| Gray Plumbing INC | Jeffrey Anthony Gray | — | (707) 646 1356 | Other | Fairfield · Solano County | — | — |
| Gray Tile Company INC | Rosalba Hernandez | helpdesk@graytile.com | (707) 774 1542 | Other | Suisun City · Solano County | — | — |
| Graydon Kouri Plumbing Heating Air Conditioning | Kouri Graydon | — | (707) 434 9461 | HVAC | Fairfield · Solano County | — | — |
| Grayer Construction And Maintenance | Quentin Dewayne Ii Grayer | — | (707) 474 8644 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| Great Green Landscaping | Great Green Landscaping | — | (707) 428 4723 | Windows, patio, painters | Suisun City · Solano County | — | — |
| Great Scott Electric INC | Devon Oliver Scott | — | (707) 246 2421 | Electricians | Vallejo · Solano County | — | — |
| Green Build Education Group | Paul Randall Fair | — | (707) 494 9587 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| Green Country Roofing | Aguilar Enrique | — | (707) 432 9992 | Other roofers | Vacaville · Solano County | — | — |
| Green Field Tree Services INC | Hugo Alberto Pineda | — | (661) 549 2693 | Tree | Fairfield · Solano County | — | — |
| Green Joe's Landscaping | Green Joe's Landscaping | — | (415) 846 1601 | Windows, patio, painters | Fairfield · Solano County | — | — |
| Green Legacy Construction | Bryan Porfirio Rivas Treminio | — | (650) 613 8035 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Green Mountain Insulation Construction | Carlos Lenard Deloach | — | (907) 302 8507 | Other | Fairfield · Solano County | — | — |
| Green Thumb Tree Care | Green Thumb Tree Care | — | (707) 365 5483 | Tree | Vacaville · Solano County | — | — |
| Green Valley Painting INC | James Edward Lillibridge | — | (707) 864 6864 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| Green Volt Energy | Green Volt Energy | — | (714) 496 7717 | Electricians | Vacaville · Solano County | — | — |
| Green Wood Construction Builders INC | Salvador Servin Guiza | — | (510) 815 6331 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Greenlife Construction Company | Gilbert Edward Jr Martin | — | (503) 957 8316 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Greg Morgan Construction INC | Greg Alan Morgan | — | (707) 975 9378 | GC, remodel, ADU | Benicia · Solano County | — | — |
| Gregory Neil Turner | Gregory Neil Turner | — | (707) 656 6526 | GC, remodel, ADU | Benicia · Solano County | — | — |
| Greiner Heating Air And Electric INC | David Julius Krueger | — | (707) 678 1784 | HVAC | Dixon · Solano County | — | — |
| Griffin Construction | Martin Michael Griffin | — | (707) 446 8091 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| Griffin Construction | Michael Kenichi Griffin | — | (707) 330 3637 | GC, remodel, ADU | Rio Vista · Solano County | — | — |
| Gro Construction | Uriel Pizano Guerrero | — | (707) 310 5033 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Groundworks California LLC | Clifford Robert Frazao | — | (707) 296 9815 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| Groundworx General Engineering | Groundworx General Engineering | — | (818) 470 6724 | Other | Vallejo · Solano County | — | — |
| Gryder Painting | Gryder Painting | — | (707) 747 0212 | Windows, patio, painters | Vacaville · Solano County | — | — |
| Gryphon Audio Video Installation | Gryphon Audio Video Installation | — | (925) 788 7235 | Other | Vacaville · Solano County | — | — |
| Gsb / Obayashi Jv | Corporation Obayashi | — | (925) 372 8000 | GC, remodel, ADU | Benicia · Solano County | — | — |
| Gsk Electric INC | Gurjit Singh Khaira | gskelectric10@gmail.com | (707) 660 9800 | Electricians | Vallejo · Solano County | — | — |
| Guada Construction Co | Antonio Guadarama | — | (707) 639 6952 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| Guardian Tree Experts | Guardian Tree Experts | — | (707) 319 3326 | Tree | Vallejo · Solano County | — | — |
| Guerreros Yards Landscaping | Mina Jo Guerrero | — | (707) 344 5537 | Windows, patio, painters | Suisun · Solano County | — | — |
| Guido's Service | Guido Christopher Estrada | — | (707) 647 2840 | HVAC | Vallejo · Solano County | — | — |
| Guillen Construction & Remodeling | William Boanerges Guillen Ruano | — | (510) 672 9303 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Guillermo's Landscaping Co | Mandujano Guillermo | — | (707) 290 3718 | Windows, patio, painters | Rio Vista · Solano County | — | — |
| Gutierrez General Engineering INC | Hector Manuel Jr Gutierrez Tostado | — | (510) 932 6792 | Other | Vallejo · Solano County | — | — |
| Guzman Painting | Guzman Painting | — | (707) 529 2359 | Windows, patio, painters | Fairfield · Solano County | — | — |
| H & M Home Remodeling INC | H Jonas Keys | — | (916) 437 8346 | HVAC | Dixon · Solano County | — | — |
| H & W Hard Working Construction | David Michael Harczak | — | (925) 487 5171 | Windows, patio, painters | Benicia · Solano County | — | — |
| H J C Construction Co | Joel H Carrillo | — | (510) 269 0913 | GC, remodel, ADU | Fairfield · Solano County | — | — |