| Giammona Construction INC | Albert Joseph Giammona | — | (707) 477 2125 | GC, remodel, ADU | Healdsburg · Sonoma County | — | — |
| Gianola Canvas Products | Lia Elaine Bonaccorso | — | (415) 332 3339 | Other | Petaluma · Sonoma County | — | — |
| Gifford Anderson Plumbing Incorporated | Gifford Michael Anderson | — | (707) 527 6007 | Other | Santa Rosa · Sonoma County | — | — |
| Giles Construction | Jay Paul Giles | — | (707) 481 9232 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Giles Tile | Giles Tile | — | (707) 544 4919 | Other | Forestville · Sonoma County | — | — |
| Gill Landscape INC | Gregory Lloyd Gill | — | (707) 829 1070 | Windows, patio, painters | Sebastopol · Sonoma County | — | — |
| Gillis Construction | Gregory Tanner Gillis | — | (707) 206 1998 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| Ginori Painting | Ginori Painting | infoginoripainting@gmail.com | (415) 596 2644 | Windows, patio, painters | Petaluma · Sonoma County | — | — |
| Giovacchini Construction INC | Vincent Dominic Giovacchini | — | (707) 658 1282 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| Giovanni Construction And Electric | Giovanni Daniel Villavicencio | — | (707) 799 7797 | Electricians | Cloverdale · Sonoma County | — | — |
| Glagola Construction | John Patrick Glagola | — | (415) 269 9900 | GC, remodel, ADU | Geyserville · Sonoma County | — | — |
| Glazier & Glazier Builders INC | Jarrod M Mertens | — | (707) 478 1914 | GC, remodel, ADU | Penngrove · Sonoma County | — | — |
| Gleason Construction | Seth Putnam Gleason | — | (707) 331 3887 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Gleeson Construction | Joel Franklin Gleeson | — | (415) 897 1490 | GC, remodel, ADU | Cotati · Sonoma County | — | — |
| Glen George Rupiper Construction | Glen George Rupiper | — | (707) 849 2096 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| Glenn Alan Hughes Builder | Glenn Alan Hughes Builder | — | (415) 497 9396 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Glenn Fricker Construction INC | Glenn Dill Fricker | glenn@glennfrickerconstruction.com | (707) 321 5335 | GC, remodel, ADU | Sebastopol · Sonoma County | — | — |
| Glenn Pope Woodworking INC | Glenn Allen Pope | — | (707) 942 5393 | Other | Santa Rosa · Sonoma County | — | — |
| Glenn Salkeld Painting | Glenn Salkeld Painting | — | (707) 829 5783 | Windows, patio, painters | Graton · Sonoma County | — | — |
| Global Impact Construction INC | Carrillo-cortez Luis | — | (707) 337 3160 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Gm Tiling & Mosaics | Gm Tiling & Mosaics | — | (707) 360 8434 | Other | Santa Rosa · Sonoma County | — | — |
| Gmc Flooring | Gmc Flooring | — | (707) 480 2172 | Other | Santa Rosa · Sonoma County | — | — |
| Gmh Builders INC | Seth Raeble Maze | — | (707) 757 5050 | GC, remodel, ADU | Sonoma · Sonoma County | — | — |
| Gmz Workz | Gmz Workz | — | (707) 790 3399 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| Go Plumb | Go Plumb | — | (707) 823 1402 | Other | Forestville · Sonoma County | — | — |
| Godinez Property Services | John Iii Godinez | — | (805) 921 0519 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Goebel Construction INC | Gregory Dee Jr Goebel | — | (707) 763 0088 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| Goebel Paving Grading & Underground | Goebel Paving Grading & Underground | — | (707) 338 1705 | Other | Petaluma · Sonoma County | — | — |
| Goflow Plumbing INC | Christopher Michael Torres | — | (707) 200 8350 | Other | Sonoma · Sonoma County | — | — |
| Gold Coast Signs | Gold Coast Signs | — | (707) 291 0370 | Other | Santa Rosa · Sonoma County | — | — |
| Gold Construction | Howard Charles Gold | — | (707) 763 2377 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| Gold Hammer Construction INC | David Ralph Hunt | info@goldhammerconstruction.com | (707) 588 0584 | GC, remodel, ADU | Sebastopol · Sonoma County | — | — |
| Golden Bay Landscaping LLC | Paniagua Romero Jaime | — | (707) 304 9730 | Windows, patio, painters | Santa Rosa · Sonoma County | — | — |
| Golden Gate Landscape Management INC | Frank John Patane | — | (707) 546 6660 | Windows, patio, painters | Santa Rosa · Sonoma County | — | — |
| Golden Grove Landscape | Golden Grove Landscape | — | (707) 787 7535 | Windows, patio, painters | Rohnert Park · Sonoma County | — | — |
| Golden Hammer Builder | Golden Hammer Builder | goldenhammerbuilder@yahoo.com | (650) 208 8395 | GC, remodel, ADU | Forestville · Sonoma County | — | — |
| Golden Oak Flooring INC | Mark Allen Van Antwerp | — | (707) 774 2978 | Other | Rohnert Park · Sonoma County | — | — |
| Golden State Electric INC | James Kenneth Carvelho | — | (707) 575 4111 | Electricians | Santa Rosa · Sonoma County | — | — |
| Golden State Lumber INC | Seth Wellington Nobmann | — | (707) 206 4199 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| Golden State Plumbing Nor Cal | Hank Wesley Nason | — | (707) 573 3961 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |