| Badger Controls INC | Colby Von Shay | info@badgercontrols.com | (714) 827 5223 | Electricians | Garden Grove · Orange County | — | — |
| Badger Enterprise INC | Roy Ellie Garner | — | (714) 632 3005 | GC, remodel, ADU | Placentia · Orange County | — | — |
| Badraun Builders INC | Ronald Robert Badraun | — | (949) 305 5905 | GC, remodel, ADU | Irvine · Orange County | — | — |
| Baerg Plumbing INC | Joseph Michael Baerg | — | (949) 848 3783 | Other | Trabuco Canyon · Orange County | — | — |
| Bahman Fakhimi | Bahman Fakhimi | — | (949) 752 1885 | GC, remodel, ADU | Costa Mesa · Orange County | — | — |
| Bailey Enterprises LLC | Keith Phillip Pheifer | — | (949) 537 1005 | GC, remodel, ADU | Laguna Hills · Orange County | — | — |
| Bailon Building Improvement | Edgar Bailon | — | (657) 378 5893 | GC, remodel, ADU | La Habra · Orange County | — | — |
| Baird Electric | Kelly Richard Baird | — | (949) 837 3238 | Electricians | Mission Viejo · Orange County | — | — |
| Baiza's Roofing Corporation | Daniel Baiza | — | (714) 307 5720 | Other roofers | Westminster · Orange County | — | — |
| Baja Roofing Solutions | Victor Manuel Serrato Carrillo | — | (626) 628 5655 | Other roofers | La Habra · Orange County | — | — |
| Baker Builders | Baker Builders | — | (714) 986 6994 | GC, remodel, ADU | Placentia · Orange County | — | — |
| Baker Construction Services | Scott Allen Baker | — | (714) 952 9003 | GC, remodel, ADU | Buena Park · Orange County | — | — |
| Baker Wall Designs | Brett Hamilton Baker | — | (949) 939 8468 | Windows, patio, painters | Orange · Orange County | — | — |
| Baker Woodworking | Baker Woodworking | — | (760) 413 0904 | Other | Costa Mesa · Orange County | — | — |
| Balance Point Mechanical Hvac-r | Rhett Alexander Enciso | — | (909) 762 5363 | HVAC | Garden Grove · Orange County | — | — |
| Balbas Construction | Joseph Anthony Balbas | — | (714) 390 1177 | GC, remodel, ADU | Huntington Beach · Orange County | — | — |
| Balboa Air | Balboa Air | — | (949) 712 8811 | HVAC | Aliso Viejo · Orange County | — | — |
| Balboa Builders LLC | Rodriguez Hugo Valdez | — | (951) 368 8616 | GC, remodel, ADU | Orange · Orange County | — | — |
| Balboa Technologies INC | Dylan Gary Gormly | — | (949) 464 8450 | Other | Newport Beach · Orange County | — | — |
| Balderas Demolition INC | Balderas-diaz Abel | — | (714) 340 8108 | Other | Tustin · Orange County | — | — |
| Balderas Electric | Balderas Carlos | — | (949) 215 0238 | Electricians | Laguna Hills · Orange County | — | — |
| Balderas Plumbing | Balderas Plumbing | — | (949) 554 9825 | Other | Anaheim · Orange County | — | — |
| Baldwin & Sons INC | Shawn Michael Baldwin | — | (949) 640 8300 | GC, remodel, ADU | Newport Beach · Orange County | — | — |
| Baldwin New Homes INC | Shawn Michael Baldwin | — | (949) 640 8300 | GC, remodel, ADU | Newport Beach · Orange County | — | — |
| Balgar Pro Painting Co | Garcia Baltazar | — | (714) 865 2364 | GC, remodel, ADU | Anaheim · Orange County | — | — |
| Ball Point Construction INC | Stephen Lee Ball | — | (949) 338 9032 | GC, remodel, ADU | Laguna Beach · Orange County | — | — |
| Ballard Design Build LLC | Stephen Goodnight Ballard | — | (949) 432 1210 | GC, remodel, ADU | Newport Beach · Orange County | — | — |
| Ballast Construction | Thomas Michael Arnold | — | (707) 217 8597 | GC, remodel, ADU | Irvine · Orange County | — | — |
| Balsa Construction LLC | Robert Michael Plavajka | info@balsaconstruction.com | (949) 851 0995 | GC, remodel, ADU | Newport Beach · Orange County | — | — |
| Bam Mechanical INC DBA Orange Heating Air Conditioning And Refrig | Barry Alan Mckey | — | (714) 423 7892 | HVAC | Orange · Orange County | — | — |
| Bamaconstruction | Ordonez Eduardo Bamac | — | (562) 313 4013 | GC, remodel, ADU | La Habra · Orange County | — | — |
| Banconit Speciality Construction | Jeffrey Allan Hawlish | — | (714) 813 9208 | Electricians | Laguna Beach · Orange County | — | — |
| Band Of Bloom | Band Of Bloom | — | (951) 533 1863 | Electricians | Anaheim · Orange County | — | — |
| Bandels Painting Service | John V Bandel | — | (714) 530 0626 | Windows, patio, painters | Garden Grove · Orange County | — | — |
| Bandy Construction | Thomas Randall Bandy | — | (949) 373 6641 | GC, remodel, ADU | Dana Point · Orange County | — | — |
| Bang's Construction | Young Sic Bang | — | (213) 454 9065 | GC, remodel, ADU | Brea · Orange County | — | — |
| Bangert Construction | Bruce Charles Bangert | — | (415) 254 9739 | Electricians | Fullerton · Orange County | — | — |
| Bangert Electric INC | David Maurice Tobin | — | (714) 941 9093 | Electricians | Orange · Orange County | — | — |
| Bangert Retail Technologies North America INC | Thomas Anthony Bangert | — | (714) 941 9093 | GC, remodel, ADU | Orange · Orange County | — | — |
| Bao Le | Bao Le | — | (714) 282 2672 | GC, remodel, ADU | Orange · Orange County | — | — |