| B And D Roofing Construction | Deborah Ann Chitwood | — | (951) 354 6640 | Other roofers | Riverside · Riverside County | — | — |
| B B B Electric | Gustavo Jesus Flores | — | (323) 674 6181 | Electricians | Hemet · Riverside County | — | — |
| B B Flooring | B B Flooring | — | (951) 265 1997 | Other | Hemet · Riverside County | — | — |
| B C A L Construction INC | Marlaina Marie Mcgowan | christopher@bcalconstruction.com | (909) 268 2294 | GC, remodel, ADU | Murrieta · Riverside County | — | — |
| B C B Construction And Investments INC | Balan Daniela | — | (678) 725 0639 | GC, remodel, ADU | Corona · Riverside County | — | — |
| B C C | B C C | — | (951) 775 3125 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| B C C Contracting INC | Shawn Lewis Jenkins | info@bcccontracting.com | (951) 870 0304 | GC, remodel, ADU | Corona · Riverside County | — | — |
| B C Construction | Robert Lee Craig | — | (909) 997 2626 | GC, remodel, ADU | Mira Loma · Riverside County | — | — |
| B C D Industries Corp | Juan Alfredo Briseno | j.briseno@bcd-industries.com | (760) 927 8988 | GC, remodel, ADU | Moreno Valley · Riverside County | — | — |
| B C Hilt | B C Hilt | — | (951) 544 0324 | GC, remodel, ADU | Desert Hot Springs · Riverside County | — | — |
| B C Telecom INC | Sherman Joseph Ii Breaux | — | (951) 722 6555 | Other | Moreno Valley · Riverside County | — | — |
| B D M Fabrication & HVAC | Brian David Maw | — | (951) 339 8970 | HVAC | Corona · Riverside County | — | — |
| B D Mechanical INC | Jesse Macias | — | (909) 890 8957 | Other | Riverside · Riverside County | — | — |
| B E Construction | Brandon Christopher Easley | — | (951) 664 6299 | GC, remodel, ADU | Menifee · Riverside County | — | — |
| B Electric | Brandon Alan Jeffries | info@belectric.com | (951) 906 7691 | Electricians | Riverside · Riverside County | — | — |
| B G Electric | Brian Edward Grieb | sales@bgelectric.com | (760) 772 2603 | Electricians | Bermuda Dunes · Riverside County | — | — |
| B G L Services | Ray Francis Barry | — | (310) 890 5749 | Windows, patio, painters | Palm Desert · Riverside County | — | — |
| B J Windows & Doors DBA B J Windows | Urias Zalatiel Juarez Perez | — | (714) 733 0059 | Windows, patio, painters | Lake Elsinore · Riverside County | — | — |
| B Kool | B Kool | — | (949) 295 6653 | HVAC | Lake Elsinore · Riverside County | — | — |
| B L Wilson Backhoe Service | Brice Lee Wilson | — | (760) 347 6946 | Other | Indio · Riverside County | — | — |
| B P Cabinets INC | Benedicto Aguirre Perez | — | (951) 275 5220 | Other | Riverside · Riverside County | — | — |
| B P Contractors INC | Esteban Chavez | — | (818) 261 3100 | GC, remodel, ADU | Jurupa Valley · Riverside County | — | — |
| B R C Consturction | B R C Consturction | — | (760) 277 8925 | GC, remodel, ADU | Palm Desert · Riverside County | — | — |
| B R Plumbing | B R Plumbing | — | (760) 396 8576 | Other | Thermal · Riverside County | — | — |
| B S A Production Framing INC | Scott Walter Anderson | — | (951) 637 7554 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| B T C Electrical Services | Brian Theodore Carlstrom | — | (951) 733 6555 | Electricians | Mira Loma · Riverside County | — | — |
| B W Structural INC | Karl Raymond Benefiel | — | (310) 968 3415 | Other | Norco · Riverside County | — | — |
| B Z Roof'n | B Z Roof'n | — | (562) 243 4455 | Other roofers | Wildomar · Riverside County | — | — |
| B&bd Septic Service | Brant Richard Devey | — | (951) 813 9427 | Other | Murrieta · Riverside County | — | — |
| B&l Painting INC | Leonardo Javier Ramirez | — | (843) 424 8265 | Windows, patio, painters | Desert Hot Springs · Riverside County | — | — |
| B21 Construction | Raul Ernesto Bernal | — | (951) 391 3861 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| B7 Construction INC | Brett Ryan Gutierrez | — | (310) 466 2289 | Electricians | Temecula · Riverside County | — | — |
| Ba Electric | Victor Alfonso Beltran | awilson@baelectric.com | (760) 848 3162 | Electricians | Indio · Riverside County | — | — |
| Ba Wagner Construction | Blayne Albert Wagner | — | (760) 930 9966 | GC, remodel, ADU | Winchester · Riverside County | — | — |
| Bac Flooring INC | Cruz Orta Cirilo | — | (909) 908 2685 | Other | Jurupa Valley · Riverside County | — | — |
| Bachelier & Sons Masonry | Victoria Sue Bachelier | — | (951) 712 3209 | Other | Riverside · Riverside County | — | — |
| Bacher Electric INC | Norman Lee Bacher | — | (951) 258 5430 | Electricians | Lake Elsinore · Riverside County | — | — |
| Bachman Tile INC | Christopher Joseph Bachman | — | (760) 619 7935 | Other | La Quinta · Riverside County | — | — |
| Bacilio Communications INC | Vicente Jr Bacilio | — | (951) 415 5081 | Other | Riverside · Riverside County | — | — |
| Back Nine Greens INC | Dominic John Nappi | — | (760) 345 8008 | Windows, patio, painters | Palm Desert · Riverside County | — | — |