| Exclusive Construction | B + C21 | 2005 | Active |
| F & A Construction | B | 2010 | Active |
| F & A Construction And Improvements Inc | B | 2018 | Active |
| F 3 Building Services Inc | B + C39 | 2013 | Active |
| F C Paz Enterprises Inc | A | 2001 | Active |
| F H International Service Station Maintenance Inc | A, B + HAZ | 2001 | Active |
| F S S Companies Inc | B + C10, C16, C36 | 2011 | Active |
| Faf Builders Corp | B | 2025 | Active |
| Fencecorp Inc | B + C13 | 2006 | Active |
| Fenceworks LLC | B + C13, C29 | 1974 | Active |
| FFG Construction & Contracting Co | B | 2012 | Active |
| Fiberco General Engineering Contractors Inc | A | 1996 | Renew by Oct 31, 2026 |
| Field View Construction Co Inc | A + C10, C27, C34 +2 | 2020 | Active |
| First Choice Plumbing Heating & Air Conditioning Inc | B + C20, C36 | 1969 | Active |
| First Select Construction Inc | B | 2021 | Active |
| Fitts M Construction Co | B | 2022 | Active |
| Flores Quality Construction | B | 2015 | Active |
| Forever Home Remodeling Inc | B | 2024 | Active |
| Forgepoint Building And Remodeling | B | 2025 | Active |
| Fox Construction | B | 2023 | Active |
| Frazer Kevin Construction Inc | B | 1995 | Active |
| Freedom Construction Builders LLC | B | 2022 | Active |
| Frontier Construction & Interiors | B | 1992 | Active |
| Frontier Framing Inc | B + C5 | 2005 | Active |
| Frontline Construction | B | 2018 | Active |
| Fruciano Development Inc | B + C33 | 2013 | Active |
| Full House Renovations | B | 2020 | Active |
| Full Service Maintenance | B | 1991 | Active |
| Fusion Development | A, B | 2018 | Active |
| G & D Construction | B | 2026 | Active |
| G E D Builders Inc | B | 2010 | Active |
| G&A Innovation Construction | B + C10 | 2020 | Active |
| Gaetta Construction Inc | B | 2014 | Renew by Nov 30, 2026 |
| Gagnier Construction Company Inc | B | 1984 | Active |
| Galvan Construction & Development LLC | B | 2020 | Active |
| Gateway Constructors | A | 2024 | Active |
| GCP Construction Inc | B + D12 | 2020 | Active |
| GD Remodeling Inc | B2 | 2025 | Active |
| General Construction Innovation Inc | B | 2020 | Active |
| George General Contracting Inc | B | 1996 | Active |
| GHC Pipeline LLC | A | 2021 | Active |
| Glariest Maintenance Services LLC | B | 2026 | Active |
| Glenford Construction | B | 2010 | Active |
| Golden Core Construction Inc | B | 2017 | Active |
| Golden Life M&N | B | 2024 | Active |
| Gomez Millennial Builders Co | B | 2025 | Active |
| GPR Construction Inc | B | 2024 | Active |
| Gray Horse Builders Inc | B + C9, C35 | 1981 | Active |
| Green Solution Environmental Services Inc | B | 2018 | Active |
| Griffith Co | B | 2009 | Active |
| GSC Services Inc | B | 2025 | Active |
| Guti Construction | B | 2018 | Active |
| Guyou Construction Inc | B + C10, C20, C39 +1 | 2014 | Active |
| H & E Construction | B | 2025 | Active |
| H T Construction | B | 2013 | Active |
| Hal Hays Construction Inc | A, B + C12, C21, HAZ | 1993 | Active |
| Halo Construction Inc | B | 2013 | Active |
| Harco Group Inc | B | 2004 | Active |
| Hardpro Engineering | A | 2025 | Active |
| Haro's Cabinets Inc | B + C6 | 2007 | Active |
| Harrell Electric | B + C10 | 1983 | Active |
| Harris Jeremy Construction Inc | A | 2008 | Active |
| Havn Collective Inc | B | 2026 | Active |
| Help Your Home California Inc | B | 2018 | Active |
| Herbertson Og Inc | B | 2019 | Active |
| Hernandez And Brunk Construction | B | 1993 | Active |
| Hidden Hills Construction | B | 2020 | Active |
| HM Gold Contractors Inc | B | 2023 | Active |
| Homecraft Constructors | B | 2024 | Active |
| Hometeam Pest Defense Inc | B | 2009 | Active |
| Homeway Construction & Restoration Services Inc | B + C33 | 2020 | Active |
| Hood Robin Construction | B | 2021 | Active |
| HQR Inc | B | 2025 | Active |
| Humlick Enterprises Inc | B + D28 | 2026 | Active |
| I E Restoration Inc | B | 2010 | Active |
| I M C Professional Building Clean Up LLC | B + C21, D06, D63 | 2011 | Active |
| I W I Contracting | B | 2020 | Renew by Nov 30, 2026 |
| Ibarra's General Engineering | A, B + C12, C53 | 1992 | Active |
| Icon Builders Co | B2 + C9 | 2025 | Active |
| Illig Construction Company | B | 1951 | Active |
| Imperial Roofing & Gutters Inc | B + C33, C39, D24 | 2020 | Active |
| Imperium Strategies Group Inc | B | 2026 | Active |
| Infinite Pools | B + C27, C53 | 2005 | Active |
| Infx Works Inc | B | 2026 | Active |
| Inland Constructors And Builders | B | 2007 | Active |
| Inland Contractors Inc | A + ASB, C21, C22 +1 | 2006 | Active |
| Inland Contruction Inc | B | 2005 | Active |
| Inland Empire Architectural Specialties Inc | B + D34 | 1984 | Active |
| Inland Empire Framing Inc | B | 2009 | Active |
| Inland Fixture | B | 2005 | Active |
| Inland Pacific Contractors | B | 1997 | Active |
| Inland Structures Inc | A | 2025 | Active |
| Inland/Dki | B + C15, C33 | 1988 | Active |
| Innov8 Technologies | B + C7, C10 | 2018 | Active |
| Innovative Construction Designs | B | 2020 | Active |
| Integrated Technology Electric Inc | B + C10 | 2012 | Active |
| Interstate Builders Inc | B | 2020 | Active |
| Ironclad General Engineering Inc | A | 2010 | Active |
| Irvine Pipeline Company Inc | A | 1976 | Active |
| Issa Electric Inc | A, B + C10 | 2017 | Active |