| Davies Heating & Air | Davies Heating & Air | — | (909) 520 6745 | HVAC | Spring Valley Lake · San Bernardino County | — | — |
| Davies Home Solutions | Davies Home Solutions | — | (909) 765 6996 | GC, remodel, ADU | San Bernardino · San Bernardino County | — | — |
| Davila's Custom Cabinets | Davila's Custom Cabinets | — | (909) 591 2779 | Other | Chino Hills · San Bernardino County | — | — |
| Davinson Porto | Davinson Porto | — | (310) 339 3856 | Electricians | Ontario · San Bernardino County | — | — |
| Davis & Davis Specialties INC | Steve Phillip Davis | — | (909) 822 5704 | Windows, patio, painters | Yucaipa · San Bernardino County | — | — |
| Davis Development Company INC | Randolph Scott Davis | — | (909) 944 4899 | GC, remodel, ADU | Rancho Cucamonga · San Bernardino County | — | — |
| Davis Mobile Home Services | Davis Michael Workentin | — | (909) 545 1531 | Other | Ontario · San Bernardino County | — | — |
| Day 6 Construction | Robert Leslie Foy | — | (909) 809 8028 | Electricians | Yucaipa · San Bernardino County | — | — |
| Day Star Development Co | Larry Dewayne Weeks | — | (469) 560 0042 | GC, remodel, ADU | Yucca Valley · San Bernardino County | — | — |
| Daynes Construction | Daniel Taylor Daynes | — | (909) 289 2206 | GC, remodel, ADU | San Bernardino · San Bernardino County | — | — |
| Dayton Welding | Dayton Welding | — | (760) 912 5708 | Other | Hesperia · San Bernardino County | — | — |
| Db Construction INC | Damien Lance Barraza | dave@dbconstruction.com | (909) 971 3820 | GC, remodel, ADU | Ontario · San Bernardino County | — | — |
| Db Plumbing Services | David Alan Burt | — | (951) 227 5744 | Other | Hesperia · San Bernardino County | — | — |
| Db Tree Service | Vasquez Beatriz Urena | doncallender77@gmail.com | (714) 717 5147 | Other | Chino · San Bernardino County | — | — |
| Dbrs Medical Systems INC | Carl John Frank | — | (909) 364 9547 | Other | Chino · San Bernardino County | — | — |
| Dc Audio | Dc Audio | — | (909) 381-3300 | Alarm and generators | San Bernardino · San Bernardino County | — | — |
| Dc Construction LLC | Carrera David | — | (760) 949 7009 | GC, remodel, ADU | Loma Linda · San Bernardino County | — | — |
| Dc2 Construction | David Leung | — | (909) 459 0002 | GC, remodel, ADU | Ontario · San Bernardino County | — | — |
| Dcc Demolition Service INC | Daniel Michael Padilla | — | (909) 326 0241 | Other | Chino · San Bernardino County | — | — |
| Dcfm Management LLC | Devin Coughlin Fitzgerald | — | (909) 270 0463 | GC, remodel, ADU | Chino · San Bernardino County | — | — |
| Dchristjan Fine Cabinetry | Laurie Denise Vonk | — | (909) 923 4100 | GC, remodel, ADU | Ontario · San Bernardino County | — | — |
| Dcm Designs INC | Derick Christopher Mcgee | — | (760) 900 1467 | GC, remodel, ADU | Hesperia · San Bernardino County | — | — |
| Dcs Duggin Contracting Services | Dale Edward Duggin | — | (909) 792 7061 | GC, remodel, ADU | Redlands · San Bernardino County | — | — |
| Dcw Development INC | Wei-Chung Chen | — | (909) 493 6628 | GC, remodel, ADU | Chino Hills · San Bernardino County | — | — |
| Dd Painting | Dd Painting | don@ddpainting.com | (909) 379 5453 | Windows, patio, painters | San Bernardino · San Bernardino County | — | — |
| Ddc Electric INC | Edwin Herrera | — | (909) 936 7522 | Electricians | Alta Loma · San Bernardino County | — | — |
| Ddgp INC DBA Westcoast Pool Service And Repair | David Vincent Dragna | — | (909) 838 2947 | Pool | Upland · San Bernardino County | — | — |
| Ddh Apple Valley Construction INC | Jeremy Jason Hamilton | — | (760) 247 4810 | GC, remodel, ADU | Apple Valley · San Bernardino County | — | — |
| Ddl Construction INC | Xing Li | — | (626) 861 1826 | GC, remodel, ADU | Ontario · San Bernardino County | — | — |
| Ddm Construction Services LLC | Daniel Mark Forbes | — | (760) 552 3860 | GC, remodel, ADU | Phelan · San Bernardino County | — | — |
| Ddpt INC | David Liang Hua Peh | — | (909) 595 8858 | GC, remodel, ADU | Ontario · San Bernardino County | — | — |
| De Hart Construction Services INC | David Brian Dehart | — | (909) 335 0148 | GC, remodel, ADU | Redlands · San Bernardino County | — | — |
| De Hoog Construction | John E De Hoog | — | (909) 557 5147 | GC, remodel, ADU | Redlands · San Bernardino County | — | — |
| De La Rosa Builders Corp | La Rosa Haro Raul De | — | (909) 633 3709 | GC, remodel, ADU | Highland · San Bernardino County | — | — |
| De La Rosa Home Remodeling INC | Andrea Lopez | — | (562) 235 6250 | GC, remodel, ADU | Yucaipa · San Bernardino County | — | — |
| De La Torre Terrazzo Company | Donovan Luis Taylor De La Torre | — | (909) 393 6761 | Other | Chino Hills · San Bernardino County | — | — |
| De Leon Painting | De Leon Painting | — | (213) 925 9732 | Windows, patio, painters | Victorville · San Bernardino County | — | — |
| De Los Rios Tile | De Los Rios Tile | — | (626) 715 1064 | Other | Fontana · San Bernardino County | — | — |
| De Muth Plumbing | De Muth Plumbing | — | (909) 406 3562 | Other | Redlands · San Bernardino County | — | — |
| De Paul Demolition Services | Steven Anthony Depaul | — | (626) 856 9518 | Other | Chino · San Bernardino County | — | — |