| George Salet Plumbing INC | George Victor Jr Salet | — | (415) 334 0733 | Other | Brisbane · San Mateo County | — | — |
| George's Garden Service Landscape | Jorge Luis Hernandez | — | (650) 996 0017 | Windows, patio, painters | Belmont · San Mateo County | — | — |
| Georgio Atana | Georgio Atana | — | (415) 756 0233 | Other roofers | Pacifica · San Mateo County | — | — |
| Gerard Watterson Painting | Gerard Watterson Painting | — | (650) 892 8125 | Windows, patio, painters | Pacifica · San Mateo County | — | — |
| Gerber Plumbing | Gerber Plumbing | — | (415) 377 3621 | Other | Daly City · San Mateo County | — | — |
| Germain Construction | Von Jordan Germain | alaliberte@germainconstruction.com | (831) 706 7440 | GC, remodel, ADU | Millbrae · San Mateo County | — | — |
| German Dominguez | German Dominguez | — | (415) 595 1483 | Windows, patio, painters | Daly City · San Mateo County | — | — |
| Gerry Martin | Gerry Martin | — | (650) 892 6083 | GC, remodel, ADU | Daly City · San Mateo County | — | — |
| Gertz Brothers Electric INC | Bryan Viotti Gertz | — | (650) 218 9224 | Electricians | Redwood City · San Mateo County | — | — |
| Ghg Builders LLC | Gregory Howe Gallo | greg@ghgbuilders.com | (650) 269 5142 | GC, remodel, ADU | Menlo Park · San Mateo County | — | — |
| Ghp Plumbing Solutions INC | Zeyad Abed Abunasser | — | (650) 732 9908 | Other | Millbrae · San Mateo County | — | — |
| Ghs Restoration INC | Fai Philip Wong | — | (209) 484 2216 | GC, remodel, ADU | Burlingame · San Mateo County | — | — |
| Giannini Construction LLC | Christopher Paul Giannini | — | (208) 880 0081 | Other | San Gregorio · San Mateo County | — | — |
| Gil Construction & Associates Incorporated | Ronny Eugene Gil | — | (650) 992 7800 | GC, remodel, ADU | Millbrae · San Mateo County | — | — |
| Gilbert O'sullivan Construction | Gilbert John O'sullivan | — | (650) 630 0411 | GC, remodel, ADU | San Mateo · San Mateo County | — | — |
| Gilman Screens & Kitchens DBA Gilmans Kitchens And Baths | Larry Bruce Lowenthal | — | (650) 340 2890 | GC, remodel, ADU | San Mateo · San Mateo County | — | — |
| Gilmans Kitchens And Baths - San Mateo | Gilmans Kitchens And Baths - San Mateo | — | (650) 679-7374 | Windows, patio, painters | San Mateo · San Mateo County | — | — |
| Gilmore Doors & Hardware | Gilmore Doors & Hardware | — | (650) 788 9126 | Other | Menlo Park · San Mateo County | — | — |
| Gilson Development INC | Patrick Ryan Gilson | — | (650) 440 2204 | GC, remodel, ADU | Woodside · San Mateo County | — | — |
| Gino Rinaldi INC | Gino Caesar Sr Rinaldi | — | (650) 540 9427 | Other | South San Francisco · San Mateo County | — | — |
| Gio Stone | Gio Stone | — | (408) 592 4809 | Other | Redwood City · San Mateo County | — | — |
| Gio's Floors LLC | Brandon Stanley Rivera | giosfloors@gmail.com | (650) 274 3316 | Other | San Mateo · San Mateo County | — | — |
| Giusto Construction | Michael Anthony Giusto | giustoright@gmail.com | (650) 520 9928 | GC, remodel, ADU | San Mateo · San Mateo County | — | — |
| Glam Roofing - San Mateo County | Glam Roofing - San Mateo County | — | (650) 240-6562 | Other roofers | San Mateo · San Mateo County | — | — |
| Glass Express | Glass Express | admin@wcoilhosting.com | (650) 347 2424 | Windows, patio, painters | San Mateo · San Mateo County | — | — |
| Glass Plus Film | Glass Plus Film | info@glassplusfilm.com | (650) 568 4320 | Other | Redwood City · San Mateo County | — | — |
| Glen Plastering Incorporated | Richard Patrick Grogan | — | (415) 971 4773 | Other | Millbrae · San Mateo County | — | — |
| Glenside Construction | Philip Patrick Mc Carthy | — | (415) 810 0486 | GC, remodel, ADU | San Mateo · San Mateo County | — | — |
| Glo Painting INC | Adbullah Omar Alzghoul | info@glopainting.com | (415) 424 2598 | Windows, patio, painters | South San Francisco · San Mateo County | — | — |
| Global Sun Landscape | Global Sun Landscape | — | (650) 868 5613 | Windows, patio, painters | South San Francisco · San Mateo County | — | — |
| Glscapes INC | Genaro Deleon Lopez | info.glscapes@gmail.com | (415) 419 1937 | GC, remodel, ADU | Daly City · San Mateo County | — | — |
| Glynn Construction | Michael Martin Glynn | glynnconstruction80@gmail.com | (415) 846 7350 | GC, remodel, ADU | Brisbane · San Mateo County | — | — |
| Gm Lucky Construction INC | Xiang Rong Lin | — | (650) 238 4163 | GC, remodel, ADU | South San Francisco · San Mateo County | — | — |
| Gmd Builder INC | Ariel Reynaldo De La Quintana | — | (650) 556 3367 | Other | Redwood City · San Mateo County | — | — |
| Gme Cctv | Gme Cctv | — | (650) 589 9981 | Other | So San Francisco · San Mateo County | — | — |
| Gmz Landscaping INC | Gomez Rafael | — | (650) 533 8094 | Windows, patio, painters | Redwood City · San Mateo County | — | — |
| Gnetzer General Contractor | Gnetzer General Contractor | — | (415) 306 6019 | GC, remodel, ADU | Daly City · San Mateo County | — | — |
| Go Native INC | Harold David Sands | victor@caautobody.com | (916) 331-2626 | Windows, patio, painters | Montara · San Mateo County | — | — |
| Godoy INC | Abelino Godoy Oseguera | — | (650) 219 0347 | GC, remodel, ADU | Moss Beach · San Mateo County | — | — |
| Gold Chimney | Gold Chimney | — | (415) 571 9923 | Other | Loma Mar · San Mateo County | — | — |