| D N W Construction INC | Debra Sue Ward | — | (714) 321 3841 | GC, remodel, ADU | Brea · Orange County | — | — |
| D P & Associates INC | Paul Majil Lahaye | — | (714) 981 4746 | Other roofers | Placentia · Orange County | — | — |
| D P Electric | Douglas Ryan Purcell | — | (949) 307 6539 | Electricians | Costa Mesa · Orange County | — | — |
| D P Electrical | Dinh Chi Phan | — | (714) 721 0334 | Electricians | Westminster · Orange County | — | — |
| D P J Construction | Duane Paul Jones | — | (909) 648 5995 | GC, remodel, ADU | Irvine · Orange County | — | — |
| D P Reynolds Corporation | David James Reynolds | — | (949) 493 1050 | Windows, patio, painters | San Juan Capistrano · Orange County | — | — |
| D Paff - S R C | Daren M Paff | — | (714) 271 8195 | Other | Costa Mesa · Orange County | — | — |
| D R E Power And Cabling Contractors INC | David Christian Hoover | — | (714) 279 9590 | Electricians | Orange · Orange County | — | — |
| D R Electric | Dan Lee Rossen | — | (949) 246 1144 | Electricians | Newport Beach · Orange County | — | — |
| D R Ellis Contracting | David Robert Ellis | — | (949) 378 8997 | GC, remodel, ADU | Costa Mesa · Orange County | — | — |
| D R Flooring | D R Flooring | — | (714) 369 3477 | Other | Anaheim · Orange County | — | — |
| D R G Mechanical INC | Daniel Roger Guay | — | (714) 944 1085 | HVAC | Garden Grove · Orange County | — | — |
| D R N Construction | David Robert Navarro | — | (714) 454 7814 | GC, remodel, ADU | Huntington Beach · Orange County | — | — |
| D R S Construction | Schwab Jeanette | — | (949) 637 1456 | GC, remodel, ADU | Dana Point · Orange County | — | — |
| D S Builder | D S Builder | — | (949) 375 3657 | GC, remodel, ADU | Newport Beach · Orange County | — | — |
| D S C Electric INC | David Soren Swain | demsley@dscelectric.com | (949) 244 1362 | Electricians | Balboa Island · Orange County | — | — |
| D S Construction | Daniel Alberto Santone | — | (714) 386 9102 | GC, remodel, ADU | Yorba Linda · Orange County | — | — |
| D S Custom Painting INC | Daniel Evan Sorkin | — | (619) 315 3100 | Windows, patio, painters | Anaheim · Orange County | — | — |
| D S Engineering | D S Engineering | — | (714) 240 9622 | Other | Newport Beach · Orange County | — | — |
| D S G Plumbing | D S G Plumbing | — | (714) 813 2745 | Other | Fullerton · Orange County | — | — |
| D S G Signs - Graphics INC | Xuan Thanh Tran | — | (714) 677 0506 | Other | Westminster · Orange County | — | — |
| D S Landscape | D S Landscape | — | (714) 307 6071 | Windows, patio, painters | Orange · Orange County | — | — |
| D S M Communications | D S M Communications | — | (949) 916 7644 | Other | Lake Forest · Orange County | — | — |
| D S Oliver Construction | Dan Scott Oliver | — | (714) 331 5284 | GC, remodel, ADU | Costa Mesa · Orange County | — | — |
| D S V Painting | D S V Painting | — | (714) 991 2661 | Windows, patio, painters | Tustin · Orange County | — | — |
| D Salvador Roofing | Luis David Salvador Padilla | info@dsalvadorroofing.com | (949) 501 6564 | Other roofers | Santa Ana · Orange County | — | — |
| D Scott Designs INC | Douglas Scott Templin | — | (949) 697 2533 | Windows, patio, painters | Newport Beach · Orange County | — | — |
| D T D Electric | Dominic Tien Do | — | (714) 425 4825 | Electricians | Westminster · Orange County | — | — |
| D T M Construction Company INC | Laurie Frank Melillo | — | (714) 357 6998 | GC, remodel, ADU | Irvine · Orange County | — | — |
| D T S Electric INC | Daryl Francis Scherer | — | (714) 848 4313 | Electricians | Huntington Beach · Orange County | — | — |
| D U Y Refrigeration & Construction | Hien Vinh Huynh | — | (714) 608 6434 | HVAC | Fountain Valley · Orange County | — | — |
| D Y Electric | Daniel Evan Young | — | (714) 586 7472 | Electricians | Brea · Orange County | — | — |
| D Y M Builders Group INC | Shmaia Yarden | — | (310) 598 0312 | GC, remodel, ADU | Irvine · Orange County | — | — |
| D&d Company | Lee Duckhyung | — | (808) 398 2881 | Other | Yorba Linda · Orange County | — | — |
| D&r Tree Service INC | Vidals Ricardo Cortes | — | (714) 209 9426 | Tree | Anaheim · Orange County | — | — |
| D&s Equipment INC | Cavi Riva Barry | — | (949) 632 3305 | Other | Mission Viejo · Orange County | — | — |
| D' Cano Landscape | D' Cano Landscape | — | (714) 628 6080 | Windows, patio, painters | Anaheim · Orange County | — | — |
| D'ambra Construction | Dennis Frank D'ambra | — | (714) 848 9668 | GC, remodel, ADU | Huntington Beach · Orange County | — | — |
| D'mondragon Painting INC | Manuel Soto | — | (714) 315 7832 | Windows, patio, painters | Costa Mesa · Orange County | — | — |
| D'saachs Group INC | Giovanni D'saachs | — | (480) 570 1803 | GC, remodel, ADU | Yorba Linda · Orange County | — | — |