| Final Touch / Finish Carpentry | Final Touch / Finish Carpentry | — | (909) 217 9691 | Other | Chino · San Bernardino County | — | — |
| Final Touch Construction & Design | Luis Manuel Echeverria | — | (909) 350 3658 | Other roofers | Fontana · San Bernardino County | — | — |
| Finazzo Pool Maintenance | Finazzo Pool Maintenance | — | (909) 214 9354 | Pool | Rancho Cucamonga · San Bernardino County | — | — |
| Fine Building INC | John Matthew Black | — | (760) 401 4962 | GC, remodel, ADU | Yucca Valley · San Bernardino County | — | — |
| Fine Finish Woodworks | Fine Finish Woodworks | — | (760) 680 1479 | Other | Apple Valley · San Bernardino County | — | — |
| Finest Remodeling & Construction INC | Jose Eduardo Rivera | — | (323) 610 6101 | GC, remodel, ADU | Upland · San Bernardino County | — | — |
| Finishline Painting | Finishline Painting | — | (909) 851 1832 | Windows, patio, painters | Yucaipa · San Bernardino County | — | — |
| Finnco Services Incorporated | Matthew Finnerty | — | (909) 355 0707 | Other | Fontana · San Bernardino County | — | — |
| Fiore Marble & Tile INC | Fiore Davide | — | (909) 754 9278 | Other | Yucaipa · San Bernardino County | — | — |
| Fire Alliance INC | Anthony Albert Alessio | — | (909) 552 1161 | Electricians | Rancho Cucamonga · San Bernardino County | — | — |
| Fire Chief Fire Protection Enterprise INC | Tho Minh Cao | — | (909) 381 8049 | GC, remodel, ADU | San Bernardino · San Bernardino County | — | — |
| Fire Detection System & Electrical | Jose Luis Sarinana | — | (909) 269 3319 | Electricians | San Bernardino · San Bernardino County | — | — |
| Fire Expert | Fire Expert | fireexpert@fireexpert.com | (760) 963 7470 | Electricians | Helendale · San Bernardino County | — | — |
| Fire Protection Specialists | Fire Protection Specialists | — | (760) 673 5511 | Other | Redlands · San Bernardino County | — | — |
| Fire Risk Management Corp DBA Frm Tree Service | Oscar Dean Dykesten | — | (909) 744 4859 | Tree | Big Bear City · San Bernardino County | — | — |
| Fire Solution Masters Corp | Brian Christian Rios | micah@micahrich.com | (626) 260 3713 | Other | Ontario · San Bernardino County | — | — |
| Fire Storm Construction | John Francis Berlin | — | (909) 987 6579 | GC, remodel, ADU | Alta Loma · San Bernardino County | — | — |
| Fire Tech | Michael Salvador De La Torre | — | (909) 217 4624 | GC, remodel, ADU | Chino · San Bernardino County | — | — |
| Fire X Incorporated | Zachary Jordan Rivera | — | (760) 567 3777 | Other | Yucca Valley · San Bernardino County | — | — |
| Fire Zone Extinguisher Systems | Fire Zone Extinguisher Systems | — | (951) 416 9689 | Electricians | Chino Hills · San Bernardino County | — | — |
| Fireshield | Aaron James Grode | — | (408) 457 4282 | Other | Crestline · San Bernardino County | — | — |
| First Aid Painting | First Aid Painting | — | (562) 441 6533 | Windows, patio, painters | Victorville · San Bernardino County | — | — |
| First Call Plumbing And Restoration Of The Inland Empire | William Thomas Jr Gregory | ieoffice@firstcallplumber.com | (909) 751 2323 | GC, remodel, ADU | San Bernardino · San Bernardino County | — | — |
| First Certified Arbor Care | First Certified Arbor Care | — | (909) 880 1131 | Windows, patio, painters | San Bernardino · San Bernardino County | — | — |
| First Choice Painting & Drywall | First Choice Painting & Drywall | — | (909) 946 6428 | Windows, patio, painters | Alta Loma · San Bernardino County | — | — |
| First Choice Windows INC | Gutierrez Rigoberto | — | (909) 991 6204 | Windows, patio, painters | Ontario · San Bernardino County | — | — |
| First Class Heating & Air Conditioning INC | Matthew Alexander Gross | — | (909) 229 2478 | HVAC | Redlands · San Bernardino County | — | — |
| First Defense Fire Protection | First Defense Fire Protection | — | (909) 515 3200 | Other | Hesperia · San Bernardino County | — | — |
| First Gen Electric INC | Jonathan Alexander Mendoza-Perez | — | (909) 786 7332 | Electricians | Fontana · San Bernardino County | — | — |
| First Place Glass Incorporated | Samuel Leon | — | (909) 980 9300 | Windows, patio, painters | Rancho Cucamonga · San Bernardino County | — | — |
| First Quality Painting INC | Sam Jimenez | — | (909) 627 3774 | Windows, patio, painters | Chino · San Bernardino County | — | — |
| First R C Corp | Sean Apel | — | (310) 980 1635 | GC, remodel, ADU | Loma Linda · San Bernardino County | — | — |
| First Tri Electric | Triyoes Neytirat | — | (909) 222 9663 | Electricians | Rialto · San Bernardino County | — | — |
| First Vision Security Systems | Donovan Dongwoo Lee | — | (909) 922 4413 | Alarm and generators | Chino · San Bernardino County | — | — |
| Fischer INC | Michael Glenn Fischer | — | (909) 881 2910 | GC, remodel, ADU | San Bernardino · San Bernardino County | — | — |
| Fischer Plumbing | Fischer Plumbing | — | (909) 881 2910 | GC, remodel, ADU | San Bernardino · San Bernardino County | — | — |
| Fisher Plumbing | Fisher Plumbing | — | (760) 832 3616 | Other | Morongo Valley · San Bernardino County | — | — |
| Fittante & Son INC | Tony Anthony Cortese | — | (909) 243 4134 | GC, remodel, ADU | Upland · San Bernardino County | — | — |
| Fitzgerald Septic Works | Fitzgerald Septic Works | septicworks760@gmail.com | (760) 819 9673 | Other | Apple Valley · San Bernardino County | — | — |
| Five Star Custom Cleaning | Five Star Custom Cleaning | — | (760) 403 0166 | Other | Apple Valley · San Bernardino County | — | — |