutions | Salvador Velazquez | info@creativeroofingsolutionsca.com | (805) 535 3101 | Other roofers | Ventura · Ventura County | — | — |
| Creative Security Systems INC | Charles James Shere | impallari@gmail.com | (805) 497 6333 | Electricians | Thousand Oaks · Ventura County | — | — |