| A & M Master Painters | Mario Alberto Hernandez | — | (310) 621 0719 | Windows, patio, painters | Los Angeles · Los Angeles County | — | — |
| A & M Pools INC | James Edward Michaud | — | (562) 665 0845 | Pool | La Habra Heights · Los Angeles County | — | — |
| A & M Sign Corporation | Chavez Alberto | — | (626) 542 3606 | Other | So El Monte · Los Angeles County | — | — |
| A & N Building Innovations INC | Miguel Angel Amador Tinajero | — | (818) 554 3059 | GC, remodel, ADU | Arleta · Los Angeles County | — | — |
| A & O Construction -builders LLC | Adrian Humberto Santana | — | (818) 239 9577 | GC, remodel, ADU | Sherman Oaks · Los Angeles County | — | — |
| A & O Electric | Armando Amado Lopez | — | (323) 846 1540 | Electricians | West Covina · Los Angeles County | — | — |
| A & O INC | Carlos Alberto Guillen | — | (323) 833 2825 | GC, remodel, ADU | Bell · Los Angeles County | — | — |
| A & P Electric INC | Megerdichian Albert | — | (818) 400 1525 | Electricians | Montrose · Los Angeles County | — | — |
| A & P Gates | Shirelle Kurzwell | — | (818) 798 8388 | Other | North Hollywood · Los Angeles County | — | — |
| A & R Builders Express | Jason Jinwoo Chung | — | (562) 704 9888 | GC, remodel, ADU | Paramount · Los Angeles County | — | — |
| A & R Builders INC | Longuryan Arthur | — | (213) 505 0070 | GC, remodel, ADU | Glendale · Los Angeles County | — | — |
| A & R Construction | Nicolas Aquino | — | (818) 675 4533 | GC, remodel, ADU | San Fernando · Los Angeles County | — | — |
| A & R Fire Tech LLC | Yaghoubimassihi Aramic | — | (818) 296 5804 | Electricians | Sylmar · Los Angeles County | — | — |
| A & R Granite And Marble | Ekmekchyan Ruben | — | (818) 522 2146 | Other | Van Nuys · Los Angeles County | — | — |
| A & R Junior Glass & Windows | Richard Sauceda | — | (323) 777 1344 | Windows, patio, painters | Reseda · Los Angeles County | — | — |
| A & R Plumbing | A & R Plumbing | — | (818) 317 9386 | Other | Van Nuys · Los Angeles County | — | — |
| A & R Reconstruction INC | Antonio Rivera | — | (323) 493 1536 | GC, remodel, ADU | Bell Gardens · Los Angeles County | — | — |
| A & R Safe & Lock Corporation | Dennis Lee Brooks | — | (626) 444 2460 | Other | Glendora · Los Angeles County | — | — |
| A & R Swimming Pool Co | Soo Il Park | — | (818) 363 1718 | Pool | Granada Hills · Los Angeles County | — | — |
| A & R Telecom INC | Lisa Arico Rodriguez | — | (562) 531 1785 | HVAC | Bellflower · Los Angeles County | — | — |
| A & R Works | Jesus Sr Huizar | — | (310) 986 7021 | GC, remodel, ADU | Gardena · Los Angeles County | — | — |
| A & S Construction,inc | Adir Yehuda Sabag | — | (310) 689 6683 | GC, remodel, ADU | Los Angeles · Los Angeles County | — | — |
| A & S Constructors INC | Alvarez Austreberto | — | (562) 824 1618 | GC, remodel, ADU | Monterey Park · Los Angeles County | — | — |
| A & S Floor Covering | A & S Floor Covering | — | (818) 883 2200 | Other | Canoga Park · Los Angeles County | — | — |
| A & S Glass INC | Victor Hugo Gonzalez Jimenez | — | (323) 468 9203 | Windows, patio, painters | Los Angeles · Los Angeles County | — | — |
| A & S Landscaping INC | Hector Guadalupe Alvarado | — | (818) 882 6998 | Windows, patio, painters | Northridge · Los Angeles County | — | — |
| A & S Metal Recycling INC | Scott Alexander | — | (213) 623 9443 | Other | Los Angeles · Los Angeles County | — | — |
| A & S Plumbing And Rooter Services INC | Sevak Karapetyan | — | (818) 941 4144 | Other | Burbank · Los Angeles County | — | — |
| A & Sona Service | Houshang Zahedi | — | (310) 890 2614 | Other | Woodland Hills · Los Angeles County | — | — |
| A & T Stoneworks INC | Terry Lee Wick | — | (661) 816 7544 | Other | Palmdale · Los Angeles County | — | — |
| A & V Painting & Decorating | Victor Manuel Useda | — | (818) 231 0453 | Windows, patio, painters | Winnetka · Los Angeles County | — | — |
| A & W General Contractor | A & W General Contractor | — | (562) 706 2858 | GC, remodel, ADU | Artesia · Los Angeles County | — | — |
| A & Y Sanitation Systems | Ayman Mohd Albaja | — | (818) 779 0403 | Other | Granada Hills · Los Angeles County | — | — |
| A & Z Decks & Stairs INC | Andrey Avramov Radev | — | (818) 359 1908 | GC, remodel, ADU | Burbank · Los Angeles County | — | — |
| A + Cal's Construction | Calogero Ferruggia | — | (661) 645 9988 | GC, remodel, ADU | Stevenson Ranch · Los Angeles County | — | — |
| A + Demo INC | Ortiz Jency Leon | — | (323) 377 9171 | Other | Palmdale · Los Angeles County | — | — |
| A + Electric & Plumbing | Terteryan Ghukas | — | (818) 421 5290 | Electricians | Tujunga · Los Angeles County | — | — |
| A + Electricians | Jose Antonio Sesma | — | (818) 309 6525 | Electricians | Reseda · Los Angeles County | — | — |
| A + Garage Door Co | Juan Manuel Mota | — | (562) 824 0079 | Other | Long Beach · Los Angeles County | — | — |
| A + Glass & Mirror INC | Santiago Pascasio Martinez | — | (818) 982 2001 | Windows, patio, painters | North Hollywood · Los Angeles County | — | — |