| F & G Developments LLC | Quezada Daniel Fuentes | — | (707) 805 4636 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| F & M Steel Fabricators INC | Delfino Bustamante | — | (707) 552 1393 | Other | Vallejo · Solano County | — | — |
| F D Y Electrical Services | Floyd Danny Young | — | (707) 862 2166 | Electricians | Suisun City · Solano County | — | — |
| F G S Construction INC | Roberto Carlos Rivera Gonzalez | — | (707) 816 1448 | GC, remodel, ADU | Suisun · Solano County | — | — |
| F J Cortes Remodeling | F J Cortes Remodeling | — | (707) 704 5733 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| F M Contractor's | F M Contractor's | info@fmcontractors.com | (707) 422 2125 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| F O S INC | Christopher Steven Valdez | — | (818) 237 7008 | Other | Fairfield · Solano County | — | — |
| F R Roofing | Feliciano Bernardo Ramirez Fuentes | — | (707) 803 0846 | Other roofers | Fairfield · Solano County | — | — |
| Faenzi Plumbing | Faenzi Plumbing | — | (415) 730 1485 | Other | Vacaville · Solano County | — | — |
| Fairfield Electric INC | Robert Greg Wink | — | (707) 689 6143 | Electricians | Fairfield · Solano County | — | — |
| Fairfield Heating And Air Conditioning | Fairfield Heating And Air Conditioning | — | (707) 422 9200 | HVAC | Fairfield · Solano County | — | — |
| Fairfield Safe & Lock Company | Lam Sammy | — | (707) 426 3000 | Other | Fairfield · Solano County | — | — |
| Fairvac Plumbing INC | Johnny Jason Mayfield | — | (707) 689 4094 | Other | Vacaville · Solano County | — | — |
| Famor Construction | Allan Rubia Famor | — | (707) 315 5167 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Far Eastern Builders | Far Eastern Builders | — | (707) 805 7700 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Far Superior Painting | Far Superior Painting | — | (707) 208 0466 | Windows, patio, painters | Vacaville · Solano County | — | — |
| Fausto Concrete INC | Jorge Primitivo Fausto | — | (707) 319 7866 | Other | Vallejo · Solano County | — | — |
| Fawver's Flooring | Fawver's Flooring | — | (707) 235 0979 | Other | Vallejo · Solano County | — | — |
| Fco Concrete Construction Company INC | Francisco Sanchez | — | (707) 642 0361 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Fences By Fernando | Fences By Fernando | — | (707) 319 9173 | Other | Vallejo · Solano County | — | — |
| Ferdig Fencing | Ferdig Fencing | — | (707) 451 2559 | Other | Dixon · Solano County | — | — |
| Ferreira Painting Company | Horace Manuel Ferreira | — | (707) 477 0807 | Windows, patio, painters | Dixon · Solano County | — | — |
| Ferreira's Landscape Maintenance | Ferreira's Landscape Maintenance | — | (707) 447 9248 | Windows, patio, painters | Vacaville · Solano County | — | — |
| Fierce Painting Company | Jose Salvador Barbosa | — | (707) 914 5425 | Windows, patio, painters | Fairfield · Solano County | — | — |
| Final Touch Wood Flooring | Final Touch Wood Flooring | — | (650) 200 7222 | Other | Vallejo · Solano County | — | — |
| Finish Line Construction | Brooke S Schouten | service@finishlineconstruction.com | (707) 447 7777 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| Fire & Ice HVAC INC | David Edward Garcia | — | (707) 880 8025 | HVAC | Vacaville · Solano County | — | — |
| First Choice Heating & Air Conditioning | Steven Raymond Hill | — | (707) 853 7360 | HVAC | Benicia · Solano County | — | — |
| First Response Fire Protection | First Response Fire Protection | — | (707) 386 0006 | Other | Fairfield · Solano County | — | — |
| Fitzperfect Windows - Doors And More INC | Bradley Wayne Fitzgerald | — | (707) 452 8844 | Windows, patio, painters | Vacaville · Solano County | — | — |
| Five Star Electric LLC | Welberto Antonio Alvarado | — | (510) 461 7787 | Electricians | Vallejo · Solano County | — | — |
| Fix's Welding & Fabrication | Fix's Welding & Fabrication | — | (916) 214 5377 | Other | Vacaville · Solano County | — | — |
| Flat Rate Electric | Anthony David Quintana | — | (707) 365 8038 | Electricians | Vacaville · Solano County | — | — |
| Flc Painting Co | Fernando Luis Carnero | — | (707) 215 5005 | Windows, patio, painters | Fairfield · Solano County | — | — |
| Flooring | Jose Anastasio De Leon Rodriguez | — | (707) 704 0978 | Other | Vallejo · Solano County | — | — |
| Flooring Liquidators | Tracy Robert Kalish | — | (209) 577 1035 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| Flooring Liquidators INC | Benjamin Charles Rowe | — | (209) 577 1035 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| Floors On First | Robert Winfield Totherow | eben@eyebytes.com | (707) 747 5999 | Other | Benicia · Solano County | — | — |
| Floors To Go | Floors To Go | — | (707) 427 2811 | Other | Suisun · Solano County | — | — |
| Flores Mechanical Services | Sergio Edward Flores | — | (707) 631 4549 | HVAC | Fairfield · Solano County | — | — |