| Demaio Plumbing INC | Ryan David De Maio | — | (714) 864 4052 | Other | Westminster · Orange County | — | — |
| Demel Metal Fabrication | Joseph Desmond Loui Demel | — | (714) 264 4846 | Other | Huntington Beach · Orange County | — | — |
| Demers Electric INC | Rosalio Soledad Cordero | — | (714) 612 9448 | Electricians | Fountain Valley · Orange County | — | — |
| Demers Enterprises INC | Dean Thomas Demers | — | (949) 830 5198 | Other | Lake Forest · Orange County | — | — |
| Demian Construction Co | Demian Petru | — | (714) 585 7907 | GC, remodel, ADU | Anaheim · Orange County | — | — |
| Demo & Abate INC | Jaymin Satish Gandhi | — | (714) 483 1534 | GC, remodel, ADU | Yorba Linda · Orange County | — | — |
| Demolition Services INC | Gregory James Lawrence | — | (714) 996 9929 | Other | Orange · Orange County | — | — |
| Dena Jean Bailey | Dena Jean Bailey | — | (714) 928 8418 | Other | Yorba Linda · Orange County | — | — |
| Denco Construction | Joey Anthony Querantes | — | (949) 302 5639 | GC, remodel, ADU | Laguna Beach · Orange County | — | — |
| Denham Pools | Denham Pools | — | (714) 891 6180 | Pool | Huntington Beach · Orange County | — | — |
| Denkers Garage Door | Denkers Garage Door | — | (714) 342 3901 | GC, remodel, ADU | Anaheim · Orange County | — | — |
| Denmac | Dennis James Mc Cartney | — | (949) 291 8257 | Windows, patio, painters | Mission Viejo · Orange County | — | — |
| Dennis Barkley | Dennis Barkley | — | (714) 478 3623 | GC, remodel, ADU | Huntington Beach · Orange County | — | — |
| Dennis Burge Painting | Dennis Burge Painting | — | (714) 348 2246 | Windows, patio, painters | Sunset Beach · Orange County | — | — |
| Dennis E Mc Cullough | Dennis E Mc Cullough | — | (949) 400 1037 | GC, remodel, ADU | Lake Forest · Orange County | — | — |
| Dennis L Paquette | Dennis L Paquette | — | (714) 832 1403 | GC, remodel, ADU | Tustin · Orange County | — | — |
| Dennis M Mulligan Plumbing INC | Brian Michael Mulligan | — | (714) 377 7589 | Other | Huntington Beach · Orange County | — | — |
| Dennis Meredith Construction | Dennis Keith Meredith | — | (714) 926 4772 | GC, remodel, ADU | Yorba Linda · Orange County | — | — |
| Dennis Metzler General Contracting | Dennis Wilfred Metzler | — | (949) 637 4320 | GC, remodel, ADU | Foothill Ranch · Orange County | — | — |
| Dennis Miller Carpet Service | Dennis Everett Miller | — | (714) 906 3428 | Other | San Clemente · Orange County | — | — |
| Dennis Shaffer Painting INC | Dennis Dean Shaffer | — | (949) 675 2746 | Windows, patio, painters | Laguna Beach · Orange County | — | — |
| Dennis W Copp DBA Copp Contracting | Dennis Wallace Copp | — | (714) 522 7754 | Other | Buena Park · Orange County | — | — |
| Denniston Fire Protection INC | Harley Scott Jr Shelton | — | (714) 450 8575 | Other | Anaheim · Orange County | — | — |
| Dependable Hardwood Floor | Dependable Hardwood Floor | — | (714) 539 8188 | Other | Garden Grove · Orange County | — | — |
| Dependable HVAC | Dependable HVAC | — | (714) 499 9922 | HVAC | Anaheim · Orange County | — | — |
| Depinho Roofing INC | Joseph Ramos Depinho | servicerequest@depinhoroofing.com | (714) 632 7663 | Other roofers | Orange · Orange County | — | — |
| Deq Electrical Services | Adam Anthony Aldequa | — | (619) 519 6810 | Electricians | Lake Forest · Orange County | — | — |
| Derek Crandall | Derek Crandall | — | (714) 474 4620 | Windows, patio, painters | Orange · Orange County | — | — |
| Derek James Amsberry | Derek James Amsberry | — | (949) 870 2741 | Electricians | Rancho Mission Viejo · Orange County | — | — |
| Derek Roland | Derek Roland | — | (949) 280 3633 | GC, remodel, ADU | San Clemente · Orange County | — | — |
| Derek Trabilcy Drywall INC | Derek Jon Trabilcy | — | (818) 254 7049 | Windows, patio, painters | Huntington Beach · Orange County | — | — |
| Derek's Plumbing | Derek's Plumbing | — | (714) 423 5055 | Other | Orange · Orange County | — | — |
| Desai Builders INC | Prashant Pradip Desai | — | (949) 423 3724 | GC, remodel, ADU | Santa Ana · Orange County | — | — |
| Deseret Landscape | Deseret Landscape | — | (949) 939 6840 | Windows, patio, painters | San Juan Capistrano · Orange County | — | — |
| Design & Renovation | Design & Renovation | — | (425) 466 6987 | GC, remodel, ADU | Mission Viejo · Orange County | — | — |
| Design And Build Services | Lowynn Celis Herrera | — | (714) 726 8235 | GC, remodel, ADU | Fullerton · Orange County | — | — |
| Design And Construction Services | Scott Anthony Mazzeo | — | (916) 806 6517 | GC, remodel, ADU | Corona Del Mar · Orange County | — | — |
| Design Builders | Design Builders | — | (714) 231 0743 | GC, remodel, ADU | Fullerton · Orange County | — | — |
| Design Builders And Associates | Michael James Jesse | — | (949) 331 5665 | GC, remodel, ADU | Lake Forest · Orange County | — | — |
| Design Concepts | Wassim Wafik Tawfik | — | (714) 403 1797 | Other | Orange · Orange County | — | — |