| Fj Knight Construction INC | Fares Jumah Halaweh | — | (707) 321 2061 | GC, remodel, ADU | Napa · Napa County | — | — |
| Floor Coverings International- 554396 | Elizabeth Tegan Edwards | — | (707) 943 5667 | Other | Napa · Napa County | — | — |
| Flynn Construction | Christian Micah Flynn | jbeers@flynnconstruction.com | (707) 501 7682 | GC, remodel, ADU | Napa · Napa County | — | — |
| Four Star Electric | Terry Keith Litle | — | (707) 224 9561 | Electricians | Napa · Napa County | — | — |
| Fowler General Construction INC | Donald Everett Fowler | — | (707) 235 7937 | Other | Calistoga · Napa County | — | — |
| Fowler Landscaping | Fowler Landscaping | — | (707) 812 3735 | Windows, patio, painters | Napa · Napa County | — | — |
| Fox-heating Air Conditioning And Refrigeration | Jeff Edwin Jury | — | (323) 456 6833 | HVAC | Napa · Napa County | — | — |
| Fragoza Excavations | Fragoza Excavations | — | (707) 307 9379 | Other | Napa · Napa County | — | — |
| Francisco's Landscape INC | Francisco Eduardo Martinez Verduzco | — | (707) 363 4145 | Windows, patio, painters | Napa · Napa County | — | — |
| Frank Joseph Borges Jr | Frank Joseph Borges Jr | — | (707) 963 2960 | GC, remodel, ADU | Angwin · Napa County | — | — |
| Frank's Landscaping | Frank's Landscaping | — | (707) 738 0214 | Windows, patio, painters | Napa · Napa County | — | — |
| Fred Vogel | Fred Vogel | — | (707) 888 5740 | Electricians | Calistoga · Napa County | — | — |
| Freskan Construction | Justin Pierre Freskan | — | (707) 373 5833 | GC, remodel, ADU | American Canyon · Napa County | — | — |
| Friedrich Company | Friedrich Margaret | — | (707) 486 7070 | GC, remodel, ADU | St Helena · Napa County | — | — |
| Frost Electric INC | Daniel James Frost | — | (707) 251 1489 | Electricians | Napa · Napa County | — | — |
| Frye Built Construction INC | Briant Stephen Frye | — | (707) 742 9719 | GC, remodel, ADU | Napa · Napa County | — | — |
| Ftc Inspection Services | Ftc Inspection Services | — | (623) 853-7740 | Inspectors | Napa · Napa County | — | — |
| Furlani Plastering INC | Rodney John Furlani | — | (707) 849 8953 | Other | Napa · Napa County | — | — |
| Fuse HVAC & Appliance Repair Napa | Fuse HVAC & Appliance Repair Napa | — | (707) 883-8003 | HVAC | Napa · Napa County | — | — |
| Fvc Turf & Landscape INC | Fernando Jaime Villagran Costello | — | (707) 974 4939 | Windows, patio, painters | American Canyon · Napa County | — | — |
| G 3 M INC | Murray Douglas Walker | — | (707) 396 9050 | GC, remodel, ADU | Napa · Napa County | — | — |
| G Built INC | Daniel James George | — | (707) 291 0431 | GC, remodel, ADU | Napa · Napa County | — | — |
| G D Long Electric Company DBA Long Electric Company | Gregory Dale Long | — | (707) 252 3512 | Electricians | Napa · Napa County | — | — |
| G P Construction | Gregory Donald Pettegrew | — | (707) 732 3933 | GC, remodel, ADU | Napa · Napa County | — | — |
| G P Crane & Hoist Services | Dale Lee Pinckney | — | (707) 257 7909 | Other | Napa · Napa County | — | — |
| G R Piombo Construction Company | Guy Raymond Piombo | — | (707) 927 6813 | GC, remodel, ADU | Napa · Napa County | — | — |
| Gagetta Construction Company INC | Michael Dennis Gagetta | asst@gagettaconstruction.com | (707) 255 4555 | GC, remodel, ADU | Napa · Napa County | — | — |
| Gar Rector & Associates INC | Garric Paul Rector | — | (707) 963 8700 | GC, remodel, ADU | St Helena · Napa County | — | — |
| Garton Construction INC | Beverley Jean Garton | — | (707) 258 2111 | GC, remodel, ADU | Napa · Napa County | — | — |
| Gary Galusha Construction | Gary Dean Galusha | — | (707) 495 3447 | GC, remodel, ADU | St Helena · Napa County | — | — |
| Gary Glenn Enterprises | Gary Robert Glenn | — | (707) 287 7835 | GC, remodel, ADU | Napa · Napa County | — | — |
| Gary M Taylor | Gary M Taylor | — | (707) 333 1500 | GC, remodel, ADU | Napa · Napa County | — | — |
| Gastelum Custom Masonry | Robert Valles Gastelum | — | (707) 963 8272 | Other | St Helena · Napa County | — | — |
| Gau Landscaping INC | Aguirre Parra Gaudencio | — | (707) 332 7698 | Windows, patio, painters | Napa · Napa County | — | — |
| General Inspection Services | General Inspection Services | — | (707) 294-2736 | Inspectors | Napa · Napa County | — | — |
| Generation Three Painting | Generation Three Painting | — | (530) 720 0396 | Windows, patio, painters | Calistoga · Napa County | — | — |
| George David Forster | George David Forster | — | (707) 224 5222 | Windows, patio, painters | Napa · Napa County | — | — |
| Gerosa Construction | Phillip Joseph Gerosa | gerosaconstruction@gmail.com | (707) 363 5923 | GC, remodel, ADU | Napa · Napa County | — | — |
| Gibson's Wood Products | Gibson's Wood Products | — | (707) 255 6211 | Other | Napa · Napa County | — | — |
| Giovannoni Door Company | Michael Joseph Giovannoni | — | (707) 738 3224 | Other | Napa · Napa County | — | — |