| Fine Line Sawing And Drilling INC | Devin Corcoran | — | (510) 793 6700 | Other | Newark · Alameda County | — | — |
| Fine Structure | Fine Structure | — | (510) 851 1707 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Fine Wine Refrigeration LLC | Javier Tello Hinojosa | — | (650) 656 5698 | HVAC | Union City · Alameda County | — | — |
| Finest Heating & Air INC | Luis Atilano Posadas Trevino | — | (650) 223 2028 | HVAC | Pleasanton · Alameda County | — | — |
| Finest Precision Setters INC | Claro| Andrade Ortiz Claro Andrade-ortiz | — | (510) 904 2399 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Finest-builders | Todd Michael Harris | office@finest-builders.com | (925) 515 2592 | GC, remodel, ADU | Pleasanton · Alameda County | — | — |
| Finger Enterprises | Mark John Finger | — | (510) 710 3324 | GC, remodel, ADU | Alameda · Alameda County | — | — |
| Finish Line Flooring Concepts | Gary Lee Cook | — | (510) 579 7098 | Other | Newark · Alameda County | — | — |
| Finishing Coatings Painting | Finishing Coatings Painting | — | (650) 796 2533 | Windows, patio, painters | Hayward · Alameda County | — | — |
| Finlandia Tile | Finlandia Tile | — | (510) 409 2359 | Other | San Lorenzo · Alameda County | — | — |
| Finlay & Company | Daniel Spence Finlay | — | (510) 410 3256 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Fire & Security & Alarm Co | Ben Ghorbani Terani | — | (510) 428 9194 | Electricians | Emeryville · Alameda County | — | — |
| Fire & Water Damage Recovery | Frank Arthur Yankey | — | (510) 394 0980 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| Fire Line Protection INC | Oscar Jeovany Escobar | — | (510) 305 1939 | Other | Hayward · Alameda County | — | — |
| Fire Sentry Protection Services INC | Anil Kumar | — | (510) 535 9000 | Other | Dublin · Alameda County | — | — |
| Fire Stop Sprinkler Company | Curt Ray Carlson | andrew.m@firestopsprinkler.com | (510) 744 1500 | Other | Newark · Alameda County | — | — |
| Fire-matic Systems INC | Julie Ann Wolf | — | (510) 657 3473 | Other | Fremont · Alameda County | — | — |
| First Choice Landscape Construction | Khang Quang Le | — | (925) 757 2979 | Windows, patio, painters | Castro Valley · Alameda County | — | — |
| First Class Construction | Khan Zabiar | — | (510) 258 3920 | GC, remodel, ADU | Union City · Alameda County | — | — |
| First Edison | Bob Chaudhuri | bob@firstedison.com | (888) 309 8766 | Electricians | Pleasanton · Alameda County | — | — |
| First Generation Flooring INC | Camey Rosendo Quintana | — | (925) 570 8822 | Other | Hayward · Alameda County | — | — |
| First Restaurant Builder INC | Tony Chang | — | (510) 847 5283 | GC, remodel, ADU | Piedmont · Alameda County | — | — |
| Fitch Electric INC | Lucas Sandor Fitch | business@fitchelectric.com | (925) 684 8932 | Electricians | Pleasanton · Alameda County | — | — |
| Fito Plumbers INC | Lopez-barajas Arnulfo | fitoplumbers@gmail.com | (510) 586 0212 | Other | Livermore · Alameda County | — | — |
| Fitzbuild LLC | Michael Thomas Fitzgerald | hello@fitzbuild.com | (510) 604 9971 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Fitzgerald Construction INC | Fernando Rodriguez Maciel | builtforthis@fitzcon.info | (510) 531 4077 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Five Or Free Electrical Solutions INC | James Donovan Conner | — | (510) 394 2770 | HVAC | Livermore · Alameda County | — | — |
| Five Star Fencing | Five Star Fencing | — | (925) 784 2023 | Other | Livermore · Alameda County | — | — |
| Five Star Floors Leveling Services | Eric Scott Ross | — | (925) 548 2199 | Other | Dublin · Alameda County | — | — |
| Five Star Painting | Five Star Painting | — | (510) 781 4931 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Five Star Rooter And Plumbing INC | Jesus Alberto Martinez | — | (510) 571 6513 | Other | Hayward · Alameda County | — | — |
| Five Stars General Building Maintenance | Ivan Osiris Perez Delgado | — | (415) 271 7405 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Five Twenty Two Industries | Philip Scott Tiffin | — | (510) 452 3446 | Other | Oakland · Alameda County | — | — |
| Five7 Construction INC | Salas Francisco Coyote | — | (925) 595 4232 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Five9 Design DBA Five9 Builders | David Nathan Rucker | — | (510) 421 2605 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Fix & Restore INC | Fix & Restore INC | — | (747) 277-7677 | Restoration | Burbank · Alameda County | — | — |
| Fix It Fast Construction And Home Improvement Services | Hermineo Barragan Castro | — | (510) 331 3760 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| Fixit Construction INC | Craig Stephen Turner | interested@domainmarket.com | (510) 638 1421 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Flamingo's Flooring | Flamingo's Flooring | — | (510) 895 5400 | Other | San Leandro · Alameda County | — | — |
| Flamingo's Flooring INC | Jorge Diaz Corral | — | (510) 895 5400 | Other | San Leandro · Alameda County | — | — |