| Boatman's Pest Control | Boatman's Pest Control | — | (909) 475-8827 | Pest, tile roofs | San Bernardino · San Bernardino County | — | — |
| Bob Burns Construction | Robert John Burns | — | (909) 794 3101 | GC, remodel, ADU | Forest Falls · San Bernardino County | — | — |
| Bob's Cooling And Heating | Bob's Cooling And Heating | — | (760) 577 9969 | HVAC | Barstow · San Bernardino County | — | — |
| Bob's Plumbing | Bob's Plumbing | — | (951) 316 7767 | Other | Redlands · San Bernardino County | — | — |
| Bobbyblue Plumbing INC | Robert Michael Everett | bobby@bobbyblueplumbing.com | (909) 944 8999 | Other | Rancho Cucamonga · San Bernardino County | — | — |
| Bockman Window Covering Installation | Bockman Window Covering Installation | — | (951) 990 3789 | Other | Hesperia · San Bernardino County | — | — |
| Bodnars Electric | Leon David Jr Bodnar | — | (760) 713 1954 | Electricians | Apple Valley · San Bernardino County | — | — |
| Bogart Jeremy Masonry | Bogart Jeremy Masonry | — | (760) 250 5474 | Other | Yucca Valley · San Bernardino County | — | — |
| Boggs Plastering | Boggs Plastering | — | (909) 957 6777 | Other | Upland · San Bernardino County | — | — |
| Bohnstedt Construction Co | Donald Frank Bohnstedt | info@ndiscovered.com | (760) 240 3824 | GC, remodel, ADU | Apple Valley · San Bernardino County | — | — |
| Bolanos Landscaping Services | Oscar Tizoc Bolanos | — | (909) 567 4409 | Windows, patio, painters | San Bernardino · San Bernardino County | — | — |
| Bolt Electric | Robert William Bondurant | — | (909) 936 1837 | Electricians | Big Bear Lake · San Bernardino County | — | — |
| Bonafide Earthworks | Bonafide Earthworks | — | (909) 553 3555 | Other | Crestline · San Bernardino County | — | — |
| Bonanza Painting INC | Jaen Nazareth Cardenas | — | (323) 788 0329 | Windows, patio, painters | Fontana · San Bernardino County | — | — |
| Bonanza Plastering | Bonanza Plastering | — | (909) 900 8541 | Other | Rancho Cucamonga · San Bernardino County | — | — |
| Bonanza Plumbing | Raymond Todd Goldsboro | — | (951) 360 8262 | GC, remodel, ADU | Loma Linda · San Bernardino County | — | — |
| Bonilla Construction | Bonilla Douglas | impallari@gmail.com | (909) 975 0592 | GC, remodel, ADU | Ontario · San Bernardino County | — | — |
| Bonilla Equipment INC | Raymond Manuel Rodriguez | — | (562) 755 7752 | Other | Chino · San Bernardino County | — | — |
| Bontempo Painting | Bontempo Painting | — | (909) 229 8479 | Windows, patio, painters | Alta Loma · San Bernardino County | — | — |
| Boo Bears Construction | Carlos Vinicio Haro Quintero | — | (909) 553 8757 | GC, remodel, ADU | Big Bear Lake · San Bernardino County | — | — |
| Boothe Electric | Joshua Scott Boothe | — | (714) 342 9533 | Electricians | Apple Valley · San Bernardino County | — | — |
| Borden Engineering | Borden Engineering | — | (909) 578 4940 | Other | San Bernardino · San Bernardino County | — | — |
| Born 2 Roof | Born 2 Roof | — | (626) 646 3815 | Other roofers | Montclair · San Bernardino County | — | — |
| Born Again Construction | Paul Rene Moreno | — | (626) 243 6893 | GC, remodel, ADU | Montclair · San Bernardino County | — | — |
| Born Construction INC | Robert Donald Iii Gay | — | (909) 732 3132 | GC, remodel, ADU | Rancho Cucamonga · San Bernardino County | — | — |
| Borromeo Construction Contracting Corp | Leonardo Manuel Borromeo | — | (714) 390 0786 | GC, remodel, ADU | Apple Valley · San Bernardino County | — | — |
| Bos & Sons Plumbing | Ludolph Henry Jr Bos | — | (562) 230 4980 | Other | Rancho Cucamonga · San Bernardino County | — | — |
| Boss Electric | Gilbert Thomas Almeida | — | (310) 594 0603 | Electricians | Rancho Cucamonga · San Bernardino County | — | — |
| Bostani Electric | Bostani Reza | reza@bostanielectric.com | (310) 904 3309 | Electricians | Rancho Cucamonga · San Bernardino County | — | — |
| Bota Company | David Andrew Thueson | — | (708) 212 8488 | GC, remodel, ADU | Rancho Cucamonga · San Bernardino County | — | — |
| Bouchot Texture INC | Aeleen Bouchot | — | (909) 451 1459 | Other | Ontario · San Bernardino County | — | — |
| Bouma Air Conditioning & Heating INC | Denice Pauline Riezebos | — | (909) 673 1075 | HVAC | Chino · San Bernardino County | — | — |
| Boutique Property Management And Sales Group Inc. | Boutique Property Management And Sales Group Inc. | — | (657) 530-8397 | Property managers | San Bernardino · San Bernardino County | — | — |
| Bow Tie Plumbing & Rooter | William Anthony Quinones | — | (909) 804 8000 | Other | Rancho Cucamonga · San Bernardino County | — | — |
| Bower Property Management | Bower Property Management | — | (909) 717-1987 | Property managers | San Bernardino · San Bernardino County | — | — |
| Bowers Building & Development | Bowers Building & Development | — | (760) 951 2728 | GC, remodel, ADU | Helendale · San Bernardino County | — | — |
| Bowers Building Corporation | Christian Wayne Bowers | — | (760) 951 2728 | GC, remodel, ADU | Helendale · San Bernardino County | — | — |
| Bowman Electric Company | Matthew Kurt Bowman | — | (909) 788 4132 | Electricians | Upland · San Bernardino County | — | — |
| Boxcrete Construction & Design INC | Fidel Bustamante | — | (310) 819 6303 | GC, remodel, ADU | Fontana · San Bernardino County | — | — |
| Bp General Contracting | Brock Asher Pennington | — | (714) 882 9170 | GC, remodel, ADU | Barstow · San Bernardino County | — | — |