| Alpine Refrigeration | Alpine Refrigeration | — | (805) 496 3228 | HVAC | Simi Valley · Ventura County | — | — |
| Alta Villa Finish Carpentry | Alta Villa Finish Carpentry | — | (805) 679 3870 | Other | Ventura · Ventura County | — | — |
| Alternative Energy Solutions | Alternative Energy Solutions | interested@domainmarket.com | (805) 320 4797 | Electricians | Thousand Oaks · Ventura County | — | — |
| Altmann Construction | James Robert Altmann | — | (818) 667 7086 | GC, remodel, ADU | Somis · Ventura County | — | — |
| Alton Anderson Enterprises LLC | Alton Ray Anderson | — | (805) 432 1246 | Windows, patio, painters | Thousand Oaks · Ventura County | — | — |
| Alv Custom's | Alv Custom's | — | (805) 404 2257 | Other | Simi Valley · Ventura County | — | — |
| Alvarado Custom Cabinets INC | Luis Ramon Alvarado | — | (805) 341 0496 | Other | Moorpark · Ventura County | — | — |
| Alvarado Stone Tile | Alvarado Stone Tile | — | (805) 302 3252 | Other | Oxnard · Ventura County | — | — |
| Alvarez Construction Services INC | Portela Gerardo Mulero | — | (805) 807 3130 | Other | Thousand Oaks · Ventura County | — | — |
| Alvaro Lopez Ramirez | Alvaro Lopez Ramirez | — | (805) 368 8380 | Windows, patio, painters | Oxnard · Ventura County | — | — |
| Am Garage Doors LLC | Hernandez Eduardo | — | (805) 766 4843 | Other | Oxnard · Ventura County | — | — |
| Am-pm Rooter & Plumbing | Damian Alejandro Lopez | — | (805) 340 8031 | Other | Ojai · Ventura County | — | — |
| Ama Builders INC | Anthony Matthew Anzelon | — | (805) 267 6467 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| Amaron Plumbing INC | Steven Roger Parry | — | (805) 522 9986 | Other | Simi Valley · Ventura County | — | — |
| Amaya Building & Remodeling | Amaya Building & Remodeling | — | (805) 234 0750 | GC, remodel, ADU | Ojai · Ventura County | — | — |
| Amber Home Remodeling INC | Yosef Shalom | — | (213) 281 2789 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Ambient Electric INC | Elisha Dan Elder | — | (805) 262 0425 | Electricians | Camarillo · Ventura County | — | — |
| Ambriz Remodeling And Building | Ambriz Remodeling And Building | — | (805) 857 3626 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Ambriz Roofing | Ambriz Baldemar | — | (805) 890 4030 | Other roofers | Santa Paula · Ventura County | — | — |
| Ambrose Electric INC | Brian Christopher Ambrose | — | (818) 348 2437 | Electricians | Oxnard · Ventura County | — | — |
| Amendt Construction | Monte Alan Amendt | flmonte@verizon.net | (805) 218 0432 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| Ameri Spec Home Inspection Services | Ameri Spec Home Inspection Services | — | (805) 604-0346 | Inspectors | Oxnard · Ventura County | — | — |
| Americ Painting | Bonifacio Rigoberto Alvarez Arias | — | (805) 330 7147 | Windows, patio, painters | Oxnard · Ventura County | — | — |
| America's Finish Carpentry | Santa America Mendez | — | (805) 727 6427 | Other | Santa Paula · Ventura County | — | — |
| American Automatic Doors INC | Robert Mitchell Tibbitts | — | (805) 658 7541 | Other | Ventura · Ventura County | — | — |
| American Building Automation INC | Adrian Philip Rosales | — | (805) 658 0165 | HVAC | Ventura · Ventura County | — | — |
| American Building Comfort Services INC | Mark Adolfo Rosales | — | (805) 658 6204 | HVAC | Oxnard · Ventura County | — | — |
| American Construction | Gregory Saldana Ignacio | — | (805) 798 3291 | GC, remodel, ADU | Ojai · Ventura County | — | — |
| American Contractors | Glen Robert Infuso | — | (818) 324 2638 | Electricians | Westlake Village · Ventura County | — | — |
| American Discount Backflow | American Discount Backflow | americandiscountbackflow@yahoo.com | (805) 341 4436 | Other | Thousand Oaks · Ventura County | — | — |
| American Drain Co | Timothy Christopher Braden | — | (818) 792 8649 | Other | Simi Valley · Ventura County | — | — |
| American Drain Company INC | Timothy Christopher Braden | — | (818) 792 8649 | Other | Simi Valley · Ventura County | — | — |
| American Dream Builders | American Dream Builders | — | (805) 279 7929 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| American Electrical Services | Robert Lawrence Houfek | — | (805) 522 9792 | Electricians | Simi Valley · Ventura County | — | — |
| American Glass Experts INC | Bryant Alexis Torres Salinas | — | (818) 426 4649 | Windows, patio, painters | Simi Valley · Ventura County | — | — |
| American Heating & A/c Corp | Jose L Solorzano | — | (626) 285 8206 | HVAC | Simi Valley · Ventura County | — | — |
| American Heating & Cooling | American Heating & Cooling | — | (805) 216 0954 | HVAC | Camarillo · Ventura County | — | — |
| American Horizon Construction INC | Francisco Juan Ochoa Juvel | americanhorizoninc@gmail.com | (805) 815 7061 | Electricians | Oxnard · Ventura County | — | — |
| American Icon Landscape | American Icon Landscape | — | (805) 207 6102 | Windows, patio, painters | Camarillo · Ventura County | — | — |
| American Investments Construction Services | David Heracleo Russian | — | (805) 216 2232 | GC, remodel, ADU | Ventura · Ventura County | — | — |