| Bulletproof Welding | Andres Heribertho Landeros | — | (310) 972 9703 | Other | Menifee · Riverside County | — | — |
| Bullseye Boring | Timothy Frank Maloney | — | (909) 795 7594 | Other | Calimesa · Riverside County | — | — |
| Bullseye Engineering & Under Ground | Bullseye Engineering & Under Ground | — | (714) 448 9134 | Other | Corona · Riverside County | — | — |
| Bundrant Paint And Wallcovering | Bundrant Paint And Wallcovering | — | (951) 751 3554 | Windows, patio, painters | Corona · Riverside County | — | — |
| Burchett Grading INC | Craig Stewart Burchett | — | (951) 538 6424 | Other | Temecula · Riverside County | — | — |
| Burgess Office Installation | Nathan Paul Doyel | — | (951) 682 4300 | Other | Riverside · Riverside County | — | — |
| Burk's General Contracting INC | Terry Alan Burk | — | (909) 538 2826 | GC, remodel, ADU | Norco · Riverside County | — | — |
| Burke Construction | Brenton Edward Burke | interested@domainmarket.com | (951) 534 5195 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Burke Electric INC | Aaron David Burke | — | (951) 787 9800 | Electricians | Riverside · Riverside County | — | — |
| Burkett Mccallum Construction | John Robert Burkett | — | (760) 272 5065 | GC, remodel, ADU | Palm Springs · Riverside County | — | — |
| Burkhardt Construction | Anthony Wayne Burkhardt | — | (909) 519 0193 | GC, remodel, ADU | Jurupa Valley · Riverside County | — | — |
| Burkman Builder | Burkman Builder | — | (949) 294 1912 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Burl & Flitch | Aaron Mason Long | — | (442) 227 4128 | Other | Palm Desert · Riverside County | — | — |
| Burning Desire Fireplace | Steven Dale Roach | — | (714) 642 4144 | Other | Riverside · Riverside County | — | — |
| Burros Backhoe Service LLC | Mark Thomas Burros | — | (714) 313 9387 | Other | Perris · Riverside County | — | — |
| Burrow Construction | James Taylor Burrow | — | (760) 902 1737 | GC, remodel, ADU | Blythe · Riverside County | — | — |
| Burton Construction INC | Paul Gregory Burton | — | (949) 466 0312 | Electricians | Lake Elsinore · Riverside County | — | — |
| Burville Lee Richardson | Burville Lee Richardson | — | (951) 492 9624 | Other | Hemet · Riverside County | — | — |
| Bush Construction And Remodel | Audley V Greenland | — | (760) 424 9452 | GC, remodel, ADU | Palm Desert · Riverside County | — | — |
| Business Consultants And Builders | Business Consultants And Builders | — | (951) 232 3408 | GC, remodel, ADU | Hemet · Riverside County | — | — |
| Business Telecommunication Systems LLC | Mathew Wayne Irey | — | (951) 272 3100 | Other | Corona · Riverside County | — | — |
| Busy Bee Construction | Alice Elaine Sutton | contact@busy-bee-construction.com | (619) 227 6966 | GC, remodel, ADU | Wildomar · Riverside County | — | — |
| Busy Bee Electrical Enterprises | Jack J Bee | — | (951) 674 9559 | Electricians | Murrieta · Riverside County | — | — |
| Butch Baker Construction | William Robert Baker | — | (760) 564 2787 | GC, remodel, ADU | La Quinta · Riverside County | — | — |
| Butron's F. Painting INC | Rojas Rocio Flor | — | (951) 349 5221 | Windows, patio, painters | Homeland · Riverside County | — | — |
| Butterfield Construction & Electric | Ronald Craig Davis | — | (951) 302 3165 | Electricians | Temecula · Riverside County | — | — |
| Buzcor Heating & Air Conditioning | Buzcor Heating & Air Conditioning | — | (760) 224 2896 | HVAC | Temecula · Riverside County | — | — |
| Bv Legacy Construction INC | Oscar Ulises Barcenas | — | (760) 296 9929 | GC, remodel, ADU | Desert Hot Springs · Riverside County | — | — |
| Bw Commercial Builders INC | Brian Daniel Willett | — | (951) 326 9872 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Bwh Energy LLC | Wayne Matthew Thompson | — | (760) 415 7466 | HVAC | Temecula · Riverside County | — | — |
| Byers Plumbing | Brian Alan Byers | — | (951) 533 3410 | Other | Lake Elsinore · Riverside County | — | — |
| Bygg Haus LLC | James Martin Bonesteel | christian.bygghaus@gmail.com | (404) 416 3011 | GC, remodel, ADU | Palm Desert · Riverside County | — | — |
| Byron N Bishop | Byron N Bishop | — | (951) 674 1908 | GC, remodel, ADU | Wildomar · Riverside County | — | — |
| C & A Landscape INC | Marquez Adrian Munoz | — | (714) 768 3678 | Windows, patio, painters | Corona · Riverside County | — | — |
| C & B Electric | Gabriel Patrick Gonzales | — | (626) 392 2225 | Electricians | Riverside · Riverside County | — | — |
| C & D Builders And Developers INC | Delores Marie Hall-Montgomery | — | (951) 453 3900 | GC, remodel, ADU | Perris · Riverside County | — | — |
| C & D Construction Services | Conley Warren Massey | — | (951) 206 0063 | GC, remodel, ADU | Hemet · Riverside County | — | — |
| C & E Landscaping & Tree Service LLC | Rodriguez Erik Martinez | — | (951) 448 2966 | Windows, patio, painters | Moreno Valley · Riverside County | — | — |
| C & H Fuels | C & H Fuels | — | (951) 446 4563 | Other | Riverside · Riverside County | — | — |
| C & H Remodel | James Rey Hendricks | — | (760) 702 6029 | GC, remodel, ADU | Indio · Riverside County | — | — |