| Brandt Group INC | Robert Brandt Lange | — | (949) 644 8229 | GC, remodel, ADU | Newport Beach · Orange County | — | — |
| Brandywine Homes | James Lee Barisic | p11creative@gmail.com | (949) 296 2400 | GC, remodel, ADU | Irvine · Orange County | — | — |
| Brandywine Residential | David Gillard Barisic | — | (949) 296 2400 | GC, remodel, ADU | Irvine · Orange County | — | — |
| Branko Lasic | Branko Lasic | — | (714) 362 5454 | Other | Huntington Beach · Orange County | — | — |
| Brannan & Son Electric INC | Dennis M Brannan | — | (714) 537 3235 | Electricians | Garden Grove · Orange County | — | — |
| Brannon's Roofing | Thomas Lowell Brannon | — | (714) 504 6704 | Other roofers | Seal Beach · Orange County | — | — |
| Branson Mechanical Remodeling | Branson Mechanical Remodeling | — | (714) 467 8687 | Other | Huntington Beach · Orange County | — | — |
| Branstrom Painting INC | Eric Arvid Branstrom | — | (949) 291 9873 | Windows, patio, painters | Rancho Mission Viejo · Orange County | — | — |
| Brash Engineering Services | Daniel Dapo Eko | — | (714) 446 0635 | Other | La Habra · Orange County | — | — |
| Brave Bird Roofing | Alex Valladares Garvall | — | (949) 774 8119 | Other roofers | Fullerton · Orange County | — | — |
| Bravi Electric INC | Lopez Alvaro | info@bravielectric.com | (562) 315 9116 | Electricians | La Habra · Orange County | — | — |
| Bravo Building Concepts | Christie Lea Bravo | — | (949) 795 0978 | Other roofers | Brea · Orange County | — | — |
| Bravo Concrete | Bravo Concrete | — | (714) 372 3896 | Other | Westminster · Orange County | — | — |
| Bravo Power Electric INC | Joel Meza | — | (714) 235 5774 | Electricians | Santa Ana · Orange County | — | — |
| Bravo Roofing INC | Rick Ralph Bravo | — | (714) 672 9061 | Other roofers | Brea · Orange County | — | — |
| Bravo Sign & Design INC | Frank Louis Fiore | — | (714) 284 0500 | Other | Anaheim · Orange County | — | — |
| Bravo's Painting Company | Diego Alfredo Bravo | — | (714) 795 7894 | Windows, patio, painters | Santa Ana · Orange County | — | — |
| Brea Awning | Brea Awning | — | (714) 572 2732 | Other | Brea · Orange County | — | — |
| Brea Electric | Richard Donald Holly | info@breaelectric.com | (714) 529 3030 | Electricians | Brea · Orange County | — | — |
| Brea Glass & Mirror INC | John Ray White | — | (714) 529 4252 | Windows, patio, painters | Brea · Orange County | — | — |
| Brea Plumbing | Donald Francis Skala | — | (714) 529 1034 | HVAC | Brea · Orange County | — | — |
| Brea Roofing | Daniel Justin Shirley | justin@brearoofing.com | (714) 879 1588 | Other roofers | Brea · Orange County | — | — |
| Breakthrough Landscape Construction | Calderon Coria Jose | — | (949) 257 7783 | Windows, patio, painters | San Juan Capistrano · Orange County | — | — |
| Breakwater Builders INC | Thomas Edward Higgs | — | (714) 342 7579 | GC, remodel, ADU | Newport Beach · Orange County | — | — |
| Breathe Easy Heating And Air Conditioning | Michael David Krening | — | (714) 713 0566 | HVAC | Mission Viejo · Orange County | — | — |
| Breeze AC Solutions | Jordan Lee Ahl | — | (951) 805 9721 | HVAC | Orange · Orange County | — | — |
| Breezy Air Services | Cory Wilhelm Elliott | info@breezyairservices.com | (714) 606 0814 | HVAC | Huntington Beach · Orange County | — | — |
| Breezy Builders INC | Arash Sayyar | — | (714) 430 0604 | GC, remodel, ADU | Irvine · Orange County | — | — |
| Breiter Construction | Keith Thomas Breiter | — | (714) 501 8213 | GC, remodel, ADU | Fountain Valley · Orange County | — | — |
| Brek Communications INC | Dennis Lund Brunning | — | (714) 939 0450 | Electricians | Orange · Orange County | — | — |
| Brekby INC | Brendon David Kirby | — | (714) 392 6598 | Other | Anaheim · Orange County | — | — |
| Brenda Nardolillo | Brenda Nardolillo | — | (714) 812 1002 | GC, remodel, ADU | Anaheim Hills · Orange County | — | — |
| Brendan Charles O'brien | Brendan Charles O'brien | — | (310) 213 0772 | Electricians | Huntington Beach · Orange County | — | — |
| Brennen O'byrne | Brennen O'byrne | — | (714) 307 1437 | GC, remodel, ADU | Irvine · Orange County | — | — |
| Brent Blake Plumbing | Brent Blake Plumbing | — | (949) 422 1071 | Other | Aliso Viejo · Orange County | — | — |
| Brent Bowers | Brent Bowers | — | (714) 350 7118 | Other | Huntington Beach · Orange County | — | — |
| Brent E Anderson | Brent E Anderson | — | (562) 500 3150 | GC, remodel, ADU | Los Alamitos · Orange County | — | — |
| Brent Engineering INC | Ronald Francis Burek | — | (949) 244 0813 | Other | Laguna Niguel · Orange County | — | — |
| Brent Kosick Wallcovering | Brent Kosick Wallcovering | — | (714) 328 6250 | Other | Huntington Beach · Orange County | — | — |
| Brent L Dix | Brent L Dix | — | (951) 217 2877 | GC, remodel, ADU | Laguna Niguel · Orange County | — | — |