| A D C Builders | A D C Builders | — | (619) 755 5886 | GC, remodel, ADU | Chula Vista · San Diego County | — | — |
| A D Custom Tile | A D Custom Tile | — | (760) 453 5330 | Other | Oceanside · San Diego County | — | — |
| A D F Builders INC | Aaron David Frankenberger | — | (619) 921 9105 | GC, remodel, ADU | Spring Valley · San Diego County | — | — |
| A D G Automation | Mckay Everett Turnbull | mckayturnbull@me.com | (760) 271 1832 | Other | Carlsbad · San Diego County | — | — |
| A Dub Electric | Andrew Williams Gabriel | — | (408) 242 7188 | Electricians | Oceanside · San Diego County | — | — |
| A Duin - It Roofing & Construction | Robby Lee Duin | — | (760) 633 2488 | Other roofers | Valley Center · San Diego County | — | — |
| A E Audio | Allen Edward Tremble | — | (858) 673 1675 | Electricians | San Diego · San Diego County | — | — |
| A E Building INC | Estrada-bernal Alejandro | — | (888) 213 8453 | HVAC | Chula Vista · San Diego County | — | — |
| A E Carlson Design & Build | Arthur Patrick Espinosa | info@aecdesignandbuild.com | (951) 296 2233 | GC, remodel, ADU | Carlsbad · San Diego County | — | — |
| A E I Construction Engineer Consultants INC | Daniel Munoz | — | (760) 975 5851 | Other | Escondido · San Diego County | — | — |
| A E L Construction INC | Laina Michelle Harris | — | (760) 432 8605 | GC, remodel, ADU | Escondido · San Diego County | — | — |
| A E S Property Services | Richard Kent Albee | — | (619) 520 9705 | Windows, patio, painters | El Cajon · San Diego County | — | — |
| A Frame Construction Company INC | David John Konezny | — | (619) 886 6778 | GC, remodel, ADU | Coronado · San Diego County | — | — |
| A Frame Electric INC | Joshua James Long | — | (619) 805 5088 | Electricians | San Diego · San Diego County | — | — |
| A G A Electric & Consulting Services INC | Mark Barry Appleton | — | (619) 954 1265 | Electricians | San Diego · San Diego County | — | — |
| A G B Electric | Grajeda Buitron Agustin | — | (619) 869 1229 | Electricians | Chula Vista · San Diego County | — | — |
| A G B General Contracting INC | Christopher Stewart Butler | — | (858) 688 5076 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| A G Builders | A G Builders | — | (619) 742 9245 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| A G C Custom Iron Gates | Galindo Ceciliano Alejandro | — | (760) 586 8881 | Other | Escondido · San Diego County | — | — |
| A G Lopez Home Improvements | A G Lopez Home Improvements | aqremodeling2@gmail.com | (619) 933 7240 | GC, remodel, ADU | Santee · San Diego County | — | — |
| A G M Concrete Solutions INC | Albert Gene Mason | — | (619) 864 4823 | Other | Chula Vista · San Diego County | — | — |
| A G M Tile | A G M Tile | — | (760) 481 2634 | Other | Oceanside · San Diego County | — | — |
| A G R Mechanical | A G R Mechanical | — | (619) 977 0271 | HVAC | San Diego · San Diego County | — | — |
| A G Roofing | Gomez Antonio | info@christianroofing.com | (619) 300 8942 | Other roofers | Lakeside · San Diego County | — | — |
| A G Suarez Construction | Suarez Rojas Agustin | aqremodeling2@gmail.com | (619) 265 6201 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| A Glasco INC | Barry L Livengood | — | (619) 670 3000 | Windows, patio, painters | Spring Valley · San Diego County | — | — |
| A Good Roofer INC | Michelle Marie Mosqueda | — | (619) 561 7600 | Other roofers | Lakeside · San Diego County | — | — |
| A H Botter Contracting | Adrian Hermanus Botter | — | (619) 654 6064 | Other | Lakeside · San Diego County | — | — |
| A H Builders & Developers | A H Builders & Developers | — | (619) 843 9016 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| A H G Services | Bruce Gordon Matyas | contato@ahgservices.com | (760) 215 0135 | GC, remodel, ADU | Carlsbad · San Diego County | — | — |
| A H Hopkey Company | Skylar Arthur Hopkey | — | (619) 889 6773 | GC, remodel, ADU | Alpine · San Diego County | — | — |
| A H I Restoration | A H I Restoration | ahi.inc@gmail.com | (619) 571 7507 | GC, remodel, ADU | Chula Vista · San Diego County | — | — |
| A Hahn Construction | Hahn Andreas | — | (760) 415 2272 | GC, remodel, ADU | Oceanside · San Diego County | — | — |
| A Honest Plumber LLC | Bryan Robert Arquieta | — | (909) 659 8515 | Other | San Diego · San Diego County | — | — |
| A I Development | A I Development | — | (323) 449 2539 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| A J Built | A J Built | — | (858) 361 5614 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| A J Criss Industries INC | Anthony John Criss | — | (760) 489 5120 | Windows, patio, painters | Escondido · San Diego County | — | — |
| A J P Construction | Andrzej Jan Polniak | — | (619) 449 8170 | GC, remodel, ADU | Santee · San Diego County | — | — |
| A J S Electric | Adolfo Joe Sanchez | contact@claycoelectric.org | (619) 405 3508 | Electricians | San Diego · San Diego County | — | — |
| A Jf Drywall INC | Jorge A Fierro | — | (760) 802 2807 | Other | Vista · San Diego County | — | — |