| Bis Construction INC | Stephanie Jo Mc Lellan | — | (951) 738 8294 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Biss General Contracting | James Lawrence Moroni | — | (760) 636 9876 | HVAC | Bermuda Dunes · Riverside County | — | — |
| Bivens Construction | Jerry Lee Bivens | — | (760) 861 0462 | GC, remodel, ADU | Palm Desert · Riverside County | — | — |
| Biz-e-bee Plumbing & Rooter INC | Charles George Jr Balan | — | (888) 333 1976 | GC, remodel, ADU | Perris · Riverside County | — | — |
| Bj Culver Construction INC | Tyler J Culver | — | (714) 225 5366 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Bjl Painting | Bjl Painting | — | (951) 427 6453 | Windows, patio, painters | Nuevo · Riverside County | — | — |
| Bjs Construction Co INC | Lara Jaime Jimenez | — | (909) 702 6551 | GC, remodel, ADU | Jurupa Valley · Riverside County | — | — |
| Bk Systems LLC | Benjamin Thomas Kochevar | — | (951) 285 8401 | Electricians | Riverside · Riverside County | — | — |
| Bkr Builders | Bkr Builders | — | (760) 218 6714 | GC, remodel, ADU | Cathedral City · Riverside County | — | — |
| Black Diamond Asphalt | Black Diamond Asphalt | — | (951) 300 8444 | Other | Perris · Riverside County | — | — |
| Black Diamond Pools & Design | Francisco Joel Celedon | — | (760) 619 1362 | Pool | Bermuda Dunes · Riverside County | — | — |
| Black Dragon Technologies INC | Bernadette Rae Merrill | — | (951) 530 3360 | Electricians | Riverside · Riverside County | — | — |
| Black Gold Builders Group INC | Singh Ravinder | — | (760) 396 9260 | HVAC | Indio · Riverside County | — | — |
| Black Ice Heating Air Conditioning | Kalonji Najiy Law | — | (951) 638 3570 | HVAC | Corona · Riverside County | — | — |
| Black Knight Termite And Pest Control INC | Mark William Jr Lorack | — | (951) 694 8100 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Black Lantern Development LLC | James Daniel Vukosav | — | (949) 228 9911 | GC, remodel, ADU | Palm Desert · Riverside County | — | — |
| Black Sheep Electric INC | Herrera Ramirez Ruben | — | (760) 397 7481 | Electricians | Indio · Riverside County | — | — |
| Black Sheep Plumbing | Aaron Michael Crecelius | — | (760) 288 8020 | Other | Blythe · Riverside County | — | — |
| Black Top Paving | Black Top Paving | — | (408) 591 6681 | Other | Perris · Riverside County | — | — |
| Blackbox Cabinetry INC | Sergio Garcia | — | (909) 344 7787 | Other | Beaumont · Riverside County | — | — |
| Blackhawk Paving And Grading | Christopher Joseph Lucas | — | (951) 557 1769 | Other | Hemet · Riverside County | — | — |
| Blackoak Construction INC | Luis Andres Gonzalez | — | (310) 989 6808 | GC, remodel, ADU | Rancho Mirage · Riverside County | — | — |
| Blackstone Asphalt Ltd | Paul Sean Custa | — | (408) 655 4170 | Other | Perris · Riverside County | — | — |
| Blackstone Builders INC | Steven Paul Winn | interested@domainmarket.com | (951) 736 1600 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Blackstone Landscaping INC | Jorge De La Torre Herrera | — | (760) 399 7188 | Windows, patio, painters | Thousand Palms · Riverside County | — | — |
| Blackstone W M Construction | Wesley Mariano Ferreira | — | (951) 315 3116 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Blacktop Repair | Robert Steve Todorovitch | — | (209) 920 4031 | Other | Perris · Riverside County | — | — |
| Blair Grading INC | Brice William Iv Blair | — | (951) 906 3171 | Other | Riverside · Riverside County | — | — |
| Blair Heating & Air | Shawn Seth Blair | — | (760) 537 1120 | HVAC | Palm Springs · Riverside County | — | — |
| Blake Roofing INC | Blake Carlos Harrison | — | (951) 340 2600 | Other roofers | Norco · Riverside County | — | — |
| Blake Steffen | Blake Steffen | — | (951) 285 7834 | Other | Murrieta · Riverside County | — | — |
| Blakemore Plumbing | Blakemore Plumbing | — | (951) 466 8862 | Other | Temecula · Riverside County | — | — |
| Blakley Painting | Charles Edward Blakley | — | (760) 397 5592 | Windows, patio, painters | Bermuda Dunes · Riverside County | — | — |
| Blakley Painting | Blakley Painting | — | (760) 397 5592 | Windows, patio, painters | Bermuda Dunes · Riverside County | — | — |
| Blalock Electric Solar | Nicholas Alexander Blalock | — | (951) 440 0583 | Other roofers | Murrieta · Riverside County | — | — |
| Blanca's Construction Cleaning | Blanca Amarilis Morales | — | (760) 668 9644 | Other | Desert Hot Springs · Riverside County | — | — |
| Blanchard Signs Non-electrical | Kirk Allan Blanchard | — | (951) 354 5050 | Other | Riverside · Riverside County | — | — |
| Blanco Construction | Blanco Leonardo | — | (951) 250 6692 | Other | Riverside · Riverside County | — | — |
| Blas Guris | Blas Guris | — | (760) 822 9735 | GC, remodel, ADU | Indio · Riverside County | — | — |
| Blauvelt Electric | Bruce Allen Blauvelt | — | (760) 835 6858 | Electricians | Palm Springs · Riverside County | — | — |