| Blazing Structure Steel INC | Kyung Bok Yoon | — | (951) 727 8885 | Other | Riverside · Riverside County | — | — |
| Bld Builders INC | Donald Gene Ii Webb | — | (951) 990 9067 | GC, remodel, ADU | Murrieta · Riverside County | — | — |
| Blest Builders INC | Joshua Lee Brunette | — | (714) 273 1187 | GC, remodel, ADU | Canyon Lake · Riverside County | — | — |
| Bleu Stone Pavers | Peter Alfred Mack | — | (951) 244 5900 | Other | Lake Elsinore · Riverside County | — | — |
| Blind Depot | Blind Depot | — | (951) 738 1937 | Other | Corona · Riverside County | — | — |
| Blm Shower Glass And Windows | Blm Shower Glass And Windows | — | (951) 397 6945 | Windows, patio, painters | Sun City · Riverside County | — | — |
| Bloch Development Company INC | Christopher Coleman Bloch | — | (760) 200 7097 | GC, remodel, ADU | Indio · Riverside County | — | — |
| Blown Away William | Blown Away William | — | (760) 413 5391 | Other | Indian Wells · Riverside County | — | — |
| Bls Construction | Bennett Lee Jr Sperber | — | (760) 423 8205 | GC, remodel, ADU | Rancho Mirage · Riverside County | — | — |
| Blu Landscape | Blu Landscape | — | (951) 432 6155 | Windows, patio, painters | Norco · Riverside County | — | — |
| Blue Agave Landscape | Blue Agave Landscape | — | (760) 609 3077 | Windows, patio, painters | La Quinta · Riverside County | — | — |
| Blue Agave Landscape Construction | Jose Olivares Garcia | — | (951) 775 2064 | Windows, patio, painters | Menifee · Riverside County | — | — |
| Blue Anchor Visions | Balazs G Moldovan | — | (858) 522-9333 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Blue Bee Landscape INC | Fabian Ortega | — | (951) 345 9722 | Windows, patio, painters | Hemet · Riverside County | — | — |
| Blue Bird Climate Solutions INC | Vitalii Kaiia | — | (949) 331 4721 | HVAC | Murrieta · Riverside County | — | — |
| Blue Creek Water Products | Blue Creek Water Products | — | (951) 473 5652 | Other | Lake Elsinore · Riverside County | — | — |
| Blue Desert Pool Service INC | Carlos Joaquin Heras | — | (760) 600 1420 | Pool | Indio · Riverside County | — | — |
| Blue Diamond Carpets And Flooring INC | Kenneth Oral Jr Buis | — | (951) 830 1269 | Other | Riverside · Riverside County | — | — |
| Blue Diamond Energy Builders DBA Blue Diamond Restoration | Rhonda Nicole Weltmer | — | (855) 951 7652 | GC, remodel, ADU | Murrieta · Riverside County | — | — |
| Blue Diamond General Contractor | Blue Diamond General Contractor | — | (951) 813 6673 | GC, remodel, ADU | Murrieta · Riverside County | — | — |
| Blue Dog Renovations LLC | Kenneth Charles Sr Collins | — | (562) 519 4698 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Blue Dream Painting | Kil Sun Lee | — | (760) 912 1006 | Windows, patio, painters | Moreno Valley · Riverside County | — | — |
| Blue Dream Pools & Spas Corporation | Javier Arturo Perez Raygada | — | (760) 610 3435 | Pool | Palm Desert · Riverside County | — | — |
| Blue Drywall Construction | Jesus Manuel Gutierrez | — | (951) 826 0199 | Other | Riverside · Riverside County | — | — |
| Blue Electric | Vasquez Jesse | — | (760) 702 8638 | Electricians | Mecca · Riverside County | — | — |
| Blue Empire Fence | Blue Empire Fence | — | (562) 676 8339 | Other | Moreno Valley · Riverside County | — | — |
| Blue Fin Construction LLC | Michael R Ramirez | — | (760) 464 1320 | GC, remodel, ADU | Coachella · Riverside County | — | — |
| Blue Haven Pools & Spas | Yukary Thanairy Pardo | — | (951) 400 5494 | Pool | Temecula · Riverside County | — | — |
| Blue Horizon Woodworks | Eduardo Bailon | — | (951) 515 2861 | Other | Riverside · Riverside County | — | — |
| Blue Horizons Contracting INC | Jeffrey Daniel Becker | astigma@astigmatic.com | (760) 468 0905 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Blue Laguna Pools & Spas | Juan Pedro Robles De Landa | — | (760) 660 7325 | Pool | Desert Hot Springs · Riverside County | — | — |
| Blue Legacy Pools LLC | Holguin Francisco Mascorro | — | (760) 219 9208 | Pool | La Quinta · Riverside County | — | — |
| Blue Line Electrical INC | Daniel Mendoza | — | (951) 400 9673 | Electricians | Homeland · Riverside County | — | — |
| Blue Line HVAC | Brandon William Klecker | — | (760) 218 5723 | HVAC | Thousand Palms · Riverside County | — | — |
| Blue Mountain Construction INC | Brian Carl Mercer | — | (714) 476 1533 | GC, remodel, ADU | Perris · Riverside County | — | — |
| Blue Pacific Pools INC DBA Blue Pacific Construction | Steven Eugene Vukovich | — | (951) 603 4572 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Blue Palm Landscape | Blue Palm Landscape | — | (760) 320 5103 | Windows, patio, painters | Palm Springs · Riverside County | — | — |
| Blue Point Electric INC | Daniel Preston Barrs | — | (951) 679 0090 | Electricians | Menifee · Riverside County | — | — |
| Blue Sky Landscape Corp | Patricia Chavez | — | (760) 272 4012 | Windows, patio, painters | Desert Hot Springs · Riverside County | — | — |
| Blue Sky Quality Panting INC | Nestor Eduardo Santos Rodriguez | — | (914) 330 0204 | Windows, patio, painters | Murrieta · Riverside County | — | — |