| General Drain Experts & Leak Detection INC | Roberto De Jesus De Artiga | — | (510) 453 7090 | Other | Oakland · Alameda County | — | — |
| General Roofing Company | Shane Michael Wakerling | — | (510) 536 3356 | Other roofers | Oakland · Alameda County | — | — |
| General Services Construction Gsc INC | Pirouz Alireza | — | (925) 570 3788 | GC, remodel, ADU | Dublin · Alameda County | — | — |
| Generation Painting & Decorating INC | Francisco Antonio Barrera Martinez | — | (510) 246 9920 | Windows, patio, painters | Oakland · Alameda County | — | — |
| Genesis Builders Group INC | Seeligmann Israel Zelaya Carranza | — | (415) 580 8805 | Electricians | Hayward · Alameda County | — | — |
| Genesis Communications | Genesis Communications | — | (510) 760 5105 | Other | Hayward · Alameda County | — | — |
| Genesis Construction | Liu Louis | — | (510) 386 4377 | GC, remodel, ADU | Union City · Alameda County | — | — |
| Genesis Flooring INC | Becquer Arodi Carias | — | (209) 814 5474 | Other | Hayward · Alameda County | — | — |
| Gentry Stanley | Gentry Stanley | gentry@myguardianinc.com | (310) 982 5012 | GC, remodel, ADU | Emeryville · Alameda County | — | — |
| Genuine Plastering | Genuine Plastering | — | (510) 754 0466 | Other | Hayward · Alameda County | — | — |
| Geo Grout Ground Modification Specialist INC | Joyc Adams | — | (415) 860 9787 | Other | Pleasanton · Alameda County | — | — |
| George E Masker INC | Alan Arthur Bjerke | — | (510) 568 1206 | Windows, patio, painters | Oakland · Alameda County | — | — |
| George High Construction Co | George Danial Iii High | — | (510) 828 1235 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| George Mamoulelis | George Mamoulelis | — | (510) 875 0353 | Electricians | San Leandro · Alameda County | — | — |
| George Mc Neil & Company | George Andrew Mc Neil | — | (510) 548 3160 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| George Plumbing Services INC | Jorge Patricio Carvajal Anastacio | — | (510) 943 8444 | Other | Hayward · Alameda County | — | — |
| George Thayer Painting | George Thayer Painting | — | (510) 332 9272 | Windows, patio, painters | Alameda · Alameda County | — | — |
| George Vance Carder Jr | George Vance Carder Jr | — | (510) 523 7752 | GC, remodel, ADU | Alameda · Alameda County | — | — |
| Georgios Lampropoulos | Georgios Lampropoulos | — | (925) 998 9495 | GC, remodel, ADU | Castro Valley · Alameda County | — | — |
| Gerald Franklin Stater | Gerald Franklin Stater | — | (925) 337 2203 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| Gerald Long | Gerald Long | — | (669) 262 7610 | Other | Hayward · Alameda County | — | — |
| Germino's Horticultural Services | Michael Byrnes Germino | — | (510) 589 5127 | Windows, patio, painters | San Leandro · Alameda County | — | — |
| Gerver Rodriguez | Gerver Rodriguez | — | (510) 326 2251 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Gh Builder | Gh Builder | — | (510) 507 2700 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Ghirardelli Construction | William Augustus Iii Ghirardelli | — | (910) 834 3018 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Ghost Dance Construction Company | Jon Royal Van Heuit | — | (510) 334 0634 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Giampolini & Co | Joshua Aaron Jones | giampolini-logo-rgb_masonry_leftaligned_white@80pxtall.svg | (415) 673 1236 | Windows, patio, painters | Emeryville · Alameda County | — | — |
| Giampolini / Courtney | Thomas Delong Quilici | — | (415) 673 1236 | GC, remodel, ADU | Emeryville · Alameda County | — | — |
| Giampolini Drywall | Brady Scott Quilici | — | (415) 673 1236 | Windows, patio, painters | Emeryville · Alameda County | — | — |
| Giant Construction INC | Daniel Allen Wood | — | (510) 972 8725 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Giant H V A C INC | Jose Miguel Novelo | — | (510) 624 4268 | HVAC | Fremont · Alameda County | — | — |
| Giant Hauling & Demolition INC | Brayner Victor Felix Alcantara Diniz | — | (650) 834 6677 | Other | Oakland · Alameda County | — | — |
| Giant Property Service | Shui Cheong Fong | — | (510) 517 0983 | Electricians | San Leandro · Alameda County | — | — |
| Gibbons And Sons Builders | Gibbons And Sons Builders | — | (925) 285 4790 | GC, remodel, ADU | Pleasanton · Alameda County | — | — |
| Gibson Development And Construction | Nicholas James Gibson | — | (408) 710 9692 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| Gil Ramirez Construction | Toan Van Pham | — | (510) 692 8977 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Gilbert Tile | Gilbert Tile | — | (510) 207 4975 | Other | Oakland · Alameda County | — | — |
| Gilmore Construction | Devin Allman Gilmore | — | (925) 364 1956 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Gin Lam Electric | Gin Chung Lam | — | (510) 500 7301 | Electricians | Oakland · Alameda County | — | — |
| Giulio Salarpi | Giulio Salarpi | — | (510) 769 8620 | Other | Alameda · Alameda County | — | — |
