| Back To Basics | Back To Basics | — | (951) 453 3899 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Back To Eden Landscapes | Back To Eden Landscapes | backtoeden1995@gmail.com | (951) 247 1612 | Windows, patio, painters | Moreno Valley · Riverside County | — | — |
| Back To Perfection INC | Karl James Crooks | — | (760) 525 9481 | Other | Temecula · Riverside County | — | — |
| Backflow Express Certified Testing & Service | Jose G Villegas | — | (951) 634 6384 | Other | Moreno Valley · Riverside County | — | — |
| Backstrom & Son's Framing | Bryson Neil Backstrom | — | (951) 288 5356 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Bacon Construction | Gregory Michael Bacon | — | (951) 232 3156 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Badillo's Landscape Maintenance | Badillo's Landscape Maintenance | — | (760) 790 8170 | Windows, patio, painters | Hemet · Riverside County | — | — |
| Badlands | Christopher Lee Haveruk | — | (951) 894 9249 | Other | Murrieta · Riverside County | — | — |
| Baghouse And Industrial Sheet Metal Services | Todd M Cunningham | — | (951) 272 6610 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Baghouse Services INC DBA Oxidizers INC | Andy John Lefeber | — | (951) 271 3990 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Bahr Electrical Dynamics | John Robert Bahr | — | (760) 485 2301 | Electricians | La Quinta · Riverside County | — | — |
| Bahr Electrical Dynamics INC | John Robert Bahr | — | (760) 485 2301 | Electricians | La Quinta · Riverside County | — | — |
| Baily Contracting | Alexander Phillips Baily | — | (951) 255 5103 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Baja Coast Fence INC | Quintin Ulloa | — | (951) 377 6125 | Other | Quail Valley · Riverside County | — | — |
| Baja Concrete | Baja Concrete | — | (760) 250 3069 | Other | La Quinta · Riverside County | — | — |
| Baja Construction | Hector Eduardo Guajardo Delatorre | — | (951) 467 6080 | GC, remodel, ADU | Hemet · Riverside County | — | — |
| Baja HVAC Services | Bazua Federico | — | (951) 229 5153 | HVAC | Perris · Riverside County | — | — |
| Baja Landscape And Maintenance | Baja Landscape And Maintenance | — | (760) 574 5538 | Windows, patio, painters | Cathedral City · Riverside County | — | — |
| Baja Malibu Construction | Aaron Macias Padilla | — | (951) 232 3449 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Baja Paradise Pool Remodeling INC | Verdugo Bryan | — | (760) 229 0429 | Pool | Cathedral City · Riverside County | — | — |
| Baja Pool Company | Daniel Christopher Akin | — | (951) 634 4183 | Pool | Winchester · Riverside County | — | — |
| Baja Shotcrete INC | Artemio Jr Perez | — | (951) 567 6395 | Other | Moreno Valley · Riverside County | — | — |
| Baja's Construction | Guevara Eddy | — | (714) 349 6737 | GC, remodel, ADU | Wildomar · Riverside County | — | — |
| Baker Air INC | Correy Jr Baker | — | (619) 929 7458 | HVAC | Winchester · Riverside County | — | — |
| Baker Construction | Chris Alton Baker | mcgahae@bakerconstruction.com | (951) 313 9370 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Baker Electric | Timothy Clark Baker | — | (909) 223 9631 | Electricians | Norco · Riverside County | — | — |
| Baker Quality Construction | Randall Stewart Baker | — | (951) 658 1913 | GC, remodel, ADU | Hemet · Riverside County | — | — |
| Baker Roofing Corporation | Lawrence Neal Baker | — | (951) 255 7237 | Other roofers | Menifee · Riverside County | — | — |
| Baldees P Singh | Baldees P Singh | — | (951) 907 7790 | Windows, patio, painters | Eastvale · Riverside County | — | — |
| Balderas General Construction | Abraham Sergio Balderas Velasquez | — | (951) 556 0238 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Baldi Bros Incorporated | Salvatore Michael Baldi | — | (951) 843 9521 | GC, remodel, ADU | Beaumont · Riverside County | — | — |
| Bali Shores Pool Plastering INC | Antonio Jr Onsurez | — | (323) 447 7309 | Pool | Riverside · Riverside County | — | — |
| Balkan Builder | Balkan Builder | — | (951) 207 5545 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Ball Electric | Gary Scott Ball | — | (760) 323 4822 | Electricians | Palm Springs · Riverside County | — | — |
| Ballesteros Painting Company | Ruben Paul Ballesteros | — | (951) 552 5533 | Windows, patio, painters | Hemet · Riverside County | — | — |
| Balleza Painting INC | Israel Balleza | — | (877) 328 0216 | Windows, patio, painters | Riverside · Riverside County | — | — |
| Baloo Electric | Michael Stephen Burrow | — | (925) 899 0409 | Electricians | Riverside · Riverside County | — | — |
| Banderas General Contractors | Perez Lionel Banderas | — | (951) 394 3160 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Banning Air Conditioning & Heating | Peter Sean Burns | — | (951) 769 6672 | HVAC | San Jacinto · Riverside County | — | — |
| Banning Glass Mirror And Screen | Banning Glass Mirror And Screen | — | (951) 769 5836 | Windows, patio, painters | Banning · Riverside County | — | — |