| Dean Security INC | John Thurman Dean | — | (818) 899 2222 | Alarm and generators | Simi Valley · Ventura County | — | — |
| Dean Vadnais | Dean Vadnais | — | (805) 646 5153 | GC, remodel, ADU | Ojai · Ventura County | — | — |
| Decades Strong Restoration INC DBA Servpro Of Northwest Ventura | Brandon Michael Hedding | — | (805) 507 5507 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Deckers Electric | Randall Joseph Deckers | — | (661) 713 4332 | Electricians | Ventura · Ventura County | — | — |
| Dedicated Builders LLC | Ivan Verne Lauritzen | — | (818) 419 2100 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Defined Av | Oswaldo Jr Quintero | info@definedav.com | (805) 376 0052 | Electricians | Newbury Park · Ventura County | — | — |
| Del Pinto Tile | Del Pinto Tile | — | (805) 798 2706 | GC, remodel, ADU | Ojai · Ventura County | — | — |
| Delahunt Custom Cabinets INC | David Michael Delahunt | — | (805) 358 7653 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Delfin T Asuncion Construction Co | Delfin Tolentino Asuncion | — | (310) 525 6568 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| Delgado A V | Delgado A V | — | (818) 481 2331 | Other | Simi Valley · Ventura County | — | — |
| Delightful Duck Cooling And Heating | Delightful Duck Cooling And Heating | info@delightfulduck.com | (805) 626-4201 | HVAC | Ventura · Ventura County | — | — |
| Delta Summit Services INC | Melvern Stephens Spedding | — | (833) 335 8272 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| Dempsey Electric | Timothy Michael Dempsey | — | (818) 281 0584 | Electricians | Moorpark · Ventura County | — | — |
| Denava | Andrew Alcala Aragon | — | (805) 304 0371 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Denning Electrical | Daniel Lee Denning | — | (805) 206 1611 | Electricians | Simi Valley · Ventura County | — | — |
| Dennis Alvarado Plumbing INC | Dennis Omar Alvarado | — | (805) 443 3104 | Other | Camarillo · Ventura County | — | — |
| Dennis Crawford | Dennis Crawford | — | (805) 304 2762 | Electricians | Simi Valley · Ventura County | — | — |
| Dennis Doherty General Contractor | Dennis Doherty General Contractor | — | (805) 377 0736 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| Dennis M Mc Coy | Dennis M Mc Coy | — | (818) 874 3872 | Other | Westlake Village · Ventura County | — | — |
| Dennis M Mc Coy & Sons INC | Dennis Marvin Mc Coy | — | (818) 874 3872 | Other | Westlake Village · Ventura County | — | — |
| Denton Electric | Steve Denton Koons | — | (818) 523 8812 | Electricians | Newbury Park · Ventura County | — | — |
| Denver Beard Drywall & Associates | Damon James Beard | — | (805) 304 5127 | Other | Moorpark · Ventura County | — | — |
| Denver Thomas Dale V | Denver Thomas Dale V | — | (310) 947 2788 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Dermot Carroll Tile Works | Dermot Carroll Tile Works | — | (805) 390 5902 | Other | Newbury Park · Ventura County | — | — |
| Derrick Electric | Bajnaith Derrick Maharaj | — | (805) 890 6213 | Electricians | Port Hueneme · Ventura County | — | — |
| Design Concepts Landscape INC | Marsh Lee Sanders | — | (805) 522 1266 | Windows, patio, painters | Camarillo · Ventura County | — | — |
| Design N Power | Antony Youssri Khalil | designnpower@gmail.com | (818) 306 8964 | Electricians | Simi Valley · Ventura County | — | — |
| Design Wall Systems Incorporated | Alan Dana Stevens | — | (818) 999 4366 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| Designer Homes | Diane Elizabeth Cristobal | — | (805) 312 6052 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| Designer Pools West | Designer Pools West | — | (805) 300 1655 | Pool | Newbury Park · Ventura County | — | — |
| Designs Plastering | Agustin Cordoba Espinoza | designsplasteringinc@yahoo.com | (805) 469 8395 | Other | Oxnard · Ventura County | — | — |
| Deverich Construction LLC | Deverich Eric | — | (805) 469 4428 | GC, remodel, ADU | Westlake Village · Ventura County | — | — |
| Deyoung Construction LLC | Nicholas John Deyoung | — | (805) 746 3445 | GC, remodel, ADU | Oak View · Ventura County | — | — |
| Dezlo INC | Lorenzo Valdez | — | (805) 816 5825 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Dg Electric | Daniel Ramon Gonzalez | — | (805) 901 3869 | Electricians | Ventura · Ventura County | — | — |
| Dgm Home Solutions INC | David George Mc Culloch | — | (818) 266 9034 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| Dh Construction | David Lee Hilton | — | (510) 237-7883 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Dial Security | William Hilton Dundas | — | (805) 389 6700 | Electricians | Camarillo · Ventura County | — | — |
| Diamenti Steel INC | Jared Geoffrey Diamenti | jareddiamentisteel@yahoo.com | (805) 404 3351 | Other | Simi Valley · Ventura County | — | — |
| Diamond C Construction | Adam Kenneth Cottingham | — | (415) 858 5873 | GC, remodel, ADU | Camarillo · Ventura County | — | — |