| Aer Systems LLC | Joshua Cain Evans | mn@tritonair.net | (760) 840 0492 | HVAC | Carlsbad · San Diego County | — | — |
| Aerco Systems LLC | Jared Mikael Wells | sales@aercosystems.com | (619) 443 3500 | HVAC | San Diego · San Diego County | — | — |
| Aerify Heating And Air | Gaor Aaron Cervantes Lagunas | service@aerifysandiego.com | (619) 734 9949 | HVAC | Lakeside · San Diego County | — | — |
| Aeris Mechanical INC | Alexander P Golubev | mn@tritonair.net | (619) 261 2844 | HVAC | San Diego · San Diego County | — | — |
| Aeroseal Pacific | Brian Francis Laughter | — | (760) 591 3840 | HVAC | Carlsbad · San Diego County | — | — |
| Aerron Builders INC | Aaron Thomas Espinoza | — | (858) 663 1935 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Aesthetic Construction And Remodels INC | Cristian Bustos | aestheticconstruction619@gmail.com | (619) 382 8832 | GC, remodel, ADU | Spring Valley · San Diego County | — | — |
| Aesthetics Electric INC | Carlos Rivera | — | (760) 277 3921 | Electricians | Fallbrook · San Diego County | — | — |
| Aether Telecommunications | Albert Crisantos | — | (661) 510 7786 | Other | San Ysidro · San Diego County | — | — |
| Af General Group INC | Jose Abdiel Arellano Cabral | — | (858) 784 1692 | GC, remodel, ADU | National City · San Diego County | — | — |
| Afeco INC DBA Fire Etc | David Joseph Duea | — | (619) 525 7286 | Electricians | San Diego · San Diego County | — | — |
| Affinity Development | Affinity Development | — | (619) 384 6971 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Affinity Fence & Gate | Affinity Fence & Gate | contactus@affinityfencegate.com | (858) 270 4878 | Other | San Diego · San Diego County | — | — |
| Affordable A/c | Affordable A/c | affordable.ac.sd@gmail.com | (760) 723 4445 | Electricians | Fallbrook · San Diego County | — | — |
| Affordable Bath Refinishing INC | Jorge Enrique Dominguez | — | (619) 796 8242 | Other | San Diego · San Diego County | — | — |
| Affordable Construction Co | Allan Purificacion Sarno | — | (619) 508 7429 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Affordable Custom Carpentry | Affordable Custom Carpentry | — | (619) 920 2626 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Affordable Design And Remodel INC | David Allen | info@affordabledesignandremodel.com | (760) 277 0407 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Affordable Drain And Pipeline Services LLC | Jacob Sean Digenan | — | (858) 689 4000 | Other | Poway · San Diego County | — | — |
| Affordable Earthworks INC | Kevin Peter Mccafferty | — | (619) 816 6183 | Windows, patio, painters | Lakeside · San Diego County | — | — |
| Affordable Electric | Matthew Del Griffin | — | (760) 580 7136 | Electricians | Escondido · San Diego County | — | — |
| Affordable Flooring Solutions | Luis Alberto Sr Garcia | — | (760) 638 3250 | Other | Valley Center · San Diego County | — | — |
| Affordable Glass And Window | Affordable Glass And Window | — | (619) 241 1373 | Windows, patio, painters | Santee · San Diego County | — | — |
| Affordable Kitchens And Baths | Shawn Paul Davis | — | (858) 354 4554 | GC, remodel, ADU | Santee · San Diego County | — | — |
| Affordable Kitchens And Baths | Shawn Paul Davis | — | (858) 354 4554 | GC, remodel, ADU | Santee · San Diego County | — | — |
| Affordable Landscape | Affordable Landscape | — | (619) 587 7052 | Windows, patio, painters | San Diego · San Diego County | — | — |
| Affordable Leak Defense | Scott Brent Waggoner | affordableleakdefense@gmail.com | (760) 717 5879 | Other | Carlsbad · San Diego County | — | — |
| Affordable Raingutters | Robert Scott Archibald | — | (619) 469 0400 | Other | Lakeside · San Diego County | — | — |
| Affordable Service Appliance INC | Nikolay Erokhin | — | (858) 672 6288 | HVAC | San Diego · San Diego County | — | — |
| Affordable Turn Key Construction | John Barton Mills | — | (760) 297 1305 | GC, remodel, ADU | Valley Center · San Diego County | — | — |
| Afterhours Heating & Air Conditioning | Afterhours Heating & Air Conditioning | steved@precision-ac.com | (619) 357 8279 | HVAC | Alpine · San Diego County | — | — |
| Afuera Landscape Designs INC | Francisco Sanchez Segura | — | (760) 805 7750 | Windows, patio, painters | Vista · San Diego County | — | — |
| Ag Coastal Heating And Air LLC | Alexander Jonathan Garcia | — | (760) 264 3262 | HVAC | Oceanside · San Diego County | — | — |
| Ag Commercial Flooring INC | Enrique Garcia | — | (619) 348 2695 | Other | San Diego · San Diego County | — | — |
| Ag Construction And Electric | Godinez Antonio | — | (831) 902 6210 | Electricians | Alpine · San Diego County | — | — |
| Ag Home Remodeling | Ag Home Remodeling | guy@infinitydesignbuild.com | (619) 249 5726 | GC, remodel, ADU | San Marcos · San Diego County | — | — |
| Ag Pro Drywall | Jose Angel Aguirre Avila | — | (619) 376 7943 | Other | El Cajon · San Diego County | — | — |
| Ag Solutions | Ag Solutions | — | (619) 443 4605 | Other | El Cajon · San Diego County | — | — |
| Agair Enterprises INC | Aleksei Geringer | — | (619) 559 4724 | HVAC | San Diego · San Diego County | — | — |
| Agape Plumbing Services LLC | Fernando Gamboa | — | (619) 513 6149 | Other | Chula Vista · San Diego County | — | — |