| Flanders Heat And Air Systems INC | Bret Richard Flanders | — | (925) 461 3333 | HVAC | Pleasanton · Alameda County | — | — |
| Fleischmann Design Collaborative INC | Morgan Griffith Fleischmann | — | (510) 900 1905 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Flex Pro Painting INC | Emmanuel Orozco | — | (510) 706 3271 | Windows, patio, painters | Hayward · Alameda County | — | — |
| Fley Electric LLC | Carlos Fernando Fley Cano | — | (707) 267 3473 | Electricians | Oakland · Alameda County | — | — |
| Flood Rescue 911 INC | Brandon Joseph Rober Martin | — | (888) 987 3728 | Other | Hayward · Alameda County | — | — |
| Floor Concepts | Floor Concepts | — | (510) 914 7777 | Other | San Lorenzo · Alameda County | — | — |
| Floor Dimensions INC | White Janka | janka@floordimensions.com | (510) 525 5656 | Other | Albany · Alameda County | — | — |
| Floor Sure Interiors | Floor Sure Interiors | — | (510) 381 0653 | Other | Oakland · Alameda County | — | — |
| Floorence | Kartal Selcuk | — | (650) 483 2593 | GC, remodel, ADU | Pleasanton · Alameda County | — | — |
| Flooring Discounters INC | Alexander Korsakov | — | (619) 316 1390 | Other | Oakland · Alameda County | — | — |
| Flooring Solutions INC | Mark Christopher Iberri | eric@flooring-solutions.com | (925) 294 5200 | Other | Livermore · Alameda County | — | — |
| Floors4less | Oscar Humberto Chicas | — | (650) 954 7103 | Other | Hayward · Alameda County | — | — |
| Florence Metal Products | Florence Metal Products | — | (510) 569 5453 | Other | San Leandro · Alameda County | — | — |
| Flores Drywall INC | Flores-ramirez Tomas | eben@eyebytes.com | (510) 842 8470 | Other | Oakland · Alameda County | — | — |
| Flores General Building | Flores General Building | — | (510) 907 0134 | GC, remodel, ADU | Alameda · Alameda County | — | — |
| Flores Plumbing | Flores Plumbing | — | (209) 499 1553 | Other | Hayward · Alameda County | — | — |
| Flory Construction INC | Beatrix Miller Flory | info@floryconstruction.com | (510) 483 6860 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| Flostor | Lee Ann Redmond Weeks | serviceteam@flostor.com | (510) 265 6700 | Other | Hayward · Alameda County | — | — |
| Flow Form Plumbing | Flow Form Plumbing | — | (415) 294 1588 | Other | Oakland · Alameda County | — | — |
| Flowstate Design Build | Michael Charles Hoffman | — | (510) 517 8611 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Flying Dutchman General Contractor | Flying Dutchman General Contractor | — | (510) 384 6592 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Fm Construction Co | Peter Soon Jun | — | (408) 309 8130 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Fm Superior Painting | Fm Superior Painting | — | (510) 378 4327 | Windows, patio, painters | Hayward · Alameda County | — | — |
| Focas Flooring INC | Kostas Symeon Focas | — | (925) 216 6275 | Other | Livermore · Alameda County | — | — |
| Focon INC | Ian Eugene Booker | — | (510) 465 6319 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Fog City Roofing & Construction LLC | Silva Adriano | — | (510) 689 7214 | Other roofers | Alameda · Alameda County | — | — |
| Folsom Dam Constructors Jv | Construction Company INC Shimmick | — | (925) 461 1500 | HVAC | Pleasanton · Alameda County | — | — |
| Fonte's Custom Countertops | Fonte's Custom Countertops | contact@fontescustomcountertops.com | (510) 773 2914 | Other | Union City · Alameda County | — | — |
| Fook Hong Sham | Fook Hong Sham | — | (650) 534 7946 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Forbes Plumbing | Forbes Plumbing | — | (510) 559 3575 | Other | Berkeley · Alameda County | — | — |
| Forderer Cornice Works INC | Mark Brooks Koeppen | — | (510) 783 4200 | Windows, patio, painters | Hayward · Alameda County | — | — |
| Foreign Finishes Creative Plaster Designs | Miguel Raymundo Barragan | — | (510) 677 0973 | GC, remodel, ADU | Alameda · Alameda County | — | — |
| Forerunner Construction | Gao Yu | andrew@forerunnergroup.co | (510) 516 8889 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Forever Green | Forever Green | — | (510) 472 4487 | Tree | Newark · Alameda County | — | — |
| Formosa Electric Corp | Hsiu Hsien Lin | — | (510) 709 5978 | Electricians | Newark · Alameda County | — | — |
| Forrest Bodily | Forrest Bodily | — | (510) 673 2693 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| Forrest Canutt | Forrest Canutt | — | (510) 424 3913 | Other | Alameda · Alameda County | — | — |
| Forrest Painting | Forrest Painting | — | (415) 438 0820 | Windows, patio, painters | Alameda · Alameda County | — | — |
| Fortaleza Construction INC | Diaz Jose Amaya | — | (510) 269 0347 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Forticon INC | Everardo Austreberto Llanos | info@forticon.com | (510) 328 3230 | Other | Oakland · Alameda County | — | — |