| Fast Home Remodeling & Repair | B | 2026 | Active |
| Favreau's Custom Woodworking Inc | B + C6 | 1990 | Active |
| Fernie's General Contractors | B | 2025 | Active |
| Fickle Larry Construction Inc | B + C9 | 1998 | Active |
| Fino Builders Inc | B | 2021 | Active |
| Fitzhauer Construction Inc | B + C10, C20, C39 | 2015 | Active |
| Five Diamonds Building And Remodel Inc | B | 2021 | Active |
| Floform Block Tops LLC | B + C6, C36, C54 +2 | 2024 | Active |
| Flooring Depot Inc | B + C15 | 2016 | Active |
| FM General Engineering Inc | A | 2012 | Active |
| Form Construction | B | 2024 | Active |
| Foxhound Construction | B | 2026 | Active |
| Freedom Industries Commercial Doors And Docks Inc | B + D21, D28 | 2012 | Active |
| Freeman Restoration | B | 1994 | Active |
| Fs3 Inc | B | 2011 | Active |
| G A P Home Improvement & Remodeling | B + C15, C54 | 1992 | Active |
| G E P C - C A LLC | B | 2020 | Active |
| G M A C Construction Inc | B + C33, D12 | 1990 | Active |
| G S Total Concept Inc | B + C33 | 2013 | Active |
| Galicia's General Construction Inc | B | 2026 | Active |
| Gamboa Mark Construction LLC | B + C10, C36 | 2003 | Active |
| Ganahl Lumber Company | B + C6 | 1959 | Active |
| Ganalix General Construction | B | 2022 | Active |
| Gavilan Construction Inc | B | 2026 | Active |
| GJ Doors | B + D28 | 2022 | Renew by Dec 31, 2026 |
| Glass Fixer Inc The | B + C17, D52 | 1998 | Active |
| Golden Eagle Construction | B | 2021 | Active |
| Golden Hand Construction Inc | B + C10 | 2021 | Active |
| Goldeneagle Construction Inc | B + C10 | 2026 | Active |
| Gonzalez Engineering | A, B + C29, C51 | 2022 | Active |
| Good Old Boys Construction Inc | B | 2024 | Renew by Dec 31, 2026 |
| GR Remodeling Inc | B | 2017 | Active |
| Green Home Solutions LLC | B + C39 | 2026 | Active |
| Groc Development LLC | B | 2021 | Active |
| H B A Incorporated | A, B + C8, C21, C29 +3 | 2006 | Active |
| Haaland Builders Inc | B | 1994 | Active |
| Handycrew Services Inc | B + C9, C10, C33 | 2014 | Active |
| Handyman Daddy | B | 2012 | Active |
| Helmer R G Co Inc | B | 1991 | Active |
| Heritage Glass & Hardware LLC | B + C17 | 2018 | Active |
| Hi - Tech Design & Construction | B + C27 | 2005 | Active |
| Hiro Construction | B | 2025 | Active |
| Hoagc | B | 2025 | Active |
| Home Builder Inc | B + C36 | 2018 | Active |
| Homekea LLC | B | 2026 | Active |
| Howard's Construction | B + C10 | 1993 | Active |
| Husky Engineering Inc | A | 2026 | Active |
| Hutton Construction Company | B | 2004 | Active |
| HVAC Install Pros | B + C20 | 2010 | Active |
| I Build Outdoor Inc | B | 2018 | Active |
| I C M Installations Inc | B + D34 | 1995 | Active |
| I M B Plastering & Construction Inc | B + C35 | 2019 | Active |
| Integrated Demolition And Remediation Incorporated | A, B + ASB, C21, C22 +1 | 2015 | Active |
| Iprole Inc | B + C6 | 2000 | Renew by Dec 31, 2026 |
| Irvine Valley Air Conditioning Inc | A + C20, C36 | 1992 | Active |
| J & SJ Contractors Inc | B + C33, C36 | 1993 | Active |
| J D F Construction Inc | B + ASB, C10, C17 +3 | 2011 | Active |
| J F Prime Construction | B | 2019 | Active |
| J R Construction | B + C9 | 2004 | Active |
| J's Master Builders Corp | B | 2018 | Renew by Nov 30, 2026 |
| James Electric Inc | B + C10, C21 | 1992 | Active |
| Jamg Bailon Construction Corp | B | 2025 | Active |
| Jas Construction Inc | B | 1997 | Active |
| JB Bostick LLC | A + C12 | 1977 | Active |
| Jcor Plumbing & General Contractor Anaheim | B + C10, C36 | 2018 | Active |
| JDS Remodeling & Construction Inc | B | 2009 | Active |
| JG & Son Construction | B | 2022 | Active |
| JLRR Construction | B | 2025 | Active |
| Jots HOA Construction Services | B + C8, C13, C29 +1 | 2013 | Active |
| Jport Construction | B | 2024 | Active |
| K & M Construction | B | 2009 | Active |
| K B E C Inc | B + C20 | 2015 | Active |
| K B Kitchens, Floors & Furniture Inc | B | 2008 | Active |
| K L S Building Corporation | B | 2009 | Active |
| K R Commercial Interiors Inc | B | 1988 | Active |
| K&A Homes Construction | B | 2025 | Active |
| Kairos Electric And Construction | B | 2025 | Active |
| Kaiser Foundation Health Plan Inc | B | 1979 | Active |
| Kap Equipment Inc | A, B | 1999 | Active |
| Karaki WSC | A, B | 1996 | Active |
| Karcher Environmental Inc | B + ASB, C21, C22 +1 | 1985 | Active |
| Kedin L Construction Inc | B + C10 | 2021 | Active |
| Keenan Hopkins Suder & Stowell Contractors Inc | B + C9, C35, D50 +1 | 1997 | Active |
| Kennedy Bruce Inc | B + C33 | 1992 | Active |
| Keystone Builders Inc | B | 2010 | Active |
| Kitchen And Bath Design Center Inc | B | 2020 | Renew by Nov 30, 2026 |
| Kitchen Bathrooms Remodeling Inc | B | 2019 | Active |
| Kitchen Cabinets And Beyond Inc | B | 2007 | Active |
| KJ Construction & Design | B | 2023 | Active |
| Koala Design & Build LLC | B | 2020 | Active |
| Kore Construction | B + C10, C36, C39 | 2021 | Active |
| KPC Construction | B | 2025 | Active |
| L F M Construction Inc | B | 2004 | Active |
| L U Electric Inc | B + C10 | 1990 | Active |
| Lamarc Prime Builders Inc | B | 2025 | Active |
| Larry's Glass & General Contracting Inc | B + C17 | 1995 | Active |
| Laslo Construction And Design LLC | B | 2024 | Renew by Dec 31, 2026 |
| LCB General Construction Services LLC | B | 2026 | Active |
| Legacy One Builders | B | 2020 | Active |
| Legendary Calrep Windows And Doors | B + C17 | 2015 | Active |