| A1 Structural Framing INC | Jose Armando Ceja | — | (747) 235 4009 | Other | Panorama City · Los Angeles County | — | — |
| A1 Superior Roofing | Silvestre Garcia | — | (424) 477 5260 | Other roofers | Torrance · Los Angeles County | — | — |
| A1 Tile | Jesus Guadalupe Pacheco | — | (323) 283 3869 | Other | Los Angeles · Los Angeles County | — | — |
| A1-perez Plumbing Electric & Pipelines | Abel Hector Perez | — | (323) 263 4343 | Electricians | Los Angeles · Los Angeles County | — | — |
| A1ex Tree Service Corp | Jazmin Monserrat Rocha | — | (626) 324 0846 | Tree | Azusa · Los Angeles County | — | — |
| A1pm Contracting INC | Vinicio Andres Vinueza | — | (626) 493 9485 | GC, remodel, ADU | La Verne · Los Angeles County | — | — |
| A1r Kare Pros | A1r Kare Pros | — | (888) 547 7330 | HVAC | Pacoima · Los Angeles County | — | — |
| A2 Construction INC | Avi Ghazaryan | — | (818) 280 4213 | GC, remodel, ADU | Glendale · Los Angeles County | — | — |
| A2 Railla Development INC | Andrew John Railla | — | (310) 260 5510 | GC, remodel, ADU | Santa Monica · Los Angeles County | — | — |
| A27 Builders INC | Artur Bagoumian | — | (818) 641 8597 | GC, remodel, ADU | Burbank · Los Angeles County | — | — |
| A2m Construction INC | George Antony Medel | — | (323) 213 7006 | GC, remodel, ADU | Monterey Park · Los Angeles County | — | — |
| A2z Builders INC | Juan Gerardo Zuniga | — | (818) 355 2343 | GC, remodel, ADU | Sherman Oaks · Los Angeles County | — | — |
| A2z Construction | Eghterafi Shahzad | — | (949) 510 7512 | GC, remodel, ADU | Cerritos · Los Angeles County | — | — |
| A2z Electric INC | Mohammad Haidarian | — | (310) 755 4860 | Electricians | Redondo Beach · Los Angeles County | — | — |
| A2z Enterprise INC | Alon Raphael Marom | — | (818) 626 7440 | Electricians | Encino · Los Angeles County | — | — |
| A2z-remodeler LLC | Steve Ataei | — | (818) 536 1510 | GC, remodel, ADU | Woodland Hills · Los Angeles County | — | — |
| A2zhome Remodel & Restoration | Bassem Hajar | — | (310) 373 7877 | GC, remodel, ADU | Torrance · Los Angeles County | — | — |
| A3 Tech Solutions | A3 Tech Solutions | — | (844) 930 1227 | Other | Van Nuys · Los Angeles County | — | — |
| A3 Visual | Joseph Michael Flannery | — | (310) 836 3200 | Other | Los Angeles · Los Angeles County | — | — |
| A5 Design Build INC | Abrahim Aide Asmaiel | — | (626) 691 8399 | GC, remodel, ADU | Alhambra · Los Angeles County | — | — |
| A6 Plumbing INC | Juan Manuel Alvarez | — | (818) 357 7019 | Other | Saugus · Los Angeles County | — | — |
| Aa All Pro Construction INC | Alejandro Canales | — | (310) 938 0794 | GC, remodel, ADU | Rolling Hills Estates · Los Angeles County | — | — |
| Aa All Pro Construction LLC | Jesus Alejandro Canales | — | (310) 938 0794 | GC, remodel, ADU | Rolling Hills Estates · Los Angeles County | — | — |
| Aa Blue Line Plumbing INC | Oren Ofir | — | (818) 571 1140 | Other | Encino · Los Angeles County | — | — |
| Aa Cabinetry INC | Lei Zhang | — | (626) 217 5451 | Other | Pomona · Los Angeles County | — | — |
| Aa Cali Construction | Alanis Omar Alzate | — | (661) 317 7920 | Other | Woodland Hills · Los Angeles County | — | — |
| Aa Cedar Construction | Ahmed Yassine | — | (626) 856 9576 | GC, remodel, ADU | La Verne · Los Angeles County | — | — |
| Aa Construction Builders INC | Ariel Alatorre | — | (323) 317 2025 | GC, remodel, ADU | Paramount · Los Angeles County | — | — |
| Aa Detailed Wood Floors INC | Ingrid Jeannette Bautista | — | (323) 388 7293 | Other | Los Angeles · Los Angeles County | — | — |
| Aa Development INC | Thomas Michael Ventimiglio | — | (917) 714 0018 | GC, remodel, ADU | Los Angeles · Los Angeles County | — | — |
| Aa Express Electric INC | Khachik Avagyan | — | (800) 836 8858 | Electricians | Burbank · Los Angeles County | — | — |
| Aa Millennium Glass | Luis Alexander Mendizabal Corado | — | (818) 217 5885 | Windows, patio, painters | Mission Hills · Los Angeles County | — | — |
| Aa Modern General Contractors INC | Keshishian Rouben | — | (818) 913 5436 | GC, remodel, ADU | Sun Valley · Los Angeles County | — | — |
| Aa To Zz Construction | David Vinnon Thorne | — | (818) 481 9287 | GC, remodel, ADU | Sylmar · Los Angeles County | — | — |
| Aa Twin Brothers Plumbing Corp | George Bethel Iii Veal | — | (310) 908 9324 | GC, remodel, ADU | Los Angeles · Los Angeles County | — | — |
| Aa1 Graphics & Signs | Artik Avanessians | — | (818) 545 7360 | GC, remodel, ADU | Glendale · Los Angeles County | — | — |
| Aaa Builder INC | Karen Su | — | (626) 350 8181 | Electricians | El Monte · Los Angeles County | — | — |
| Aaa Construction Pros INC | Amir Makki Safay | — | (949) 929 7835 | GC, remodel, ADU | Reseda · Los Angeles County | — | — |
| Aaa Electrical Enterprises INC DBA Aaa Calvert | Jason Aaron Thomas | — | (562) 429 1546 | HVAC | Long Beach · Los Angeles County | — | — |
| Aaa Electronics | Aaa Electronics | — | (818) 233 0202 | GC, remodel, ADU | Woodland Hills · Los Angeles County | — | — |