| Filshie Enterprises | Filshie Glenn | glenn@filshieenterprises.com | (707) 331 2611 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Fine Cabinetry And Woodwork | Fine Cabinetry And Woodwork | finecww@gmail.com | (707) 548 7064 | GC, remodel, ADU | Rohnert Park · Sonoma County | — | — |
| Fine Line Striping INC | Richard David Reed | — | (707) 829 0100 | Other | Rohnert Park · Sonoma County | — | — |
| Fine Tree Care | Fine Tree Care | finetreecare@comcast.net | (707) 874 2018 | Tree | Sebastopol · Sonoma County | — | — |
| Finetti Plumbing & Backflow | Paul William Finetti | — | (707) 787 0737 | Other | Santa Rosa · Sonoma County | — | — |
| Finewright Builders | Corey Michael Bassett | — | (707) 337 9376 | GC, remodel, ADU | Windsor · Sonoma County | — | — |
| Finger Painting | Finger Painting | — | (707) 753 0013 | Windows, patio, painters | Windsor · Sonoma County | — | — |
| Finishing Touch Construction | Dennis Patrick Garvin | — | (707) 322 8211 | Other | Santa Rosa · Sonoma County | — | — |
| Finley Contracting | Kenneth Gene Jr Finley | — | (707) 431 0446 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Fip Builders INC | Hernandez Cesar | — | (707) 477 1245 | GC, remodel, ADU | Cotati · Sonoma County | — | — |
| Fire Guard Protection INC | Emad Mahmoud Eid | — | (707) 206 0534 | Other | Rohnert Park · Sonoma County | — | — |
| Fire Safe Technologies INC | Edgar Enrique Flores Hernandez | — | (707) 595 8933 | Other | Santa Rosa · Sonoma County | — | — |
| Fire Safety Supply INC | Dawn Michele Carlsen | — | (707) 575 9117 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Firebrand Safety Systems INC DBA Firebrand Electric | Christian Louis Cornilsen | — | (707) 303 7270 | Electricians | Santa Rosa · Sonoma County | — | — |
| Fireplace Transformations | Fireplace Transformations | — | (707) 829 5855 | GC, remodel, ADU | Sebastopol · Sonoma County | — | — |
| Firestine Tile & Stone | Firestine Tile & Stone | — | (408) 680 6553 | Other | Windsor · Sonoma County | — | — |
| First Choice Quality Painting INC | Felix Alonso Lopez | firstchoicepainting100@yahoo.com | (805) 273 1180 | Windows, patio, painters | Santa Rosa Valley · Sonoma County | — | — |
| First Class Painting | First Class Painting | — | (707) 332 0760 | Windows, patio, painters | Santa Rosa · Sonoma County | — | — |
| First Class Paving | Nicholas Andrew Stanley | — | (707) 799 2276 | Other | Rohnert Park · Sonoma County | — | — |
| First String Home Improvement | First String Home Improvement | — | (707) 303 6619 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Fisch Bros Drilling | Edward James Fisch | info@fischbrosdrilling.com | (707) 823 3891 | Other | Sebastopol · Sonoma County | — | — |
| Fischer Tile INC | Eric Lindsay Fischer | info@fischertile.com | (707) 829 3701 | Other | Sebastopol · Sonoma County | — | — |
| Fisher Construction | Scott Byron Fisher | — | (707) 529 4483 | GC, remodel, ADU | Sebastopol · Sonoma County | — | — |
| Fisher Construction Company | Robert E Fisher | — | (707) 322 2919 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Fitzgerald Decorating & Painting | Fitzgerald Decorating & Painting | — | (707) 479 4558 | Windows, patio, painters | Cloverdale · Sonoma County | — | — |
| Fitzgerald Masonry | Fitzgerald Masonry | info@fitzgeraldmasonry.com | (707) 393 1906 | Other | Windsor · Sonoma County | — | — |
| Fitzpatrick Electric INC | Bernard Joseph Fitzpatrick | — | (707) 529 0120 | Electricians | Vineburg · Sonoma County | — | — |
| Five A's Painting | Five A's Painting | — | (707) 867 5998 | Windows, patio, painters | Santa Rosa · Sonoma County | — | — |
| Five Star Asphalt & Construction | Wasso Jeremiah | — | (707) 479 3335 | Other | Santa Rosa · Sonoma County | — | — |
| Five Star Painting Of Sonoma County | Richard Henry Carroll | — | (707) 219 8537 | Windows, patio, painters | Santa Rosa · Sonoma County | — | — |
| Fixture - Pro INC | Kara Lee Key | — | (707) 545 3901 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Flahavan Construction INC | William Christopher Flahavan | — | (805) 208 5969 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Flash & Co | Jeffrey Charles Avery | — | (707) 972 7049 | Other | Santa Rosa · Sonoma County | — | — |
| Flawless Painting | Flawless Painting | — | (707) 327 9477 | Windows, patio, painters | Santa Rosa · Sonoma County | — | — |
| Fletcher Fabrication LLC | Roger Lee Ii Fletcher | info@fletcherfabrication.com | (707) 894 2889 | Other | Cloverdale · Sonoma County | — | — |
| Flick Enterprises | Ethan Bruce Flick | — | (707) 481 8013 | Other | Cloverdale · Sonoma County | — | — |
| Flint General Engineering | Flint General Engineering | — | (707) 696 4800 | Other | Santa Rosa · Sonoma County | — | — |
| Floor Covering Installers Anonymous | Floor Covering Installers Anonymous | — | (707) 479 4735 | Other | Sonoma · Sonoma County | — | — |
| Flooring Fx INC | Marcus Harrison Myres | — | (707) 537 0852 | Other | Santa Rosa · Sonoma County | — | — |
| Flooring Solutions By Justin | Flooring Solutions By Justin | — | (805) 794 8605 | Other | Rohnert Park · Sonoma County | — | — |