| Gryko Flooring INC | Gryko Jaroslaw | — | (510) 928 7409 | Other | Moraga · Contra Costa County | — | — |
| Gt Power Construction INC | Christopher Eric Zanetta | — | (510) 283 1588 | Electricians | Concord · Contra Costa County | — | — |
| Gt Pro Painting INC | Epstein Alexander | — | (925) 250 2803 | Windows, patio, painters | Oakley · Contra Costa County | — | — |
| Guardian Removable Pool Fence Systems Of The Bay Area | Da Re Steven | — | (925) 693 0520 | Other | Clayton · Contra Costa County | — | — |
| Guerra Bros Plumbing INC | Rodrick Jaime Guerra | service@guerrabrosplumbing.com | (925) 771-9886 | Other | Concord · Contra Costa County | — | — |
| Guerrero Flooring | Guerrero Flooring | — | (510) 804 4468 | Other | Richmond · Contra Costa County | — | — |
| Guidry Construction Co | Barry Dale Guidry | — | (925) 519 2445 | GC, remodel, ADU | Discovery Bay · Contra Costa County | — | — |
| Guillermo Ramon Abad | Guillermo Ramon Abad | — | (510) 331 6152 | Windows, patio, painters | Pittsburg · Contra Costa County | — | — |
| Guillermo's Painting | Guillermo's Painting | — | (925) 759 7564 | Windows, patio, painters | Antioch · Contra Costa County | — | — |
| Gulf Construction Co | Max Moshiry | info@gulf-construction.com | (408) 605 0066 | GC, remodel, ADU | Walnut Creek · Contra Costa County | — | — |
| Gunari Construction INC | Brett Allen Gunari | — | (925) 984 3741 | GC, remodel, ADU | Alamo · Contra Costa County | — | — |
| Gus Fajardo Construction | Fajardo Gustavo | — | (925) 212 0061 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| Gusco Building Maintenance INC | Perfecto-garcia Gustavo | — | (925) 435 3304 | GC, remodel, ADU | Martinez · Contra Costa County | — | — |
| Gustafson Design & Construction | Leann Maureen Gustafson | — | (510) 501 3136 | GC, remodel, ADU | El Cerrito · Contra Costa County | — | — |
| Gustavo Suarez DBA Contours Pro Construction | Suarez Gustavo | — | (925) 395 8795 | GC, remodel, ADU | Antioch · Contra Costa County | — | — |
| Gutter Masters Cleaning And Istallation | Gutter Masters Cleaning And Istallation | — | (510) 517 0084 | Other roofers | Orinda · Contra Costa County | — | — |
| Guzman Construction | Guzman Natividad | — | (510) 967 8192 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| Gv General Contractor INC | Lopez Joel Garcia | — | (510) 600 7826 | GC, remodel, ADU | Richmond · Contra Costa County | — | — |
| Gwc Home Remodeling | Frederick Girdwood Jr Chapman | — | (925) 798 6200 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| Gyc Construction INC | Eugene Vern Yard | — | (206) 370 2809 | GC, remodel, ADU | Oakley · Contra Costa County | — | — |
| H & H Landscaping | H & H Landscaping | — | (510) 376 7478 | Windows, patio, painters | Pittsburg · Contra Costa County | — | — |
| H & R Underground | Franco Horacio | — | (510) 222 5556 | Other | El Sobrante · Contra Costa County | — | — |
| H & S Construction | Singh Hardial | — | (925) 584 0727 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| H Builders LLC | Alfredo Rojas | — | (510) 542 9537 | GC, remodel, ADU | El Sobrante · Contra Costa County | — | — |
| H C Jensen Plumbing INC | George John Piombo | — | (925) 837 4450 | HVAC | Danville · Contra Costa County | — | — |
| H D I Builders | H D I Builders | — | (925) 323 4774 | GC, remodel, ADU | Martinez · Contra Costa County | — | — |
| H D K Associates | Daniel Willis Hugens | dhugens@hdkassociates.com | (925) 366 8543 | GC, remodel, ADU | Alamo · Contra Costa County | — | — |
| H G Enterprises | Harvey Charles Good | — | (510) 691 9432 | GC, remodel, ADU | Richmond · Contra Costa County | — | — |
| H G H Electric INC | Douglas Don Hicks | — | (510) 923 1859 | Electricians | Martinez · Contra Costa County | — | — |
| H G L Construction | Geranmayeh Hamid | — | (925) 324 9004 | GC, remodel, ADU | Walnut Creek · Contra Costa County | — | — |
| H Group Contracting INC | Loc Van Huynh | — | (510) 753 5223 | GC, remodel, ADU | Walnut Creek · Contra Costa County | — | — |
| H H Remodeling | H H Remodeling | — | (925) 726 8229 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| H I & D Construction | Megyesi Zoltan | — | (510) 384 3485 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| H K & S Plumbing Co | Harry John Kotsiomitis | — | (925) 299 9085 | Other | Lafayette · Contra Costa County | — | — |
| H M S | H M S | — | (925) 200 3970 | Other | Walnut Creek · Contra Costa County | — | — |
| H P Construction Services INC | Hamid Reza Pirouz | — | (925) 648 8035 | GC, remodel, ADU | Danville · Contra Costa County | — | — |
| H Proland Landscape | H Proland Landscape | — | (415) 516 6320 | Windows, patio, painters | Hercules · Contra Costa County | — | — |
| H R Hernandez Painting | H R Hernandez Painting | — | (925) 305 4343 | Windows, patio, painters | Walnut Creek · Contra Costa County | — | — |
| H R Marble & Granite INC | Jianhong Zhu | — | (510) 708 0799 | Other | San Ramon · Contra Costa County | — | — |
| H V Usa Enterprises | Olivares Hector Munoz | — | (714) 654 8281 | Other | Antioch · Contra Costa County | — | — |