| A Martinez Construction | Martinez Alfred | — | (323) 270 0222 | GC, remodel, ADU | Los Angeles · Los Angeles County | — | — |
| A Max Plumbing LLC | Ashraf S Salama | — | (800) 944 4788 | Other | Bellflower · Los Angeles County | — | — |
| A Morales Construction | Melvin Antonio Morales | — | (626) 422 9236 | GC, remodel, ADU | La Puente · Los Angeles County | — | — |
| A More Electric | Dubo Moreno Andres | — | (818) 518 8942 | Electricians | Northridge · Los Angeles County | — | — |
| A N C Lighting INC | Romero Joel Medina | manager@anclighting.com | (323) 385 7177 | Electricians | Los Angeles · Los Angeles County | — | — |
| A N M Construction | Schwaigerlehner Andreas | — | (818) 664 8414 | GC, remodel, ADU | Montrose · Los Angeles County | — | — |
| A N M Construction & Engineering | Abraham Nathan Martinez | — | (661) 729 6200 | Other | Lancaster · Los Angeles County | — | — |
| A N N Contractors | Abdallah Nassim Nabbout | — | (562) 572 8342 | GC, remodel, ADU | La Habra Heights · Los Angeles County | — | — |
| A N R Industries INC | Agustin Nava Rodriguez | — | (323) 557 1400 | GC, remodel, ADU | Los Angeles · Los Angeles County | — | — |
| A N R Roofing | Andres Jr Chavez | — | (323) 982 9505 | Other roofers | Los Angeles · Los Angeles County | — | — |
| A N U Construction Group | Lee Daniel | — | (626) 230 3977 | GC, remodel, ADU | Monterey Park · Los Angeles County | — | — |
| A Nail At A Time Construction | Ramos Ricardo | — | (323) 855 2131 | GC, remodel, ADU | El Monte · Los Angeles County | — | — |
| A New Look Custom | A New Look Custom | — | (213) 864 1531 | GC, remodel, ADU | Los Angeles · Los Angeles County | — | — |
| A O Construction Clean Up INC | Antonio Aguayo Ornelas | — | (818) 612 8847 | Other | Valencia · Los Angeles County | — | — |
| A O L Heating & Air INC | Anjel Avraham | — | (818) 705 0000 | HVAC | Chatsworth · Los Angeles County | — | — |
| A Ortega Construction | Ortega Lopez Abelardo | — | (714) 388 0034 | GC, remodel, ADU | Hawaiian Gardens · Los Angeles County | — | — |
| A P 1 Leak Detection INC | Joe Luis| Aguilar-saldana Jose L Aguilar | — | (818) 675 2135 | Pool | Canyon Country · Los Angeles County | — | — |
| A P A General Building Construction | Ashot Petrosyan | — | (818) 482 3815 | GC, remodel, ADU | Sun Valley · Los Angeles County | — | — |
| A P American Construction Co | Perez-najera Angel | — | (818) 581 1285 | GC, remodel, ADU | Canoga Park · Los Angeles County | — | — |
| A P Construction | Pazols Patricio | — | (310) 714 3984 | GC, remodel, ADU | Marina Del Rey · Los Angeles County | — | — |
| A P F INC | Marco Antonio Altamirano | — | (818) 317 6042 | Other | Chatsworth · Los Angeles County | — | — |
| A P I Plumber Contractors INC | Rafael Jr Aguilar | — | (562) 315 9665 | Other | Whittier · Los Angeles County | — | — |
| A P M Maintenance & Construction | Gary Steven Wingett | — | (714) 315 3667 | GC, remodel, ADU | Whittier · Los Angeles County | — | — |
| A P Plumbing | A P Plumbing | — | (323) 939 1633 | Other | Los Angeles · Los Angeles County | — | — |
| A P Plumbing Co | Albert Ronald Perez | — | (818) 335 7590 | GC, remodel, ADU | North Hills · Los Angeles County | — | — |
| A P R Roofing | Michael Brian Ayala | andre@aprroofing.com | (661) 406 7475 | Other roofers | Lancaster · Los Angeles County | — | — |
| A P S Contracting INC | Alex Philippe Shipp | — | (310) 897 7606 | GC, remodel, ADU | Rancho Palos Verdes · Los Angeles County | — | — |
| A P S General Construction INC | Anthony Paul Smets | — | (818) 266 9451 | GC, remodel, ADU | Granada Hills · Los Angeles County | — | — |
| A P S Security Systems INC | Aaron Micah Hoffman | — | (818) 887 7089 | Electricians | West Hills · Los Angeles County | — | — |
| A P W Builders INC | Abraham Taniel Bosnoyan | — | (818) 982 4279 | GC, remodel, ADU | North Hollywood · Los Angeles County | — | — |
| A P Whiteley | A P Whiteley | — | (310) 980 3277 | Other | Culver City · Los Angeles County | — | — |
| A P Z Landscaping | A P Z Landscaping | — | (909) 766 5797 | Windows, patio, painters | Pomona · Los Angeles County | — | — |
| A Perfect Vision Remodeling INC | Shelley Dekel | — | (323) 839 0504 | GC, remodel, ADU | North Hollywood · Los Angeles County | — | — |
| A Piece Of Work Construction | Gavin Brent Owens | — | (310) 418 5322 | GC, remodel, ADU | Burbank · Los Angeles County | — | — |
| A Pine Plumbing Co | Christian Trevor Hand | — | (909) 599 5950 | Other | Covina · Los Angeles County | — | — |
| A Plus A Electric INC | Azaryan Aram | — | (818) 726 4813 | Electricians | Sun Valley · Los Angeles County | — | — |
| A Plus Advanced Tinting INC | Sergio Humberto Sanabria | — | (310) 889 4591 | Other | Whittier · Los Angeles County | — | — |
| A Plus Air Corp | Seunghyeog Yug | — | (416) 213-0303 | HVAC | La Crescenta · Los Angeles County | — | — |
| A Plus Cabinetry Solutions INC | Aviv Azal | — | (818) 430 5326 | Other | Canoga Park · Los Angeles County | — | — |
| A Plus Construction | Gallegos Aquino David | — | (323) 680 9646 | GC, remodel, ADU | Los Angeles · Los Angeles County | — | — |