| A A Landscaping | A A Landscaping | — | (661) 946 1419 | Windows, patio, painters | Lancaster · Los Angeles County | — | — |
| A A Napiwocki Construction | Arthur Alex Napiwocki | — | (818) 957 3985 | GC, remodel, ADU | La Crescenta · Los Angeles County | — | — |
| A A Phone & Wire Co | Santos Efraim | — | (818) 314 1425 | Other | Northridge · Los Angeles County | — | — |
| A A Technology & Electric Services | Mosco Francisco | — | (323) 343 8726 | Electricians | Lancaster · Los Angeles County | — | — |
| A Allbright INC | Joshua Aaron Abramson | — | (661) 294 1159 | GC, remodel, ADU | Valencia · Los Angeles County | — | — |
| A And A Electrical Systems INC | David Alejandro Aguirre Perez | — | (323) 952 1282 | Electricians | El Monte · Los Angeles County | — | — |
| A And A Home Repair And Remodel | Hugo Estuardo Alvarez | — | (323) 273 6885 | GC, remodel, ADU | Los Angeles · Los Angeles County | — | — |
| A And C Custom Cabinets INC | Cesar Humberto Guerrero Campos | — | (818) 309 9545 | Other | Valencia · Los Angeles County | — | — |
| A And C Electrical | Juan C Argueta | — | (213) 255 1210 | Electricians | Los Angeles · Los Angeles County | — | — |
| A And D Electric | Duarte George | — | (310) 908 7572 | Electricians | Torrance · Los Angeles County | — | — |
| A And E Heating And Cooling INC | Levik Pogosian | — | (818) 497 1471 | HVAC | Tujunga · Los Angeles County | — | — |
| A And F Electric | Arredondo Fernando | — | (818) 618 5216 | Electricians | North Hollywood · Los Angeles County | — | — |
| A And G Construction Solutions INC | Andres Jr Chavez | — | (323) 691 2111 | GC, remodel, ADU | Los Angeles · Los Angeles County | — | — |
| A And H Electric Company INC | Henrik Rashidzadeh | — | (818) 430 5130 | Electricians | Glendale · Los Angeles County | — | — |
| A And H Glazing LLC | Hany Fathy Ibrahim | — | (626) 674 4011 | Windows, patio, painters | Baldwin Park · Los Angeles County | — | — |
| A And J Business Development Services LLC | Abdallah Hanna Al Bairuti | — | (661) 662 2533 | GC, remodel, ADU | Northridge · Los Angeles County | — | — |
| A And K Construction And Realty INC | Kenny Chijian| Lui Chijian Lui | — | (626) 821 1919 | GC, remodel, ADU | Arcadia · Los Angeles County | — | — |
| A And L Systems Solutions | A And L Systems Solutions | — | (909) 957 9201 | Other | Diamond Bar · Los Angeles County | — | — |
| A And M Construction INC | Alex Semerjian | — | (818) 424 3200 | Electricians | Glendale · Los Angeles County | — | — |
| A And M Heating And Air Conditioning | Pavelich Michael | — | (818) 341 7757 | HVAC | Saugus · Los Angeles County | — | — |
| A And S Reade Plumbing | A And S Reade Plumbing | — | (310) 490 6192 | Other | Redondo Beach · Los Angeles County | — | — |
| A And S Roofing INC | Arthur Manuel Cain | — | (661) 253 1459 | Other roofers | Newhall · Los Angeles County | — | — |
| A And V Global Remodeling INC | Vigen Baghdassarian | — | (818) 283 4142 | GC, remodel, ADU | La Crescenta · Los Angeles County | — | — |
| A B & Sons Electrical Co | Becerra Abraham | — | (424) 291 0407 | Electricians | Sylmar · Los Angeles County | — | — |
| A B A Construction | Albert Sung Min Kim | — | (213) 800 1755 | GC, remodel, ADU | Glendale · Los Angeles County | — | — |
| A B A Glass & Windows | Parada Antonio | — | (323) 256 4949 | Windows, patio, painters | Los Angeles · Los Angeles County | — | — |
| A B Audio Video LLC | Antony Barbera | — | (310) 453 8944 | Other | Santa Monica · Los Angeles County | — | — |
| A B C Aguero's Builders Company INC | Lazaro Aguero | — | (818) 689 7294 | GC, remodel, ADU | Los Angeles · Los Angeles County | — | — |
| A B C Carpet | A B C Carpet | — | (626) 858 2363 | Other | West Covina · Los Angeles County | — | — |
| A B C Commercial Roofing INC DBA Roofing By A B C | Rivera Steven | — | (844) 619 7663 | Other roofers | Torrance · Los Angeles County | — | — |
| A B C Construction Co | Byong Kwan Choi | — | (213) 380 9073 | Other roofers | Los Angeles · Los Angeles County | — | — |
| A B C D Builders INC | Azulay Itamar | — | (818) 968 8810 | GC, remodel, ADU | West Hills · Los Angeles County | — | — |
| A B C Electric | Raymond Christoph Mac Neil | — | (562) 676 6628 | Electricians | Long Beach · Los Angeles County | — | — |
| A B C Electric | Hudak Ferenc | — | (310) 713 6003 | Electricians | Harbor City · Los Angeles County | — | — |
| A B C Hardwood Flooring | A B C Hardwood Flooring | — | (818) 939 9700 | Other | Northridge · Los Angeles County | — | — |
| A B C Liovin Drilling INC | Vassili I Liovin | — | (562) 981 8575 | Other | Signal Hill · Los Angeles County | — | — |
| A B C Pool And Spa Repairs | Dilia Lineth Herrarte | — | (818) 963 8842 | Pool | Canoga Park · Los Angeles County | — | — |
| A B C Restaurant Equipment Co | Brian Kim Lien | — | (626) 442 1821 | HVAC | South El Monte · Los Angeles County | — | — |
| A B Castle Building Contractor INC | Abel Estuardo Barrera Zavala | — | (213) 249 4466 | GC, remodel, ADU | Los Angeles · Los Angeles County | — | — |
| A B Concepts | A B Concepts | — | (818) 262 5677 | GC, remodel, ADU | Malibu · Los Angeles County | — | — |