| Acme Air INC | John Dominic Digiorgio | — | (661) 492 7770 | HVAC | Lancaster · Los Angeles County | — | — |
| Acme Construction INC | David Lee Jones | — | (310) 980 2666 | GC, remodel, ADU | West Hills · Los Angeles County | — | — |
| Acme Fire Protection INC | Valentin Jesus Higuera Gastelum | — | (562) 230 5716 | Other | Long Beach · Los Angeles County | — | — |
| Acme Heating & Air Conditioning Company | Albert Joseph Delgado | — | (310) 674 8747 | HVAC | Inglewood · Los Angeles County | — | — |
| Acme Landscaping INC | Jose Heriberto Gomez | — | (626) 320 2902 | Windows, patio, painters | Hacienda Heights · Los Angeles County | — | — |
| Acme Manpower INC | Steven Dipressi | — | (661) 438 3000 | Windows, patio, painters | Lancaster · Los Angeles County | — | — |
| Acme Valley Key Service | Carl Conlee Clampitt | — | (818) 785 7746 | Other | Van Nuys · Los Angeles County | — | — |
| Acme Valley Security Services INC | Brett David Salles | — | (877) 266 6411 | Alarm and generators | Van Nuys · Los Angeles County | — | — |
| Acn Construction Services | Garcia Armando Carrillo | — | (213) 210 9592 | GC, remodel, ADU | Los Angeles · Los Angeles County | — | — |
| Acon Development INC | Yeong Sik Kim | — | (323) 737 3101 | GC, remodel, ADU | Los Angeles · Los Angeles County | — | — |
| Acorn Tree Service | Regino Nevarez Avalos | — | (800) 566 4873 | Windows, patio, painters | Covina · Los Angeles County | — | — |
| Acosta & Sons Sewer Contractor | Bernardo Montoya | — | (818) 248 3355 | Other | Glendale · Los Angeles County | — | — |
| Acosta Engineering | Acosta Engineering | — | (562) 777 6555 | Other | Whittier · Los Angeles County | — | — |
| Acosta H V A C | Acosta H V A C | — | (714) 928 2310 | HVAC | La Mirada · Los Angeles County | — | — |
| Acosta Plumbing Corp | Acosta Fermin Herrera | — | (626) 363 5849 | Other | Pasadena · Los Angeles County | — | — |
| Acosta Remodeling | Acosta Remodeling | — | (626) 918 0821 | GC, remodel, ADU | La Puente · Los Angeles County | — | — |
| Acosta Roofing INC | Adrian Acosta | — | (818) 800 8164 | Other roofers | Los Angeles · Los Angeles County | — | — |
| Acosta Tree Service | Ruben Richard Acosta | — | (562) 328 9819 | Tree | Covina · Los Angeles County | — | — |
| Acotillo Tree Service INC | Marvin Alberto Contreras | — | (323) 314 6294 | Tree | Los Angeles · Los Angeles County | — | — |
| Acoustic Ceilings Enterprise INC | Victoria Ann Campanario | — | (310) 489 0488 | GC, remodel, ADU | Lomita · Los Angeles County | — | — |
| Acoustical Construction INC | Daniel Lee Perkins | — | (818) 767 0325 | GC, remodel, ADU | Sun Valley · Los Angeles County | — | — |
| Acoustical Fabric Systems INC | Carlos Garibay | — | (562) 633 6050 | Other | Bellflower · Los Angeles County | — | — |
| Acp Blason LLC | George Benjamin Ii Timmerman | — | (626) 301 0550 | Other | Monrovia · Los Angeles County | — | — |
| Acp Electric | Carabes Abel | — | (310) 619 7935 | Electricians | Wilmington · Los Angeles County | — | — |
| Acr Air Conditioning | Acr Air Conditioning | — | (626) 579 7870 | HVAC | Hacienda Heights · Los Angeles County | — | — |
| Acr Heating & Cooling INC | Oren Dangour | — | (818) 665 6939 | HVAC | Canoga Park · Los Angeles County | — | — |
| Acre Group | Alana Cheung | — | (626) 243 3545 | GC, remodel, ADU | Santa Monica · Los Angeles County | — | — |
| Acre Landscape | Acre Landscape | — | (310) 539 8802 | Windows, patio, painters | Lomita · Los Angeles County | — | — |
| Acreage Construction | David Jr Munoz | — | (626) 818 3169 | GC, remodel, ADU | La Habra Heights · Los Angeles County | — | — |
| Acro Development INC DBA Acro Constructors | Francisco Javier Primera | — | (818) 238 0298 | GC, remodel, ADU | Burbank · Los Angeles County | — | — |
| Acs Design Build Group INC | Marco Antonio Quezada | — | (626) 398 1643 | GC, remodel, ADU | Altadena · Los Angeles County | — | — |
| Acs Global LLC | Douglas James Gleed | — | (858) 735 3720 | Other | Long Beach · Los Angeles County | — | — |
| Acs Plumbing | Andres Costancio Soberanis | — | (714) 904 3099 | Other | Los Angeles · Los Angeles County | — | — |
| Acs Security | Acs Security | — | (310) 475-9016 | Alarm and generators | Los Angeles · Los Angeles County | — | — |
| Acs Sheet Metal | Garcia Wilmer Chojolan | — | (213) 282 0743 | Other | Los Angeles · Los Angeles County | — | — |
| Acsco,inc | David John Lewis | — | (626) 798 3649 | HVAC | Pasadena · Los Angeles County | — | — |
| Act Developments | Lin Jack | — | (626) 572 4019 | GC, remodel, ADU | Temple City · Los Angeles County | — | — |
| Act Fast Restoration | Hernandez Osmin | — | (818) 504 8450 | GC, remodel, ADU | La Crescenta · Los Angeles County | — | — |
| Act Now! Instant Signs INC | Guillermo Maldonado Araiza | — | (909) 394 7818 | Other | San Dimas · Los Angeles County | — | — |
| Action 1 Construction | Subhi Hussein Elodat | — | (310) 946 6688 | GC, remodel, ADU | Lawndale · Los Angeles County | — | — |