| Greg Sheehan Construction INC | Gregory Michael Sheehan | — | (650) 245 8090 | GC, remodel, ADU | San Mateo · San Mateo County | — | — |
| Gregg's Plumbing & Heating INC | Dolling Gregg | — | (650) 518 1347 | HVAC | San Mateo · San Mateo County | — | — |
| Gregory Michael Sheehan | Gregory Michael Sheehan | — | (650) 245 8090 | GC, remodel, ADU | San Mateo · San Mateo County | — | — |
| Gregory Pemberton Designs Incorporated | Gregory Alan Pemberton | — | (650) 520 5490 | Other | Half Moon Bay · San Mateo County | — | — |
| Greystone Tile | Greystone Tile | — | (650) 537 0735 | Other | San Mateo · San Mateo County | — | — |
| Grgich Electric Company INC | Stephen Nicholas Grgich | michael@grgichelectric.com | (415) 441 6767 | Electricians | Daly City · San Mateo County | — | — |
| Griffin And Sons Construction INC | Gerald Michael Griffin | — | (650) 851 9317 | GC, remodel, ADU | Woodside · San Mateo County | — | — |
| Griffin Painting INC | Mark Hillary Griffin | — | (650) 368 3190 | Windows, patio, painters | Redwood City · San Mateo County | — | — |
| Griscom Construction | Griscom Andrew | — | (650) 796 1000 | GC, remodel, ADU | Menlo Park · San Mateo County | — | — |
| Grok Construction Group INC | Jehoon Chun | — | (650) 773 5317 | GC, remodel, ADU | San Mateo · San Mateo County | — | — |
| Ground Logic | Ground Logic | — | (650) 240 9386 | Windows, patio, painters | Belmont · San Mateo County | — | — |
| Groundwork Landscape & Construction INC DBA Groundwork Outdoor | Kristopher Lee Dasso | — | (650) 395 7405 | Windows, patio, painters | San Carlos · San Mateo County | — | — |
| Grove Construction | Ronald Ray Grove | — | (650) 839 1194 | GC, remodel, ADU | San Carlos · San Mateo County | — | — |
| Grovisors INC | Manandeep Singh | — | (650) 699 6100 | Other roofers | San Mateo · San Mateo County | — | — |
| Growing Planet Builders | Growing Planet Builders | — | (415) 999 9313 | GC, remodel, ADU | Millbrae · San Mateo County | — | — |
| Growstar Builders | Growstar Builders | — | (650) 537 3368 | GC, remodel, ADU | Pacifica · San Mateo County | — | — |
| Gruber Plumbing | Gruber Plumbing | anapbm@gmail.com | (415) 816 5475 | Electricians | Moss Beach · San Mateo County | — | — |
| Gtile650 | Aleman Baltazar Olivar | — | (650) 520 0883 | Other | Redwood City · San Mateo County | — | — |
| Gtz Construction | Gutierrez Mario | — | (650) 520 8894 | GC, remodel, ADU | Redwood City · San Mateo County | — | — |
| Guaranteed Contractors INC | Jean Claude Brunache | — | (650) 576 9273 | GC, remodel, ADU | Belmont · San Mateo County | — | — |
| Guardian Construction Group INC | Nicolas G Jr Zamora | info@guardianconstructiongroup.com | (650) 580 0366 | GC, remodel, ADU | San Carlos · San Mateo County | — | — |
| Guenther & Son Steel & Dirt Works | William Nicholas Guenther | — | (650) 224 1521 | Other | La Honda · San Mateo County | — | — |
| Guilia Construction Incorporated | Gerald Jay Iii Chapman | — | (650) 291 7474 | GC, remodel, ADU | San Mateo · San Mateo County | — | — |
| Guillermo Talancon | Guillermo Talancon | — | (650) 464 6414 | GC, remodel, ADU | Redwood City · San Mateo County | — | — |
| Gulf Pillars Trading | Gulf Pillars Trading | — | (650) 346 1332 | GC, remodel, ADU | Burlingame · San Mateo County | — | — |
| Guntren Construction Company | Joseph Theodore Guntren | — | (650) 728 5659 | GC, remodel, ADU | Montara · San Mateo County | — | — |
| Guorui Qin | Guorui Qin | — | (415) 316 9766 | GC, remodel, ADU | South San Francisco · San Mateo County | — | — |
| Guoyun Qin | Guoyun Qin | — | (415) 691 5546 | GC, remodel, ADU | South San Francisco · San Mateo County | — | — |
| Gustav T Horn | Gustav T Horn | — | (415) 601 3556 | GC, remodel, ADU | San Carlos · San Mateo County | — | — |
| Gutierrez Landscaping | Gutierrez Landscaping | — | (650) 954 3071 | Windows, patio, painters | Half Moon Bay · San Mateo County | — | — |
| Guy Plumbing & Heating INC | Alan Richard Guy | — | (650) 854 4221 | HVAC | Menlo Park · San Mateo County | — | — |
| Guzmanc Construction INC | Jose Marcos Cruz Guzman | — | (415) 696 9881 | GC, remodel, ADU | Daly City · San Mateo County | — | — |
| Gws Plumbing & Sewer | Gws Plumbing & Sewer | — | (650) 921 6995 | Other | San Mateo · San Mateo County | — | — |
| H & H Construction | Hosseinzadeh Sina | — | (650) 759 6187 | Electricians | Foster City · San Mateo County | — | — |
| H & Z Construction INC | Haibo Zhang | — | (415) 310 2668 | HVAC | Daly City · San Mateo County | — | — |
| H 2 Construction | Jason Guo Chen | — | (415) 310 9209 | GC, remodel, ADU | Millbrae · San Mateo County | — | — |
| H H Fence And Deck Co | Hernandez Tenorio Leonel | — | (650) 580 5658 | Windows, patio, painters | San Bruno · San Mateo County | — | — |
| H M Integrated Services Incorporated | Armando Banuelos Limcaco | — | (650) 245 7631 | Other | San Mateo · San Mateo County | — | — |
| H M W Development INC | Walter Mucun Huang | — | (415) 806 8992 | Electricians | San Mateo · San Mateo County | — | — |
| H Q Construction | Quinonez Hector | — | (415) 823 7745 | GC, remodel, ADU | Brisbane · San Mateo County | — | — |