| 3H Electric INC | Hugo Andres Sanchez | — | (760) 879 8370 | Electricians | Imperial · Imperial County | — | — |
| 3J Restoration LLC | Guillermo Rubio | — | (760) 890 5454 | GC, remodel, ADU | Calexico · Imperial County | — | — |
| 3r1 Builders INC | Russell Howard Roben | — | (760) 335 5600 | Electricians | Imperial · Imperial County | — | — |
| 911 Plumbing | 911 Plumbing | — | (760) 427 5094 | GC, remodel, ADU | Imperial · Imperial County | — | — |
| A & N Quality Builders INC | Juan G Agatep | — | (760) 337 9488 | GC, remodel, ADU | El Centro · Imperial County | — | — |
| A B General Building | A B General Building | — | (760) 996 4425 | GC, remodel, ADU | Calexico · Imperial County | — | — |
| A M Desert Storm Concrete | Alex Sandoval Madriaga | — | (760) 356 2095 | Other | Holtville · Imperial County | — | — |
| A M Fernandez Drywall & Insulation INC | Angel Manuel Jr Fernandez | — | (760) 353 9265 | GC, remodel, ADU | El Centro · Imperial County | — | — |
| A2z Painting Division Group | Alexis Pedro Sr Acuna | info@a2zpaintingdivisiongroup.com | (760) 645 8020 | Windows, patio, painters | Calexico · Imperial County | — | — |
| Aa Electric INC | Alvarez Velazquez Alfonzo | — | (760) 427 9767 | Electricians | Brawley · Imperial County | — | — |
| Aa-Beekeeper | Live Bee Removal & Relocation | Aa-Beekeeper | Live Bee Removal & Relocation | — | (858) 299-7500 | Pest, tile roofs | San Marcos · Imperial County | — | — |
| Ace Construction & Plumbing INC | Arturo Gomez Ruiz | — | (760) 604 0897 | GC, remodel, ADU | Calexico · Imperial County | — | — |
| Acosta Renovations LLC | Ruben Acosta | — | (760) 336 1198 | GC, remodel, ADU | El Centro · Imperial County | — | — |
| Action Air Conditioning & Heating | Action Air Conditioning & Heating | — | (760) 886 9176 | HVAC | El Centro · Imperial County | — | — |
| Advance Service INC | Alberto Ochoa Gradillas | interested@domainmarket.com | (760) 357 5361 | Windows, patio, painters | El Centro · Imperial County | — | — |
| Advanced Construction Experts | Jose Cruz Velasquez | — | (760) 587 1486 | GC, remodel, ADU | Brawley · Imperial County | — | — |
| Advanced Water Treatment Specialists | Ricardo Arguellez | ricardo.awts@gmail.com | (760) 623-2821 | Other | Brawley · Imperial County | — | — |
| Af Doors | Fernando Cortez-Hernandez | — | (760) 925 2359 | Other | Calexico · Imperial County | — | — |
| Aguirre's Roofing | Aguirre Alfredo | — | (760) 960 5862 | Other roofers | El Centro · Imperial County | — | — |
| Air Comfort Heating & Cooling | Juan| Sanchez Juan Ancelmolopez Sanchez | — | (760) 353 3770 | HVAC | El Centro · Imperial County | — | — |
| Air Comfort Solutions Air Conditioning INC | Steven Jack Gibson | — | (760) 498 0259 | HVAC | Imperial · Imperial County | — | — |
| Air Cool Plus LLC | Humberto Alfonzo Jr Chavez | — | (760) 357 1305 | HVAC | Calexico · Imperial County | — | — |
| Air Force Air Conditioning | Air Force Air Conditioning | — | (760) 357 5155 | HVAC | Calexico · Imperial County | — | — |
| Air Mechanical Systems | Air Mechanical Systems | — | (760) 550 2589 | HVAC | Brawley · Imperial County | — | — |
| Air Solutions Air Conditioning And Heating | Jose Fernando Salgado Zuniga | — | (760) 909 9310 | HVAC | El Centro · Imperial County | — | — |
| Aj Airtech INC | Antonio De Jesus Pecina Flores | — | (760) 618 9165 | HVAC | El Centro · Imperial County | — | — |
| Albert's Electric Solutions | Lemus Flores Alberto | — | (442) 367 8619 | Electricians | Calexico · Imperial County | — | — |
| Alemar Plumbing | Alemar Plumbing | — | (760) 457 5505 | Other | Brawley · Imperial County | — | — |
| Alesa Electric | Alejandro Ignacio Trejo | — | (760) 791 9473 | Electricians | El Centro · Imperial County | — | — |
| All Pro Pest Control | All Pro Pest Control | — | (714) 872-8891 | Pest, tile roofs | Brea · Imperial County | — | — |
| All-American Property Inspection | All-American Property Inspection | — | (619) 865-1490 | Inspectors | Imperial Beach · Imperial County | — | — |
| Alpine Brush Painting Service La Mirada | Alpine Brush Painting Service La Mirada | — | (562) 614-4522 | Windows, patio, painters | La Mirada · Imperial County | — | — |
| Alvarado Construction | Raul Jr Alvarado | — | (760) 562 2773 | GC, remodel, ADU | Calexico · Imperial County | — | — |
| Alvaro Madrid Concrete INC | Alvaro Lopez Madrid | — | (760) 996 5504 | Other | Imperial · Imperial County | — | — |
| Always Clear Pools | Always Clear Pools | — | (760) 601 0118 | Pool | El Centro · Imperial County | — | — |
| Alx Construction | Ordonez Alexander | — | (760) 483 7626 | GC, remodel, ADU | Imperial · Imperial County | — | — |
| Amalgamated Recycling INC | Michael David Mc Kinley | — | (760) 344 8500 | Other | Brawley · Imperial County | — | — |
| Ambient Air Conditioning & Heating | Ambient Air Conditioning & Heating | — | (760) 337 8787 | HVAC | El Centro · Imperial County | — | — |
| American Builders | American Builders | — | (760) 351 6637 | GC, remodel, ADU | El Centro · Imperial County | — | — |
| American Girl Contracting INC | Daryl Curt Dickerson | — | (760) 337 5839 | Other | Heber · Imperial County | — | — |