| American Pacific Constructors INC | Ian Nathaniel Dethloff | — | (760) 637 2184 | GC, remodel, ADU | Oceanside · San Diego County | — | — |
| American Painting | American Painting | — | (760) 580 9011 | Windows, patio, painters | San Diego · San Diego County | — | — |
| American Painting | American Painting | — | (619) 403 0022 | Windows, patio, painters | San Diego · San Diego County | — | — |
| American Painting | San Diego House Painting | American Painting | San Diego House Painting | — | (858) 255-4565 | Windows, patio, painters | San Diego · San Diego County | — | — |
| American Patriot Landscaping | American Patriot Landscaping | — | (760) 716 4619 | Windows, patio, painters | Bonsall · San Diego County | — | — |
| American Performance Services | Jorge Javier Paullada | — | (619) 823 4763 | Other | San Diego · San Diego County | — | — |
| American Plumbing | American Plumbing | — | (619) 723 1114 | Other | San Diego · San Diego County | — | — |
| American Plumbing Group INC | Ryan William Rothermel | — | (619) 534 7034 | Other | San Diego · San Diego County | — | — |
| American Plumbing Heating & Air Conditioning | Jesus Ramon Quinonez | — | (760) 731 7000 | HVAC | Oceanside · San Diego County | — | — |
| American Polo Remodeling | American Polo Remodeling | — | (619) 813 8218 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| American Pride Tree Service INC | Gomez Javier Sanchez | — | (619) 243 4832 | Tree | El Cajon · San Diego County | — | — |
| American Pro - Coating LLC | Joseph| Martine Z Jose De Jesus Martinez | — | (760) 845 2999 | GC, remodel, ADU | Vista · San Diego County | — | — |
| American Pro Design & Remodeling INC | Michael Donald Leraas | buildzoomsupport@blockrenovation.com | (858) 585 3388 | GC, remodel, ADU | Vista · San Diego County | — | — |
| American Quality Remodeling INC | Hajaj Ziv | — | (888) 988 8277 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| American Raingutters | American Raingutters | — | (760) 271 9902 | GC, remodel, ADU | Oceanside · San Diego County | — | — |
| American Response Team Restoration LLC | William Paul Henley | — | (858) 750 5359 | GC, remodel, ADU | Vista · San Diego County | — | — |
| American Roofing Service INC | Laura Azucena Garcia | buildzoomsupport@blockrenovation.com | (619) 750 8768 | Other roofers | Spring Valley · San Diego County | — | — |
| American Signal & Lighting INC | James Charles Perry | — | (909) 721 4028 | Electricians | Fallbrook · San Diego County | — | — |
| American Sod Farms LLC | Kenneth James Fox | info@americansodfarms.com | (760) 738 9112 | Windows, patio, painters | Escondido · San Diego County | — | — |
| American Titan Heating & Air INC | Gema Melissa Mendivil | steved@precision-ac.com | (619) 251 9767 | HVAC | San Ysidro · San Diego County | — | — |
| American Traffic Force INC | Neil Jonathan Treffers | — | (760) 906 6961 | Other | Ramona · San Diego County | — | — |
| American Vision Garage Doors INC | Ivan Govea | — | (619) 201 2212 | Other | Jamul · San Diego County | — | — |
| American Vision Windows | American Vision Windows | — | (858) 264-2512 | Windows, patio, painters | San Diego · San Diego County | — | — |
| American West Construction INC | Cecil Morris Wilson | — | (760) 583 3743 | Electricians | Fallbrook · San Diego County | — | — |
| Americas Finest Garage Door & Gate INC | Carlos Reynaldo Murillo | — | (858) 900 8200 | Other | San Diego · San Diego County | — | — |
| Americas Finest Pools | Americas Finest Pools | — | (619) 520 2567 | Pool | Lakeside · San Diego County | — | — |
| Americas Finest Security Design Low Voltage | Eddie Garcia Barboza | — | (619) 907 3084 | Alarm and generators | San Diego · San Diego County | — | — |
| Americas Plumber | Americas Plumber | — | (858) 735 0076 | Other | Escondido · San Diego County | — | — |
| Americas Trusted Plumbing LLC | Abraham Torres | — | (619) 675 5935 | Other | Chula Vista · San Diego County | — | — |
| Americonstruction INC | Akram Moueen Attie | — | (619) 954 3536 | GC, remodel, ADU | Escondido · San Diego County | — | — |
| Ameriforce INC | Michael Louis Pagano | — | (619) 368 4356 | Other | Vista · San Diego County | — | — |
| Ameriscape Landscape Corporation | Abdul Rahman Malas | — | (619) 780 6145 | Windows, patio, painters | San Diego · San Diego County | — | — |
| Ameritechs | Robert Whitter Dudley | — | (858) 505 1122 | Other | San Diego · San Diego County | — | — |
| Amerivet Contracting DBA Amerivet | Drew Anthony Simpson | — | (858) 208-3638 | GC, remodel, ADU | National City · San Diego County | — | — |
| Ames Mobile Welding | Ames Mobile Welding | — | (619) 586 1753 | Other | San Diego · San Diego County | — | — |
| Amezola Electric Company LLC | Jose Iii Amezola | — | (619) 948 3797 | Electricians | Chula Vista · San Diego County | — | — |
| Amg Construction 1987 LLC | Marquez Garcia Adrian | info@amg-construction.co.uk | (619) 765 9858 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Amg Drywall INC | Oscar Alonso Garcia Medrano | — | (858) 837 7673 | Other | Vista · San Diego County | — | — |
| Amg Ggg A Jv | G G Demolition INC G | — | (619) 501 7427 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Amg Prop Maintenance INC | Kevin Edward Jr Gresiak | — | (858) 354 1651 | GC, remodel, ADU | San Diego · San Diego County | — | — |