| Designer Construction INC | Scott Stanley Cyphers | designerconstruction09@gmail.com | (818) 424 4432 | GC, remodel, ADU | Palm Desert · Riverside County | — | — |
| Desmond Young Construction | Desmond Rae Young | — | (760) 413 2651 | GC, remodel, ADU | Indian Wells · Riverside County | — | — |
| Details Custom Builders INC | Brianna Rene Bruce | — | (714) 239 5000 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Deterra Landscape | Angel Daniel De Rosas | — | (714) 348 0305 | Windows, patio, painters | Perris · Riverside County | — | — |
| Detray Drilling | Detray Drilling | — | (951) 658 9355 | Other | Winchester · Riverside County | — | — |
| Devco | Donald Allen Thomason | — | (951) 221 3633 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Devil Dog Energy | Matthew Richard Davis | info@devildogenergy.com | (949) 566 3252 | Electricians | Hemet · Riverside County | — | — |
| Devised Contractors | Rodolfo Coria Torres | p.inman@devisedcontractors.com | (951) 349 1402 | GC, remodel, ADU | San Jacinto · Riverside County | — | — |
| Devrek Corporation | Richard Edward Krome | — | (951) 694 5048 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Dew Roofing INC | Raul Jr Perez | — | (760) 327 3393 | Other roofers | Palm Springs · Riverside County | — | — |
| Dewolf Construction & Renovations | Orlando Joseph Peters | — | (760) 660 9462 | GC, remodel, ADU | Rancho Mirage · Riverside County | — | — |
| Dezert Care Landscape | Dezert Care Landscape | — | (760) 670 1149 | Windows, patio, painters | La Quinta · Riverside County | — | — |
| Df Construction | Fabian David | — | (714) 766 9490 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Dfd Construction Restoration | Dale Forest Denton | — | (951) 813 1834 | GC, remodel, ADU | Murrieta · Riverside County | — | — |
| Dg Commercial Plumbing | Brian Brady Aberegg | — | (951) 400 5060 | Other | Corona · Riverside County | — | — |
| Dg Custom Painting | Dg Custom Painting | — | (760) 870 8980 | Windows, patio, painters | Desert Hot Springs · Riverside County | — | — |
| Dg Roofing INC | Cantor Demetrio Garrido | egracie@dgroofing.com | (951) 291 3245 | Other roofers | Perris · Riverside County | — | — |
| Dga Construction INC | Anthony John Douglass | — | (951) 526 9685 | GC, remodel, ADU | Menifee · Riverside County | — | — |
| Dh Electric Power | Deivith Elmer Hernandez | — | (951) 746 0597 | Electricians | Hemet · Riverside County | — | — |
| Dhi Builds INC | Donovan Joseph Carcioppolo | — | (951) 231 2199 | GC, remodel, ADU | Murrieta · Riverside County | — | — |
| Di Carlo Drywall | Di Carlo Drywall | — | (951) 295 2750 | Other | Hemet · Riverside County | — | — |
| Di Mayo Construction | Juan Manuel Tamayo | — | (951) 990 0187 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Diablo Clean - Up INC | Abel Sandoval | — | (951) 722 9612 | Other | Romoland · Riverside County | — | — |
| Diamond Athletic Flooring | Richard Kraig Dix | — | (951) 698 0782 | Other | Murrieta · Riverside County | — | — |
| Diamond Construction & Remodeling INC | Carlos Daniel Gomez | — | (310) 619 7717 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Diamond Electric | Paul Anthony Contreras | — | (951) 396 1783 | Electricians | Riverside · Riverside County | — | — |
| Diamond Fire Protection LLC | Bryant Arias | — | (951) 579 4299 | Other | Temecula · Riverside County | — | — |
| Diamond Golf International INC | Salvador Campos Rodriguez | — | (951) 696 0426 | Windows, patio, painters | Murrieta · Riverside County | — | — |
| Diamond Grading INC | Pedro Barreto | — | (951) 200 5060 | Other | Riverside · Riverside County | — | — |
| Diamond Home Solutions | Diamond Home Solutions | — | (805) 732 7190 | GC, remodel, ADU | Canyon Lake · Riverside County | — | — |
| Diamond House Plumbing | Joshua Glen Miller | — | (800) 674 9440 | Other | Riverside · Riverside County | — | — |
| Diamond Interior & Exterior Construction INC | Carlos Alfredo Sigala | — | (951) 258 1766 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Diamond Marble And Granite | Diamond Marble And Granite | — | (714) 606 9641 | Other | Corona · Riverside County | — | — |
| Diamond Modular Homes | Delatorre Javier | — | (951) 926 7776 | Other | Winchester · Riverside County | — | — |
| Diamond Plumbing Services INC | Esteban Joel Velez | — | (951) 541 5500 | Other | Murrieta · Riverside County | — | — |
| Diamond Remodels LLC | Jonathan Richard Donato | — | (760) 848 8961 | GC, remodel, ADU | Cathedral City · Riverside County | — | — |
| Diamond Sheet Metal | Geraldine Marie Milkovits | — | (951) 255 2304 | Other | Winchester · Riverside County | — | — |
| Diamond Star Builders INC | Rocco Anthony De Luca | — | (949) 940 6009 | GC, remodel, ADU | Norco · Riverside County | — | — |
| Diamond Steel Construction INC | Alejandro Jr Rodriguez | — | (909) 841 7680 | Other | Menifee · Riverside County | — | — |
| Diamond Valley Concrete | Diamond Valley Concrete | — | (951) 852 6350 | Other | Hemet · Riverside County | — | — |