| A B Construction | Aaron Jan Bautista | — | (310) 420 2447 | GC, remodel, ADU | Culver City · Los Angeles County | — | — |
| A B Construction | Frank David Armendarez | — | (310) 591 4543 | GC, remodel, ADU | Los Angeles · Los Angeles County | — | — |
| A B Construction Co | Mike Alvarez | — | (818) 335 9656 | GC, remodel, ADU | Arleta · Los Angeles County | — | — |
| A B Contractors And Handyman INC | Andy Quoc Banh | — | (626) 898 2895 | GC, remodel, ADU | Monterey Park · Los Angeles County | — | — |
| A B E Plumbing Heating & Air | Freda Simchoni | — | (818) 761 8599 | HVAC | North Hollywood · Los Angeles County | — | — |
| A B Electronics INC | Nathan Haim Shavit | — | (818) 992 6217 | Electricians | Los Angeles · Los Angeles County | — | — |
| A B Expert Construction & Remodeling INC | Jose Abraham Oceguera | — | (818) 268 6373 | GC, remodel, ADU | Sylmar · Los Angeles County | — | — |
| A B F American Construction Group INC | Farhad Farzan-Kashani | — | (818) 457 2114 | GC, remodel, ADU | Reseda · Los Angeles County | — | — |
| A B Fire Protection INC | Jairo Valentin Orozco Perez | — | (323) 590 3941 | Other | Los Angeles · Los Angeles County | — | — |
| A B G Plumbing & Rooter | Garcia Arturo | — | (310) 392 4426 | Other | Reseda · Los Angeles County | — | — |
| A B H Construction And Maintenance | George Singardi Hovsepian | — | (818) 522 6352 | GC, remodel, ADU | Sunland · Los Angeles County | — | — |
| A B I Construction & Electric INC | Abi| Motamedi Abolfazl Motamedi | — | (310) 985 0850 | Electricians | Los Angeles · Los Angeles County | — | — |
| A B O Electric | Eskandari Abram | — | (818) 404 6181 | Electricians | Palmdale · Los Angeles County | — | — |
| A B Padilla's Electric INC | Jose Antonio Villegas | — | (310) 908 3901 | Electricians | Lynwood · Los Angeles County | — | — |
| A B Painting Co INC | Baruch Amnon | — | (323) 974 7006 | Windows, patio, painters | Los Angeles · Los Angeles County | — | — |
| A B Plumbing & Heating INC | Andrew Varga | — | (323) 788 8413 | HVAC | West Hollywood · Los Angeles County | — | — |
| A B S Construction | Scott Allen Gorman | — | (818) 822 8775 | GC, remodel, ADU | Agoura Hills · Los Angeles County | — | — |
| A B S Construction Group INC | Edgar William Flores | — | (310) 861 9974 | GC, remodel, ADU | Beverly Hills · Los Angeles County | — | — |
| A B S Shoring INC | Arash Soleimany | — | (310) 444 9994 | GC, remodel, ADU | Van Nuys · Los Angeles County | — | — |
| A B Stone & Tile Company | Bernal Toma Andres | — | (818) 799 4399 | Other | Sylmar · Los Angeles County | — | — |
| A B T Plumbing And Rooter | Robert John Titus | — | (310) 863 0577 | Other | Rancho Palos Verdes · Los Angeles County | — | — |
| A Beautiful Finish INC | Paul Eric Rinehart | — | (323) 864 5511 | Other | Glendale · Los Angeles County | — | — |
| A Better Cabinet | A Better Cabinet | — | (562) 619 3981 | Other | La Mirada · Los Angeles County | — | — |
| A Better Deal INC | Somchai Samanukorn | — | (818) 606 7955 | HVAC | Chatsworth · Los Angeles County | — | — |
| A Bevinetto Const | A Bevinetto Const | — | (818) 261 1332 | GC, remodel, ADU | Woodland Hills · Los Angeles County | — | — |
| A Bright Idea Electric | Juan Carlos Pulido | — | (310) 420 3908 | Electricians | Lakewood · Los Angeles County | — | — |
| A Broad Builder INC | Jennifer Lynn Gutierrez | — | (562) 639 8344 | GC, remodel, ADU | Whittier · Los Angeles County | — | — |
| A Bundchi Electrical Company | Bunduchi Aurel | — | (818) 434 7848 | Electricians | Reseda · Los Angeles County | — | — |
| A C - D C Automation INC | Sergio Ruben Aranda | — | (818) 723 8187 | Electricians | Burbank · Los Angeles County | — | — |
| A C Construction | Castillo Alfredo | — | (562) 355 7272 | GC, remodel, ADU | Norwalk · Los Angeles County | — | — |
| A C D D INC | Albert Tarbinian | — | (818) 273 4891 | Electricians | Sunland · Los Angeles County | — | — |
| A C Dave Heating & Air | David John Millard | — | (661) 270 1961 | HVAC | Green Valley · Los Angeles County | — | — |
| A C E Care INC | Roohi Masoud | — | (310) 339 1324 | HVAC | Los Angeles · Los Angeles County | — | — |
| A C Electric | Jeffrey Allen Cheraz | — | (626) 359 2225 | Electricians | Duarte · Los Angeles County | — | — |
| A C Electric | Perez Ramon | — | (818) 399 9064 | Electricians | Downey · Los Angeles County | — | — |
| A C Electrical Services | Steven Alexander Crain | — | (661) 903 1945 | Electricians | Canyon Country · Los Angeles County | — | — |
| A C Enterprises | Cardone Aldo | — | (213) 909 1593 | GC, remodel, ADU | Los Angeles · Los Angeles County | — | — |
| A C Floor Covering Company | Chavez Rosio | — | (805) 379 4151 | Other | Canoga Park · Los Angeles County | — | — |
| A C General Co | Andre Frank Castanos | — | (562) 230 1634 | GC, remodel, ADU | Los Angeles · Los Angeles County | — | — |
| A C General Construction INC | Corral Duarte Aurelio | — | (818) 383 0035 | GC, remodel, ADU | Reseda · Los Angeles County | — | — |