| Filly's Legacy Landscape | Filly's Legacy Landscape | — | (951) 746 4825 | Windows, patio, painters | Nuevo · Riverside County | — | — |
| Final Cut | Final Cut | — | (951) 375 0936 | Other | Temecula · Riverside County | — | — |
| Final Phase Clean Up | Final Phase Clean Up | — | (951) 813 6937 | Other | Wildomar · Riverside County | — | — |
| Final Phase Construction | Kevin Joseph Thompson | — | (858) 776 0165 | GC, remodel, ADU | Winchester · Riverside County | — | — |
| Final Plumbing Co | Yaser Mahmoud Ahma Hazama | — | (951) 212 4985 | Other | Riverside · Riverside County | — | — |
| Finalized Construction INC | Philip James Guyette | — | (760) 802 6838 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Finan Construction | Brian Scott Finan | — | (760) 485 8990 | GC, remodel, ADU | La Quinta · Riverside County | — | — |
| Finchum Construction INC | Chris Jesus Sr Finchum | — | (760) 553 3569 | GC, remodel, ADU | Beaumont · Riverside County | — | — |
| Fine Finish Custom Cabinets & Trim | Daniel William Hippert | — | (714) 580 7163 | Other | Perris · Riverside County | — | — |
| Fine Line Concrete Cutting INC | Melvin M Jr Martin | — | (909) 208 3620 | Other | Riverside · Riverside County | — | — |
| Fine Ornamental Iron Works | Fine Ornamental Iron Works | — | (619) 451 5335 | Other | Winchester · Riverside County | — | — |
| Fine Touch INC | Valberto Azevedo Silva | — | (951) 688 6448 | Windows, patio, painters | Riverside · Riverside County | — | — |
| Fineline Builders And Contracting | Jeffrey Thomas Knebl | — | (760) 219 4733 | GC, remodel, ADU | Jurupa Valley · Riverside County | — | — |
| Fineline Custom Woodworks INC | Michael James Reynolds | — | (760) 770 0880 | Other | Cathedral City · Riverside County | — | — |
| Fineline Electric INC | Eidan Omar Escalante | — | (714) 744 2600 | Electricians | Jurupa Valley · Riverside County | — | — |
| Fineline Furniture Finishes And Painting | Fineline Furniture Finishes And Painting | — | (760) 324 6024 | Windows, patio, painters | Cathedral City · Riverside County | — | — |
| Fineline Interiors INC | Brad Aaron Smith | — | (951) 352 4500 | Other | Riverside · Riverside County | — | — |
| Finer Flooring | Finer Flooring | — | (951) 347 8419 | Other | Riverside · Riverside County | — | — |
| Finest Flooring Installation | Finest Flooring Installation | — | (619) 395 3328 | Other | Temecula · Riverside County | — | — |
| Finish Jobs Construction | Markus Sean Ryan | mark@finishjobs.com | (714) 244 0262 | GC, remodel, ADU | Wildomar · Riverside County | — | — |
| Finish Line | Finish Line | — | (951) 972 9962 | GC, remodel, ADU | Anza · Riverside County | — | — |
| Finishing Touch Painting | Finishing Touch Painting | — | (760) 969 0634 | Windows, patio, painters | Bermuda Dunes · Riverside County | — | — |
| Fiore Electrical INC | Anthony James Fiore | — | (951) 270 1933 | Electricians | Norco · Riverside County | — | — |
| Fiori Carpet Installation | Fiori Carpet Installation | — | (949) 933 2886 | Other | Murrieta · Riverside County | — | — |
| Fire Busters INC | Shabli Ayal | — | (818) 421 8621 | Other | Cathedral City · Riverside County | — | — |
| Fire Place Door Guy | Fire Place Door Guy | — | (951) 837 0097 | Other | Temecula · Riverside County | — | — |
| Fire Sprinkler Systems INC | Harold Jerome Rodgers | — | (800) 915 3473 | Electricians | Corona · Riverside County | — | — |
| Fire Wire Systems INC | Arturo Meza Molina | info@firewiresystems.com | (951) 564 8615 | Electricians | Winchester · Riverside County | — | — |
| Fire-n-ice | Jason Michael Rievley | info@firenice.com | (951) 258 7557 | HVAC | Corona · Riverside County | — | — |
| Fireline INC | Sylvia Gortz | — | (760) 328 4601 | Other | Cathedral City · Riverside County | — | — |
| Firemasters Corp DBA Prefab Fireplace Installations | Ceja Victor Hernandez | — | (760) 777 5995 | Other | Beaumont · Riverside County | — | — |
| Firematic LLC | David Borjas | — | (769) 567 2274 | Other | Desert Hot Springs · Riverside County | — | — |
| Fireplace Design And Build | Fireplace Design And Build | — | (951) 837 0097 | Other | Temecula · Riverside County | — | — |
| Firewater Restoration And Construction | Daniel Lacatus | — | (909) 261 9095 | GC, remodel, ADU | Cathedral City · Riverside County | — | — |
| Firm Foundation Asphalt | Firm Foundation Asphalt | — | (951) 544 9461 | Other | Perris · Riverside County | — | — |
| Firm Landscape INC | Herrera Naul Rivera | — | (760) 895 9930 | Windows, patio, painters | Thousand Palms · Riverside County | — | — |
| Firm Tech Concrete | Eduardo Daniel Miranda Vargas | firmtechconcrete@gmail.com | (909) 485 2095 | Windows, patio, painters | Homeland · Riverside County | — | — |
| Firme Speed Const Service | Alfred Jerry Gonzalez | — | (951) 294 4615 | GC, remodel, ADU | Murrieta · Riverside County | — | — |
| First Choice A / C & Heating INC | Atila Both | — | (760) 989 2369 | HVAC | Palm Desert · Riverside County | — | — |
| First Choice Builders Co | Andres Reynoso Curiel | — | (951) 422 5470 | GC, remodel, ADU | Homeland · Riverside County | — | — |