| Barry Negria Painting | Barry Negria Painting | — | (909) 641 7582 | Windows, patio, painters | Victorville · San Bernardino County | — | — |
| Barstow Glass & Mirror | Reyes Agustin | — | (760) 256 1111 | Windows, patio, painters | Barstow · San Bernardino County | — | — |
| Barton Construction Services | Charles Blaine Barton | — | (760) 953 0958 | GC, remodel, ADU | Phelan · San Bernardino County | — | — |
| Barton's Concrete Cutting & Coring | Barton's Concrete Cutting & Coring | — | (760) 985 6562 | Other | Hesperia · San Bernardino County | — | — |
| Barwick Electric | Adam Jacob Barwick | — | (909) 241 5999 | Electricians | Upland · San Bernardino County | — | — |
| Barwick Electric INC | Adam Jacob Barwick | — | (909) 241 5999 | Electricians | Upland · San Bernardino County | — | — |
| Basco Construction Services INC | Ronald Winston Baskett | info@bascoconstructionservices.com | (909) 963-0304 | Electricians | San Bernardino · San Bernardino County | — | — |
| Baseline Electric Co | James Vincent Spiotto | — | (909) 395 6454 | Electricians | Upland · San Bernardino County | — | — |
| Baseline Heating And Air Conditioning INC | Noel Ahumada | — | (877) 365 4822 | HVAC | Rialto · San Bernardino County | — | — |
| Basic General Doors INC | Benjamin Alejandro Lopez | — | (909) 565 9101 | Other | Colton · San Bernardino County | — | — |
| Battista's Custom Painting | Battista's Custom Painting | — | (760) 885 1407 | Windows, patio, painters | Apple Valley · San Bernardino County | — | — |
| Batts Construction | Richard Wayne Batts | — | (909) 585 4663 | GC, remodel, ADU | Big Bear Lake · San Bernardino County | — | — |
| Batz Electrical | Fredy Jacobo Batz | — | (323) 640 7703 | Electricians | Rialto · San Bernardino County | — | — |
| Baugh Painting | Baugh Painting | — | (909) 240 5270 | GC, remodel, ADU | Rancho Cucamonga · San Bernardino County | — | — |
| Baumann Waterworks | Anthony Paul Baumann | — | (909) 319 1015 | Other | Ontario · San Bernardino County | — | — |
| Bautista Construction | Carlos Enrique Bautista Hernandez | admin@bautista-construction.com | (909) 273 3681 | GC, remodel, ADU | Crestline · San Bernardino County | — | — |
| Bayside Heating & Air Cond | Bayside Heating & Air Cond | — | (909) 919 6121 | HVAC | Rancho Cucamonga · San Bernardino County | — | — |
| Baywood Construction Co | Daniel Ernest Desautels | — | (909) 556 3764 | GC, remodel, ADU | Ontario · San Bernardino County | — | — |
| Baz Technology | Baz Technology | info@indiantypefoundry.com | (909) 609 1500 | Other | Fontana · San Bernardino County | — | — |
| Bazam Glass & Mirror | Jorge Alejandro Bayardo Zamora | — | (682) 706 2003 | Windows, patio, painters | San Bernardino · San Bernardino County | — | — |
| Bazan Landscape Services | Enrique Alvarez Bazan | — | (760) 559 2838 | Windows, patio, painters | Apple Valley · San Bernardino County | — | — |
| Bazarr Acquisitions INC | Rini Nuryani Azar | — | (909) 969 4804 | GC, remodel, ADU | Rancho Cucamonga · San Bernardino County | — | — |
| Baze - Built Homes INC | Larry Dean Baziak | — | (760) 403 0326 | GC, remodel, ADU | Apple Valley · San Bernardino County | — | — |
| Baze Built Construction | Brock Anthony Baziak | — | (760) 403 0324 | GC, remodel, ADU | Victorville · San Bernardino County | — | — |
| Bbb Demolition INC | Benjamin Ortiz | — | (213) 216 4181 | Other | Upland · San Bernardino County | — | — |
| Bc Controls And Design DBA Bc Controls | Benjamin Louis Cordasco | — | (909) 881 3381 | Electricians | San Bernardino · San Bernardino County | — | — |
| Bc7 Construction INC | Wenbin Chen | — | (626) 340 9980 | GC, remodel, ADU | Ontario · San Bernardino County | — | — |
| Bcb Construction INC | Anthony Patrick Ramirez | — | (909) 910 8306 | GC, remodel, ADU | Rancho Cucamonga · San Bernardino County | — | — |
| Bcbc Construction | Byron Roberto Ceron | — | (909) 358 9833 | GC, remodel, ADU | Ontario · San Bernardino County | — | — |
| Bcent INC | Correa Daniel | — | (909) 704 4929 | Other | Chino · San Bernardino County | — | — |
| Bcm Electric | Michael Bermudez | — | (909) 342 4598 | Electricians | San Bernardino · San Bernardino County | — | — |
| Bcm Group INC | William Carl Sterling | — | (909) 527 3820 | HVAC | Rancho Cucamonga · San Bernardino County | — | — |
| Beal H V A C | Beal H V A C | — | (909) 631 9296 | HVAC | Chino · San Bernardino County | — | — |
| Beam Construction | Lonny Ray Beam | — | (760) 953 8419 | GC, remodel, ADU | Hesperia · San Bernardino County | — | — |
| Beaman Brothers Plumbing Heating & Air | Luis Enrique Vega Elizondo | — | (760) 245 5557 | HVAC | Victorville · San Bernardino County | — | — |
| Bear City Glass Company Incorporated | Jeannie Marie Antes | — | (909) 585 2037 | Windows, patio, painters | Big Bear City · San Bernardino County | — | — |
| Bear Construction | Jose Trinidad Estrada | — | (909) 725 6755 | GC, remodel, ADU | Big Bear Lake · San Bernardino County | — | — |
| Bear Electric And Construction | Alfredo Phillip Morales | — | (760) 243 4273 | Electricians | Victorville · San Bernardino County | — | — |
| Bear Painting | Enrique Mendoza-Nava | — | (909) 486 1477 | Windows, patio, painters | Big Bear Lake · San Bernardino County | — | — |
| Bear Painting | Bear Painting | — | (909) 260 7756 | Windows, patio, painters | Chino Hills · San Bernardino County | — | — |