| Dat T Nguyen Corp DBA Innovative Construction | Dat Thanh Nguyen | — | (858) 610 6900 | GC, remodel, ADU | Garden Grove · Orange County | — | — |
| Data Electric Corp | Lawrence Wayne Simon | — | (714) 282 1717 | Electricians | Orange · Orange County | — | — |
| Data Net Communications INC | Shawn Ashoubi | — | (949) 495 5863 | Other | Laguna Woods · Orange County | — | — |
| Data Specialties INC | Richard Conrad Maxson | — | (714) 523 8489 | Electricians | Buena Park · Orange County | — | — |
| Data Technologies INC DBA AC & C Network Services | Mary Adele Kane | — | (714) 693 3303 | Other | Placentia · Orange County | — | — |
| Data Voice Connections | Data Voice Connections | — | (714) 521 3572 | Other | Westminster · Orange County | — | — |
| Datagear INC | Lee Marvin Coffey | info@datagear.com | (714) 556 5055 | Electricians | Santa Ana · Orange County | — | — |
| Datra General Contractor | Datra General Contractor | — | (714) 418 1818 | GC, remodel, ADU | Westminster · Orange County | — | — |
| Daugherty Construction | Michael Jay Daugherty | — | (714) 329 6354 | GC, remodel, ADU | Huntington Beach · Orange County | — | — |
| Davani & Company | Ghamari Armin | — | (949) 837 5999 | GC, remodel, ADU | Laguna Hills · Orange County | — | — |
| Davart Pro Construction&plumbing INC | Adrian Nicolae Viusenco | — | (657) 262 7395 | GC, remodel, ADU | Anaheim · Orange County | — | — |
| Davco Construction Co | David Wayne Gregory | — | (714) 757 4296 | GC, remodel, ADU | Huntington Beach · Orange County | — | — |
| Dave Affordable Custom Landscaping | Dave Affordable Custom Landscaping | — | (714) 356 9097 | Windows, patio, painters | Huntington Beach · Orange County | — | — |
| Dave Araujo Plumbing | Dave Araujo Plumbing | — | (714) 585 9357 | Other | Placentia · Orange County | — | — |
| Dave Bang Associates Incorporated Of California | John Lawrence Wormell | — | (800) 669 2585 | Other | Tustin · Orange County | — | — |
| Dave Brand | Dave Brand | — | (310) 713 5645 | Other | Los Alamitos · Orange County | — | — |
| Dave Cleveland Construction INC | David Charles Cleveland | — | (949) 355 5250 | GC, remodel, ADU | Costa Mesa · Orange County | — | — |
| Dave Cliff DBA Santa Ana Tile | Santa Ana Tile | — | (714) 272 8453 | Other | Anaheim · Orange County | — | — |
| Dave Cook Concrete Construction | David William Cook | — | (949) 481 7007 | Other | Capistrano Beach · Orange County | — | — |
| Dave Desatoff Backhoe Service INC | David Alex Desatoff | — | (714) 848 9862 | Other | Huntington Beach · Orange County | — | — |
| Dave Gabay General Bldg Contractor INC | David John Jr Gabay | — | (949) 413 7828 | GC, remodel, ADU | San Juan Capistrano · Orange County | — | — |
| Dave Leese Concrete | Dave Leese Concrete | — | (949) 859 6699 | Pool | Lake Forest · Orange County | — | — |
| Dave Simpson Gardening Services | David Glen Simpson | — | (714) 726 7660 | Windows, patio, painters | Cypress · Orange County | — | — |
| Dave Ware Masonry | Dave Ware Masonry | — | (949) 581 2983 | Other | Mission Viejo · Orange County | — | — |
| Dave Young Electric | David Stephen Young | — | (714) 747 7647 | Electricians | Huntington Beach · Orange County | — | — |
| Dave's Cabinet Installation Services | Anthony David Young | — | (714) 984 4964 | Other | Placentia · Orange County | — | — |
| Dave's Door And Hardware | Dave's Door And Hardware | — | (714) 842 0299 | Other | Huntington Beach · Orange County | — | — |
| Dave's Landscape Business INC | David Leigh Bost | — | (602) 740 3108 | Windows, patio, painters | Ladera Ranch · Orange County | — | — |
| David & David Flooring INC | David Jr Ornelas | — | (949) 335 8361 | Other | Westminster · Orange County | — | — |
| David A Beard General Contractor | David A Beard General Contractor | — | (714) 788 0466 | GC, remodel, ADU | Fullerton · Orange County | — | — |
| David A Belasquez | David A Belasquez | — | (714) 878 9615 | Other | Brea · Orange County | — | — |
| David A Ellis | David A Ellis | — | (949) 300 6196 | Windows, patio, painters | Laguna Beach · Orange County | — | — |
| David A Poeske Construction | David Andrew Poeske | — | (949) 495 5869 | GC, remodel, ADU | Laguna Niguel · Orange County | — | — |
| David A Scholar & Associates INC DBA Das Construction | David Anthony Scholar | — | (949) 836 0931 | GC, remodel, ADU | Newport Beach · Orange County | — | — |
| David A Weld | David A Weld | — | (949) 275 8720 | GC, remodel, ADU | San Clemente · Orange County | — | — |
| David Alvarez | David Alvarez | jeremy@digitalimpactand.com | (562) 761 3267 | GC, remodel, ADU | Laguna Niguel · Orange County | — | — |
| David Arnold | David Arnold | — | (714) 838 8612 | GC, remodel, ADU | Tustin · Orange County | — | — |
| David B Mc Cauley Construction | David Brent Mc Cauley | — | (714) 335 3292 | GC, remodel, ADU | Fullerton · Orange County | — | — |
| David Boggs Plastering | David Boggs Plastering | — | (760) 250 2918 | Other | Huntington Beach · Orange County | — | — |
| David Boutelle Plumbing | David Boutelle Plumbing | — | (949) 439 1223 | Other | Laguna Niguel · Orange County | — | — |