| Double Pane Doctors | Kory Scott Bersuch | — | (562) 335 9697 | Windows, patio, painters | Seal Beach · Orange County | — | — |
| Double R Development | James Douglas Root | — | (949) 285 3652 | GC, remodel, ADU | Newport Beach · Orange County | — | — |
| Double River Construction LLC | Miao He | — | (213) 449 2949 | GC, remodel, ADU | Irvine · Orange County | — | — |
| Doug Browne DBA Environmental Engineering Enterprises | Douglas Brian Browne | — | (714) 302 8121 | HVAC | Anaheim · Orange County | — | — |
| Doug Dragovich | Doug Dragovich | — | (714) 915 7733 | Other | Orange · Orange County | — | — |
| Doug Hutchinson Construction | Richard Anthony Herbert | — | (714) 350 5091 | GC, remodel, ADU | Stanton · Orange County | — | — |
| Doug Martin Contracting Company INC | Douglas Frederick Martin | — | (714) 441 0513 | Other | La Habra · Orange County | — | — |
| Doug's Decorating | Doug's Decorating | — | (714) 875 2296 | GC, remodel, ADU | San Juan Capistrano · Orange County | — | — |
| Doug's Installations | Doug's Installations | — | (949) 678 3652 | Other | Santa Ana · Orange County | — | — |
| Doug's Pool Service | Douglas Allen Beard | — | (714) 534 5405 | Pool | Garden Grove · Orange County | — | — |
| Douglas Alvy | Douglas Alvy | — | (310) 935 9313 | Other | Seal Beach · Orange County | — | — |
| Douglas Christopher Love Construction INC | Douglas Christopher Love | — | (714) 609 5189 | GC, remodel, ADU | Huntington Beach · Orange County | — | — |
| Douglas Door Repair Co INC | Steven Douglas Beauchamp | — | (714) 739 2073 | Other | Buena Park · Orange County | — | — |
| Douglas Edward Menezes | Douglas Edward Menezes | — | (714) 936 1873 | Other | Tustin · Orange County | — | — |
| Douglas F Martin | Douglas F Martin | — | (714) 240 7166 | GC, remodel, ADU | Huntington Beach · Orange County | — | — |
| Douglas Furman Landscaping | Douglas Furman Landscaping | — | (714) 478 9700 | Windows, patio, painters | Fullerton · Orange County | — | — |
| Douglas Mechanical Services | Douglas Troy Fatone | — | (562) 250 5755 | HVAC | Los Alamitos · Orange County | — | — |
| Douglas Ryan Lissner | Douglas Ryan Lissner | — | (714) 657 5027 | GC, remodel, ADU | Tustin · Orange County | — | — |
| Douglas S Whitney | Douglas S Whitney | — | (714) 329 8848 | GC, remodel, ADU | Yorba Linda · Orange County | — | — |
| Douglas Sauceda | Douglas Sauceda | — | (714) 926 1786 | Other | Santa Ana · Orange County | — | — |
| Douglas Security | Douglas Security | — | (714) 392 0448 | Electricians | Seal Beach · Orange County | — | — |
| Douglas Waller Construction INC | Douglas Marvin Waller | — | (562) 818 6353 | GC, remodel, ADU | Seal Beach · Orange County | — | — |
| Dove Ceilings North | Dove Ceilings North | — | (949) 597 1794 | Other | Lake Forest · Orange County | — | — |
| Dove Ceilings South | Dove Ceilings South | — | (949) 597 1333 | Other | Rancho Mission Viejo · Orange County | — | — |
| Dove Electric | Nathan Thomas Dove | — | (949) 922 8362 | Electricians | Costa Mesa · Orange County | — | — |
| Dovetail Construction Services | Richard Emilio Maddaloni | — | (949) 456 0049 | GC, remodel, ADU | Aliso Viejo · Orange County | — | — |
| Dovi Landscape | Vinh Quang Do | — | (949) 584 8024 | Windows, patio, painters | Mission Viejo · Orange County | — | — |
| Down To Earth Lawn & Garden Service LLC | Michael Kevin Wells | — | (949) 646 7819 | Windows, patio, painters | Costa Mesa · Orange County | — | — |
| Downunder Landscape INC | Michael John Hartigan | — | (949) 248 3171 | Windows, patio, painters | San Clemente · Orange County | — | — |
| Dp Roofing & Painting INC | Daniel Williamson Parks | — | (949) 875 8188 | Other roofers | Costa Mesa · Orange County | — | — |
| Dpk General Engineering INC | Dipak Pravin Bhakta | — | (714) 600 4483 | GC, remodel, ADU | Anaheim · Orange County | — | — |
| Dpl Air Conditioning INC | David Patrick Lee | — | (714) 609 9795 | HVAC | Placentia · Orange County | — | — |
| Dpr Incorporated | Samuel Bustos | — | (657) 615 2803 | Other | Anaheim · Orange County | — | — |
| Dps LLC | Dennis Robert Winners | — | (949) 842 3347 | Pool | Yorba Linda · Orange County | — | — |
| Dps Security Services- Local Adt Authorized Dealer | Dps Security Services- Local Adt Authorized Dealer | info@dpssecurityservices.com | (714) 441-8999 | Alarm and generators | Irvine · Orange County | — | — |
| Dr Air Pro Services | Eric Eugene Tash | drairproservices@gmail.com | (949) 241 0407 | HVAC | Irvine · Orange County | — | — |
| Dr Drip Roof Repair | Dr Drip Roof Repair | — | (714) 404 0985 | Other roofers | Placentia · Orange County | — | — |
| Dr Pipes Plumbing | Dr Pipes Plumbing | — | (714) 681 0864 | Other | Buena Park · Orange County | — | — |
| Dr Sprinkler | Brett Thomas De Luca | — | (714) 253 7797 | Windows, patio, painters | Huntington Beach · Orange County | — | — |
| Dragon Construction Company | David Van Ngo | — | (714) 818 5458 | GC, remodel, ADU | Westminster · Orange County | — | — |