| Fidencio Conejo Tile | Fidencio Conejo Tile | — | (805) 814 5276 | Other | Oxnard · Ventura County | — | — |
| Field Brothers Construction | Alonzo Banuelos | — | (805) 857 4168 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| Field Plumbing | Field Plumbing | — | (805) 857 5648 | Other | Newbury Park · Ventura County | — | — |
| Fierce Fire Protection INC | Kris Raymond Brandini | — | (805) 583 5000 | Other | Simi Valley · Ventura County | — | — |
| Figueroa Grading INC | Manuel Vincent Figueroa | — | (805) 495 1489 | Other | Moorpark · Ventura County | — | — |
| Fiicus Design Build LLC | Michael James Wilson | michael@fiicusdesignbuild.com | (805) 338 4361 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Fillmore Air Conditioning And Heating INC | Michael Gerard Van De Mheen | — | (805) 524 5706 | HVAC | Fillmore · Ventura County | — | — |
| Fillmore Granite And Tile | Fillmore Granite And Tile | — | (805) 981 9596 | Other | Oxnard · Ventura County | — | — |
| Fillmore Welding | Fillmore Welding | — | (805) 524 5873 | Other | Fillmore · Ventura County | — | — |
| Fine Built Interiors INC | Kevin Curtis Turner | — | (818) 785 3201 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Fine Finish Builders INC | Agustin Casillas | — | (818) 257 1743 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Fine Line Concrete Systems | Fine Line Concrete Systems | — | (805) 208 5363 | Other | Simi Valley · Ventura County | — | — |
| Fine Tip Painting | Fine Tip Painting | — | (805) 231 0200 | Windows, patio, painters | Thousand Oaks · Ventura County | — | — |
| Fine Wood Products | Fine Wood Products | — | (805) 798 2526 | Other | Santa Paula · Ventura County | — | — |
| Finest Fence INC | Mark Norman Kaesberg | — | (805) 581 5826 | Other | Simi Valley · Ventura County | — | — |
| Finish Line Paving INC | Scott Patrick Dolphin | finishlinepaving@gmail.com | (805) 351 0150 | Other | Fillmore · Ventura County | — | — |
| Finish Line Plumbing INC | James Louis Ii Ventura | — | (805) 696 3216 | Other | Ventura · Ventura County | — | — |
| Finishline Enterprises | Brett Allen Fratus | — | (818) 597 9511 | Windows, patio, painters | Simi Valley · Ventura County | — | — |
| Fire & Ice Heating & Air Cond | Tim Blake Tarry | — | (805) 584 3298 | HVAC | Simi Valley · Ventura County | — | — |
| Fire Alarm Sfp | Aydin Derakhshideh | — | (310) 920 3391 | Electricians | Thousand Oaks · Ventura County | — | — |
| Fire And Electric INC | George Jehad Baqleh | — | (510) 355 6144 | Electricians | Westlake Village · Ventura County | — | — |
| Fire Break Protection Systems INC | Kris Raymond Brandini | — | (805) 584 6800 | Other | Simi Valley · Ventura County | — | — |
| Fire Prevention Group | David Wesley Isackson | — | (310) 722 1556 | Other | Ventura · Ventura County | — | — |
| Fire Safety Fire Protection INC | Shimon Harel | — | (805) 368 6426 | Other | Thousand Oaks · Ventura County | — | — |
| Fire Sprinkler Fire Protection INC | Keyvani Hamid | — | (858) 999 7446 | Other | Westlake Village · Ventura County | — | — |
| Firebreak Response Service INC | Kris Raymond Brandini | — | (805) 584 6800 | Other | Simi Valley · Ventura County | — | — |
| Firetech Automatic Sprinkler | Alvin W Pharris | — | (805) 320 1231 | Other | Ventura · Ventura County | — | — |
| First Class Tree Service | Pamela Alejandra Plascencia Silva | — | (805) 612 2969 | Tree | Oxnard · Ventura County | — | — |
| First Light Electrical | Preston Eugene Lewis | — | (805) 889 2049 | Electricians | Oxnard · Ventura County | — | — |
| First Onsite Property Restoration | First Onsite Property Restoration | — | (805) 988-1040 | Restoration | Oxnard · Ventura County | — | — |
| First Quality In Construction INC | Moises Eleazar Aguilera | — | (805) 814 6740 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| Fischer Woodcrafts LLC | Werner Ernst Curt Fischer | — | (818) 389 6276 | Other | Moorpark · Ventura County | — | — |
| Fisher Plumbing | Paul John Fisher | — | (805) 660 1548 | Other | Simi Valley · Ventura County | — | — |
| Fix It Fast Plumbing And Rooter INC | Sam Angelo Iii Porrazzo | — | (888) 440 5325 | HVAC | Moorpark · Ventura County | — | — |
| Fix It Plumbing & Rooter INC | Enriquez Cuevas Daniel | — | (805) 293 0993 | Other | Ventura · Ventura County | — | — |
| Flahavan Construction | William Christopher Flahavan | — | (805) 708 5969 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Flash Electric INC | Brennan Scott Lambert | — | (805) 498 0630 | Electricians | Thousand Oaks · Ventura County | — | — |
| Flexible HVAC Repair Ventura | Flexible HVAC Repair Ventura | — | (805) 834-8152 | HVAC | Ventura · Ventura County | — | — |
| Flintco Property Maintenance | Flintco Property Maintenance | — | (805) 901 5338 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Floor Coverings International #554712 | Joseph William Corsello | — | (805) 870 8440 | Other | Camarillo · Ventura County | — | — |