| Blue Steam Tile And Stone Restoration INC | Peter Edward Collins | — | (760) 360 4000 | Restoration | Palm Desert · Riverside County | — | — |
| Blue Sun Electric | Kelley Patrick | — | (760) 567 9888 | Electricians | Indio · Riverside County | — | — |
| Blue Tiger Heating & AC | Blue Tiger Heating & AC | — | (951) 442 0800 | HVAC | Lake Elsinore · Riverside County | — | — |
| Blue View Pool N Spa INC | Justino Ruiz | — | (442) 390 8423 | Pool | Indio · Riverside County | — | — |
| Blue Wave Energy | Christian Daniel Hernandez Ramirez | — | (951) 775 8751 | Electricians | Lake Elsinore · Riverside County | — | — |
| Bluebird Construction INC | Steve Sang Ik Kim | eric@bluebird-construction.com | (415) 424 1899 | GC, remodel, ADU | Murrieta · Riverside County | — | — |
| Bluebird Telecom INC | Jerry Douglas Goodman | — | (714) 743 8690 | Other | Lake Elsinore · Riverside County | — | — |
| Bluecoast Lowvoltagesystems INC | Javier Carranza | — | (951) 384 1014 | Other | Moreno Valley · Riverside County | — | — |
| Bluefin Plumbing INC | Ulysses Anthony Ramirez | — | (619) 736 7401 | Other | Banning · Riverside County | — | — |
| Blueprint Cleaning LLC | Richard Eugen Budeanu | — | (714) 855 5789 | Other | Riverside · Riverside County | — | — |
| Blueridge Homes | Blueridge Homes | — | (406) 580 7906 | GC, remodel, ADU | Indio · Riverside County | — | — |
| Bluetec Pool & Spa Repair | Bluetec Pool & Spa Repair | — | (760) 673 7376 | Pool | Rancho Mirage · Riverside County | — | — |
| Bm Family Glass LLC | Caudillo Hector Bonilla | bmfamilyglass@outlook.com | (949) 616 6803 | Windows, patio, painters | Lake Elsinore · Riverside County | — | — |
| Bmb Pool Construction | Bradley Thomas Gilpin | — | (951) 226 4941 | Pool | Temecula · Riverside County | — | — |
| Bmo Build Co LLC | Bradley Allen Bokath | — | (909) 560 9725 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Bmr Group INC | Mick Lee Thornborough | — | (951) 898 3939 | Electricians | Corona · Riverside County | — | — |
| Bms Mechanical | Martin Esparza | — | (760) 797 5563 | HVAC | Thermal · Riverside County | — | — |
| Bmsc Construction INC | Margarita Beltran | — | (951) 233 4859 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Bn Superior Construction | Timothy Joseph Buckhalter | — | (714) 605 6030 | GC, remodel, ADU | Menifee · Riverside County | — | — |
| Bnt Drywall INC | Robert Leslie Whitehead | — | (951) 264 2872 | Other | Riverside · Riverside County | — | — |
| Bo Plastering | Bo Plastering | — | (760) 912 8799 | Other | Temecula · Riverside County | — | — |
| Bob Bielenberg Heating & Air Conditioning | Robert Charles Bielenberg | — | (530) 559 2993 | HVAC | Palm Springs · Riverside County | — | — |
| Bob Holcomb Masonry | Bob Holcomb Masonry | — | (951) 925 1701 | GC, remodel, ADU | Hemet · Riverside County | — | — |
| Bob Mezzo Plastering | Bob Mezzo Plastering | — | (714) 675 5890 | Other | Riverside · Riverside County | — | — |
| Bob The Plumber INC | Robert Thomas Cusick | — | (951) 743 4825 | Other | Moreno Valley · Riverside County | — | — |
| Bob's Canvas INC | James William Mendoza | — | (951) 600 4980 | Other | Murrieta · Riverside County | — | — |
| Bob's Drain Cleaning & Plumbing Repair Service | Robert Hernando Calderon | — | (951) 750 8091 | Other | Riverside · Riverside County | — | — |
| Bob's Pool Service & Supply | Michael William Stalnecker | — | (951) 343 0133 | Pool | Riverside · Riverside County | — | — |
| Boban Ciolac | Boban Ciolac | — | (714) 869 4550 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Bobby Burgess | Bobby Burgess | — | (951) 214 9988 | Other | Riverside · Riverside County | — | — |
| Bobby Harris Construction | Bobby Allen Harris | — | (760) 898 4019 | GC, remodel, ADU | Murrieta · Riverside County | — | — |
| Bober Construction INC | Sean Christopher Bober | info@website.com | (909) 936 8639 | GC, remodel, ADU | Beaumont · Riverside County | — | — |
| Boberg Engineering & Contracting INC | Chad Ryan Boberg | — | (714) 993 7001 | Other | Corona · Riverside County | — | — |
| Bochun Zhang | Bochun Zhang | — | (951) 553 4216 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Boehmer Construction INC | Randy Lopez Boehmer | — | (909) 714 3932 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Bogart Masonry INC | Terry Eugene Bogart | — | (760) 363 7550 | Other | Palm Desert · Riverside County | — | — |
| Bogart Plumbing Solutions | Bogart Plumbing Solutions | — | (714) 515 0767 | Other | Corona · Riverside County | — | — |
| Bogdan Construction | Silviu Veleriu Bogdan | — | (951) 403 7939 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Bogh Construction LLC | Russell Vincent Bogh | — | (951) 845 4607 | GC, remodel, ADU | Beaumont · Riverside County | — | — |
| Bogh Engineering LLC | Russell Vincent Bogh | — | (951) 845 4607 | GC, remodel, ADU | Beaumont · Riverside County | — | — |