| Epoxy Crew Inc | B + D12 | 2022 | Active |
| Essential Construction Company | B | 2008 | Active |
| Ethos Environmental Construction | B | 2022 | Active |
| Expression General Remodel Inc | B | 2017 | Active |
| Ez Construction | B | 2024 | Active |
| Fasttrak Construction | B | 2019 | Active |
| FDMR A Valley Link JV | A | 2025 | Active |
| First Call Restoration | B | 2022 | Active |
| Five Star Bath Solutions Of East Bay | B | 2024 | Active |
| Flatiron Dragados-Teichert I-80 Truck Lanes JV | A | 2025 | Active |
| Flatiron-Dragados-Obayashi A Joint Venture | A | 2026 | Active |
| Flatiron-Teichert A Joint Venture | A, B | 2025 | Active |
| Flatiron/Dragados/Sukut Joint Venture | A | 2025 | Active |
| Flatiron/Kiewit A Joint Venture | A, B | 2025 | Active |
| Flatirondragados Aecon A Sites Joint Venture | A | 2026 | Active |
| Flatirondragados Sukut Adsrp Joint Venture | A | 2026 | Active |
| Flatirondragados-Bessac Vista Grande JV | A | 2026 | Active |
| Flatirondragados-Gsb I St Bridge JV | A | 2026 | Active |
| Flatirondragados-Odin A Daguerre JV | A | 2026 | Active |
| Fleece Corp | A | 2007 | Active |
| Fleury's Floor Covering Inc | B + C15, C54 | 1981 | Active |
| Fortify Restoration | B | 2026 | Active |
| Freschi Air Systems LLC | B + C20, C36, C46 | 2021 | Active |
| G Ferrabee Company Incorporated | A + HAZ | 1982 | Renew by Nov 30, 2026 |
| G H Group Inc | B | 1987 | Active |
| G T Power Construction Inc | B + C10 | 2021 | Active |
| G6 Homes LLC | B + C6 | 2016 | Active |
| Gardelle Construction | B + C27 | 1989 | Active |
| Gasca Corp | B | 2025 | Active |
| Gemini Construction Group LLC | B | 2021 | Active |
| Gems Environmental Management Services Inc | A + ASB, C33, HAZ | 2005 | Active |
| GHD Services Inc | A + HAZ | 2005 | Active |
| Ghi Design & Build Inc | B | 2023 | Active |
| Gilbane Federal | A, B + HAZ | 1995 | Active |
| Gilbane Federal JV | B | 2022 | Renew by Nov 30, 2026 |
| Go Green Cleaning & Construction | B | 2026 | Active |
| Goat Construction Services | B | 2026 | Active |
| Golden Heights Roofing | B + C39 | 2020 | Active |
| Grace Construction | B | 2010 | Active |
| Green Air Heating And Air Conditioning Inc | B + C10, C20, C46 | 2008 | Active |
| Green Bay Remodeling Inc | B | 2014 | Active |
| Green Empire Builder Inc | B + C10 | 2022 | Active |
| Green Group Roofing | B + C39 | 2019 | Active |
| Griffin/Swinerton A Joint Venture | B | 2009 | Active |
| Griffin/Swinerton LLC | B | 2018 | Active |
| Ground Level Construction Inc | A, B + C20, HAZ | 2014 | Active |
| Groundlevel-Overaa Joint Venture 2 | A, B + C20, HAZ | 2021 | Active |
| Guerra Bros Plumbing Inc | A + C36, C42 | 2001 | Active |
| GWC Home Remodeling | B | 2001 | Active |
| Halsey Construction LLC | B | 2020 | Active |
| Hannah Construction | B | 2018 | Active |
| Happy Home Repairs Inc | B2 | 2023 | Active |
| Heritage Structures Inc | B | 2019 | Active |
| Herrera General Construction Inc | B | 2020 | Active |
| High Definition Solar Construction | B + C39, C46 | 2010 | Active |
| Hinkson Construction Inc | B | 2014 | Active |
| Home And Design Studio LLC | B | 2026 | Active |
| Home Quality Remodeling Inc | B | 2004 | Active |
| Homexperts Inc | B + C39, C46 | 2019 | Active |
| Huntson Construction | B | 2025 | Active |
| Independent Construction Company | A + C12, HAZ | 1963 | Active |
| Insite Design & Build Inc | B | 2003 | Active |
| Integrit Construction Inc | B | 2019 | Active |
| Ironwood Commercial Builders Inc | B + C9, C33, C35 | 2007 | Active |
| Ivy Home Builders Inc | B | 2025 | Active |
| J & A Whirlow Painting And Renovation | B + C33 | 1997 | Active |
| J & J Dynamic Construction Inc | B | 2020 | Active |
| J C C Inc | A | 2013 | Active |
| J Co Contractors Inc | B | 2026 | Active |
| J J H Construction Services Inc | B | 2024 | Active |
| J O D R Inc | B | 2009 | Active |
| J.I.G General Contractors Inc | B | 2023 | Active |
| Jack's Remodeling Inc | B | 1973 | Active |
| Janus Corporation | A, B + ASB, C2, C21 +2 | 1989 | Active |
| Jin188 Construction | B | 2023 | Active |
| John 316 Construction Inc | B | 2022 | Active |
| JQ Kitchen And Bath | B | 2014 | Active |
| Jr Electric And General Contracting Inc | B + C10 | 2017 | Active |
| JTR Construction Company Inc | B | 1988 | Active |
| K Floors | B + C15 | 2012 | Active |
| K&K Construction | A, B + C10, C27, C36 | 2021 | Active |
| Kaljian Construction Inc | B | 2002 | Active |
| Kitchen And Bath Xpressway | B2 + C15 | 2011 | Active |
| Kiwi Pavers Inc | B + D06 | 2018 | Active |
| KSG Solar Services Inc | B + C10 | 2023 | Active |
| L D Strobel Co Inc | B + C10 | 1991 | Active |
| La Joya Construction Inc | B + C6 | 2010 | Active |
| Lammers Ralph Construction Inc | B | 1993 | Active |
| Lamorinda Inc | B + C54 | 1988 | Active |
| Langhammer Walter Inc | B | 2008 | Renew by Oct 31, 2026 |
| Lawlor Tim Construction | B | 2009 | Active |
| Leegwater Building & Development Inc | B | 1992 | Active |
| Legacy Builders Inc | A, B | 1996 | Active |
| Legacy Framers Inc | B | 2006 | Active |
| Legacy Renovations Inc | B | 2001 | Active |
| Lema Construction Inc | B + C17 | 2013 | Active |
| Lescure Company Inc | A, B + C4, C16, C20 +2 | 1967 | Active |
| Limitless Building Concepts | B + C33 | 2013 | Active |
| LRV Builders Inc | B | 2026 | Active |
| Lusky Construction Inc | B | 2025 | Active |