| Air Trend | Air Trend | — | (818) 700 1255 | HVAC | Simi Valley · Ventura County | — | — |
| Air-fab Services INC | Jaime Rubalcaba Jr Sandoval | airfabservices@gmail.com | (805) 666 9750 | HVAC | Simi Valley · Ventura County | — | — |
| Aire Comfort INC | John Bruce Pelkola | — | (805) 797 9968 | HVAC | Ventura · Ventura County | — | — |
| Aire Serv Of Camarillo | Jennifer Lynn Skare | — | (805) 482 1196 | HVAC | Oxnard · Ventura County | — | — |
| Airtek H V A C | Airtek H V A C | — | (615) 554 5994 | HVAC | Simi Valley · Ventura County | — | — |
| Airway Glass | Airway Glass | lemonad@jovanny.ru | (805) 643-8988 | Windows, patio, painters | Ventura · Ventura County | — | — |
| Airworks Heating Air Plumbing | Airworks Heating Air Plumbing | info@airworkssolutions.com | (805) 312-9539 | HVAC | Somis · Ventura County | — | — |
| Airworks Solutions INC | Kevin Tanner Allen | info@airworkssolutions.com | (805) 754 6468 | HVAC | Camarillo · Ventura County | — | — |
| Aj Drywall Systems INC | Aparicio Orozco Jesus | — | (805) 223 4238 | Other | Oxnard · Ventura County | — | — |
| Aj Netcon LLC | Jorge Luis Dios | — | (805) 297 6813 | Other | Camarillo · Ventura County | — | — |
| Aj's Heating & Air | Aj's Heating & Air | — | (805) 794 7983 | HVAC | Ventura · Ventura County | — | — |
| Ajc Stone Restoration And Mold Remediation | Juan Carlos Garcia | — | (805) 844 9458 | Restoration | Camarillo · Ventura County | — | — |
| Aje Programming | Alfredo Javier Menendez Rosales | — | (818) 279 1871 | Other | Simi Valley · Ventura County | — | — |
| Ajp Builders INC | Anthony Jordan Perez | — | (805) 625 1030 | Other roofers | Santa Paula · Ventura County | — | — |
| Akari Electric | Paul Robert Kriz | — | (805) 729 7946 | Electricians | Ventura · Ventura County | — | — |
| Akeson Construction INC | Patrick Raymond Akeson | — | (805) 980 8842 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| Al Garza Drywall | Al Garza Drywall | — | (805) 583 2553 | Other | Simi Valley · Ventura County | — | — |
| Al Lowe Construction | Patrick James Shanahan | inquiries@alloweconstruction.com | (805) 604 1104 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| Al Lowe INC | Albert Huei-Hua Lowe | al@allowe.com | (805) 797 6830 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| Al's Tree Service & Landscapes LLC | Alvaro Pacheco Avila | — | (805) 279 6462 | Tree | Camarillo · Ventura County | — | — |
| Alan Barlam Plumbing | Alan Barlam Plumbing | — | (805) 985 4706 | Other | Oxnard · Ventura County | — | — |
| Alan K Clausen | Alan K Clausen | — | (310) 496 9316 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| Alan Sommerhauser Construction INC | Alan Joseph Sommerhauser | — | (805) 796 1004 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| Alan T Miklovich Electric | Alan Tom Miklovich | — | (818) 269 7269 | Electricians | Oxnard · Ventura County | — | — |
| Alan Thompson | Alan Thompson | — | (805) 241 0635 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Alana Busse Construction | Alana Anastasia Busse | alana@alanabusseconstruction.com | (805) 501 5406 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Alborz Construction INC | Michael Hossein Gholmakani | — | (661) 747 4627 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Alcotana Construction INC | Thierry Edward D'huart | — | (805) 603 9970 | Other | Ventura · Ventura County | — | — |
| Aldana Floor Covering | Aldana Floor Covering | — | (818) 425 5995 | Other | Simi Valley · Ventura County | — | — |
| Alden Kaplan Construction | Alden Jeffrey Kaplan | — | (805) 207 7060 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Aldersgate Construction INC | Michael Thomas Wagemann | — | (805) 988 4114 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| Aldsbvtr | Andrew Raymond Meckley | — | (805) 965 1000 | Other | Ventura · Ventura County | — | — |
| Alejandro Exequiel Velasco | Alejandro Exequiel Velasco | — | (805) 415 4992 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| Alejandro Romero Ramirez | Alejandro Romero Ramirez | — | (805) 279 3715 | Other | Oxnard · Ventura County | — | — |
| Alert 1 Environmental | Ernesto Pelayo Gutierrez | — | (855) 287 6736 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Alex Marble & Tile INC | Alec| Chmonine Oleg Vladimirovic Benke | — | (805) 987 4154 | Other | Camarillo · Ventura County | — | — |
| Alex Shaw Home Imrovement | Alex Shaw Home Imrovement | — | (661) 713 8929 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Alex Zaragoza | Alex Zaragoza | — | (805) 207 8521 | Other | Oxnard · Ventura County | — | — |
| Alexander General Construction | Elvin Alexander Penate Martinez | — | (805) 390 9211 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Alfa Construction | Alfonso Fabian Gonzalez | — | (818) 554 0220 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |