| American Bathroom Remodelers | Evan Lee Glazer | — | (619) 265 8126 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| American Bathtub Refinishers | Evan Lee Glazer | — | (619) 265 9200 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| American Bobcat & Backhoe Service INC | Jose Gilberto Montano | — | (760) 744 3125 | Other | Vista · San Diego County | — | — |
| American Builders | American Builders | — | (619) 850 7668 | GC, remodel, ADU | El Cajon · San Diego County | — | — |
| American Building Services | Chris Steven Polopolus | — | (949) 275 0550 | GC, remodel, ADU | Fallbrook · San Diego County | — | — |
| American Comfort Services | Jason Nathaniel Baer | — | (619) 501 2636 | HVAC | El Cajon · San Diego County | — | — |
| American Concrete | Anthony Albert Cannariato | — | (760) 471 9907 | Other | Escondido · San Diego County | — | — |
| American Concrete Cutting & Coring INC | Mark Steven Thomas | — | (760) 802 5200 | GC, remodel, ADU | Escondido · San Diego County | — | — |
| American Concrete Specialty Contractor | American Concrete Specialty Contractor | — | (619) 701 7246 | Other | Santee · San Diego County | — | — |
| American Construction | Mark David Alexander | — | (619) 750 9468 | HVAC | San Diego · San Diego County | — | — |
| American Construction & Septic INC | Marcus Jay Collins | — | (619) 520 2041 | Other | Valley Center · San Diego County | — | — |
| American Deck Systems | Vikki Jean Tyree | — | (858) 578 4186 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| American Deluxe Flooring LLC | David Escalante | — | (619) 382 8599 | Other | Chula Vista · San Diego County | — | — |
| American Depot Remodeling & Construction | Louis Michael Marky | — | (858) 518 8295 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| American Development Construction Sd INC | Hector Octavio Medina-miramontes | — | (619) 259 7991 | GC, remodel, ADU | National City · San Diego County | — | — |
| American Door | American Door | — | (619) 646 0099 | Other | Chula Vista · San Diego County | — | — |
| American Eagle Refrigeration | American Eagle Refrigeration | buildzoomsupport@blockrenovation.com | (619) 244 2598 | HVAC | El Cajon · San Diego County | — | — |
| American Eagle Refrigeration AC INC | Nabil Ayoub Toma | buildzoomsupport@blockrenovation.com | (619) 244 2598 | HVAC | El Cajon · San Diego County | — | — |
| American Electric | Michael Edward Ames | contact@claycoelectric.org | (619) 870 4587 | Electricians | El Cajon · San Diego County | — | — |
| American Electrical Integration INC | Anthony Leonard Thompson | — | (760) 560 7088 | Electricians | Escondido · San Diego County | — | — |
| American Energy Consultants INC | Matt Paul Lebrun | — | (760) 445 5386 | Electricians | San Marcos · San Diego County | — | — |
| American Fence Concepts INC | Beau Barton Postal | bpostal@americanfenceconcepts.com | (760) 877 9951 | Other | Fallbrook · San Diego County | — | — |
| American Glass & Mirror Company | Kimbal Mark Miller | — | (760) 434 1752 | Windows, patio, painters | Carlsbad · San Diego County | — | — |
| American Global Technologies INC | Iris Avgil | — | (858) 952 9538 | Electricians | San Diego · San Diego County | — | — |
| American Haulaway | American Haulaway | info@americanhaulaway.com | (619) 543 0375 | Other | San Diego · San Diego County | — | — |
| American Home Butler INC | Todd Behring Wittman | — | (858) 566 2700 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| American Home Garage Door | American Home Garage Door | — | (619) 284 8186 | Other | El Cajon · San Diego County | — | — |
| American Home Tile Stone LLC | Junior Margarito Chavez | — | (619) 581 1992 | Other | National City · San Diego County | — | — |
| American Horizons Ltd | Joseph Charlie Charles | — | (619) 266 2025 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| American HVAC Technology | American HVAC Technology | mn@tritonair.net | (760) 916 3008 | HVAC | San Marcos · San Diego County | — | — |
| American Jv Electric INC | Jorge Sr Velazquez Penaloza | — | (619) 805 7864 | Electricians | Chula Vista · San Diego County | — | — |
| American Landscape | Joseph Andrew Aguilera | info@americanlandscape.com | (619) 885 0152 | Windows, patio, painters | La Mesa · San Diego County | — | — |
| American Landscape Improvements | American Landscape Improvements | — | (760) 580 8678 | Windows, patio, painters | Escondido · San Diego County | — | — |
| American Leak Detection Of South San Diego County | Kenan Alii Sachs | — | (619) 233 5325 | Other | San Diego · San Diego County | — | — |
| American Liberty Flooring INC | Erenas Sarabia Guadalupe | — | (619) 778 9804 | Other | Chula Vista · San Diego County | — | — |
| American Made Construction | Ryan Paul Sturgeon | — | (760) 707 6530 | GC, remodel, ADU | Fallbrook · San Diego County | — | — |
| American Masonry Builders Company | Michael Andrew Mejia | — | (619) 210 5464 | Other | Chula Vista · San Diego County | — | — |
| American Metals Contractor | American Metals Contractor | — | (619) 701 7246 | Other | Santee · San Diego County | — | — |
| American Nrgy Solutions INC | William Andrew Tolley | aqremodeling2@gmail.com | (760) 540 9595 | HVAC | Ramona · San Diego County | — | — |
| American Overhead Doors | American Overhead Doors | — | (619) 443 0703 | Other | Lakeside · San Diego County | — | — |