| A And S Fire Protection INC | Randall Ray Schram | micah@micahrich.com | (805) 650 2505 | Electricians | Ventura · Ventura 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 T Electric | Edward Jr Ford | — | (619) 843 7817 | Electricians | San Diego · San Diego County | — | — |
| A And V Global Remodeling INC | Vigen Baghdassarian | — | (818) 283 4142 | GC, remodel, ADU | La Crescenta · Los Angeles County | — | — |
| A And Z Construction Services | Zen Orion Fuller | — | (530) 919 1366 | GC, remodel, ADU | Georgetown · El Dorado County | — | — |
| A Angelo's Roofing Co | Medina Angel | — | (831) 427 8334 | Other roofers | Aptos · Santa Cruz County | — | — |
| A Available Affordable Plumber INC | Maxwell Whitney Wichman | — | (714) 408 8160 | Other | Huntington Beach · Orange County | — | — |
| A Avco Plumbing - Heating - A/c | Frederick Dale Ballard | — | (909) 822 8000 | HVAC | Fontana · San Bernardino County | — | — |
| A B & Sons Electrical Co | Becerra Abraham | — | (424) 291 0407 | Electricians | Sylmar · Los Angeles County | — | — |
| A B - Pro | A B - Pro | — | (209) 968 7655 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| A B A Alarm Company INC | Edward Martin Link | — | (800) 444 2542 | Electricians | Huntington Beach · Orange County | — | — |
| A B A Construction | Albert Sung Min Kim | — | (213) 800 1755 | GC, remodel, ADU | Glendale · Los Angeles County | — | — |
| A B A Construction | Abraham Marino Aguirre | — | (408) 702 7330 | GC, remodel, ADU | Sunnyvale · Santa Clara County | — | — |
| A B A Glass & Windows | Parada Antonio | — | (323) 256 4949 | Windows, patio, painters | Los Angeles · Los Angeles County | — | — |
| A B Alpha Roofing | Bello Miranda Alejandro | — | (510) 967 2643 | Other roofers | Oakland · Alameda County | — | — |
| A B Audio Video LLC | Antony Barbera | — | (310) 453 8944 | Other | Santa Monica · Los Angeles County | — | — |
| A B Blinds | A B Blinds | — | (760) 801 5472 | Other | El Cajon · San Diego County | — | — |
| A B Builders | A B Builders | — | (707) 490 2304 | GC, remodel, ADU | Hidden Valley Lake · Lake County | — | — |
| A B Builders INC | Hector Gallegos | — | (925) 759 3095 | GC, remodel, ADU | Pittsburg · Contra Costa 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 Asphalt | A B C Asphalt | — | (707) 769 4429 | Other | Petaluma · Sonoma County | — | — |
| A B C Auto Glass INC DBA Glass Doctor Of The Gold Country | Mark Richard Borchin | — | (209) 223 3101 | Windows, patio, painters | Jackson · Amador County | — | — |
| A B C Bay Painting Co | Heon Joo Chin | — | (408) 263 0066 | Windows, patio, painters | Lathrop · San Joaquin County | — | — |
| A B C Building & Restoration INC | James David Sutton | — | (925) 766 8383 | GC, remodel, ADU | Brentwood · Contra Costa County | — | — |
| A B C Builds INC | Alfred Joseph Borkowski | — | (805) 276 2769 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| A B C Carpet | A B C Carpet | — | (626) 858 2363 | Other | West Covina · Los Angeles County | — | — |
| A B C City Electric | Hau Sum Chan | — | (415) 860 8372 | Electricians | San Francisco · San Francisco 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 | Luis Eduardo Alves | — | (510) 895 6200 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| A B C Construction | Clemons Abraham | — | (209) 617 3169 | GC, remodel, ADU | Mariposa · Mariposa County | — | — |
| A B C Construction | Xuan Van Le | — | (510) 499 2660 | Electricians | San Lorenzo · Alameda County | — | — |
| A B C Construction Co | Byong Kwan Choi | — | (213) 380 9073 | Other roofers | Los Angeles · Los Angeles County | — | — |
| A B C Constructors INC | Antonio Carranza Orozco | — | (530) 681 0331 | GC, remodel, ADU | Penn Valley · Nevada County | — | — |
| A B C Custom Wood Shutters INC | John Clifford Stahman | — | (949) 595 0300 | GC, remodel, ADU | Lake Forest · Orange County | — | — |
| A B C D Builders INC | Azulay Itamar | — | (818) 968 8810 | GC, remodel, ADU | West Hills · Los Angeles County | — | — |
| A B C Drywall | A B C Drywall | — | (925) 360 3865 | Other | Campbell · Santa Clara County | — | — |
| A B C Electric | Leszek Kazimierz Kondratczyk | — | (949) 254 0863 | Electricians | Palm Desert · Riverside 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 | — | — |