| D & D Electric INC | Jeffrey Craig Davis | contact@ddelectric.com | (951) 302 3165 | Electricians | Temecula · Riverside County | — | — |
| D & D Laser Screed INC | Tommy Keith Daniel | — | (951) 245 3595 | Other | Lake Elsinore · Riverside County | — | — |
| D & D Plastering Enterprises INC | Douglas James Davison | — | (760) 861 4717 | Other | La Quinta · Riverside County | — | — |
| D & D Plumbing & Mechanical | Dan Ray Byerley | — | (951) 906 6111 | Other | Wildomar · Riverside County | — | — |
| D & E | Dylan Parker Dixon | — | (951) 514 6757 | Tree | Murrieta · Riverside County | — | — |
| D & E Concrete LLC | Jesus Damian Rivera | — | (951) 207 1093 | Other | Moreno Valley · Riverside County | — | — |
| D & E Restoration | Boban Ciolac | — | (951) 305 0629 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| D & P Engineering INC | Daniel Razo Gutierrez | — | (760) 404 7773 | GC, remodel, ADU | Thermal · Riverside County | — | — |
| D & P Leak Detection INC | Peter Anthony Jr Cepeda | — | (800) 677 0294 | Other | Riverside · Riverside County | — | — |
| D & P Lyn Dinasty | D & P Lyn Dinasty | — | (951) 218 8422 | Windows, patio, painters | Norco · Riverside County | — | — |
| D & R Construction | Melendez Ronald | — | (626) 890 6371 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| D & R Flooring INC | Azalea Rodriguez | — | (760) 848 0321 | Other | Palm Desert · Riverside County | — | — |
| D & R Restoration Services INC | Marius Vasile Magda | — | (909) 806 0619 | GC, remodel, ADU | Lake Elsinore · Riverside County | — | — |
| D & R Robles Construction | Damian Salvador Robles | — | (951) 543 5815 | GC, remodel, ADU | Lake Elsinore · Riverside County | — | — |
| D & R Waterproofing & Painting Service INC | Kenneth Robert Fewell | — | (323) 552 8600 | GC, remodel, ADU | Menifee · Riverside County | — | — |
| D & S Construction Company | David Gary Pierce | — | (951) 529 3744 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| D & S Contractors INC | Dan John Zuppardo | — | (951) 217 1171 | GC, remodel, ADU | Moreno Valley · Riverside County | — | — |
| D & S Refrigeration And H V A C | Daniel Rodriguez Magallanes | — | (866) 488 8659 | HVAC | Corona · Riverside County | — | — |
| D - Bac Lighting And Electric INC | Baciu Samuel | — | (951) 316 7130 | Electricians | Corona · Riverside County | — | — |
| D A Richards Construction | Donald Allen Richards | — | (909) 234 7778 | GC, remodel, ADU | Cherry Valley · Riverside County | — | — |
| D And D Enterprises | Ron John Doherty | — | (951) 272 4248 | Other | Norco · Riverside County | — | — |
| D B Construction | Ballazhi Din | dave@dbconstruction.com | (760) 808 6822 | GC, remodel, ADU | Cathedral City · Riverside County | — | — |
| D B E INC | Blunk Dennis | — | (714) 799 1352 | Windows, patio, painters | Corona · Riverside County | — | — |
| D B Electric INC | Fernandez David | — | (951) 427 3400 | Electricians | Eastvale · Riverside County | — | — |
| D B Mechanical | D B Mechanical | — | (909) 262 5022 | HVAC | Riverside · Riverside County | — | — |
| D B S Electric | Douglas Bradley Steger | — | (714) 606 7833 | Electricians | Hemet · Riverside County | — | — |
| D B Savvy Unlimited Welding INC | Derrick Ramon Beckett | — | (951) 545 6020 | Other | Riverside · Riverside County | — | — |
| D Burke Mechanical Corp | Velouria Emily Anne Nguyen | sales@dburkepipe.com | (951) 279 7700 | HVAC | Norco · Riverside County | — | — |
| D C Drilling INC | Christopher Daniel Cervantes | — | (951) 368 7789 | Other | Jurupa Valley · Riverside County | — | — |
| D C Electronics INC | Andrew Leon Glenn | — | (951) 682 5962 | Electricians | Riverside · Riverside County | — | — |
| D C Enterprises | David Paul Carlson | — | (951) 212 2482 | GC, remodel, ADU | Corona · Riverside County | — | — |
| D C Garage Doors | D C Garage Doors | — | (951) 553 4335 | Other | Menifee · Riverside County | — | — |
| D C Palm Tree Company | Gregston Dale Young | — | (760) 250 1229 | Electricians | Indio · Riverside County | — | — |
| D C R Construction INC | Dennis Craig Rieger | — | (760) 394 4648 | GC, remodel, ADU | Thermal · Riverside County | — | — |
| D Corporation General Contracting And Engineering | Anthony Dominguez | — | (951) 928 0055 | GC, remodel, ADU | Nuevo · Riverside County | — | — |
| D D Flooring | D D Flooring | — | (951) 639 7031 | Other | Menifee · Riverside County | — | — |
| D D Painting INC | Robert Douglas De Oliveira | don@ddpainting.com | (760) 202 8100 | Windows, patio, painters | Palm Desert · Riverside County | — | — |
| D E Hall Construction | David Evan Hall | — | (951) 217 7047 | GC, remodel, ADU | Norco · Riverside County | — | — |
| D E Sharp Construction | David Eugene Sharp | — | (909) 795 7866 | GC, remodel, ADU | Calimesa · Riverside County | — | — |
| D F Schwartz Custom Woodworks | D F Schwartz Custom Woodworks | — | (951) 415 9500 | Other | Corona · Riverside County | — | — |