| All Star Locksmith | All Star Locksmith | — | (619) 251 6161 | Other | Spring Valley · San Diego County | — | — |
| All Star Painting Co | Christopher John Cena | — | (619) 252 0799 | GC, remodel, ADU | Imperial Beach · San Diego County | — | — |
| All Star Plumbing Sd INC | Robert Scott Prather | allstarplumbingsd@gmail.com | (619) 387 6112 | Other | Alpine · San Diego County | — | — |
| All Star Signs INC | Michael Lawrence Cohen | — | (760) 746 6555 | Other | Escondido · San Diego County | — | — |
| All Star Tile | All Star Tile | — | (858) 625 1417 | Other | San Diego · San Diego County | — | — |
| All Stylish INC | Meysam Mirzazadeh | — | (619) 800 0935 | Other | San Diego · San Diego County | — | — |
| All Surface Roofing & Waterproofing INC DBA Asr | John Francis Kidwell | — | (509) 279 8095 | Other roofers | El Cajon · San Diego County | — | — |
| All Systems Plumbing | All Systems Plumbing | — | (760) 580 7403 | Other | Escondido · San Diego County | — | — |
| All Tech Services Elite | Irving Michael Hoffman | — | (619) 279 7915 | GC, remodel, ADU | Chula Vista · San Diego County | — | — |
| All Tek Drywall INC | Flavio Jose Mora | — | (760) 207 4464 | Other | Vista · San Diego County | — | — |
| All Temp Mechanical INC | Pedro Osiel Ruiz Duran | mn@tritonair.net | (760) 270 7827 | HVAC | Escondido · San Diego County | — | — |
| All Terrain Landscaping & Design INC | Arias Rodriguez Jesus | — | (760) 315 3864 | Windows, patio, painters | Borrego Springs · San Diego County | — | — |
| All The Way Live Electric LLC | Jeremy James Soellner | contact@claycoelectric.org | (858) 222 9436 | Electricians | National City · San Diego County | — | — |
| All Things Plumbing & Leak Detection | Anthony James Lopez | — | (760) 520 4401 | Other | Escondido · San Diego County | — | — |
| All Time Fence Company INC | Santos Israel Magallanes | — | (760) 740 9070 | GC, remodel, ADU | Escondido · San Diego County | — | — |
| All Time Plumbers INC | Peter Andrew Mcnamara | — | (760) 201 6461 | Other | San Diego · San Diego County | — | — |
| All Time Plumbing INC | Ruben Moises Reyes | — | (619) 419 0217 | Other | Santee · San Diego County | — | — |
| All Trades Construction | Thomas Domenic Gabrielli | — | (619) 923 3273 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| All Trades For Painting And Construction | Michael Anthony Cena | — | (619) 934 5901 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| All Tribes Construction | Scott William Deatherage | — | (951) 401 8059 | GC, remodel, ADU | Warner Springs · San Diego County | — | — |
| All Type Fence And Custom Gates | Delgadillo Nunez Salvador | — | (619) 733 9491 | Other | San Diego · San Diego County | — | — |
| All Water Tek INC | Steven Kelly Sebo | — | (619) 719 3265 | Other | Carlsbad · San Diego County | — | — |
| All Weather Air Conditioning & Heating | Terry Lawrence Sr Sanchez | — | (619) 981 4595 | HVAC | Lakeside · San Diego County | — | — |
| All World Construction LLC | Austin David Mitchell | amitchell@allworldconstructions.com | (619) 327 9513 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| All-pro Asphalt Company | Frank Patrick Moran | — | (619) 462 6922 | Other | San Diego · San Diego County | — | — |
| All-pro Quality Garage Doors | Paul Jon Fadden | — | (858) 576 7223 | Other | Santee · San Diego County | — | — |
| All-tech Roofing | Jerry Velasco | — | (619) 397 4565 | Other roofers | Chula Vista · San Diego County | — | — |
| Allan Michaels Construction INC | Stacy Brier Ziman | — | (619) 336 2400 | GC, remodel, ADU | National City · San Diego County | — | — |
| Allcare Design / Build INC | Cervantes Richard | allcarehomes@gmail.com | (619) 462 0133 | GC, remodel, ADU | Spring Valley · San Diego County | — | — |
| Alldredge Builders INC | Andrew Jacob Alldredge | — | (619) 435 1001 | GC, remodel, ADU | Coronado · San Diego County | — | — |
| Allegiance General Contractor & Plumbing INC | Joel Allen Horn | — | (858) 276 7333 | GC, remodel, ADU | El Cajon · San Diego County | — | — |
| Allegiance Heating & Air Conditioning INC | Sarah Kathryn Rotter | marketing@allegiancehvacsd.com | (619) 449 2469 | HVAC | Santee · San Diego County | — | — |
| Allegiant Garage Doors | Allegiant Garage Doors | — | (760) 808 5421 | Other | Vista · San Diego County | — | — |
| Allen Hardwood Flooring | Allen Hardwood Flooring | — | (760) 533 2561 | Other | Vista · San Diego County | — | — |
| Allen Keith Bailey General Contractor | Allen Keith Bailey General Contractor | — | (619) 287 2137 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Allen Landscape INC | Matthew Scott Allen | — | (760) 757 7818 | Windows, patio, painters | Oceanside · San Diego County | — | — |
| Allen Wrench Plumbing INC | Joseph Atsaibeyez Allen | — | (760) 525 1515 | Other | Vista · San Diego County | — | — |
| Allen's Repair And Construction | Roland Lee Allen | — | (760) 518 4463 | GC, remodel, ADU | Vista · San Diego County | — | — |
| Allgire General Contractors INC | Grant Richard Allgire | info@allgire.com | (760) 477 8455 | GC, remodel, ADU | Carlsbad · San Diego County | — | — |
| Alliance Builders INC | Alberto Jr Lomeli | — | (619) 799 9773 | GC, remodel, ADU | Jamul · San Diego County | — | — |