| Gabion Structural Engineer Inc | B | 2023 | Active |
| Gadget Construction Inc | B | 2025 | Active |
| Gaehwiler M Construction Inc | B + C4, C36 | 1987 | Active |
| Gaelic Construction | B | 2005 | Active |
| Gallagher Construction Inc | B + C8 | 1994 | Active |
| Gamabuilt | B | 2017 | Active |
| Gao Construction Inc | B | 2022 | Active |
| Gao's Group | B | 2015 | Active |
| Gartan Construction LLC | B | 2018 | Active |
| Gateway Roofing And Waterproofing Inc | B + C39 | 2001 | Active |
| Gauts Construction | B | 2026 | Active |
| Gbi Construction LLC | B | 2024 | Active |
| Gci Inc | B | 1994 | Active |
| Gci Management & Construction Consulting | B | 2009 | Active |
| GDH Roofing & Building Inc | A, B + C39 | 2021 | Active |
| Gech Inc | A, B + C10, C36 | 2006 | Active |
| Gecms Inc | A, B + C8, C21, D49 | 2010 | Active |
| Genesis Residential Construction | B | 2018 | Active |
| Genteel Plumbers Inc The | B + C36 | 2017 | Active |
| Gerson Construction Inc | B | 2023 | Active |
| Get Built Construction | B | 2022 | Active |
| GH Construction Inc | B | 2024 | Active |
| Giant Work Construction Corp | B | 2023 | Active |
| Gilligan Luke Inc | B | 1995 | Active |
| GJ Chavez Inc | B | 2018 | Active |
| Glam Construction Inc | B + C39 | 2019 | Active |
| Glen Canyon Properties Inc | B | 2014 | Active |
| Go - Mex Construction Inc | B | 2009 | Active |
| Gold Mountain Investments Inc | B + C51 | 2016 | Active |
| Gold Spring Construction Co | B | 2005 | Active |
| Golden A Plus Construction Inc | B + C10 | 2026 | Active |
| Golden Dragon Construction Inc | B | 2014 | Active |
| Golden Gate Interiors | B | 2021 | Active |
| Golden Gate Premier Construction LLC | B | 2026 | Active |
| Golden Gate Tank Removal Inc | A + HAZ | 1991 | Active |
| Golden Housing Construction Inc | B | 2023 | Active |
| Golden Star Floor Service Inc | B + C15 | 2003 | Active |
| Golden State Adu Builders Inc | B | 2026 | Active |
| Golden State Construction And Utility Inc | A | 2020 | Active |
| Gomez E F Cement Contractor Inc | A + C8, D56 | 1993 | Active |
| Gonzalez Painting LLC | B + C33, C36 | 2010 | Active |
| Good Builders Inc | B | 2013 | Active |
| Good Vibes Design & Build Inc | B | 2026 | Active |
| Goplan Builders Inc | B | 2026 | Active |
| Gordon Aaron Construction Inc | B | 2005 | Active |
| Gorman Pipeline Inc | A | 2007 | Active |
| Gorsneg Construction | A, B + C10, C20, C36 | 2022 | Active |
| Graphitebuild | B | 2021 | Active |
| Great Escape Service & Inspections | B | 2002 | Active |
| Great Ocean Construction Inc | B | 2023 | Active |
| Green Infrastructure Solutions | A | 2024 | Active |
| Green Metro Inc | B + C15 | 2003 | Active |
| Green Oak Builders Inc | B | 2019 | Active |
| Green Options Contractors | B | 2010 | Active |
| Greentree Maintenance | B | 2023 | Active |
| Ground Control Inc | A + C21, C27, C31 +2 | 2018 | Active |
| GSW Construction Inc | A + HAZ | 2022 | Active |
| Gurman Construction | B | 2016 | Active |
| Gurrane Group | B | 1992 | Active |
| Guzman Construction Group Inc | B | 2016 | Active |
| Guzman-Focon JV | B | 2026 | Active |
| Guzman-Marinship JV | A, B | 2023 | Active |
| H & Bo Construction Inc | B | 1990 | Active |
| H & L Construction Inc | B + C16, C36 | 2016 | Active |
| H K Z Construction | B | 2016 | Active |
| H T Contractors Inc | B | 2013 | Active |
| H Y Construction Inc | B | 2005 | Active |
| Habitat For Humanity Greater San Francisco Inc | B | 1996 | Active |
| Halyard Inc | B + C10 | 2019 | Active |
| Hamerkop Construction Inc | B | 2020 | Active |
| Hammerhouse Construction | B | 2002 | Active |
| Handy Jobs Inc | B | 2011 | Active |
| Handyman Heroes Inc | B + C36 | 2015 | Active |
| Hang C Construction Inc | B | 1999 | Active |
| Happywood Construction LLC | B | 2026 | Active |
| Harp Construction LLC | A | 2012 | Renew by Dec 31, 2026 |
| Harrison Drywall Inc | B + C9, C35 | 1991 | Active |
| Hathaway Dinwiddie / Nibbi Joint Venture | B | 2014 | Active |
| Hathaway Dinwiddie Construction Company | A, B | 1996 | Renew by Nov 30, 2026 |
| Hathaway Dinwiddie Construction Group | B | 1997 | Active |
| Hawk Hill Construction Inc | B | 2024 | Renew by Dec 31, 2026 |
| Hawke Building Company | B | 2010 | Active |
| Hawthorne Construction Management | B | 2024 | Active |
| Hayasa Construction Inc | B | 2020 | Active |
| He & Kuang Inc | B | 2007 | Active |
| Heart SF Construction Corporation | B | 2024 | Renew by Dec 31, 2026 |
| Hearth Corporation | B | 2010 | Renew by Dec 31, 2026 |
| Heaven's Earth Co Inc | A, B + C10, C16, C20 +1 | 2001 | Active |
| Heidis House Construction | B + C36 | 2018 | Active |
| Heirloom Builders Inc | B | 2019 | Active |
| Heises Plumbing | A + C10, C20, C36 | 2022 | Active |
| Helios Infrastructure Inc | B | 2026 | Active |
| Hello Handy LLC | B | 2025 | Active |
| Hengda Construction Incorporated | B | 2016 | Active |
| Hernandez Engineering | A + C31 | 1998 | Active |
| Herrero Boldt Webcor JV | B | 2020 | Active |
| Herrero Builders Incorporated | B | 1955 | Renew by Nov 30, 2026 |
| Herrero Construction Corporation | B | 2011 | Active |
| Herreroboldt LLC | B | 2018 | Active |
| Hetherington Mechanical & Plumbing | B + C4, C10, C16 +1 | 1993 | Active |