| D J S General Contracting INC | Donald James Simington | — | (805) 584 2714 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| D J U Construction Services | David Joshua Uribe | — | (805) 665 7546 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| D John Roser INC | Natalie Anne Roser | — | (818) 706 2411 | Electricians | Westlake Village · Ventura County | — | — |
| D K Brown Construction INC | Douglas Keith Brown | — | (818) 515 7621 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| D K Construction | Donald Scott Kline | — | (661) 212 2702 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| D L G Coatings INC | Salomon John De La Garza | — | (805) 486 2400 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| D L Installations | D L Installations | — | (805) 390 9926 | Other | Moorpark · Ventura County | — | — |
| D L S Landscape Construction | Rene David De Los Santos | — | (805) 482 9909 | Windows, patio, painters | Camarillo · Ventura County | — | — |
| D Lewis Company | Drew Lewis Blaisdell | — | (805) 373 0668 | Other | Thousand Oaks · Ventura County | — | — |
| D Loza Construction | David Mike Loza | — | (805) 331 8429 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| D M Construction | Douglas Wayne Montgomery | — | (661) 917 1732 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| D M D Construction | David Michael Dunlap | — | (805) 625 4161 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| D M Electric | Daniel James Parker | — | (805) 804 2524 | Electricians | Ventura · Ventura County | — | — |
| D M H Construction | Denis Michael Hughes | — | (805) 340 7099 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| D M Mc Gahey Construction | Dennis Michael Mc Gahey | — | (805) 433 2360 | GC, remodel, ADU | Westlake Village · Ventura County | — | — |
| D Marriott Construction INC DBA M Construction INC | Daniel Anthony Ghir Marriott | — | (310) 415 1573 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| D P L Contractors INC | Dana Paul Lehto | — | (818) 254 7189 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| D R Design & Const INC | Henry Dozier Cane | — | (805) 377 2467 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| D R Dingman Const | D R Dingman Const | — | (805) 499 0660 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| D R G Painting | D R G Painting | — | (805) 276 8497 | Windows, patio, painters | Ventura · Ventura County | — | — |
| D R W Enterprises INC | Nicholas Ryan Chandler | — | (805) 673 6469 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| D Rhoden | D Rhoden | — | (805) 901 2098 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| D S Electrical | Storm David | — | (805) 857 5818 | Electricians | Thousand Oaks · Ventura County | — | — |
| D S R Plumbing Co INC | Doug Stewart Russell | — | (805) 578 0176 | Other | Simi Valley · Ventura County | — | — |
| D V C B INC | Donald Lionel Vanasse | — | (805) 383 9191 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| D Vega's Roofing | Barajas Daniel Vega | — | (805) 793 7444 | Other roofers | Oxnard · Ventura County | — | — |
| D W Construction & Backhoe Service | Dean William Wolff | — | (805) 497 2527 | Other | Thousand Oaks · Ventura County | — | — |
| D W Designs | D W Designs | — | (805) 338 0880 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| D Ward Designs Artistic Painting Company | Darin Jay Ward | — | (805) 444 1095 | Windows, patio, painters | Somis · Ventura County | — | — |
| D X Heating And Air Conditioning | Christopher William Azzinaro | — | (805) 587 6249 | HVAC | Simi Valley · Ventura County | — | — |
| D's Tree Service | Diosdado David | — | (805) 258 9005 | Other | Ventura · Ventura County | — | — |
| D.a.d. Protection Services | D.a.d. Protection Services | — | (805) 625-3925 | Alarm and generators | Oxnard · Ventura County | — | — |
| D1 Construction | Dylan Daune Mc Daniel | — | (805) 330 5500 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| D3 Construction Development INC | Jeffrey Garth Dedomenico | — | (805) 236 6884 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| D4 Construction Company LLC | Ara Baljian | — | (818) 402 3501 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Da Corsi Design And Construction | Joseph Edward Da Corsi | — | (818) 400 7445 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Dahme Heating And Air Conditioning INC | Scott Neal Harrell | — | (805) 638 3234 | HVAC | Simi Valley · Ventura County | — | — |
| Dakota Drilling & Concrete INC | Doug | — | (805) 483 5900 | Other | Oxnard · Ventura County | — | — |
| Dalco Forensic Consultants | John Michael Cooley | — | (805) 522 9588 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Dale Acres Construction | Arthur Dale Acres | — | (805) 582 0380 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |