| Avitia Brothers Construction INC | Jesus Silvano Jr Avitia Rosales | — | (619) 490 6696 | GC, remodel, ADU | Lakeside · San Diego County | — | — |
| Avl Roofing INC | Vincent Alfred Leone | — | (619) 561 6555 | Other roofers | El Cajon · San Diego County | — | — |
| Avok Construction | Sergio Emmanuel Pedroza | — | (760) 845 0749 | GC, remodel, ADU | Escondido · San Diego County | — | — |
| Aw Home INC | Anna Sihan Wang | — | (858) 997 7973 | GC, remodel, ADU | La Mesa · San Diego County | — | — |
| Awake Construction LLC | Kevin Raymond Baker | — | (858) 603 8509 | GC, remodel, ADU | Vista · San Diego County | — | — |
| Award Renovations | Award Renovations | — | (619) 933 2133 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Award Sign Company | Francis Lope Pena Rivera | — | (619) 278 8450 | Other | Chula Vista · San Diego County | — | — |
| Award Winning Painting And Decorating | Danny Jesus Huerta | — | (619) 917 7002 | Windows, patio, painters | Spring Valley · San Diego County | — | — |
| Awesome Air | Awesome Air | — | (760) 818 9752 | HVAC | Escondido · San Diego County | — | — |
| Awesome Building Solutions INC | Tibor Frank| Sisko Tibor Frank Rozgonyi | — | (650) 465 0399 | GC, remodel, ADU | Vista · San Diego County | — | — |
| Awesome Plumbing | Awesome Plumbing | — | (760) 637 6088 | Other | Escondido · San Diego County | — | — |
| Awning Angel INC | Andrew Ray Herrera | info@awningangel.com | (619) 330 0101 | Other | National City · San Diego County | — | — |
| Awning Products Unlimited INC | Marion Claud Bibbey | tom@awningproductssd.com | (619) 562 2805 | Other | Santee · San Diego County | — | — |
| Ax Roofing | Martinez Sanchez Rodolfo | info@christianroofing.com | (858) 213 5720 | Other roofers | Ramona · San Diego County | — | — |
| Axcel Construction | Celis Alex | aqremodeling2@gmail.com | (619) 754 6903 | GC, remodel, ADU | Chula Vista · San Diego County | — | — |
| Axellent Construction INC | Axel Eduardo Calderon | — | (760) 802 1289 | GC, remodel, ADU | Oceanside · San Diego County | — | — |
| Axeman Pool Care | Jeremy David Axelson | — | (619) 626 3199 | Pool | Lakeside · San Diego County | — | — |
| Axion Construction INC | Christopher Anthony| Morales Christopher Anthony Hernandez | info@axion-construction.org | (619) 345 4390 | Electricians | San Diego · San Diego County | — | — |
| Axium Electric INC | Jandt Auvil Stephan | contact@claycoelectric.org | (619) 247 3322 | Electricians | Lemon Grove · San Diego County | — | — |
| Ay Remodeling & Construction INC | Yaowei Tsai | guy@infinitydesignbuild.com | (858) 335 9391 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Ayad Marooki Heating And Air Conditioning LLC | Ayad Dawood Marooki | — | (619) 569 9947 | HVAC | El Cajon · San Diego County | — | — |
| Ayad's Quality House Painting | Ayad's Quality House Painting | — | (760) 429 3608 | Windows, patio, painters | Carlsbad · San Diego County | — | — |
| Ayala Construction | Vazquez Raul Ayala | — | (619) 674 8137 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Ayala Pro Builders INC | Vazquez Raul Ayala | — | (619) 381 8771 | GC, remodel, ADU | Spring Valley · San Diego County | — | — |
| Ayala Remodeling INC | Miguel Angel Ayala | guy@infinitydesignbuild.com | (619) 484 3559 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Aycon INC | Ali Ilker Abdulhayoglu | estimating@ayconinc.com | (858) 531 2312 | Other | Carlsbad · San Diego County | — | — |
| Ayd Electric | Jalali Aydin | eddie.haro@electricare.com | (858) 733 0102 | Electricians | San Diego · San Diego County | — | — |
| Ayers General Contracting INC | Donald James Ayers | — | (619) 820 6795 | GC, remodel, ADU | El Cajon · San Diego County | — | — |
| Az Remodeling Construction Corp | Golshani Buick | — | (760) 539 2961 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Azad Abbasi | Azad Abbasi | eddie.haro@electricare.com | (619) 805 6468 | HVAC | La Jolla · San Diego County | — | — |
| Azaleawood Landscape Co | Ruben Rene Sotelo | — | (760) 643 2314 | Windows, patio, painters | Vista · San Diego County | — | — |
| Azar Builders INC | Peter Joseph Azar | — | (619) 454 2348 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Azh Builder INC | Rodriguez Samuel | — | (619) 202 0679 | GC, remodel, ADU | National City · San Diego County | — | — |
| Azs Construction | Casey Sterling Mccaskill | — | (760) 265 8747 | GC, remodel, ADU | San Marcos · San Diego County | — | — |
| Aztec Arbor Care | Ramon Eugene Aguilar | — | (800) 527 9010 | Windows, patio, painters | Lemon Grove · San Diego County | — | — |
| Aztec Building Operations INC | Emilie Rene Nazaroff | — | (760) 685 2190 | GC, remodel, ADU | Escondido · San Diego County | — | — |
| Aztec Fence Co Ii INC | Mario Monroy | — | (619) 282 5717 | Other | Lemon Grove · San Diego County | — | — |
| Aztec H20 Services | Stephen Joseph Marzinotto | — | (760) 809 1684 | Other | Escondido · San Diego County | — | — |
| Aztec Landscaping INC | Ramon Eugene Aguilar | i.magarciaa@gmail.com | (619) 464 3303 | GC, remodel, ADU | Lemon Grove · San Diego County | — | — |
| Aztec Painting | Aztec Painting | — | (858) 232 2468 | Windows, patio, painters | San Diego · San Diego County | — | — |