| Friendly Song Plumbing Construction | Song Conglin | — | (626) 297 9695 | Other | Rancho Cucamonga · San Bernardino County | — | — |
| Frigid Works | Victor Arthur Martinez | — | (424) 903 9555 | HVAC | Victorville · San Bernardino County | — | — |
| Frog Construction | Sandoval Ceasar | — | (818) 643 9037 | GC, remodel, ADU | Rancho Cucamonga · San Bernardino County | — | — |
| Frontier Builders | Frontier Builders | — | (909) 851 1674 | GC, remodel, ADU | Alta Loma · San Bernardino County | — | — |
| Frontline Enterprise | Frontline Enterprise | — | (909) 599 7233 | GC, remodel, ADU | Montclair · San Bernardino County | — | — |
| Frontline Refrigeration | Jason Ryan Dorado | — | (909) 279 5019 | HVAC | San Bernardino · San Bernardino County | — | — |
| Frost Electric | Kerry Floyd Frost | — | (909) 491 9814 | Electricians | Oak Hills · San Bernardino County | — | — |
| Frostline Construction | Deagan Tyler Risnes | — | (909) 708 6936 | GC, remodel, ADU | Rimforest · San Bernardino County | — | — |
| Frosty & Friends HVAC INC | Fabian Martinez | — | (909) 676 3111 | HVAC | Apple Valley · San Bernardino County | — | — |
| Frv Construction & Remodeling INC | Velazquez Fernando Ramirez | — | (562) 305 8627 | GC, remodel, ADU | Colton · San Bernardino County | — | — |
| Fryman Management INC | Ross Gaylord Fryman | info@frymanmgmt.com | (949) 481 5211 | Other | Chino · San Bernardino County | — | — |
| Ft Knox | Ft Knox | — | (760) 413 7976 | Other | Oak Hills · San Bernardino County | — | — |
| Fuel Equipment Services INC | Robert Isaiah Rodriguez | — | (800) 581 3710 | Electricians | Montclair · San Bernardino County | — | — |
| Fuel Pros INC | Kurt Levens | — | (909) 614 1379 | GC, remodel, ADU | Chino · San Bernardino County | — | — |
| Fuelex | Alexander Eddie Archak Guiragossian | — | (626) 551 9057 | GC, remodel, ADU | Upland · San Bernardino County | — | — |
| Fuentes Construction Co | Fuentes Luis | — | (626) 409 7619 | GC, remodel, ADU | Ontario · San Bernardino County | — | — |
| Fuentes Grading INC | Ortega Antonio Fuentes | — | (760) 780 3827 | Other | Victorville · San Bernardino County | — | — |
| Fuertez Tractor Service INC | Carlos Gabriel Fuertez | — | (909) 615 1334 | Other | Upland · San Bernardino County | — | — |
| Fui Ming Thien Construction | Thien Fui Ming | — | (909) 856 2222 | GC, remodel, ADU | Rancho Cucamonga · San Bernardino County | — | — |
| Fulcrum Builders INC | Christian Chalino Ramirez | info@fulcrum-builders.com | (442) 284 3813 | GC, remodel, ADU | Apple Valley · San Bernardino County | — | — |
| Full Armor Fire Protection INC | Pat John Wiseman | — | (951) 990 5413 | Other | Chino · San Bernardino County | — | — |
| Full Barrel Home Warranty Services LLC | Jason Scott Lashbrook | — | (909) 228 0777 | GC, remodel, ADU | Chino Hills · San Bernardino County | — | — |
| Full Spectrum Plumbing INC | Marc James Gallo | — | (909) 382 4121 | Other | Highland · San Bernardino County | — | — |
| Fullmer Construction | Robert Allen Fullmer | paige@fullmerco.com | (909) 947 9467 | GC, remodel, ADU | Ontario · San Bernardino County | — | — |
| Furniture Medic By Peter | Dak Peter | — | (626) 963 2174 | Other | Upland · San Bernardino County | — | — |
| Fusen Yangze | Fusen Yangze | — | (626) 247 0794 | GC, remodel, ADU | Rancho Cucamonga · San Bernardino County | — | — |
| Future Landscape Service | Morales Luis | 10xfrank@gmail.com | (909) 471 6387 | Windows, patio, painters | Fontana · San Bernardino County | — | — |
| Fv Landscaping | Fv Landscaping | — | (951) 830 2626 | Windows, patio, painters | San Bernardino · San Bernardino County | — | — |
| Fx Tile & Stone | Fx Tile & Stone | — | (760) 490 3177 | Other | Apple Valley · San Bernardino County | — | — |
| Fy Construction Co | Yang Zifan | — | (626) 872 7896 | GC, remodel, ADU | Chino · San Bernardino County | — | — |
| Fz Construction | Fabian Zuniga | %20info@fz-construction.com | (909) 273 7792 | GC, remodel, ADU | Twin Peaks · San Bernardino County | — | — |
| Fzg Carpentry | Felipe Zaizar Jr Guerrero | — | (909) 230 2255 | Other | Fontana · San Bernardino County | — | — |
| G & C Fabrication DBA G & C Ironworks | George Terry Jr Tolson | — | (760) 912 0688 | Other | Phelan · San Bernardino County | — | — |
| G & G Contractor | G & G Contractor | — | (562) 762 6694 | GC, remodel, ADU | Yucca Valley · San Bernardino County | — | — |
| G & G Plumbing | G & G Plumbing | — | (909) 319 3367 | Other | Ontario · San Bernardino County | — | — |
| G & G Rack Installation | Edwin Gregorio Guerrero | — | (909) 519 3360 | Other | Rancho Cucamonga · San Bernardino County | — | — |
| G & H Repair & Services Co | Daniel Boyd Henry | — | (909) 717 9693 | HVAC | Chino Hills · San Bernardino County | — | — |
| G & J Pro Painting LLC | Gilberto Rodriguez-Fajardo | — | (909) 401 1848 | Windows, patio, painters | Rialto · San Bernardino County | — | — |
| G & M Backhoe Service INC | Laura Jean Griffin | — | (909) 464 1417 | Other | Chino · San Bernardino County | — | — |
| G & R Constructors INC | Casey Eugene Ricks | — | (951) 440 6119 | GC, remodel, ADU | Yucaipa · San Bernardino County | — | — |