| Grand Builders General Construction INC | Claudia Gabina Cali | — | (650) 430 1076 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Grand Scaffolds INC | Esperanza Flores | — | (209) 303 8800 | Other | Patterson · Stanislaus County | — | — |
| Great West Paving | Richard Dick Stanley | greatwestpaving@yahoo.com | (209) 345 7161 | Other | Turlock · Stanislaus County | — | — |
| Green California Total Landscaping | Green California Total Landscaping | — | (209) 985 9812 | Windows, patio, painters | Ceres · Stanislaus County | — | — |
| Green Construction | Vernon Daniel Green | — | (209) 605 0179 | GC, remodel, ADU | Oakdale · Stanislaus County | — | — |
| Green Horizon INC | Joseph Manuel Mattos | — | (209) 669 1734 | Windows, patio, painters | Turlock · Stanislaus County | — | — |
| Green Valley Tree Service INC | Mario Mendoza | greenvalleytreeservice@yahoo.com | (209) 602 9611 | Tree | Hughson · Stanislaus County | — | — |
| Greene's Custom Painting & Decorating | Nick Aly Greene | — | (209) 526 5533 | Windows, patio, painters | Ceres · Stanislaus County | — | — |
| Greenside Landscape Services INC | Nestor Jr Morales | — | (209) 602 5527 | Windows, patio, painters | Turlock · Stanislaus County | — | — |
| Greg Barzan Construction | Gregory Allan Barzan | — | (209) 523 8570 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Greg Collins-general Contractor | Greg Collins-general Contractor | — | (209) 604 0506 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Greg L Ellis | Greg L Ellis | — | (209) 578 0319 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Gregory Brien Reed | Gregory Brien Reed | — | (209) 577 2449 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Gregory Dunger Construction | Gregory Douglas Dunger | — | (209) 338 7575 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Grey Hawk Construction Incorporated | Brandon Christopher Muhammad | — | (510) 435 5140 | GC, remodel, ADU | Patterson · Stanislaus County | — | — |
| Grid Electric | Timothy Howard Ash | — | (408) 316 3859 | Electricians | Oakdale · Stanislaus County | — | — |
| Griffin's Home Renovation | Griffin's Home Renovation | — | (209) 604 4974 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Grind Stone Tops | Grind Stone Tops | — | (209) 557 0700 | Other | Modesto · Stanislaus County | — | — |
| Grover Custom Builders INC | Connie Lynn Grover | — | (209) 501 6486 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Grover Landscape Services INC | Andrew Paul Grover | — | (209) 545 4401 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Grtview Construction | Amandeep Singh | — | (209) 289 6339 | GC, remodel, ADU | Keyes · Stanislaus County | — | — |
| Gsp Power | Mike Tay | info@gsppower.com | (209) 613 2604 | Electricians | Modesto · Stanislaus County | — | — |
| Guardado General Builders INC | Guardado Mendez Antonio | — | (209) 918 7117 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Guenzi Electric INC | Gary Dean Guenzi | — | (209) 505 5951 | Electricians | Modesto · Stanislaus County | — | — |
| Guerra Plumbing | Guerra Plumbing | — | (408) 888 9000 | Other | Modesto · Stanislaus County | — | — |
| Guerreros Tile And Marble | Guerreros Tile And Marble | — | (209) 535 6900 | Other | Modesto · Stanislaus County | — | — |
| Gutierrez Concrete | Francisco Gutierrez | — | (209) 646 7492 | Other | Turlock · Stanislaus County | — | — |
| Gutt R Done Raingutters | Gutt R Done Raingutters | — | (209) 614 0606 | Other | Modesto · Stanislaus County | — | — |
| Gutter Buddy Ca LLC | Brandon Joseph Cornell | office@gutterbuddyca.com | (209) 499 0811 | Other | Salida · Stanislaus County | — | — |
| Guzman Woodwork | Guzman Woodwork | — | (925) 565 8730 | Other | Patterson · Stanislaus County | — | — |
| Gv Flooring Contractor | Gv Flooring Contractor | — | (209) 495 5319 | Other | Turlock · Stanislaus County | — | — |
| Gz Construction | Luis Manuel Gonzalez Munoz | — | (209) 427 5525 | GC, remodel, ADU | Newman · Stanislaus County | — | — |
| H & G Remodels | Milton Ulises Velasquez Diaz | — | (209) 496 8846 | GC, remodel, ADU | Turlock · Stanislaus County | — | — |
| H & H Elite Carpentry Corp | Hector Eduardo Sanchez | hesl@hhelitecarpentry.com | (209) 914 4978 | Other | Patterson · Stanislaus County | — | — |
| H & Q Builder Rite INC | Quoc Bao Nguyen | — | (209) 294 6668 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| H 2 0 Pools By Mark Arnold | Mark Allen Arnold | — | (209) 482 5266 | Pool | Modesto · Stanislaus County | — | — |
| H 2 Construction INC | Henry X Huang | — | (510) 637 8788 | GC, remodel, ADU | Riverbank · Stanislaus County | — | — |
| H C Hardwood Floors | Genry Mizael Colli | — | (650) 716 6520 | Other | Modesto · Stanislaus County | — | — |
| H H Electrical | Hanna Oraha Hanna | — | (408) 470 8183 | Electricians | Turlock · Stanislaus County | — | — |
| H3 Drywall INC | Martin Alejandro Hernandez Morales | — | (415) 845 5280 | Other | Modesto · Stanislaus County | — | — |