| Estrada Construction | Estrada Ricardo | — | (707) 884 1454 | GC, remodel, ADU | Gualala · Mendocino County | — | — |
| Evans Plumbing | Evans Plumbing | — | (707) 964 1724 | Other | Fort Bragg · Mendocino County | — | — |
| Everson Construction | Matthew Roger Everson | — | (707) 489 2949 | GC, remodel, ADU | Redwood Valley · Mendocino County | — | — |
| Expert Alarm | Expert Alarm | — | (760) 285-5070 | Alarm and generators | Palm Desert · Mendocino County | — | — |
| Extraordinary Electric | Ellen Joy Kibbe | — | (707) 347 6949 | Electricians | Point Arena · Mendocino County | — | — |
| Eyermann Enterprises | Michael Lee Eyermann | — | (707) 272 9797 | Tree | Willits · Mendocino County | — | — |
| Fairbairn Grading | Fairbairn Grading | — | (707) 743 2318 | Other | Potter Valley · Mendocino County | — | — |
| Faith Electric | Randal Grant Pageau | — | (707) 812 9208 | Electricians | Ukiah · Mendocino County | — | — |
| Family Tree Service INC | Reyes Raymundo Perez | marcdillon21@yahoo.com | (937) 329-8098 | Other | Laytonville · Mendocino County | — | — |
| Family Tree Service INC - Residential Commercial Municipal | Family Tree Service INC - Residential Commercial Municipal | — | (707) 512-0383 | Tree | Willits · Mendocino County | — | — |
| Ferranti Construction INC | Donald Roy Ferranti | — | (707) 485 0095 | GC, remodel, ADU | Redwood Valley · Mendocino County | — | — |
| Fienburgh Design And Construction INC | Richard Joseph Fienburgh | — | (707) 937 4036 | GC, remodel, ADU | Littleriver · Mendocino County | — | — |
| Figueroa Painting | Figueroa Painting | — | (707) 813 6589 | Windows, patio, painters | Fort Bragg · Mendocino County | — | — |
| Fords Painting | Fords Painting | — | (707) 841 6913 | Windows, patio, painters | Willits · Mendocino County | — | — |
| Forster Construction | Richard David Forster | — | (808) 557 0680 | GC, remodel, ADU | Redwood Valley · Mendocino County | — | — |
| Fort Bragg Electric INC | Rita Ann Mertle | angela@fortbraggelectric.com | (707) 964 9118 | Electricians | Fort Bragg · Mendocino County | — | — |
| Fort Bragg Plumbing | William Schroeder Mertle | — | (707) 964 0604 | Electricians | Fort Bragg · Mendocino County | — | — |
| Francis J Aszklar | Francis J Aszklar | — | (707) 684 1032 | GC, remodel, ADU | Gualala · Mendocino County | — | — |
| Franco Construction | Carlos Federico Franco | — | (707) 964 6239 | GC, remodel, ADU | Fort Bragg · Mendocino County | — | — |
| Frank's Fixin Construction | Otis Frank Hollibaugh | — | (707) 489 6413 | GC, remodel, ADU | Fort Bragg · Mendocino County | — | — |
| Frank's Plumbing Service | Frank Peter Leene | — | (707) 888 1966 | Other | Point Arena · Mendocino County | — | — |
| Franky Concrete INC | Jose Francisco Ballesteros Rodriguez | — | (707) 376 5511 | Other | Ukiah · Mendocino County | — | — |
| Franz Electric | Mark Allen Franz | gerenciapfe@franzelectric.com | (707) 462 8938 | Electricians | Ukiah · Mendocino County | — | — |
| Fredwood Roofers | Fredwood Roofers | — | (707) 367 0608 | Other roofers | Fort Bragg · Mendocino County | — | — |
| Freebairn - Smith Construction | Thomas Sutton Freebairn-smith | — | (707) 367 5644 | GC, remodel, ADU | Gualala · Mendocino County | — | — |
| Friendly Borders | Friendly Borders | — | (707) 813 1797 | Other | Comptche · Mendocino County | — | — |
| Fuller Electric | Dean Claydon Fuller | — | (707) 459 6454 | Electricians | Willits · Mendocino County | — | — |
| Future Electric Energy Company | Wallace Frederick Stahle | — | (707) 459 0474 | Electricians | Willits · Mendocino County | — | — |
| G Mann Painting | G Mann Painting | — | (707) 357 4223 | Windows, patio, painters | Fort Bragg · Mendocino County | — | — |
| Gaona Painting | Gaona Painting | — | (707) 357 5022 | Windows, patio, painters | Fort Bragg · Mendocino County | — | — |
| Garrison Construction & Concrete | Regina Caren Garrison | — | (707) 467 9023 | GC, remodel, ADU | Ukiah · Mendocino County | — | — |
| Gary A Swanson | Gary Arvid Swanson | — | (707) 964 3519 | Other | Fort Bragg · Mendocino County | — | — |
| Gary Fair Construction | Gary Randolph Fair | — | (925) 260 5299 | GC, remodel, ADU | Ukiah · Mendocino County | — | — |
| Gary L Smith General Contractor | Gary L Smith General Contractor | — | (707) 744 1663 | GC, remodel, ADU | Hopland · Mendocino County | — | — |
| Gb Plumbing | Gb Plumbing | — | (707) 684 9580 | Other | Gualala · Mendocino County | — | — |
| Gene Wixson Enterprises | Eugene Wixson | — | (707) 354 0282 | Other | Willits · Mendocino County | — | — |
| Gene Wixson Enterprises INC | Eugene Wixson | — | (707) 841 6999 | Other | Willits · Mendocino County | — | — |
| George Mavrakis | George Mavrakis | — | (707) 321 0953 | Other | Redwood Valley · Mendocino County | — | — |
| George T Ronk | George T Ronk | — | (916) 412 3082 | Other | Gualala · Mendocino County | — | — |
| George W Lawrence | George W Lawrence | — | (707) 813 7498 | GC, remodel, ADU | Mendocino · Mendocino County | — | — |