| Built Riet Construction | Allan Joseph Rietveld | — | (509) 720 4190 | GC, remodel, ADU | Running Springs · San Bernardino County | — | — |
| Built-up Modular Istallation | Built-up Modular Istallation | — | (760) 912 1302 | Other | Hesperia · San Bernardino County | — | — |
| Buiter Construction | Wayne Harry Buiter | — | (909) 797 8029 | GC, remodel, ADU | Yucaipa · San Bernardino County | — | — |
| Bull Line Electric | Hernandez Esteban | — | (562) 623 7907 | Electricians | Ontario · San Bernardino County | — | — |
| Bulldog Construction | Pardip Singh Sandhu | — | (877) 215 6904 | Other | Rancho Cucamonga · San Bernardino County | — | — |
| Bullseye Builders INC | Adam Hisham Shihadeh | — | (714) 202 4545 | GC, remodel, ADU | Chino · San Bernardino County | — | — |
| Bullseye Concrete Services INC | Trevor Lee Balander | — | (951) 464 7685 | GC, remodel, ADU | Redlands · San Bernardino County | — | — |
| Burchell Carpentry | Burchell Carpentry | — | (909) 253 8262 | Other | Yucaipa · San Bernardino County | — | — |
| Burgesons Heating And Air Conditioning INC | Todd Alan Pesta | — | (909) 792 2222 | HVAC | Redlands · San Bernardino County | — | — |
| Burke Construction | John Daniel Burke | interested@domainmarket.com | (909) 533 7903 | GC, remodel, ADU | San Bernardino · San Bernardino County | — | — |
| Burkitt's Builders | Burkitt's Builders | — | (909) 337 9528 | GC, remodel, ADU | Running Springs · San Bernardino County | — | — |
| Burner Construction Corp | Benjamin Thomas Calhoun | — | (800) 371 7903 | Electricians | Chino · San Bernardino County | — | — |
| Burnett Electric | Mark Steven Burnett | — | (909) 557 8612 | Electricians | Big Bear Lake · San Bernardino County | — | — |
| Burns Builders Services | Jeffrey Lyle Burns | — | (951) 204 4834 | Other | Chino · San Bernardino County | — | — |
| Burns Sewer & Septic Service | Paul Edward Jr Mc Clain | — | (760) 952 1749 | Other | Victorville · San Bernardino County | — | — |
| Burrtec Waste Industries INC | Tracy Ann Burr | — | (909) 429 4200 | Other | Fontana · San Bernardino County | — | — |
| Bustos Landscaping INC | Jaime Bustos | — | (909) 455 7980 | Windows, patio, painters | Montclair · San Bernardino County | — | — |
| Busy B Juarez Landscape Construction | Benjamin Chaves Juarez | — | (661) 524 1346 | Windows, patio, painters | San Bernardino · San Bernardino County | — | — |
| Butch B Electric | Birch Byron Price | — | (909) 989 3754 | Electricians | Rancho Cucamonga · San Bernardino County | — | — |
| Button Construction Incorporated | Jesse Scott Carl Button | — | (760) 881 7144 | GC, remodel, ADU | Twentynine Palms · San Bernardino County | — | — |
| Bv Electric | Beville Sebastian Lloyd | — | (909) 728 0141 | Electricians | Fontana · San Bernardino County | — | — |
| Bykowski Equipment Co | Richard Clay Largarticha | — | (909) 902 9400 | Other | Chino · San Bernardino County | — | — |
| C & A Demolition | Jose L Pastrana | — | (909) 670 7121 | Other | Rialto · San Bernardino County | — | — |
| C & C Building And Landscaping INC | Carlos Eduardo Castro | — | (909) 248 6433 | GC, remodel, ADU | Chino · San Bernardino County | — | — |
| C & F Concrete INC | Adrian Cruz | — | (909) 435 0408 | Other | Redlands · San Bernardino County | — | — |
| C & H Refrigeration | Hugo Estrada | — | (909) 549 5955 | HVAC | Fontana · San Bernardino County | — | — |
| C & J Construction | Jesus Eduardo Lugo | — | (951) 906 2511 | GC, remodel, ADU | San Bernardino · San Bernardino County | — | — |
| C & M Tree Service | Robert Eugene Carlton | — | (760) 365 5852 | Tree | Yucca Valley · San Bernardino County | — | — |
| C A Fire Protection | Carlos Efrain Avila | info@cafireprotection.com | (760) 995 1085 | Other | Victorville · San Bernardino County | — | — |
| C A Fire Services | Carlos Jr Alonzo | — | (760) 983 0003 | Other | Phelan · San Bernardino County | — | — |
| C A Hofmann Construction INC | Shanon Lee Hofmann | — | (909) 484 5888 | GC, remodel, ADU | Rancho Cucamonga · San Bernardino County | — | — |
| C A M Building Maintenance INC | Alison Diane Morales | — | (909) 606 4656 | GC, remodel, ADU | Chino Hills · San Bernardino County | — | — |
| C A N Electric | Cunningham Nathan | — | (951) 212 5097 | Electricians | Rancho Cucamonga · San Bernardino County | — | — |
| C A Rogers Construction Co | Carl Allen Rogers | — | (909) 227 7490 | GC, remodel, ADU | Redlands · San Bernardino County | — | — |
| C A S C Engineering And Consulting INC | Richard Joseph Sidor | — | (909) 783 0101 | Other | Colton · San Bernardino County | — | — |
| C A Wright Paiting | C A Wright Paiting | — | (909) 213 5226 | Windows, patio, painters | Crestline · San Bernardino County | — | — |
| C And C Edwards Construction | Christopher John D Edwards | — | (909) 647 7372 | GC, remodel, ADU | Big Bear City · San Bernardino County | — | — |
| C And C Properties | Richard Justin Coffer | — | (909) 645 7164 | GC, remodel, ADU | Redlands · San Bernardino County | — | — |
| C And E Construction | Hau Quoc Tran | — | (909) 239 0403 | GC, remodel, ADU | San Bernardino · San Bernardino County | — | — |
| C And M Fence Co | Paul Clinton Campbell | — | (760) 252 3500 | Other | Barstow · San Bernardino County | — | — |