| #1 Pacific Coast Roofing | Francisco Javier Valencia | — | (805) 796 4427 | Other roofers | Oxnard · Ventura County | — | — |
| 101 AC & Heating INC | Eugene Andrew Ayala | — | (805) 746 8582 | HVAC | Oxnard · Ventura County | — | — |
| 101 Concrete Company | Anguiano Isidro Torres | — | (805) 814 5379 | Other | Oxnard · Ventura County | — | — |
| 101 Construction | Kelly Kathleen| Ridge Kelly Kathleen Ridge-plascencia | — | (818) 879 6160 | Electricians | Westlake Village · Ventura County | — | — |
| 101 Electric INC | Kelly Kathleen Ridge-Plascencia | — | (818) 879 6160 | Electricians | Westlake Village · Ventura County | — | — |
| 101 Electrical Solutions INC | Chad Lee Loera-Benefield | — | (805) 765 5065 | Electricians | Oxnard · Ventura County | — | — |
| 101 Glass & Mirror | 101 Glass & Mirror | — | (805) 247 1100 | Windows, patio, painters | Oxnard · Ventura County | — | — |
| 101 Plumbing Repair Service | Jason Michael Turnidge | — | (805) 258 6458 | Other | Ventura · Ventura County | — | — |
| 101 Roofing & Construction INC | Nicholas Matthew Ciari | — | (805) 302 9951 | Other roofers | Oxnard · Ventura County | — | — |
| 101 Sheet Metal INC | Arnold Gysbertus Jr Scherpenborg | accounting@sheet-metal.com | (805) 499 7444 | Other | Newbury Park · Ventura County | — | — |
| 18th St Finish Carpentry | 18th St Finish Carpentry | — | (310) 570 9080 | Other | Oxnard · Ventura County | — | — |
| 1st Class Access Control | Donald Duane Slayton | service@1stclassaccesscontrol.com | (805) 955 9230 | Other | Simi Valley · Ventura County | — | — |
| 1st Demo INC | Juan Manuel Vargas Figueroa | — | (805) 604 7526 | Other | Oxnard · Ventura County | — | — |
| 1st HVAC INC | Mostafa Mohammad Ashraf | — | (805) 222 6941 | HVAC | Moorpark · Ventura County | — | — |
| 1st Painting | 1st Painting | sales@1stpainting.com | (805) 707 2204 | Windows, patio, painters | Simi Valley · Ventura County | — | — |
| 2 Trees Backflow Two Trees Plumbing INC | Glenn Vaughn Irwin | — | (805) 284 6181 | Other | Oxnard · Ventura County | — | — |
| 24 Hour Garage Door Pro | 24 Hour Garage Door Pro | — | (805) 501 0603 | Other | Simi Valley · Ventura County | — | — |
| 24 Hr Sprinklers INC | Ryan Leslie Hall | — | (805) 208 6900 | Windows, patio, painters | Simi Valley · Ventura County | — | — |
| 24 Kt Green | 24 Kt Green | — | (805) 377 5364 | Windows, patio, painters | Moorpark · Ventura County | — | — |
| 3 - Bar Corporation | Christopher Todd Wray | — | (805) 390 9505 | Other | Camarillo · Ventura County | — | — |
| 3 D Plumbing INC | Gregory Durand Des Baillets | — | (805) 443 4184 | Other | Thousand Oaks · Ventura County | — | — |
| 360 Tile | 360 Tile | — | (805) 907 5578 | Other | Oxnard · Ventura County | — | — |
| 3D Glass Design LLC | Douglas Dean Dawson | — | (805) 861 0393 | Windows, patio, painters | Ventura · Ventura County | — | — |
| 3ds Marble & Tile INC | Edvin Antonio Chacon Alvarez | — | (323) 719 5727 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| 3M Plumbing INC | Mario Manolo Monterroso Ramirez | — | (818) 800 7524 | Other | Simi Valley · Ventura County | — | — |
| 4 J's Plumbing And Drain Cleaning | Jeremy Edward Duncan | — | (805) 302 9564 | Other | Oxnard · Ventura County | — | — |
| 4 L & L INC DBA The Outside Edge | Carolyn Joy Corwin | — | (805) 277 9638 | Windows, patio, painters | Newbury Park · Ventura County | — | — |
| 4 Seasons Remodeling & Design INC | Amit Jacob Harel | — | (818) 516 7725 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| 4-u Construction INC | William Dean Slack | — | (323) 422 0643 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| 5 Star Low Volt LLC | Mauricio Lemus Franco | — | (805) 407 4715 | Other | Santa Paula · Ventura County | — | — |
| 54 Concrete | 54 Concrete | — | (805) 951 9428 | Other | Oxnard · Ventura County | — | — |
| 6 Hands LLC | Konrad Wolfgang Thieme | — | (805) 491 5377 | Other | Moorpark · Ventura County | — | — |
| 7 Day Garage Doors And Gates INC | Brian Martin Zepeda | — | (805) 279 8203 | Other | Thousand Oaks · Ventura County | — | — |
| 72 Mechanical Heating And Air Conditioning | Alberto Perez | — | (805) 816 6165 | HVAC | Oxnard · Ventura County | — | — |
| 77 Plumbing INC | Chavez Raymundo Olivares | — | (805) 953 9123 | Other | Moorpark · Ventura County | — | — |
| 805 - Lath & Plastering | 805 - Lath & Plastering | — | (805) 705 6370 | Other | Ventura · Ventura County | — | — |
| 805 Advance Painting Co | Chavez Carlos | — | (805) 201 8587 | Windows, patio, painters | Oxnard · Ventura County | — | — |
| 805 Construction And Roofing LLC | Emily Ann Williams | — | (805) 395 0542 | Other roofers | Thousand Oaks · Ventura County | — | — |
| 805 Custom Builders INC | Roberto Camacho | — | (805) 796 3635 | GC, remodel, ADU | Moorpark · Ventura County | — | — |
| 805 Custom Cabinets LLC | Jacob Edward Elder | — | (805) 301 0019 | Other | Camarillo · Ventura County | — | — |