| A J S Electric | Palomino David | — | (818) 966 2300 | Electricians | Sylmar · Los Angeles County | — | — |
| A J's Landscaping | A J's Landscaping | — | (310) 987 1424 | Windows, patio, painters | Carson · Los Angeles County | — | — |
| A K & Associates | Agop Mesrop Kochkarian | — | (818) 653 8955 | GC, remodel, ADU | Glendale · Los Angeles County | — | — |
| A K A Plumbing | A K A Plumbing | — | (818) 434 8052 | Other | Glendale · Los Angeles County | — | — |
| A K Construction | Avraham Mayer Kimhi | — | (818) 517 3935 | GC, remodel, ADU | Tarzana · Los Angeles County | — | — |
| A K Construction | Karapetians Armik | — | (818) 681 7572 | GC, remodel, ADU | Porter Ranch · Los Angeles County | — | — |
| A K Construction | Alexandros Nikolaos Klimegos | — | (562) 208 5526 | GC, remodel, ADU | Long Beach · Los Angeles County | — | — |
| A K Electric | Alfred Reynold Klomp | — | (562) 402 9088 | Electricians | Hawaiian Gardens · Los Angeles County | — | — |
| A K Electric A Partnership | Vartan Mnayan | — | (818) 331 4618 | Electricians | Tujunga · Los Angeles County | — | — |
| A K General Contractors INC | Karimian Abbas | — | (818) 207 4400 | GC, remodel, ADU | Woodland Hills · Los Angeles County | — | — |
| A K H Construction Company | Angela K Hui | — | (626) 888 7767 | GC, remodel, ADU | Rowland Heights · Los Angeles County | — | — |
| A K International | A K International | — | (818) 648 1003 | Other | Van Nuys · Los Angeles County | — | — |
| A K M Building & Design INC | Kristian Robert Fenner | — | (323) 391 3160 | Electricians | Santa Monica · Los Angeles County | — | — |
| A K M Fire INC | Yaakov Azran | — | (818) 343 8208 | Other | Tarzana · Los Angeles County | — | — |
| A K Pro Construction Corp | Akito Wakamatsu | — | (310) 320 5757 | GC, remodel, ADU | Torrance · Los Angeles County | — | — |
| A Keith INC | Angus Jr Keith | — | (800) 326 1442 | Other roofers | Studio City · Los Angeles County | — | — |
| A L Builders INC | Yarin Adi | — | (818) 601 5030 | GC, remodel, ADU | Encino · Los Angeles County | — | — |
| A L Construction | Lorenzo Antonio | — | (661) 312 2560 | GC, remodel, ADU | Val Verde · Los Angeles County | — | — |
| A L Custom Woodwork | A L Custom Woodwork | — | (818) 772 7221 | Other | Northridge · Los Angeles County | — | — |
| A L Follett Roofing | Anthony Laurence Follett | — | (661) 254 0940 | Other roofers | Santa Clarita · Los Angeles County | — | — |
| A L G Construction | Alberto Rafael Garcia | — | (310) 433 5042 | GC, remodel, ADU | Los Angeles · Los Angeles County | — | — |
| A L Martin | A L Martin | — | (661) 943 8492 | GC, remodel, ADU | Quartz Hill · Los Angeles County | — | — |
| A L P Painting Contractor | A L P Painting Contractor | — | (310) 991 4721 | Windows, patio, painters | Lynwood · Los Angeles County | — | — |
| A L V Construction | Andre Lee Viault | — | (310) 740 7162 | GC, remodel, ADU | Los Angeles · Los Angeles County | — | — |
| A Lagunas Painting Services | Adrian Miguel Lagunas | — | (818) 438 3108 | Windows, patio, painters | Burbank · Los Angeles County | — | — |
| A Lighting INC | Levy Adam | hyy@alighting.cn | (818) 339 8985 | Electricians | Sylmar · Los Angeles County | — | — |
| A List Builders INC | Marciano Ben | — | (747) 276 8063 | GC, remodel, ADU | Sherman Oaks · Los Angeles County | — | — |
| A List Development INC | Aharon Shlomo | — | (818) 625 4134 | GC, remodel, ADU | Van Nuys · Los Angeles County | — | — |
| A Lock & A Safe Place | Kurtis Phillip Kerby | — | (818) 324 2238 | Other | Tarzana · Los Angeles County | — | — |
| A Luna Land & Hardscape INC | Armando Jr Luna | — | (310) 221 2315 | Windows, patio, painters | Torrance · Los Angeles County | — | — |
| A M & G Electric | George Victor Vera | — | (323) 304 6777 | Electricians | Whittier · Los Angeles County | — | — |
| A M A Construction & Coating INC | Mesa Martha | — | (909) 575 9765 | GC, remodel, ADU | Pomona · Los Angeles County | — | — |
| A M A Construction Incorporated | Gutierrez Miguel | — | (323) 864 1648 | GC, remodel, ADU | Los Angeles · Los Angeles County | — | — |
| A M A Construction Services INC | Ahmad Mahmoud El-Mustapha | — | (626) 859 0222 | GC, remodel, ADU | Covina · Los Angeles County | — | — |
| A M A Hardwood Floors INC | Danny Miro | — | (323) 937 3563 | GC, remodel, ADU | Los Angeles · Los Angeles County | — | — |
| A M A Plastering | A M A Plastering | — | (818) 489 8136 | Other | Canoga Park · Los Angeles County | — | — |
| A M Acoustics INC | Gali Azulay | — | (818) 758 0000 | GC, remodel, ADU | Tarzana · Los Angeles County | — | — |
| A M B Construction | Xueqian Zhu | — | (626) 377 7877 | GC, remodel, ADU | Temple City · Los Angeles County | — | — |
| A M B Enterprises INC | Mark Charles Lawler | — | (818) 353 7195 | GC, remodel, ADU | Sunland · Los Angeles County | — | — |
| A M B Glass Corp | Angel Mauricio Balan Lemus | — | (818) 941 4334 | Windows, patio, painters | Van Nuys · Los Angeles County | — | — |