| A + Plumbing Co | Zhorzhik George Karapetyan | — | (818) 389 8994 | Other | Glendale · Los Angeles County | — | — |
| A + Superior Sanitation INC | Anthony A Gasinski | — | (661) 269 0283 | Other | Acton · Los Angeles County | — | — |
| A + Sustainable Landscape | A + Sustainable Landscape | — | (661) 202 4003 | Windows, patio, painters | Palmdale · Los Angeles County | — | — |
| A - 1 Apex Plumbing INC | Avi Gabay | — | (818) 344 3342 | Other | Reseda · Los Angeles County | — | — |
| A - 1 Certified Electric INC | Zafarian Henrik | — | (818) 974 9315 | Electricians | Glendale · Los Angeles County | — | — |
| A - 1 Concrete & Construction INC | Pascual Humberto Campos Rodarte | — | (626) 523 5222 | GC, remodel, ADU | Azusa · Los Angeles County | — | — |
| A - 1 Construction | Gary Darnell Scanlon | — | (818) 709 4341 | GC, remodel, ADU | Chatsworth · Los Angeles County | — | — |
| A - 1 Floor Covering Co | Stanley Michael Levy | — | (323) 938 3716 | Other | Los Angeles · Los Angeles County | — | — |
| A - 1 Performance Rooter & Plumbing | Carl Scott Thomas | — | (562) 420 6458 | Other | Lakewood · Los Angeles County | — | — |
| A - 1 Plumbing & Rooter INC | Shmuel Karpman | — | (818) 974 3344 | Other | La Crescenta · Los Angeles County | — | — |
| A - 1 Sandblasting & Stucco Co INC | Alfredo Franco Torres | — | (310) 880 6584 | Windows, patio, painters | Inglewood · Los Angeles County | — | — |
| A - 1 Service Appliances INC | Amir M Mikhaiel | — | (310) 390 7870 | HVAC | Los Angeles · Los Angeles County | — | — |
| A - 1 Sprinkler & Landscaping | Munoz Ricardo | — | (310) 451 3300 | Windows, patio, painters | Reseda · Los Angeles County | — | — |
| A - 1 Total Service Plumbing | Raymond Lloyd Gray | — | (888) 201 8856 | GC, remodel, ADU | Los Angeles · Los Angeles County | — | — |
| A - 1 Welding Iron Works INC | Sophia Yon Hee Shin | — | (323) 277 3590 | Other | Vernon · Los Angeles County | — | — |
| A - 26 Construction & Electrical Contractors Company | Akaks Daniel | — | (310) 382 6400 | Electricians | Los Angeles · Los Angeles County | — | — |
| A - 3 Electric | Nazarian Norier | — | (818) 429 3431 | Electricians | Burbank · Los Angeles County | — | — |
| A - American Gate Tech | A - American Gate Tech | — | (661) 350 6590 | Other | Lake Los Angeles · Los Angeles County | — | — |
| A - Automated Security Gates | A - Automated Security Gates | — | (818) 720 4088 | Alarm and generators | Agua Dulce · Los Angeles County | — | — |
| A - C Concrete | A - C Concrete | — | (562) 755 1941 | Other | Norwalk · Los Angeles County | — | — |
| A - Custom Construction Co | Pete Cabrera Ramirez | — | (323) 722 6435 | GC, remodel, ADU | City Of Commerce · Los Angeles County | — | — |
| A - Custom Door & Window | Mike Allen Robertson | — | (818) 516 2104 | GC, remodel, ADU | Monrovia · Los Angeles County | — | — |
| A - Fordable Plumbing | A - Fordable Plumbing | — | (562) 502 0216 | Other | Paramount · Los Angeles County | — | — |
| A - J Cabinets | A - J Cabinets | — | (661) 718 5717 | Other | Lancaster · Los Angeles County | — | — |
| A - List Construction INC | Siton Boaz | — | (818) 915 4010 | Electricians | Porter Ranch · Los Angeles County | — | — |
| A - M Electric | Pedro Alexander Mejia | — | (818) 307 6490 | Electricians | Palmdale · Los Angeles County | — | — |
| A - One Construction/remodeling | Gus Kenneth Lopez | — | (818) 470 7915 | GC, remodel, ADU | Glendale · Los Angeles County | — | — |
| A - Plus Window Tint Deluxe | Werner Josef Schoenauer | — | (310) 946 6707 | Other | Redondo Beach · Los Angeles County | — | — |
| A - Shining Painting Co | Dong Hyun Kim | — | (213) 385 4412 | Windows, patio, painters | La Canada · Los Angeles County | — | — |
| A - Tak Fire Protection | Mirzakhanian Vrej | — | (818) 806 8066 | Electricians | La Crescenta · Los Angeles County | — | — |
| A - Team Builders INC | Netanel Eliezer Skolnick | — | (818) 313 9990 | GC, remodel, ADU | Woodland Hills · Los Angeles County | — | — |
| A - Twister | A - Twister | — | (818) 616 4204 | Other | Van Nuys · Los Angeles County | — | — |
| A / C Control INC | Babak Allan Firoozi | — | (310) 909 4814 | HVAC | Los Angeles · Los Angeles County | — | — |
| A 1 - Stop Garage Door Company | Karl Lee Meidell | — | (661) 947 8464 | Other | Palmdale · Los Angeles County | — | — |
| A 1 Carpet Market | Adel Chafic Tayara | — | (310) 327 0514 | Other | Torrance · Los Angeles County | — | — |
| A 1 Construction & Designs INC | Irit Friedman | — | (310) 350 3583 | GC, remodel, ADU | Los Angeles · Los Angeles County | — | — |
| A 1 Construction INC | Krikor Abajian | — | (818) 266 1444 | GC, remodel, ADU | Azusa · Los Angeles County | — | — |
| A 1 Copper Repipe Specialist | A 1 Copper Repipe Specialist | — | (562) 423 0777 | Other | Long Beach · Los Angeles County | — | — |
| A 1 Demolition | Samuel Humberto Bonilla | — | (310) 529 5466 | Other | Compton · Los Angeles County | — | — |
| A 1 Quality Restoration INC DBA Servpro Of Downtown Long Beach | Hayssam Muhamad Tohme | — | (562) 591 1788 | GC, remodel, ADU | Long Beach · Los Angeles County | — | — |