| Advanced Doors & Windows INC DBA Clear Choice - U S A Windows & | William Clair Jr Meneray | — | (805) 583 5992 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Advanced Electric | Advanced Electric | — | (805) 732-9494 | Electricians | Ventura · Ventura County | — | — |
| Advanced Electric Enterprises INC | Wendell Milo Roberts | — | (805) 644 1708 | Electricians | Ventura · Ventura County | — | — |
| Advanced Performance Heating And Air Conditioning | Gregory Daryl Weiss | — | (805) 813 8855 | HVAC | Camarillo · Ventura County | — | — |
| Advanced Plastering Systems INC | Thomas Stephen Daniels | — | (805) 453 1666 | Other | Ventura · Ventura County | — | — |
| Advanced Pool & Spa Service INC | Nicholas Joseph Cirocco | — | (805) 750 8013 | Pool | Simi Valley · Ventura County | — | — |
| Advanced Power Systems | Advanced Power Systems | — | (805) 987 0311 | Electricians | Camarillo · Ventura County | — | — |
| Advanced Quality Contractors LLC | Jerald Glen Huffman | — | (805) 600 1107 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| Advanced Sanitation | Sebastian Czaplicki | estimates@advancedsanitation.com | (805) 484 3282 | Other | Camarillo · Ventura County | — | — |
| Advanced Water Solutions INC | Jay James Hellenbrand | contact@advancedwatersolutions.com | (805) 385 4740 | Other | Oxnard · Ventura County | — | — |
| Aeterna Energy LLC | Ronald Joseph Harris | — | (805) 823 3232 | HVAC | Simi Valley · Ventura County | — | — |
| Affordable Dreams Remodeling INC | Javier Perez Delgadillo | — | (888) 405 8880 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Affordable Electric INC | Michael Estrada | — | (805) 256 0849 | Electricians | Santa Paula · Ventura County | — | — |
| Affordable Electricians INC DBA Spears Electrical | Richard Allen Spears | — | (805) 340 3508 | Electricians | Ventura · Ventura County | — | — |
| Affordable Handyman Service | Mark Jerome Lubin | — | (805) 581 5883 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Affordable Quality Painting | Twofeather Sandi | aqp.inc@yahoo.com | (805) 797 6885 | Windows, patio, painters | Camarillo · Ventura County | — | — |
| Ag And Son Construction INC | Gonzalez Artemio | — | (805) 843 7107 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| Ag Ent INC | Antonio Eduardo Ferrari | — | (805) 886 9448 | Other | Oxnard · Ventura County | — | — |
| Agon Landscaping | Agon Landscaping | — | (805) 754 5242 | Windows, patio, painters | Port Hueneme · Ventura County | — | — |
| Agor Construction | Scott Christopher Agor | — | (805) 428 5568 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Agoura Construction And Inspection Services | Majid Motazed Monajemi | — | (818) 400 5209 | GC, remodel, ADU | Moorpark · Ventura County | — | — |
| Agoura Painting INC | Andreas Panagiotakopoulos | — | (818) 400 2419 | Windows, patio, painters | Thousand Oaks · Ventura County | — | — |
| Agoura Sash & Door INC | Don Everet Smith | — | (805) 449 2840 | GC, remodel, ADU | Westlake Village · Ventura County | — | — |
| Ague Ramirez Construction | Ramirez Agustin | — | (805) 890 4317 | GC, remodel, ADU | Fillmore · Ventura County | — | — |
| Aguila Construction INC | Elvia V Aguilar | — | (818) 355 2301 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Aguilar Construction | Aguilar Enrique | — | (805) 302 3286 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| Aguilar Pro Landscaping INC | Miguel Angel Aguilar-Ramirez | aguilarprolandscaping@gmail.com | (805) 850 5283 | Windows, patio, painters | Ventura · Ventura County | — | — |
| Aguilera Brothers Construction INC | Francisco Javier Aguilera | estimating@aguilerabrothers.com | (805) 901 4855 | GC, remodel, ADU | Santa Paula · Ventura County | — | — |
| Aim Glass & Mirror Service INC | Alejandro Flores Nieto | — | (805) 524 5336 | Windows, patio, painters | Ventura · Ventura County | — | — |
| Air Bending Heating And Air | Air Bending Heating And Air | — | (805) 990 9121 | HVAC | Simi Valley · Ventura County | — | — |
| Air By Kenny Kalbfleish | Air By Kenny Kalbfleish | — | (805) 231 1773 | HVAC | Simi Valley · Ventura County | — | — |
| Air Care Heating And Air | Air Care Heating And Air | — | (805) 701-1296 | HVAC | Ventura · Ventura County | — | — |
| Air Control Company | Frederick Joseph Iii Suddes | interested@domainmarket.com | (805) 646 2177 | HVAC | Ojai · Ventura County | — | — |
| Air Force Air Conditioning & Heating INC | Rocky Joseph Rocco | — | (805) 409 9010 | HVAC | Thousand Oaks · Ventura County | — | — |
| Air Innovations INC | Jovan Perez | — | (805) 407 4749 | HVAC | Ventura · Ventura County | — | — |
| Air Seal Insulation INC | Hector Jimenez | cassie@airsealinsulation.com | (805) 483 9020 | Other | Oxnard · Ventura County | — | — |
| Air Solutions Air Conditioning & Heating | Daniel Kent Whaley | — | (805) 908 1031 | HVAC | Thousand Oaks · Ventura County | — | — |
| Air Solutions And Beyond INC DBA Your Air Solutions | Amir Rahamim | — | (310) 877 7804 | HVAC | Westlake Village · Ventura County | — | — |
| Air System Solutions INC | Annie Catherine Kwasny | brian@airsystemsolutions.com | (805) 647 8551 | HVAC | Ventura · Ventura County | — | — |
| Air Temperature Solutions INC | Michael Robert Clark | — | (818) 647 1116 | HVAC | Simi Valley · Ventura County | — | — |