| Ackerman's Custom Woodworks | Ackerman's Custom Woodworks | — | (714) 497 8118 | GC, remodel, ADU | Winchester · Riverside County | — | — |
| Ackermann Dalton | Ackermann Dalton | — | (951) 599 3661 | Electricians | Winchester · Riverside County | — | — |
| Ackland International INC | Ekundayo Akinwande Sowunmi | — | (510) 564 4284 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Ackley Electric | Jesse Orion Ackley | — | (530) 616 0524 | Electricians | Meadow Valley · Plumas County | — | — |
| Ackley Engineering | Ackley Engineering | — | (530) 249 4052 | Other | Quincy · Plumas County | — | — |
| Ackley Sheetmetal INC | Dennis Craig Ackley | support@ackind.net | (510) 760 9879 | HVAC | Hayward · Alameda County | — | — |
| Acknowledge Plumbing | Richard Jordan Havens | — | (916) 812 5780 | Other | Sacramento · Sacramento County | — | — |
| Ackseen INC | Farhad Mahjoub | — | (818) 925 2627 | Other | Woodland Hills · Los Angeles County | — | — |
| Acl Renovations & Repairs | Acl Renovations & Repairs | — | (559) 905 4991 | GC, remodel, ADU | Fresno · Fresno County | — | — |
| Acl Tree Works LLC | Acl Tree Works LLC | — | (626) 757-3041 | Tree | Crestline · Lake County | — | — |
| Aclara Consulting | Aclara Consulting | — | (408) 228 7526 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Acm Construction | Cardenas Apolinar | — | (626) 875 9842 | GC, remodel, ADU | Pomona · Los Angeles County | — | — |
| Acm Construction Services INC | Miguel Angel Contreras Cota | — | (916) 532 3503 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Acm General Construction | Murgo Magana Oscar | acmgeneralconstruction@gmail.com | (916) 832 4415 | GC, remodel, ADU | Sacramento · Sacramento County | — | — |
| Acm General Construction INC | Cintora Morales Alejandro | — | (818) 454 9620 | GC, remodel, ADU | Pacoima · Los Angeles County | — | — |
| Acm Landscaping Designs | Castillo Mario Andrade | — | (909) 361 8182 | Windows, patio, painters | Twin Peaks · San Bernardino County | — | — |
| Acm Lighting Services | Carlos Humberto Jr Morales | lemonad@jovanny.ru | (951) 830 0423 | Electricians | Corona · Riverside County | — | — |
| Acm Masonry INC | Angel Cruz Martinez | — | (909) 556 7418 | Other | Redlands · San Bernardino County | — | — |
| Acm Painters Corporation | Cruz Maravilla Alejandro | — | (707) 477 5425 | Windows, patio, painters | Santa Rosa · Sonoma County | — | — |
| Acm+ Environmental Services | Amaro Alfredo | — | (562) 633 3862 | GC, remodel, ADU | Paramount · Los Angeles County | — | — |
| Acman Quality HVAC INC | Guadalupe Rodolfo Alfaro Zurita | info@acmanqualityhvac.com | (858) 280 5483 | HVAC | Vista · San Diego County | — | — |
| Acme 805 Builders | Salazar Juan Ramirez | — | (805) 570 4076 | GC, remodel, ADU | Santa Barbara · Santa Barbara County | — | — |
| Acme Acoustic | Acme Acoustic | — | (530) 929 7254 | Other | Concord · Contra Costa County | — | — |
| Acme Air INC | John Dominic Digiorgio | — | (661) 492 7770 | HVAC | Lancaster · Los Angeles County | — | — |
| Acme Automation Corporation | Robert Vuong Tran | — | (858) 225 7550 | Electricians | San Diego · San Diego County | — | — |
| Acme Awning Company | Chih Ling Han | — | (510) 635 6383 | Other | Hayward · Alameda County | — | — |
| Acme Awning LLC | Aaron Stephen Dani Clore | — | (831) 424 7134 | Other | Salinas · Monterey County | — | — |
| Acme Bay Area Backflow INC | Mark Richard Delzer | — | (415) 505 3917 | Other | San Francisco · San Francisco County | — | — |
| Acme Builders | Acme Builders | — | (415) 573 5063 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Acme Construction | Alfonso Salazar-Gonzalez | — | (916) 509 3546 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Acme Construction Company INC | Philip Anthony Mastagni | — | (209) 523 2674 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Acme Construction INC | David Lee Jones | — | (310) 980 2666 | GC, remodel, ADU | West Hills · Los Angeles County | — | — |
| Acme Drywall Services | John Christopher Duff | — | (562) 986 0556 | GC, remodel, ADU | Los Alamitos · Orange County | — | — |
| Acme Electric | Jimmy Dowl Hollabaugh | — | (707) 974 4013 | Electricians | Yountville · Napa County | — | — |
| Acme Electric Co | Randy Stephen Brazil | — | (209) 667 2851 | Electricians | Turlock · Stanislaus County | — | — |
| Acme Engineering Incorporated DBA Acme Pump And Water Service | Jon Michael Terry | — | (707) 253 2263 | Other | Napa · Napa County | — | — |
| Acme Fire Extinguisher Company | Bruce Howard Macleod | — | (510) 532 4040 | Other | Oakland · Alameda County | — | — |
| Acme Fire Protection INC | Valentin Jesus Higuera Gastelum | — | (562) 230 5716 | Other | Long Beach · Los Angeles County | — | — |
| Acme Glass Co INC | Eric Anthony Wortman | — | (707) 422 3626 | Windows, patio, painters | Fairfield · Solano County | — | — |
| Acme Heating & Air Conditioning Company | Albert Joseph Delgado | — | (310) 674 8747 | HVAC | Inglewood · Los Angeles County | — | — |