| Armstrong Construction | Daniel Brian Armstrong | — | (805) 659 0556 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Armstrong Interiors Construction | Christopher Lee Armstrong | — | (805) 523 7740 | GC, remodel, ADU | Moorpark · Ventura County | — | — |
| Arnold's Electric Service | Michael Douglas Arnold | astigma@astigmatic.com | (805) 276 5042 | Electricians | Oak View · Ventura County | — | — |
| Around Town Electric | Stephen F Mendonca | — | (805) 988 0636 | Electricians | Oxnard · Ventura County | — | — |
| Arriaga Construction | Jorge Adan Arriaga | — | (805) 760 3388 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| Arron Suit Plumbing INC | Aaron Randall Suit | — | (310) 612 5299 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Arrow Pool And Spa Repair | Arrow Pool And Spa Repair | — | (805) 985 5998 | Pool | Port Hueneme · Ventura County | — | — |
| Art Nouveau Iron Works LLC | Vincent Carey Arellano | — | (805) 201 5649 | Other | Oxnard · Ventura County | — | — |
| Artcraft Wood Design INC | Robert Urban Bouchard | — | (805) 644 9494 | Other | Ventura · Ventura County | — | — |
| Artech Development | Artech Development | — | (805) 279 4056 | GC, remodel, ADU | Oak View · Ventura County | — | — |
| Arthur Adish Jain/ Pi Chang Name Of Owner From Adish Jain | Arthur Adish Jain | — | (805) 217 4478 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| Arthur Otero | Arthur Otero | — | (213) 819 0355 | GC, remodel, ADU | Westlake Village · Ventura County | — | — |
| Artisan Edge Painting Co | Christian Alexander Morris | — | (412) 335 5563 | Windows, patio, painters | Ventura · Ventura County | — | — |
| Artistic Creations INC | Rafael Jose Ariztia | — | (805) 383 9002 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| Artistic Designs | Roman James Painter | scostello@artistic-designs.com | (818) 991 9131 | GC, remodel, ADU | Westlake Village · Ventura County | — | — |
| Artistic Landscape | Artistic Landscape | bill.artisticlandscape@gmail.com | (805) 300 0995 | Windows, patio, painters | Somis · Ventura County | — | — |
| Artistic Sign Group INC | John Steven Iadipaolo | sales@artisticsigngroup.com | (805) 232 4302 | Other | Camarillo · Ventura County | — | — |
| Artistic Tile | Artistic Tile | — | (805) 207 2256 | Other | Oxnard · Ventura County | — | — |
| Artistico Tile | Artistico Tile | — | (805) 302 1235 | Other | Camarillo · Ventura County | — | — |
| Artistico Wood Flooring INC | Octavio Eduardo Mejia Partida | — | (805) 794 3640 | Other | Fillmore · Ventura County | — | — |
| Artizen Floor Corp | Michael Windsor Bennett | — | (805) 650 1900 | Other | Camarillo · Ventura County | — | — |
| Artmex Artistic Iron INC | Arellano Aurelio | — | (805) 330 6502 | Other | Oxnard · Ventura County | — | — |
| Artner Construction Company | Stephanie Marie Brown | — | (818) 802 0314 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Artner West Construction INC | Mark Charles Artner | — | (805) 484 7457 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| Arturo Torres | Arturo Torres | — | (805) 499 2529 | Other | Oxnard · Ventura County | — | — |
| As Construction | Soroudi Aria | — | (818) 251 0315 | Other | Moorpark · Ventura County | — | — |
| As&t INC | Richard Martin Perini | — | (805) 581 0771 | Electricians | Simi Valley · Ventura County | — | — |
| Asap Tile Stone & Painting Services | Hrayr Harry Baltayan | — | (805) 549 4838 | Windows, patio, painters | Westlake Village · Ventura County | — | — |
| Ascendant Roofing And Solar LLC | Noah Toham Haas | — | (310) 980 8670 | Other roofers | Thousand Oaks · Ventura County | — | — |
| Ash Inc. | Albert Somers Howell | — | (307) 689 9070 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Ashwood Pro Painting INC | Felipe De Jesus Gonzalez Alvarez | — | (805) 258 9153 | Windows, patio, painters | Ventura · Ventura County | — | — |
| Asis Painting INC | Abad Jr Gomez | — | (805) 890 5942 | Windows, patio, painters | Oxnard · Ventura County | — | — |
| Aspen Contracting | Bruce Henry Harding | — | (805) 654 0692 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Asphalt Paving Specialists | Asphalt Paving Specialists | — | (805) 443 0292 | Other | Ventura · Ventura County | — | — |
| Asphalt Professionals INC | Jeffrey Cornel Ludlow | sales@asphaltprofessionals.com | (805) 375 2753 | Other | Thousand Oaks · Ventura County | — | — |
| Asset Development Group Paint And Coating INC | Villegas Jonatan Alfonso | — | (805) 444 2641 | Windows, patio, painters | Oxnard · Ventura County | — | — |
| Association Maintenance Services | James Thomas Trout | — | (805) 857 0234 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| Assurance Painting INC | Chavez Noe | — | (805) 832 3271 | Windows, patio, painters | Oxnard · Ventura County | — | — |
| Astudillo Carpentry INC | Astudillo Teliz Armando | — | (805) 201 8743 | Other | Oxnard · Ventura County | — | — |
| At Your Service Gc | Peter Sean Silvas | — | (805) 794 1238 | Electricians | Ventura · Ventura County | — | — |