| Greenline Cabinets Countertops | David Lee | — | (877) 498 0555 | Other | Fremont · Alameda County | — | — |
| Greenridge Electric LLC | Brian Patrick Scanlon | — | (925) 324 4094 | Electricians | Hayward · Alameda County | — | — |
| Greg Jones Construction | Gregory Arthur Jones | — | (510) 750 2609 | Other | Fremont · Alameda County | — | — |
| Greg Jones Roofing LLC | Erick Jimenez-Sanchez | — | (650) 720 2677 | Other roofers | Hayward · Alameda County | — | — |
| Greg Laird Cabinetry | Greg Laird Cabinetry | gregdlaird@gmail.com | (785) 230 5152 | Other | Oakland · Alameda County | — | — |
| Greg Marell | Greg Marell | — | (510) 338 0234 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Greg Van Wagoner Construction INC | Gregory Ryan Van Wagoner | — | (925) 595 0979 | GC, remodel, ADU | Pleasanton · Alameda County | — | — |
| Greg Wehrman Construction | Gregory David Wehrman | — | (510) 314 6877 | Electricians | San Leandro · Alameda County | — | — |
| Greg's Hardwood Floors | Greg's Hardwood Floors | gregshardwoodfloors@comcast.net | (510) 376 3338 | Other | Livermore · Alameda County | — | — |
| Gregory Michael Brazil | Gregory Michael Brazil | — | (510) 527 6600 | Electricians | Albany · Alameda County | — | — |
| Gregory Property Management INC | Gregory Property Management INC | — | (510) 227-0894 | Property managers | Alameda · Alameda County | — | — |
| Greytower General Contractors | Thomas John Grealis | — | (415) 559 3333 | Electricians | Oakland · Alameda County | — | — |
| Grid Alternatives | Erica Beth Mackie | — | (510) 731 1310 | Electricians | Oakland · Alameda County | — | — |
| Gridscape Energy Solutions INC | Richard Henry Rodriguez | — | (510) 894 6030 | Electricians | Fremont · Alameda County | — | — |
| Griffin Construction | Thomas Richard Griffin | — | (530) 412 3907 | GC, remodel, ADU | Alameda · Alameda County | — | — |
| Griffin Construction | Brandon Quincy Griffin | — | (510) 290 0212 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Griffin Construction Services | Brian Alexander Griffin | — | (510) 246 1394 | GC, remodel, ADU | Castro Valley · Alameda County | — | — |
| Griggs Construction | Jordan Cohen Griggs | — | (510) 387 1005 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Grind And Hustle LLC | Braulio Barraza | — | (323) 632 4457 | Electricians | Fremont · Alameda County | — | — |
| Grizzly Builders INC | Serrano Alejandro | grizzlybuilders@gmail.com | (415) 812 4154 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Grogan Construction | Clark Grogan Tiumalu | — | (510) 471 7409 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| Groland Landscape LLC | Moises Bustamante | — | (510) 278 7236 | Windows, patio, painters | San Lorenzo · Alameda County | — | — |
| Grove Gill Electric Company DBA Gill's Electric | James Henry Jr Cahill | — | (510) 451 2929 | Electricians | Oakland · Alameda County | — | — |
| Grow Builders INC | Jeffery Brian Antrim | — | (925) 980 9977 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| Grp Electric INC | Gustavo Aroldo Ruano Perez | — | (415) 823 2516 | Electricians | Oakland · Alameda County | — | — |
| Gs Fine Finishers | Andrew John Bertenshaw | info@gsfinefinishers.com | (925) 699 0611 | Other | Pleasanton · Alameda County | — | — |
| Gsl Construction | John Earl Jr Redfern | — | (925) 371 3350 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| Gsr INC | Allan James Champion | — | (510) 885 0400 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Gte Construction & Roofing | Oscar Rigoberto Lopez Perez | — | (925) 452 7630 | Other roofers | Dublin · Alameda County | — | — |
| Gtm Roofing Services LLC | Meyder Elenilson Sr Garcia Tobar | — | (415) 608 0857 | Other roofers | Oakland · Alameda County | — | — |
| Gu Development INC | Cyrus Hang Fai Cheung | — | (650) 587 8648 | Electricians | Fremont · Alameda County | — | — |
| Gualberto A Medeiros | Gualberto A Medeiros | — | (925) 998 3818 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| Guangren Shao | Guangren Shao | — | (650) 466 6666 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Guardian Construction | Nancy Friday | — | (510) 990 2386 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Guardian Firestop And Insulation LLC | Troy Allen Geier | — | (925) 449 7413 | Other | Livermore · Alameda County | — | — |
| Gudiel Abizai Bran Ramirez | Gudiel Abizai Bran Ramirez | — | (510) 857 2746 | GC, remodel, ADU | Newark · Alameda County | — | — |
| Guerrero Brothers Construction INC | Juan Carlos Guerrero | — | (510) 418 0331 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Guerreros Concrete Pumping | Guerreros Concrete Pumping | — | (510) 714 8854 | Other | Newark · Alameda County | — | — |
| Guerreros Electric INC | Juan Carlos Guerrero | — | (510) 409 3627 | Electricians | Berkeley · Alameda County | — | — |
| Guillen's Painting INC | Ramon Wilfredo Guillen Quispe | contact@sansoxygen.com | (510) 812 6779 | Windows, patio, painters | Castro Valley · Alameda County | — | — |