| Frontier Electric INC | Allen Lawrence Leepin | — | (707) 794 1553 | Electricians | Cotati · Sonoma County | — | — |
| Frontline Fencing | Frontline Fencing | — | (707) 369 9755 | Other | Rohnert Park · Sonoma County | — | — |
| Fs Global Solutions | Troy Anthony Clemons | — | (707) 737 7663 | GC, remodel, ADU | Sebastopol · Sonoma County | — | — |
| Fudge It Plumbing | Fudge It Plumbing | — | (707) 360 2759 | Other | Santa Rosa · Sonoma County | — | — |
| Fuego Construction | Alamillo Elizabeth | danielle@fuegoconstruction.com | (707) 245 9583 | GC, remodel, ADU | Sebastopol · Sonoma County | — | — |
| Full Circle Painting & Drywall INC | Maurice John Staub | — | (707) 753 1293 | Windows, patio, painters | Petaluma · Sonoma County | — | — |
| Full Palette Painting | Full Palette Painting | — | (707) 849 3631 | Windows, patio, painters | Sebastopol · Sonoma County | — | — |
| Fullview Window Covering Installations | Fullview Window Covering Installations | — | (707) 481 3542 | Other | Santa Rosa · Sonoma County | — | — |
| Fury Electric | Michael Thomas Benninghofen | — | (707) 322 7562 | Electricians | Santa Rosa · Sonoma County | — | — |
| Fuse HVAC & Appliance Repair Sonoma | Fuse HVAC & Appliance Repair Sonoma | — | (707) 993-0979 | HVAC | Sonoma · Sonoma County | — | — |
| Futrell Sonoma Corporation | Hugh Tyler Futrell | — | (707) 568 3482 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| G & B Construction | William Leonard Gunter | — | (707) 526 1094 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| G & G Tree Service | Valles Gabriel Rivas | — | (707) 483 3945 | Other | Santa Rosa · Sonoma County | — | — |
| G & H Welding | Torres Alfredo Gonzalez | — | (707) 228 5168 | Other | Santa Rosa · Sonoma County | — | — |
| G & M Landscape | G & M Landscape | — | (707) 775 0253 | Windows, patio, painters | Rohnert Park · Sonoma County | — | — |
| G A C Company | Gary Allen Cox | — | (707) 538 8000 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| G B Rafael | Francisco Jimenez | — | (707) 566 8146 | Other | Santa Rosa · Sonoma County | — | — |
| G B S Graphics | G B S Graphics | — | (707) 608 8310 | Other | Sebastopol · Sonoma County | — | — |
| G Building And Design INC | Richard Stuart Wallstrum | — | (707) 799 4893 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| G C C I INC | Shari Lynne Gentry | — | (707) 545 2134 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| G Case Electric | Gabriel Donald Case | — | (707) 293 8169 | Electricians | Occidental · Sonoma County | — | — |
| G Clifford Grutze | G Clifford Grutze | — | (707) 570 9647 | Electricians | Healdsburg · Sonoma County | — | — |
| G David Codding | G David Codding | — | (707) 526 7180 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| G E Shafer | G E Shafer | — | (707) 888 2701 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| G Force Electric | Daniel Jr Garcia | — | (707) 492 2129 | Electricians | Santa Rosa · Sonoma County | — | — |
| G Garcia Electric | Gary Edward Garcia | — | (707) 933 1542 | Electricians | Sonoma · Sonoma County | — | — |
| G Hernandez Enterprises INC DBA California Seamless Gutters | Hernandez Gerardo | — | (707) 569 0607 | Other | Santa Rosa · Sonoma County | — | — |
| G K Construction | Gregory Scott Kirchoff | — | (707) 291 8641 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| G L C Construction INC | George Luis Cortes | — | (707) 579 8673 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| G L Montoya Painting | G L Montoya Painting | — | (707) 695 6613 | Windows, patio, painters | Rohnert Park · Sonoma County | — | — |
| G M Labrucherie | G M Labrucherie | — | (707) 975 3640 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| G O C Plumbing INC | Jason Peter Behl | — | (707) 974 1556 | Other | Sebastopol · Sonoma County | — | — |
| G O Mechanical INC | Kevin Roland Oertel | — | (707) 933 6231 | GC, remodel, ADU | Windsor · Sonoma County | — | — |
| G Plastering INC | Genaro Pacheco Azpeitia | — | (707) 795 0053 | Other | Rohnert Park · Sonoma County | — | — |
| G Rezentes Drywall | G Rezentes Drywall | — | (707) 753 1823 | Other | Petaluma · Sonoma County | — | — |
| G S Painting | G S Painting | — | (415) 725 8357 | Windows, patio, painters | Petaluma · Sonoma County | — | — |
| G-man Construction | Mejia-piedras Guillermo | — | (415) 656 6106 | GC, remodel, ADU | Cotati · Sonoma County | — | — |
| G.e.g. Landscape | G.e.g. Landscape | — | (707) 548 2650 | Windows, patio, painters | Sonoma · Sonoma County | — | — |
| Gabbert Acoustical INC | David Brian Gabbert | — | (707) 773 1613 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| Gabriel Koorosh Campbell-faramarzi | Gabriel Koorosh Campbell-faramarzi | — | (415) 717 6065 | GC, remodel, ADU | Sonoma · Sonoma County | — | — |