| B M N Floor Covering INC | Michael John Stapp | — | (909) 261 8826 | Other | Rancho Cucamonga · San Bernardino County | — | — |
| B M Quality Glass Install | B M Quality Glass Install | — | (909) 786 5399 | Windows, patio, painters | Fontana · San Bernardino County | — | — |
| B M R Construction | Bierlin Henry Reyes | — | (909) 979 0424 | GC, remodel, ADU | Fontana · San Bernardino County | — | — |
| B M Refurbishing | B M Refurbishing | — | (760) 486 5281 | GC, remodel, ADU | Hesperia · San Bernardino County | — | — |
| B O S S Construction | Scott Thomas Sipes | info@bossconstruction.com | (760) 200 6602 | GC, remodel, ADU | Yucca Valley · San Bernardino County | — | — |
| B R M Drywall | B R M Drywall | — | (951) 833 7304 | Other | Redlands · San Bernardino County | — | — |
| B R S INC | Tony Manuel Brasil | — | (909) 884 8505 | Other roofers | San Bernardino · San Bernardino County | — | — |
| B R S Roofing INC | Tony Manuel Brasil | — | (909) 884 8505 | Other roofers | San Bernardino · San Bernardino County | — | — |
| B R Tinsley INC | Bobbie Ray Tinsley | — | (760) 403 0087 | GC, remodel, ADU | Apple Valley · San Bernardino County | — | — |
| B R Tree Services. | B R Tree Services. | — | (909) 240-5544 | Tree | Crest Park · San Bernardino County | — | — |
| B T Plumbing | B T Plumbing | — | (909) 744 4303 | Other | Lake Arrowhead · San Bernardino County | — | — |
| B T U Heating & Air Conditioning | Sal Torina | — | (909) 230 0346 | HVAC | Upland · San Bernardino County | — | — |
| B Teran Electrical Contractors | Benito Everet Teran | — | (909) 529 8802 | Electricians | Chino · San Bernardino County | — | — |
| B V Construction INC | Bradley Vincent Vernaci | — | (909) 949 0360 | Other | Upland · San Bernardino County | — | — |
| B W Construction | Bradley Wayne Taylor | — | (909) 684 7416 | GC, remodel, ADU | Alta Loma · San Bernardino County | — | — |
| B W Montgomery Underground INC | Billy Wayne Montgomery | — | (760) 559 1384 | Other | Pinon Hills · San Bernardino County | — | — |
| B X D Construction | Manuel Antonio Correa | — | (626) 786 2347 | GC, remodel, ADU | Upland · San Bernardino County | — | — |
| B Z B Construction Company | Lambert Mildred | — | (909) 984 0424 | GC, remodel, ADU | Ontario · San Bernardino County | — | — |
| B&b Flooring | B&b Flooring | — | (760) 985 7816 | Other | Victorville · San Bernardino County | — | — |
| B&d Equipment Rental INC DBA B&d Equipment Rental & Engineering | George Nicholas Vernaci | — | (909) 949 0360 | Other | Upland · San Bernardino County | — | — |
| B&d Home Renovation LLC | Carl Chao Hu | — | (626) 698 8207 | Electricians | Chino · San Bernardino County | — | — |
| B&r Custom Tile | Brian Romero-Villarreal | — | (760) 265 6825 | Other | Apple Valley · San Bernardino County | — | — |
| B-81 Paving INC | Bedolla Adalberto | — | (909) 709 7954 | Other | Yucaipa · San Bernardino County | — | — |
| B3d Electric | Brendan George Dessa | — | (909) 730 0142 | Electricians | Ontario · San Bernardino County | — | — |
| Babcock Construction INC | Peter Stephen Babcock | — | (909) 481 4734 | GC, remodel, ADU | Alta Loma · San Bernardino County | — | — |
| Babin Construction | Ryan Thomas Babin | — | (909) 744 4562 | GC, remodel, ADU | Sugarloaf · San Bernardino County | — | — |
| Baca Landscape Services | Fred Jose Baca | — | (909) 268 4962 | Windows, patio, painters | Chino · San Bernardino County | — | — |
| Bacio Construction | Ernest Arriola Bacio | — | (909) 631 1527 | GC, remodel, ADU | Chino Hills · San Bernardino County | — | — |
| Backflow Brothers | Cody Isaiah Blair | — | (760) 927 5454 | Other | Victorville · San Bernardino County | — | — |
| Backyard Estates LLC | Jordan Ray Oborn | contact@backyardestates.com | (949) 662 4884 | GC, remodel, ADU | Upland · San Bernardino County | — | — |
| Bacon/wagner Excavating INC | Joseph Daniel Wagner | — | (909) 867 3417 | Other | Running Springs · San Bernardino County | — | — |
| Bacs AC Services | Bryan Alexander Castillo Santos | — | (626) 209 3641 | HVAC | Rialto · San Bernardino County | — | — |
| Bad Hombres Concrete Corp | Jose Alcala | — | (909) 630 1256 | Other | Grand Terrace · San Bernardino County | — | — |
| Badass Sheet Metal INC | Weston Charles Fagan | — | (626) 617 6306 | Other | Hesperia · San Bernardino County | — | — |
| Baeskens Construction INC | David Maurice Baeskens | — | (760) 244 0371 | GC, remodel, ADU | Hesperia · San Bernardino County | — | — |
| Bahador Behpourian | Bahador Behpourian | — | (760) 832 5064 | GC, remodel, ADU | Yucca Valley · San Bernardino County | — | — |
| Bailes Construction | Jason Donald Bailes | — | (760) 553 5930 | GC, remodel, ADU | Apple Valley · San Bernardino County | — | — |
| Bailey's Construction | Bailey Michael | — | (760) 552 3956 | Electricians | Oro Grande · San Bernardino County | — | — |
| Baja Air Tech LLC | Francisco Saenz | — | (909) 518 7225 | HVAC | Victorville · San Bernardino County | — | — |
| Baja Drywall INC | John Louis Iii Woicek | — | (760) 559 4587 | Other | Victorville · San Bernardino County | — | — |