| Design Hardwoods INC | Rebecca Ellen Harrison | — | (714) 241 0440 | Other | Santa Ana · Orange County | — | — |
| Design Hive Construction | John Daniel Swarm | astigma@astigmatic.com | (714) 583 3227 | GC, remodel, ADU | Huntington Beach · Orange County | — | — |
| Design Plus 2000 INC | Jim Binandeh | — | (714) 396 6519 | GC, remodel, ADU | Brea · Orange County | — | — |
| Design Story Construction INC | Chanyoung Jung | — | (213) 296 7588 | GC, remodel, ADU | Brea · Orange County | — | — |
| Design Trend | Design Trend | — | (714) 432 1131 | Other | Costa Mesa · Orange County | — | — |
| Design Woodworking | Design Woodworking | — | (949) 246 4520 | Other | Huntington Beach · Orange County | — | — |
| Designed Technical Solutions INC | Michael Wallace Zuehl | — | (714) 402 5370 | Other roofers | Lake Forest · Orange County | — | — |
| Designer's Magic Flooring | Designer's Magic Flooring | — | (949) 496 1926 | Other | San Clemente · Orange County | — | — |
| Designing Women Of Orange County | Christos Konstantinos Grammatikas | — | (949) 371 9075 | GC, remodel, ADU | Laguna Niguel · Orange County | — | — |
| Designs & Applications | Designs & Applications | — | (714) 499 2400 | Windows, patio, painters | Huntington Beach · Orange County | — | — |
| Designs By Dian Window Treatments | Designs By Dian Window Treatments | — | (714) 454 0705 | Other | Mission Viejo · Orange County | — | — |
| Designs By Dumas INC DBA Terin Dumas Interior Artistry | Terin Maurice Dumas | — | (949) 637 3425 | GC, remodel, ADU | Fullerton · Orange County | — | — |
| Designtime Design & Build Inc. | Briana Yvette Denney | — | (949) 503 2009 | GC, remodel, ADU | Dana Point · Orange County | — | — |
| Designworks Construction | William Ryan Lenocker | — | (714) 270 7355 | GC, remodel, ADU | Orange · Orange County | — | — |
| Destination West Builders LLC | Jon Martin Archer | information@destinationwestbuilders.com | (619) 587 2033 | GC, remodel, ADU | Newport Beach · Orange County | — | — |
| Destiny Construction INC | Myung Chul Yi | — | (949) 554 9692 | GC, remodel, ADU | Cypress · Orange County | — | — |
| Details Cc INC | Debra Gay Martin | — | (714) 239 5000 | GC, remodel, ADU | Anaheim · Orange County | — | — |
| Detula Construction | Valera Enrique | — | (714) 758 8665 | GC, remodel, ADU | Anaheim · Orange County | — | — |
| Devco Homes | Jonathan David Deverian | hello@devcohomes.com | (949) 212 3262 | GC, remodel, ADU | Newport Beach · Orange County | — | — |
| Developer Services Corporation | Jeffrey Bart Evans | — | (949) 678 5449 | GC, remodel, ADU | Rancho Santa Margarita · Orange County | — | — |
| Developers General Contracting INC | Abdul Khalil Mohtasebzada | — | (949) 351 7872 | GC, remodel, ADU | Irvine · Orange County | — | — |
| Developers Specialties | Developers Specialties | — | (949) 631 6780 | GC, remodel, ADU | Costa Mesa · Orange County | — | — |
| Development Support Services INC | Michael Dean Smith | — | (714) 957 8250 | GC, remodel, ADU | Tustin · Orange County | — | — |
| Devi Construction INC | Nitesh Prit Patel | — | (949) 294 2155 | GC, remodel, ADU | Irvine · Orange County | — | — |
| Devick Construction | David Harold Devick | — | (949) 283 4563 | GC, remodel, ADU | Newport Beach · Orange County | — | — |
| Devina INC | Fariba Esmaeili | — | (714) 357 7156 | GC, remodel, ADU | Laguna Hills · Orange County | — | — |
| Devinney Plumbing INC | Donald Glenn De Vinney | — | (714) 375 0126 | Other | Huntington Beach · Orange County | — | — |
| Devran Finestein | Devran Finestein | — | (714) 345 4361 | Pool | Anaheim Hills · Orange County | — | — |
| Dew Electric | Wells Darell | — | (949) 521 2039 | Electricians | Lake Forest · Orange County | — | — |
| Dewco | David Eugene Walser | — | (714) 283 1700 | Electricians | Anaheim · Orange County | — | — |
| Dewell Construction | Richard James Dewell | — | (714) 496 1427 | GC, remodel, ADU | Orange · Orange County | — | — |
| Dexcon Corporation | Ardalan Abghari | — | (714) 421 3374 | GC, remodel, ADU | San Clemente · Orange County | — | — |
| Dexore INC | Georges Adib Hajj | — | (714) 936 9327 | GC, remodel, ADU | Brea · Orange County | — | — |
| Dexterity Tile Solutions INC | Eric Steven Schaefer | — | (949) 291 6691 | Other | Westminster · Orange County | — | — |
| Df Signs & Graphics INC | David Alan Flynn | — | (562) 544 1377 | Other | Huntington Beach · Orange County | — | — |
| Dg & Co Construction INC | Duy Bac Do | — | (714) 909 9292 | GC, remodel, ADU | Garden Grove · Orange County | — | — |
| Dg Dreamscapes INC | Salgado Daniel Guadarrama | — | (949) 201 9544 | Windows, patio, painters | San Juan Capistrano · Orange County | — | — |
| Dg Precision Installations INC | Daniel James Hess | — | (714) 264 8693 | Other | Fountain Valley · Orange County | — | — |
| Dgf Heating & Air Conditioning | Dgf Heating & Air Conditioning | — | (714) 709 0793 | HVAC | Santa Ana · Orange County | — | — |
| Dgiii Design & Remodeling | Dgiii Design & Remodeling | — | (949) 395 1232 | GC, remodel, ADU | San Clemente · Orange County | — | — |