| A's Flooring INC | Sergio Alarid | — | (619) 207 6864 | Other | San Diego · San Diego County | — | — |
| A+ Air Comfort Solutions INC | Gabriel Dominick Rodelo | mn@tritonair.net | (760) 938 6165 | HVAC | Escondido · San Diego County | — | — |
| A+ Landscapes | A+ Landscapes | — | (760) 522 0760 | Windows, patio, painters | Escondido · San Diego County | — | — |
| A+ Professional Painting | Jorge Ricardo Anaya Lugo | — | (619) 962 1607 | Windows, patio, painters | San Diego · San Diego County | — | — |
| A-1 All American Roofing San Diego LLC | Gregory Alexander Savran | — | (858) 537 5177 | Other roofers | San Diego · San Diego County | — | — |
| A-1 Concrete Pumping INC | Tim Shawn Regan | mattsmith@a1pumpcrete.com | (619) 206 7867 | Other | San Diego · San Diego County | — | — |
| A-1 Construction | Berg Rene | — | (619) 855 2677 | GC, remodel, ADU | Ocean Beach · San Diego County | — | — |
| A-1 Construction Management | Mezain Omar El | — | (858) 345 0044 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| A-1 Fire Protection INC | Jill Elizabeth Mc Carty | — | (858) 623 2733 | Other | San Diego · San Diego County | — | — |
| A-1 Lock And Safe | A-1 Lock And Safe | — | (760) 431 5397 | Other | Carlsbad · San Diego County | — | — |
| A-1 Plastics Incorporated | James Elde Jr Blakemore | — | (619) 444 9442 | Other | El Cajon · San Diego County | — | — |
| A-1 Pumpcrete INC | Tim Shawn Regan | — | (619) 206 7867 | Other | Poway · San Diego County | — | — |
| A-1 Renovations INC | Torian Jerome Jr Dedmon | — | (619) 496 1166 | GC, remodel, ADU | Spring Valley · San Diego County | — | — |
| A-a General Contracting And Painting | Johnny Ray Gonzales | — | (858) 967 0048 | GC, remodel, ADU | Pine Valley · San Diego County | — | — |
| A-advanced Locksmiths | Kurt Wyatt Smith | — | (858) 277 4358 | Other | San Diego · San Diego County | — | — |
| A-intelec | Demetrius Francesco Duran | form.contact@aintelec.com | (858) 761 6121 | Electricians | San Diego · San Diego County | — | — |
| A-mayer-can Plumbing | David Justin Mayer | — | (760) 277 1167 | Other | El Cajon · San Diego County | — | — |
| A-tex Plumbing | A-tex Plumbing | — | (619) 549 3522 | Other | San Diego · San Diego County | — | — |
| A-turf Services INC | Juan Carlos Arias Flores | — | (619) 757 6838 | Other | San Diego · San Diego County | — | — |
| A/c Doctors Tv INC | Larry Dean Morrow | — | (760) 566 9335 | HVAC | Oceanside · San Diego County | — | — |
| A/s General Contracting | Ali Seyyed Shojai | — | (619) 379 9410 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| A1 Oros Plumbing | A1 Oros Plumbing | — | (619) 962 6941 | Other | Chula Vista · San Diego County | — | — |
| A1 Quality Blinds | Zachary Scott Divine | info@a1qualityblinds.com | (858) 689 9999 | Other | San Diego · San Diego County | — | — |
| A1 Septic Services | Christopher Martin Dilling | — | (858) 776 2675 | Other | El Cajon · San Diego County | — | — |
| A1 Shower Pan INC | Armando Molina | — | (619) 247 6906 | Other | Chula Vista · San Diego County | — | — |
| A10 Garage Door And Gates Repair Services | Dvir Berg | — | (206) 565 7271 | Other | San Diego · San Diego County | — | — |
| A2 Plumbing Systems | A2 Plumbing Systems | — | (619) 820 2248 | Other | Escondido · San Diego County | — | — |
| A2z Home Restoration & Remodeling | A2z Home Restoration & Remodeling | guy@infinitydesignbuild.com | (661) 490 0791 | GC, remodel, ADU | Oceanside · San Diego County | — | — |
| A2z Rebuilders | A2z Rebuilders | — | (858) 568 2022 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| A3 Construction | Armando Jr Aparicio | — | (619) 551 3297 | Other | Chula Vista · San Diego County | — | — |
| A3 Remodeling | Alfredo Jr Flores | — | (619) 772 3545 | GC, remodel, ADU | Chula Vista · San Diego County | — | — |
| Aa Bronco Concrete | Aa Bronco Concrete | — | (619) 920 8894 | Other | San Diego · San Diego County | — | — |
| Aa Construction | Andree Alexis Nunura | — | (619) 273 9823 | GC, remodel, ADU | Chula Vista · San Diego County | — | — |
| Aa Construction Home Improvement | Arian Soltanian | — | (858) 722 0407 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Aa Plumbing Services | Antonio Terrell Arnold | — | (619) 496 1093 | Other | San Diego · San Diego County | — | — |
| Aa Sky Construction INC | Rafael Gonzalez Lujano | buildzoomsupport@blockrenovation.com | (858) 888 3752 | GC, remodel, ADU | San Marcos · San Diego County | — | — |
| Aa Welding | Aa Welding | — | (760) 715 0107 | Other | Escondido · San Diego County | — | — |
| Aaa Electrical Solutions Sd LLC | Armando Jr Ramirez | — | (858) 603 7930 | Electricians | San Diego · San Diego County | — | — |
| Aaa Freedom Restoration INC | Ashley Ann Whitaker | — | (951) 572 2000 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Aaa Hardscapesd | Andres Navarro-Calderon | — | (760) 977 0300 | Windows, patio, painters | Vista · San Diego County | — | — |