| Custom Iron Designs INC | Van Allen Todd | — | (805) 501 0866 | Other | Camarillo · Ventura County | — | — |
| Custom Restoration Construction | Christopher Michael Grasso | — | (775) 240 5122 | GC, remodel, ADU | Moorpark · Ventura County | — | — |
| Custom Woodcraft | Custom Woodcraft | — | (805) 404 2727 | Other | Simi Valley · Ventura County | — | — |
| Cut & Clean Landscape Services INC | Nkosilathi Khumalo | — | (805) 207 1929 | Windows, patio, painters | Camarillo · Ventura County | — | — |
| Cutcrete Sawing & Striping | Cutcrete Sawing & Striping | — | (805) 432 5860 | Other | Moorpark · Ventura County | — | — |
| Cutting Edge Concrete Cutting | Robert Anthony Di Nonno | rob@cuttingedgecc.net | (805) 577 6900 | Other | Simi Valley · Ventura County | — | — |
| Cutting Edge Landscapes INC | Onofre Jr Pulido | contact@cuttingedgelandscapes.com | (805) 760 4971 | Windows, patio, painters | Oxnard · Ventura County | — | — |
| Cutting Edge Woodworks INC | Steven Anthony Castro | — | (805) 433 3250 | Other | Moorpark · Ventura County | — | — |
| Cvis Corporation | Conejo Cabrera Carlos | — | (805) 698 0400 | Windows, patio, painters | Oxnard · Ventura County | — | — |
| Cw General Construction INC | Gus Sapera Constantin | — | (818) 267 0164 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Cwc Drywall | Cwc Drywall | — | (805) 732 9139 | Other | Westlake Village · Ventura County | — | — |
| D & A Construction | Daniel Cervantez Yanez | — | (805) 701 2802 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| D & A Framing INC | Matthew Russell Allen | — | (818) 577 8466 | Other | Westlake Village · Ventura County | — | — |
| D & D Baja Landscape | Howard Iii Schau | — | (805) 822 4063 | Windows, patio, painters | Ventura · Ventura County | — | — |
| D & D Home Improvement | D & D Home Improvement | — | (818) 968 4912 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| D & G Homes INC | Heinz Duetschler | — | (805) 298 0949 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| D & J Painting INC | Jennifer Marie Porter | — | (805) 630 5082 | Windows, patio, painters | Simi Valley · Ventura County | — | — |
| D & M Concrete | D & M Concrete | — | (805) 646 5976 | Other | Ojai · Ventura County | — | — |
| D & M Sheet Metal | D & M Sheet Metal | — | (805) 320 2391 | Other | Thousand Oaks · Ventura County | — | — |
| D - Mation INC | Paul Delano Jr Smith | — | (805) 551 1437 | Other | Simi Valley · Ventura County | — | — |
| D A Custom Flooring | D A Custom Flooring | — | (805) 832 2963 | Other | Santa Paula · Ventura County | — | — |
| D B M Construction And Consulting Corp | David Blake Metchis | — | (805) 304 9147 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| D B S Construction | Daniel Brian Sheridan | — | (805) 796 6754 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| D B Strauser Construction INC | William Brent Strauser | — | (805) 358 4961 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| D Bilaver Construction | Bilaver Damir | — | (818) 419 4464 | GC, remodel, ADU | Westlake Village · Ventura County | — | — |
| D C Concrete | D C Concrete | — | (805) 582 9329 | Other | Simi Valley · Ventura County | — | — |
| D C Cruz Construction INC | Daniel Jr Cervantes | — | (805) 340 5868 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| D C S Construction Services | Daniel Craig Smith | — | (805) 375 4874 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| D C W Refrigeration Services | David Christian Ro Wolfbrandt | — | (805) 620 2110 | HVAC | Ojai · Ventura County | — | — |
| D D C Management Services INC | Yvette Diana Soudani | — | (818) 991 1950 | GC, remodel, ADU | Westlake Village · Ventura County | — | — |
| D Drickersen Construction INC | Derian Gregory Drickersen | — | (805) 777 1144 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| D Fence Builder | D Fence Builder | — | (805) 367 5604 | Other | Moorpark · Ventura County | — | — |
| D G Hardwood Floors | D G Hardwood Floors | — | (805) 573 5980 | Other | Ojai · Ventura County | — | — |
| D G Manning DBA Qualified Builders | Qualified Builders | — | (805) 512 3699 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| D G Welding | D G Welding | — | (805) 856 8137 | Other | Ojai · Ventura County | — | — |
| D H Lion Construction | Daniel Matthew Hernandez | — | (805) 535 8743 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| D I M Development INC | Daniel Ricardo Mendoza | — | (323) 839-4236 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| D J Hunt Construction | David Jeffery Hunt | — | (805) 701 3711 | GC, remodel, ADU | Ojai · Ventura County | — | — |
| D J Insulation INC | Jimenez Hector | — | (805) 483 9020 | Other | Oxnard · Ventura County | — | — |
| D J Kelly Enterprises | David James Kelly | — | (818) 266 2553 | Electricians | Newbury Park · Ventura County | — | — |