| D M Electrical Solutions | Marco Antonio Cazares | — | (562) 299 4630 | Electricians | Rancho Cucamonga · San Bernardino County | — | — |
| D M Gorder Construction Co | David Michael Gorder | — | (909) 240 8028 | GC, remodel, ADU | Ontario · San Bernardino County | — | — |
| D M K Homes | D M K Homes | — | (760) 559 3916 | GC, remodel, ADU | Hesperia · San Bernardino County | — | — |
| D M Mobile Home Services | Mascareno Danny | — | (442) 284 3036 | Other | Victorville · San Bernardino County | — | — |
| D M N Electrical | Douglas Matthew Naddour | — | (714) 292 2062 | Electricians | Yucaipa · San Bernardino County | — | — |
| D M Sanborn Pipeline Contractors | David Michael Sanborn | — | (951) 712 6192 | Other | Redlands · San Bernardino County | — | — |
| D N C Landscape Services | Juan Carlos Medina | — | (909) 559 3627 | Windows, patio, painters | Upland · San Bernardino County | — | — |
| D P Door Company INC | David Frederic Patsch | — | (909) 989 1477 | GC, remodel, ADU | Rancho Cucamonga · San Bernardino County | — | — |
| D P M Construction | Daniel Paul Marquez | — | (951) 496 1868 | GC, remodel, ADU | Hesperia · San Bernardino County | — | — |
| D R Plumbing Services | Rodger Lee Bombard | — | (909) 728 1759 | Other | Fontana · San Bernardino County | — | — |
| D Rod Construction INC | David Rodriguez | — | (310) 256 5458 | GC, remodel, ADU | Rancho Cucamonga · San Bernardino County | — | — |
| D S Cabinets | D S Cabinets | — | (909) 767 1674 | Other | Alta Loma · San Bernardino County | — | — |
| D S S | D S S | — | (213) 344 6686 | Other | Ontario · San Bernardino County | — | — |
| D T G Builders INC | Daniel Thomas Gaston | — | (909) 948 1887 | GC, remodel, ADU | Alta Loma · San Bernardino County | — | — |
| D T M Painting | D T M Painting | — | (909) 844 3685 | Windows, patio, painters | Yucaipa · San Bernardino County | — | — |
| D W Drywall | D W Drywall | dwdrywall2@yahoo.com | (951) 312 1665 | GC, remodel, ADU | Apple Valley · San Bernardino County | — | — |
| D Webb Incorporated | David Brian Webb | — | (760) 401 2034 | GC, remodel, ADU | Yucca Valley · San Bernardino County | — | — |
| D Wilson Tile And Marble | D Wilson Tile And Marble | — | (951) 385 3527 | Other | Pinon Hills · San Bernardino County | — | — |
| D Y C Framing INC | Daaron Edward Yester | — | (760) 406 7095 | GC, remodel, ADU | Morongo Valley · San Bernardino County | — | — |
| D Z Painting | D Z Painting | — | (909) 841 9897 | Windows, patio, painters | Hesperia · San Bernardino County | — | — |
| D&j Lighting Maintenance INC | David Matthew Kelly | — | (714) 457 7594 | Electricians | Fontana · San Bernardino County | — | — |
| D&m Martin Construction INC | Suzanne Lynne Martin | — | (909) 338 1348 | GC, remodel, ADU | Highland · San Bernardino County | — | — |
| D&vl Electric INC | Danny Ernest Lopez | — | (323) 618 7015 | Electricians | Hesperia · San Bernardino County | — | — |
| D'andrea Construction | Daniel Mark D'andrea | — | (909) 941 4254 | GC, remodel, ADU | Alta Loma · San Bernardino County | — | — |
| D10 Prefabricated Specialties | David Joshua Solis | — | (909) 456 4480 | Other | Upland · San Bernardino County | — | — |
| Da General Contractors | Da General Contractors | — | (909) 914-5368 | GC, remodel, ADU | San Bernardino · San Bernardino County | — | — |
| Da Valle Construction INC | Nicholas Daniel Davalle | — | (909) 342 7377 | GC, remodel, ADU | Chino · San Bernardino County | — | — |
| Dabertri Sign Services INC | Manuel Alfonso Trinidad | — | (562) 322 6928 | Other | Chino Hills · San Bernardino County | — | — |
| Dac Wire & Cable | Dac Wire & Cable | — | (714) 293 8271 | Other | Fontana · San Bernardino County | — | — |
| Dahlquist Construction | Roger Leroy Jr Dahlquist | — | (760) 991 7866 | GC, remodel, ADU | Loma Linda · San Bernardino County | — | — |
| Daily Electric INC | William Paul Daily | — | (909) 627 5820 | Electricians | Chino · San Bernardino County | — | — |
| Daires Design Cabinetry | Daires Design Cabinetry | — | (909) 510 3143 | Other | Colton · San Bernardino County | — | — |
| Daisy Gonzalez | Daisy Gonzalez | — | (909) 200 0760 | Other | Fontana · San Bernardino County | — | — |
| Daisy Lane Construction | Rick Ray Kenny | — | (760) 646 2360 | GC, remodel, ADU | Phelan · San Bernardino County | — | — |
| Dakanb Painting & Wallcovering | Dakanb Painting & Wallcovering | — | (626) 222 3038 | Windows, patio, painters | Fontana · San Bernardino County | — | — |
| Dakota Backflow Co | Clifford Dale Jr White | dakotabackflow@gmail.com | (951) 543-2205 | Other | Rancho Cucamonga · San Bernardino County | — | — |
| Dakota Civil INC | Kevin Stuart Ellis | — | (909) 709 5359 | Other | Yucaipa · San Bernardino County | — | — |
| Dale Eugene Johnson | Dale Eugene Johnson | — | (760) 401 0855 | GC, remodel, ADU | Yucca Valley · San Bernardino County | — | — |
| Dale Sauter | Dale Sauter | — | (909) 376 4257 | Other | Fontana · San Bernardino County | — | — |
| Dale Stuart | Dale Stuart | — | (909) 695 5027 | GC, remodel, ADU | Fontana · San Bernardino County | — | — |