| Flux Technician | Flux Technician | — | (818) 792 6883 | Other | Vacaville · Solano County | — | — |
| Focal Point Builders INC | Joseph Michael Shaman | — | (866) 921 2408 | GC, remodel, ADU | Benicia · Solano County | — | — |
| Focus Rooter And Plumbing | Focus Rooter And Plumbing | — | (510) 491 3814 | Other | Vallejo · Solano County | — | — |
| Fonseca Pool Builders | Fonseca Pool Builders | — | (562) 926-7665 | Pool | Santa Fe Springs · Solano County | — | — |
| Foothill Builders | Foothill Builders | — | (707) 580 0498 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| Ford Painting | Ford Painting | — | (707) 580 0049 | Windows, patio, painters | Vacaville · Solano County | — | — |
| Fortify Fire Protection | Anthony Michael Sebastian | — | (707) 408 2952 | Electricians | Benicia · Solano County | — | — |
| Fortify Fire Systems | Anthony Michael Sebastian | — | (707) 654 6385 | Other | Benicia · Solano County | — | — |
| Four Edges INC | Christopher Arlington Heeney | — | (707) 447 2220 | Other roofers | Vacaville · Solano County | — | — |
| Four Seasons Roofing | Diaz Hernandez Efrain | — | (707) 484 4780 | Other roofers | Suisun City · Solano County | — | — |
| Frank Monroy Construction DBA Frank Monroy Concrete | Francisco Javier Monroy Cabrera | — | (628) 280 7541 | Other | Vallejo · Solano County | — | — |
| Frank's Construction | Frank Fuentes Carabajal | — | (707) 326 5811 | GC, remodel, ADU | Suisun City · Solano County | — | — |
| Frank's Septic Service INC | Creighton Richard Urquhart | — | (707) 678 4041 | Other | Vacaville · Solano County | — | — |
| Frankandsons Painting Company LLC | Ariel Fraire | micah@micahrich.com | (707) 310 5072 | Windows, patio, painters | Vallejo · Solano County | — | — |
| Free Electrical Services | Brian Harlowe Free | — | (707) 225 5822 | Electricians | Fairfield · Solano County | — | — |
| Freedlun Hydroseeding INC | Terri Annette Aispuro | — | (707) 446 8101 | Other | Vacaville · Solano County | — | — |
| Freedom Construction & Design INC | Scott Alan Vander Heyden | — | (925) 812 5156 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Freeman Roofing | Carl C Freeman | — | (707) 447 2294 | Other roofers | Vacaville · Solano County | — | — |
| Fresh Start Landscaping | Michael Minh-Ngoc Tran | — | (707) 294 5893 | Windows, patio, painters | Vallejo · Solano County | — | — |
| Friendly Plumbing And Sons | Friendly Plumbing And Sons | — | (510) 776 6149 | Other | Vallejo · Solano County | — | — |
| Frontline Electrical Services | Randall Lee Sherwood | — | (707) 747 6251 | Electricians | Benicia · Solano County | — | — |
| Frost Tile Company INC | Frost Floyd | — | (510) 725 2012 | Other | Vallejo · Solano County | — | — |
| Fuentes Electric | Isai Asael Ardiano Fuentes | — | (415) 756 2870 | Electricians | Fairfield · Solano County | — | — |
| Fuimaono Construction | Bobo Taumaloto Fuimaono | — | (415) 444 6348 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| Full Coverage Painting INC | Michael Daniel Nolan | — | (707) 384 5108 | Windows, patio, painters | Vacaville · Solano County | — | — |
| Full House Painting Co | Jose Lozano Ramirez | — | (415) 235 5807 | Windows, patio, painters | Vallejo · Solano County | — | — |
| Full Service Electric LLC | Steven Michael Taugner | — | (707) 554 4833 | Electricians | Vallejo · Solano County | — | — |
| Fuller Construction | Thomas Raney Fuller | — | (707) 372 9166 | Other | Vacaville · Solano County | — | — |
| Fusion Solana Beach Plumber | Fusion Solana Beach Plumber | — | (858) 519-0206 | Pool | Solana Beach · Solano County | — | — |
| G & F Construction | Conrad Joseph Bouchard | — | (707) 718 5505 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| G & G Construction | Larry Bryan Gilmore | — | (510) 410 9245 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| G & G Construction | Mark David Gardiner | — | (707) 974 3503 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| G & L Enterprises | Michael James Gedeon | interested@domainmarket.com | (707) 249 4331 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| G & T Brothers Roofing INC | Juan Carlos Gonzalez Trujillo | — | (707) 656 7065 | Other roofers | Vallejo · Solano County | — | — |
| G A Landscaping | G A Landscaping | — | (707) 758 8677 | Windows, patio, painters | Vallejo · Solano County | — | — |
| G B C Electrical & HVAC Services | George Bautista Consolacion | — | (510) 650 8775 | HVAC | Fairfield · Solano County | — | — |
| G B Landscape INC | Ernesto Leonardo| Caballero Ernesto Caballero Sanchez | — | (707) 863 7540 | Windows, patio, painters | Fairfield · Solano County | — | — |
| G C Drywall | G C Drywall | — | (707) 880 8583 | Other | Vacaville · Solano County | — | — |
| G D & Son Builders INC | Torres Gustavo Delgado | — | (707) 656 5580 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| G D I Construction | Gerardo Donato Iuliano | — | (707) 718 1040 | GC, remodel, ADU | Vacaville · Solano County | — | — |