| G E Concepts | Miguel Angel Cruz | — | (626) 255 8615 | GC, remodel, ADU | Suisun · Solano County | — | — |
| G G G Construction | Luis Gabriel Gonzalez | — | (925) 451 6738 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| G G Heating & Air INC | Lara Flores Israel | — | (707) 731 2066 | HVAC | Vallejo · Solano County | — | — |
| G L E Quality Painting INC | Diane Denise Aguirre | — | (510) 685 9389 | Windows, patio, painters | Vallejo · Solano County | — | — |
| G M Remodeling | G M Remodeling | — | (707) 628 2230 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| G Miles | G Miles | — | (707) 484 4467 | Electricians | Suisun City · Solano County | — | — |
| G R P Roofing | Rivera Pina Gerardo | — | (707) 437 6938 | Other roofers | Fairfield · Solano County | — | — |
| G S Carrell Construction Company INC A California Corporation | Gus Stevens Carrell | — | (707) 975 4608 | GC, remodel, ADU | Benicia · Solano County | — | — |
| G&g Deck And Fence DBA G & G Landscape Design | Gary Wayne Harrington | — | (925) 421 5879 | Windows, patio, painters | Vallejo · Solano County | — | — |
| G&t All-terrain Construction | Trujillo Alejandro Gonzalez | — | (707) 333 1552 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| G's Custom Doors | G's Custom Doors | gscustomdoors@gmail.com | (650) 634 8570 | Other | Fairfield · Solano County | — | — |
| Galectric Energy | Galectric Energy | — | (707) 720 3946 | Electricians | Vacaville · Solano County | — | — |
| Gamut Construction | Jonathan Todd Stavro | — | (510) 282 2225 | GC, remodel, ADU | Benicia · Solano County | — | — |
| Garage Door Excellence | Garage Door Excellence | garagedoorexcellence@gmail.com | (866) 219 7099 | Other | Fairfield · Solano County | — | — |
| Garcia Construction | Arturo Fernandez Garcia | impallari@gmail.com | (707) 655 5528 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Garcia's Roofing | Luis Manuel Garcia | — | (707) 208 8827 | Other roofers | Dixon · Solano County | — | — |
| Garrett Lance King | Garrett Lance King | — | (530) 440 0375 | Other | Fairfield · Solano County | — | — |
| Gary Bernard Eck DBA Eck Construction | Gary Bernard Eck | — | (707) 332 4879 | GC, remodel, ADU | Dixon · Solano County | — | — |
| Gastelum Tree & Landscaping Services A Partnership | Gerardo Villasenor | — | (707) 718 0645 | Windows, patio, painters | Dixon · Solano County | — | — |
| Gateway Builder | Gateway Builder | — | (707) 580 7717 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| Gateway Construction INC | Joseph Leon Madison | — | (925) 744 5370 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| Gauthier's Building & Maintenance | David Edward Gauthier | — | (925) 250 4090 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| Gauthiers Construction | Shawn Joseph Gauthier | — | (707) 249 4483 | GC, remodel, ADU | Dixon · Solano County | — | — |
| Gd3 Plumbing Solutions | Grant Davis | anapbm@gmail.com | (415) 525 9576 | Other | Vallejo · Solano County | — | — |
| Ge Premium Construction | Gonzalez Frias Salvador | — | (707) 514 8484 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| Gene Heck | Gene Heck | — | (408) 687 5192 | Electricians | Vacaville · Solano County | — | — |
| General & Modern Floors | General & Modern Floors | generalmodernfloors@gmail.com | (707) 228 7721 | Other | Vallejo · Solano County | — | — |
| General Construction Consulting | Douglas John Boggs | astigma@astigmatic.com | (415) 997 9936 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| General Pool Construction | Taylor Ray Mehlhaff | — | (707) 624 0258 | Pool | Vacaville · Solano County | — | — |
| Genesis Electric | Dante Barrera Santos | electric@genesiselectric.com | (415) 999 0399 | Electricians | Vallejo · Solano County | — | — |
| Genesis Electrical Services | Nelson Omar Martinez | — | (510) 776 2974 | Electricians | Fairfield · Solano County | — | — |
| Genesis Home Construction | Candido Otoniel Ordonez Juarez | info@genesishomeconstruction.com | (415) 532 9542 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Geo-ex Subsurface Exploration DBA Geo - Ex Drilling | Thomas Andrew Scott | — | (916) 799 8198 | Other | Dixon · Solano County | — | — |
| George's Tile Service | Gheorghe Dan Restivan | georgestileservice@gmail.com | (707) 384 2276 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| Gerber Plumbing | Gerber Plumbing | — | (707) 319 3233 | Other | Vallejo · Solano County | — | — |
| German Z INC | German Zepeda | — | (707) 373 2546 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Gladiator Renovations | Gladiator Renovations | — | (707) 704 5435 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| Glenn's Home & Commercial INC | Glenn Thomas Pulliam | — | (707) 628 4246 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| Global Solutions | Global Solutions | — | (925) 580 7828 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| Globe Engineering Development | Mohammad Dawood Kavosh | — | (916) 856 2255 | Other | Fairfield · Solano County | — | — |