| D & L Plumbing | D & L Plumbing | — | (951) 353 5556 | Other | Grand Terrace · San Bernardino County | — | — |
| D & R Glass INC | Richard Wayne Scott | — | (909) 945 0508 | Windows, patio, painters | Rancho Cucamonga · San Bernardino County | — | — |
| D & R Plumbing INC | Michael Anthony Tommaney | — | (909) 627 2697 | GC, remodel, ADU | Chino · San Bernardino County | — | — |
| D & S Construction INC | Cory R L'allier | — | (760) 605 1756 | Other | Oak Hills · San Bernardino County | — | — |
| D & S Landscape Construction INC | Robby Dean Dominguez | — | (909) 838 5852 | Windows, patio, painters | Lake Arrowhead · San Bernardino County | — | — |
| D A C Automated Gates & Garage Doors | Dean Alan Cowan | — | (760) 413 8318 | Other | Yucca Valley · San Bernardino County | — | — |
| D A P Electric INC | David Agustin Perez | — | (909) 591 6900 | Electricians | Chino · San Bernardino County | — | — |
| D A Painting | D A Painting | — | (310) 940 9443 | Windows, patio, painters | Ontario · San Bernardino County | — | — |
| D And G Custom Cabinets And Artistic Finishes | David Angel Iniguez | — | (619) 366 7921 | Other | San Bernardino · San Bernardino County | — | — |
| D B G Tile | D B G Tile | — | (951) 553 9868 | Other | Chino · San Bernardino County | — | — |
| D B Window Covering Services | Donald Joseph Boswell | — | (909) 518 1713 | Other | Upland · San Bernardino County | — | — |
| D Backhoe Rental Services INC | Jose Guadalupe Delgadillo | — | (760) 488 7256 | Other | Hesperia · San Bernardino County | — | — |
| D Builders Co INC | Dario Hernandez | — | (626) 278 4594 | GC, remodel, ADU | Hesperia · San Bernardino County | — | — |
| D C Electric | Damon Richard Contaoi | — | (909) 725 6247 | Electricians | San Bernardino · San Bernardino County | — | — |
| D C Fire Protection | D C Fire Protection | — | (909) 261 5404 | Other | Apple Valley · San Bernardino County | — | — |
| D C Marble & Granite Restoration | Donald Edward Canchola | — | (909) 821 2670 | Restoration | Etiwanda · San Bernardino County | — | — |
| D C Sharp Construction INC | Dorman Clifford Sharp | — | (909) 337 6778 | GC, remodel, ADU | Blue Jay · San Bernardino County | — | — |
| D D L Traffic INC | Daniel Joseph Eichmann | cynthia@ddltraffic.com | (714) 321 7513 | Electricians | Chino Hills · San Bernardino County | — | — |
| D D Reinforcing | D D Reinforcing | — | (909) 226 3331 | Other | Crestline · San Bernardino County | — | — |
| D Diederich's Security INC | David Joseph Diederich | — | (909) 985 7231 | Alarm and generators | Upland · San Bernardino County | — | — |
| D Dominguez Landscape Construction INC | Dennis Curt Dominguez | — | (951) 203 7539 | Windows, patio, painters | Yucaipa · San Bernardino County | — | — |
| D E I Electric INC | Vernon Andrew Dinkel | sarah@deielectric.com | (951) 663 8570 | Electricians | Yucca Valley · San Bernardino County | — | — |
| D E R Hardwood Flooring | David Samuel Ramos | — | (442) 324 9587 | Other | Morongo Valley · San Bernardino County | — | — |
| D G Construction | David Armando Gomez | — | (909) 723 6003 | GC, remodel, ADU | San Bernardino · San Bernardino County | — | — |
| D G H Construction | David Grant Ii Haynes | — | (909) 689 7861 | GC, remodel, ADU | Rancho Cucamonga · San Bernardino County | — | — |
| D G Plumbing | D G Plumbing | — | (909) 277 4692 | Other | Bloomington · San Bernardino County | — | — |
| D H Air And Heating | D H Air And Heating | — | (909) 902 0841 | HVAC | Chino Hills · San Bernardino County | — | — |
| D I Electric Co | Iniguez David | — | (909) 495 6010 | Electricians | San Bernardino · San Bernardino County | — | — |
| D I Plumbing | D I Plumbing | — | (909) 374 0264 | Other | Fontana · San Bernardino County | — | — |
| D J Construction Services INC | Douglas Henry Gagnon | — | (909) 228 7032 | GC, remodel, ADU | Upland · San Bernardino County | — | — |
| D J Miller INC | Dennis Joel Miller | — | (909) 790 1100 | Other | Yucaipa · San Bernardino County | — | — |
| D J's Greensweep | D J's Greensweep | djsgreensweep@gmail.com | (909) 324-0489 | Windows, patio, painters | Alta Loma · San Bernardino County | — | — |
| D Kraus Construction | Derrick Allan Jr Kraus | — | (909) 747 8475 | GC, remodel, ADU | Blue Jay · San Bernardino County | — | — |
| D L Long Landscaping | D L Long Landscaping | — | (909) 628 5531 | Windows, patio, painters | Chino · San Bernardino County | — | — |
| D L Long Landscaping INC | David Lawrence Long | — | (909) 628 5531 | Windows, patio, painters | Chino · San Bernardino County | — | — |
| D L Williams Construction | Doyle Leroy Williams | — | (818) 590 4711 | GC, remodel, ADU | Victorville · San Bernardino County | — | — |
| D M A Design And Construction A Partnership | Noah Adeola Awoniyi | — | (951) 712 6575 | GC, remodel, ADU | Grand Terrace · San Bernardino County | — | — |
| D M B Electric Services Incorporated | Dwayne Martin Burnley | — | (818) 674 9997 | Electricians | Big Bear City · San Bernardino County | — | — |
| D M Briggs Electric | Dean Michael Briggs | — | (808) 346 6665 | Electricians | Pioneertown · San Bernardino County | — | — |
| D M Contracting INC | David Gonzalez Magana | — | (909) 824 7071 | Other | Colton · San Bernardino County | — | — |