| Gk Construction | Wing Kuen Hip | — | (510) 928 3036 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Gk Construction | Gary David Knowles | — | (925) 525 7110 | GC, remodel, ADU | Pleasanton · Alameda County | — | — |
| Gladcap Ventures INC | Anthony Joseph Jr Podyma | — | (925) 600 1130 | Other | Pleasanton · Alameda County | — | — |
| Gladiator Rooter And Plumbing | Victor Puente Morales | — | (510) 351 6700 | Other | San Leandro · Alameda County | — | — |
| Gladiator Sewer And Drain Masters | Gladiator Sewer And Drain Masters | — | (510) 224 7570 | Other | Oakland · Alameda County | — | — |
| Gladney Painting | Gladney Painting | — | (510) 807 5982 | Windows, patio, painters | San Leandro · Alameda County | — | — |
| Gladstone Construction | Daniel James Gladstone | — | (510) 283 3678 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Glass Doctor Of Bay Area | Glass Doctor Of Bay Area | — | (510) 378 8449 | Windows, patio, painters | Union City · Alameda County | — | — |
| Glass Innovations INC | Armando Martinez-Sanchez | — | (510) 677 0959 | Windows, patio, painters | Hayward · Alameda County | — | — |
| Glass Monkey | Glass Monkey | — | (510) 395-7475 | Windows, patio, painters | Alameda · Alameda County | — | — |
| Glass Work | Glass Work | — | (510) 899 0386 | Windows, patio, painters | Berkeley · Alameda County | — | — |
| Glassall Incorporated | Gordafkan Ali | — | (415) 431 3202 | Windows, patio, painters | Hayward · Alameda County | — | — |
| Glasstek | Glasstek | — | (510) 217-8210 | Windows, patio, painters | Alameda · Alameda County | — | — |
| Glaze Electric | Robert Harrison Glaze | — | (510) 352 9437 | Electricians | San Leandro · Alameda County | — | — |
| Glazier Steel INC | Terry Rosine Glazier | — | (510) 471 5300 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Glenmoor Pool Service | Stephen Daniel Koopen | — | (510) 506 5549 | Pool | Fremont · Alameda County | — | — |
| Glenn Kamei & Co INC | Edgar Takami Kamei | — | (510) 795 1450 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Glenn Nathaniel Smith | Glenn Nathaniel Smith | — | (925) 321 0625 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| Glenview Key & Lock INC | Deborah Lynn Long | — | (510) 530 6141 | Other | Oakland · Alameda County | — | — |
| Glez Painting | Glez Painting | — | (510) 649 8584 | Windows, patio, painters | Berkeley · Alameda County | — | — |
| Global Construction And Development | Edward Suma Kamara | — | (510) 599 2167 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Global Engineering & Construction Corp | Mashal Homayun Akbari | — | (341) 216 4354 | Other | Dublin · Alameda County | — | — |
| Global Fire Protection INC | Bereket Aman Teklebrehan | — | (510) 851 2797 | Other | Oakland · Alameda County | — | — |
| Global Gutter Screens INC | David Hahne | — | (925) 400 4600 | Other | Livermore · Alameda County | — | — |
| Global Painting LLC | Cornejo Maldonado Catalino | — | (650) 868 7223 | Windows, patio, painters | Hayward · Alameda County | — | — |
| Global Standard Construction | Wen Jia Feng | — | (415) 939 3238 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| Global Standard Construction INC | Wen Jia Feng | — | (415) 939 3238 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| Glover & Son Heating & Air Conditioning INC | Robert Allen I Glover | — | (510) 657 6741 | HVAC | Newark · Alameda County | — | — |
| Glow Electric | Dave John Linton | glowelectricinc@gmail.com | (510) 551 6185 | Electricians | Oakland · Alameda County | — | — |
| Gly Construction INC | Guo Liang Yan | — | (415) 637 8393 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Gm Ironwood Construction INC | Gerardo Mauricio Gonzalez Mendoza | — | (510) 479 2809 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Gm Remodeling | Marino Mamoulelis | — | (510) 290 6231 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| Gm Truck Rental INC | Gustavo Caro Delgadillo | — | (510) 783 1818 | Other | San Lorenzo · Alameda County | — | — |
| Gml Elite Builders | Gerson A Paiz | — | (510) 200 2792 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| Gms Audio Visual INC | Dapeng Li | — | (510) 400 8635 | Other | Hayward · Alameda County | — | — |
| Gms Boiler Services | Mikhail Sergeevich Gruminskii | — | (628) 225 9813 | HVAC | Pleasanton · Alameda County | — | — |
| Gnc Buildwell Construction INC | Hyun Chul Kim | — | (510) 828 2299 | Electricians | Dublin · Alameda County | — | — |
| Gnd Home Renovations INC | Wilber Alexander Moran Palma | — | (510) 491 5634 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Go Microgrid DBA Akh Construction | Kemp-hesterman Aaron | — | (510) 292 8721 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Go Overboard Construction | Robert Daniel Sheppard | — | (510) 938 5083 | GC, remodel, ADU | Newark · Alameda County | — | — |