| G R C Roofing Co | Gerardo Ramirez Chavez | — | (510) 568 0531 | Other roofers | Oakland · Alameda County | — | — |
| G R Construction | Rodriguez Gerardo | — | (510) 566 0736 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| G R V Homeimprovement | G R V Homeimprovement | — | (510) 333 5399 | Electricians | Castro Valley · Alameda County | — | — |
| G S E Construction Company INC | Adam Talbot Kersten | — | (925) 447 0292 | Electricians | Livermore · Alameda County | — | — |
| G S H Electric | Gregory Scott Hennings | — | (510) 468 1984 | Electricians | Pleasanton · Alameda County | — | — |
| G T Construction | Golden Toan Van Thai | info@gtconstruction.com | (510) 368 0233 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| G T General Contractor | G T General Contractor | — | (510) 303 6394 | GC, remodel, ADU | Pleasanton · Alameda County | — | — |
| G V N Construction | Giang Van Nguyen | info@gvnconstruction.com | (510) 926 5128 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| G X Construction Co | Gan Xin Wu | — | (415) 725 0938 | GC, remodel, ADU | Castro Valley · Alameda County | — | — |
| G2 Ultimate Construction | Shane Myles Maier | — | (510) 673 9634 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| Gabel Construction | Eric Paul Gabel | — | (925) 321 1860 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| Gabes Plumbing Service & Repair | Gabriel Kirk Patten | — | (510) 409 3585 | Other | Oakland · Alameda County | — | — |
| Gaea Construction | Henry Kwong-hung Wong | — | (415) 749 2704 | GC, remodel, ADU | Alameda · Alameda County | — | — |
| Galaxia Concrete Corporation | Ortiz Gomez Miguel | — | (510) 990 1050 | Other | Hayward · Alameda County | — | — |
| Galaxy Fence Co | Espinosa Sanchez Arturo | info@galaxyfence.com | (510) 364 3466 | Other | Fremont · Alameda County | — | — |
| Galaxy Plumbing INC | Gildardo Roman | interested@domainmarket.com | (925) 628 3882 | Other | Hayward · Alameda County | — | — |
| Galaxy Rooter | Galaxy Rooter | galaxyrooter@yahoo.com | (925) 577 8770 | Other | Pleasanton · Alameda County | — | — |
| Galeana Glazing LLC | Galeana Mario | — | (510) 329 5812 | Windows, patio, painters | Emeryville · Alameda County | — | — |
| Galindo Painting | Galindo Painting | carlos@galindopainting.com | (415) 730 1454 | Windows, patio, painters | San Leandro · Alameda County | — | — |
| Gallagher & Lindsey Property Management INC | Gallagher & Lindsey Property Management INC | info@alamedarentals.com | (510) 522-3322 | Property managers | Alameda · Alameda County | — | — |
| Gallegos Flooring INC | Manuel Enrique Rodriguez Gallegos | — | (510) 993 9947 | Other | Hayward · Alameda County | — | — |
| Gallegos Painting | Gallegos Painting | gallegospaintingco@gmail.com | (510) 680 6630 | Windows, patio, painters | Castro Valley · Alameda County | — | — |
| Galvan Plastering And Stucco INC | Manuel Everardo Galvan Barrera | — | (650) 716 6530 | Other | Hayward · Alameda County | — | — |
| Gamaliel Villatoro Painting LLC | Diego Armando Palacios | — | (510) 919 1987 | Windows, patio, painters | San Lorenzo · Alameda County | — | — |
| Gamble Painting | Gamble Painting | — | (510) 228 8574 | Windows, patio, painters | Oakland · Alameda County | — | — |
| Gancos & Sons | Gancos & Sons | — | (925) 699 8039 | Other | Livermore · Alameda County | — | — |
| Gandolfo Excavating INC | Robert John Gandolfo | — | (925) 766 7261 | Other | Livermore · Alameda County | — | — |
| Gao Wu Construction INC | Zheng Cheng Wu | — | (415) 710 8826 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Gaohui Construction | Gao Hui | — | (415) 203 7359 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Gar-cal Corporation | Garcia-mayorga Angel | — | (925) 523 3682 | Other roofers | Livermore · Alameda County | — | — |
| Gar-cal Group | Angel Garcia-Mayorga | — | (925) 413 4001 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| Garage Doors Unlimited | Garage Doors Unlimited | garagedoorsunlimited@hotmail.com | (925) 829 1770 | Other | Dublin · Alameda County | — | — |
| Garage Living Ca LLC DBA Garage Living San Francisco Synthetic | Tal Aviram | — | (206) 949 9148 | Other | Hayward · Alameda County | — | — |
| Garakani Professional Group INC | Hoss Garakani | — | (510) 522 2121 | GC, remodel, ADU | Alameda · Alameda County | — | — |
| Garcia And Son Electric INC | Edward Alan Garcia | — | (510) 517 1264 | Electricians | Berkeley · Alameda County | — | — |
| Garcia Home Renovations LLC | Cuevas Joan Garcia | — | (925) 784 9706 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| Garden Architecture | Garden Architecture | — | (510) 915 3333 | Windows, patio, painters | Berkeley · Alameda County | — | — |
| Garden Form And Composition | Garden Form And Composition | — | (510) 658 4941 | Windows, patio, painters | Oakland · Alameda County | — | — |
| Garden Mamas | Tamara Virginia Qirreh | hello@gardenmamas.com | (415) 463 0781 | Windows, patio, painters | Alameda · Alameda County | — | — |
| Garden Of Eden Landscapes INC DBA Ground Force Enterprises | Carlos Philip Teixeira | — | (510) 512 6055 | Windows, patio, painters | Castro Valley · Alameda County | — | — |