| A A A/c & Builder | A A A/c & Builder | — | (626) 278 4521 | HVAC | San Gabriel · Los Angeles County | — | — |
| A A Allied Co | Daniel Sang Chyun | — | (213) 507 7246 | GC, remodel, ADU | Los Angeles · Los Angeles County | — | — |
| A A B Garage Doors INC | Fatima Gheith Kabalawi | — | (310) 530 3637 | Other | Torrance · Los Angeles County | — | — |
| A A B Innovation Construction & Remodel INC | Becerril Rangel Alberto | — | (909) 714 8499 | GC, remodel, ADU | San Bernardino · San Bernardino County | — | — |
| A A B Plumbing INC | Sam Abraham | — | (310) 651 0322 | Other | San Diego · San Diego County | — | — |
| A A Builders & Company | Arturo| Alcanta R Arturo Jr Alcantar | — | (650) 504 4294 | GC, remodel, ADU | South San Francisco · San Mateo County | — | — |
| A A C Construction | Christian Jean Rousset | — | (925) 890 4482 | GC, remodel, ADU | Pleasant Hill · Contra Costa County | — | — |
| A A C Construction INC | Anthony Sal Collins | — | (559) 500 1281 | HVAC | Tulare · Tulare County | — | — |
| A A C R General Construction INC | Jose Luis Villalpando Rocha | — | (844) 222 7421 | GC, remodel, ADU | Downey · Los Angeles County | — | — |
| A A Calonestar Electric | Joon Hyun Nam | — | (213) 864 8831 | Electricians | Anaheim · Orange County | — | — |
| A A Construction | Andrew Gilbert Aragon | — | (626) 858 9382 | GC, remodel, ADU | West Covina · Los Angeles County | — | — |
| A A Construction | Donald Joe Colvin | — | (916) 799 9416 | HVAC | Isleton · Sacramento County | — | — |
| A A Construction | Wayne Arnett | — | (909) 421 7960 | Other | Rialto · San Bernardino County | — | — |
| A A Construction | Adrian S Alatorre | — | (562) 972 7680 | GC, remodel, ADU | La Mirada · Los Angeles County | — | — |
| A A Construction Co | Robin Hoa Tu | — | (408) 827 1161 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| A A Construction Company INC | Andrew Douglas Ackerman | — | (831) 800 6664 | GC, remodel, ADU | Pacific Grove · Monterey County | — | — |
| A A Construction Group INC | Arnoldo Rivera Verduzco | — | (650) 328 1530 | GC, remodel, ADU | Menlo Park · San Mateo County | — | — |
| A A Custom Construction Services A California Joint Venture | & D Plumbing A | — | (925) 922 4770 | GC, remodel, ADU | Walnut Creek · Contra Costa County | — | — |
| A A Demolition INC | Alejandro Aguilar-Garcia | — | (213) 864 9499 | Other | Los Angeles · Los Angeles County | — | — |
| A A Desoto Flooring & Carpet | Zekrollah Rabbani | — | (818) 700 7800 | Other | Canoga Park · Los Angeles County | — | — |
| A A Discount Phone System | A A Discount Phone System | — | (415) 664 8000 | Other | San Francisco · San Francisco County | — | — |
| A A Divine Legacy General Contractors INC | Juan Alejandro Vazquez | — | (619) 519 2852 | GC, remodel, ADU | Lemon Grove · San Diego County | — | — |
| A A E Construction INC | Juan Antonio Burgos Favela | — | (209) 408 9133 | GC, remodel, ADU | Ceres · Stanislaus County | — | — |
| A A E Group Construction Corp | Ahmad Ali Eslami | — | (510) 774 8387 | Electricians | Berkeley · Alameda County | — | — |
| A A E S INC | Atif Ahmad Ammar | — | (209) 601 0038 | Electricians | Riverbank · Stanislaus County | — | — |
| A A Electric | Oscar Armando Alvarez | — | (714) 492 3761 | Electricians | Hesperia · San Bernardino County | — | — |
| A A Electric | Ashween Ashnil Prasad | — | (650) 834 2603 | Electricians | Hayward · Alameda County | — | — |
| A A Electric | Arthur Daniel Diaz | — | (909) 838 1814 | Electricians | Riverside · Riverside County | — | — |
| A A Electric & Plumbing INC | Armen Deiravanessi Tabrozzo | — | (818) 937 9803 | Electricians | Glendale · Los Angeles County | — | — |
| A A Electric Co | Alexandru Arthur Achimi | — | (818) 595 1135 | Electricians | Woodland Hills · Los Angeles County | — | — |
| A A Electrical | Hoang Anh Nguyen | — | (408) 858 7130 | Electricians | San Jose · Santa Clara County | — | — |
| A A Electrical Service | Alan Wayne Addie | — | (310) 714 6915 | Electricians | Fontana · San Bernardino County | — | — |
| A A Electrical Services INC | Alexander Matveyevich Polishchuk | — | (818) 437 6736 | Electricians | Granada Hills · Los Angeles County | — | — |
| A A Finish Carpentry And Supply | Alekseyev Aleksandr | — | (916) 849 5309 | Windows, patio, painters | Sacramento · Sacramento County | — | — |
| A A Fire Systems INC | Manuel Neftali Valdez Perez | — | (916) 933 0800 | Other | Granite Bay · Placer County | — | — |
| A A G Construction And Development | Randy Ray Argo | — | (909) 599 0746 | Electricians | San Dimas · Los Angeles County | — | — |
| A A G Construction Company | Zakaryan Grigor | — | (310) 801 6216 | GC, remodel, ADU | La Canada · Los Angeles County | — | — |
| A A G Services INC | Mkrtich Peltikian | — | (818) 767 0303 | Electricians | Sun Valley · Los Angeles County | — | — |
| A A Garage Doors | A A Garage Doors | — | (916) 620 1701 | Other | Sacramento · Sacramento County | — | — |
| A A General Construction | Arturo Cesar Leal Mata | info@aageneralconstruction.com | (951) 349 5226 | GC, remodel, ADU | Jurupa Valley · Riverside County | — | — |