| Albert's Landscaping | Albert's Landscaping | — | (619) 423 9665 | Windows, patio, painters | San Diego · San Diego County | — | — |
| Alberto Hernandez | Alberto Hernandez | — | (619) 200 1006 | GC, remodel, ADU | National City · San Diego County | — | — |
| Alberto's Painting And Coatings | Alberto's Painting And Coatings | — | (619) 587 5366 | Windows, patio, painters | National City · San Diego County | — | — |
| Albin Electric | Richard Ray Albin | contact@claycoelectric.org | (619) 871 8980 | Electricians | Santee · San Diego County | — | — |
| Albright Design And Construction | Victor Ha Albright | — | (858) 449 8309 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Albright General Contracting | Jason Devern Albright | — | (619) 558 8470 | GC, remodel, ADU | Campo · San Diego County | — | — |
| Albritton Painting | Albritton Painting | — | (760) 522 5643 | Windows, patio, painters | Valley Center · San Diego County | — | — |
| Alcaide's Drywall INC | Eva Alcaide | — | (619) 672 3009 | Other | San Diego · San Diego County | — | — |
| Alcala Builders INC | Cesar David Alcala-Velazquez | — | (619) 710 6332 | GC, remodel, ADU | Chula Vista · San Diego County | — | — |
| Alcala Smart Construction INC | Beltran Ignacio Alcala | alcalasmartconstruction@gmail.com | (760) 277 3782 | GC, remodel, ADU | Vista · San Diego County | — | — |
| Alcantara General Engineering INC | Jesus Martinez Alcantara | — | (619) 262 2961 | Other | San Diego · San Diego County | — | — |
| Alcaraz Design + Build | Abril Alcaraz | — | (619) 536 4974 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Alcatraz Innovations DBA Alcatraz Locksmith | Antonio Cisco Gudino | — | (619) 426 1800 | Other | Chula Vista · San Diego County | — | — |
| Alcoa Signage | Alcoa Signage | — | (858) 547 9755 | Other | San Diego · San Diego County | — | — |
| Alden Viggo Pedersen | Alden Viggo Pedersen | — | (619) 421 7119 | Windows, patio, painters | San Diego · San Diego County | — | — |
| Aldrich's Construction Services | Harland Jason Aldrich | — | (619) 300 5441 | GC, remodel, ADU | Jamul · San Diego County | — | — |
| Alec Mackenzie General Contractor | Alec Mackenzie General Contractor | — | (619) 417 2650 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Alef Audio Video | Kjell Ernie Osness | amkryukov@gmail.com | (858) 883 8887 | Other | Escondido · San Diego County | — | — |
| Alef Plumbing INC | Anastasiia Khazanova | office@alefplumbing.com | (858) 208-3393 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Alegre Construction | Sandoval Fernando | — | (760) 458 7500 | GC, remodel, ADU | Carlsbad · San Diego County | — | — |
| Alegria Builders INC | Alderban Osbaldo Chavez Aispuro | alegria.builders.inc@gmail.com | (760) 670 8898 | GC, remodel, ADU | Escondido · San Diego County | — | — |
| Alejandro Jesus Sanchez | Alejandro Jesus Sanchez | jlvplumbing82@yahoo.com | (619) 520 1504 | HVAC | National City · San Diego County | — | — |
| Alejo & Son Concrete | Jose Manuel Alejo | — | (619) 677 9076 | Other | Lemon Grove · San Diego County | — | — |
| Alen Construction | Kazem Shawn Aslanian | — | (619) 851 0989 | GC, remodel, ADU | La Jolla · San Diego County | — | — |
| Alena Brooks Blasio | Alena Brooks Blasio | — | (760) 729 3965 | GC, remodel, ADU | Carlsbad · San Diego County | — | — |
| Alert 360 Home & Business Security San Diego | Alert 360 Home & Business Security San Diego | — | (619) 378-1055 | Alarm and generators | San Diego · San Diego County | — | — |
| Alert Plumbing & Drains INC | Rogelio Ramirez Garcia | — | (619) 890 4311 | Other | Chula Vista · San Diego County | — | — |
| Alessi Builders INC | Joseph Anthony Alessi | — | (760) 233 1095 | GC, remodel, ADU | Escondido · San Diego County | — | — |
| Alessio Heating & Air INC | Paul Anthony Alessio | alessioair@outlook.com | (760) 489 2299 | HVAC | Escondido · San Diego County | — | — |
| Aleto Unlimited INC | Anthony Scott Aleto | aqremodeling2@gmail.com | (619) 571 2865 | GC, remodel, ADU | La Mesa · San Diego County | — | — |
| Alex & Son Construction | Alejandro Lopez-Velarde | — | (619) 778 9857 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Alex Bondorenko | Alex Bondorenko | — | (858) 880 6388 | Other | Oceanside · San Diego County | — | — |
| Alex Grins Windows | Alex Grins Windows | — | (619) 518 2492 | Windows, patio, painters | Encinitas · San Diego County | — | — |
| Alex Lopez Electric | Pedro Alejandro Lopez | — | (619) 549 7402 | Electricians | Chula Vista · San Diego County | — | — |
| Alex P Carolino Jr | Alex P Carolino Jr | — | (619) 434 9200 | Other | National City · San Diego County | — | — |
| Alex P Gomez Painting | Alex P Gomez Painting | — | (858) 883 7767 | Windows, patio, painters | Ramona · San Diego County | — | — |
| Alex Tile | Alex Tile | — | (619) 944 7164 | Other | San Diego · San Diego County | — | — |
| Alex Tree Service | Mejia Huerta Alejandro | — | (858) 568 1850 | Tree | San Diego · San Diego County | — | — |
| Alex Valino | Alex Valino | — | (619) 933 0825 | GC, remodel, ADU | Bonita · San Diego County | — | — |
| Alexander Acoustics | Alexander Acoustics | — | (619) 778 3489 | Other | San Diego · San Diego County | — | — |