| Dynamic Kontractors | B | 2023 | Active |
| Dynamic Restoration Pro LLC | B | 2026 | Active |
| E & E Contractors | B | 2011 | Active |
| E P C C Inc | B | 1995 | Active |
| Echo Contracting Inc | B | 2006 | Renew by Dec 31, 2026 |
| Eco & Associates Inc | A, B | 2005 | Active |
| Ecoforce Solutions | B | 2015 | Active |
| Edify Construction Inc | B | 2019 | Active |
| Elias Engineering Construction LLC | A | 2024 | Active |
| Elite Foodservice Development LLC | B | 2019 | Active |
| Empire Building Constructions Inc | B | 2026 | Active |
| Entourage Home Remodeling | B | 2021 | Active |
| Erazo Construction | B | 2022 | Active |
| Erbe Construction Co | B | 2013 | Active |
| Es Engineering Services LLC | A + HAZ | 2016 | Active |
| Exceed Construction Services LLC | B + C6, C10, C15 +1 | 2024 | Active |
| FGR Professional Building Services Inc | B + C33 | 2011 | Active |
| Folding Door Store Inc The | B | 2020 | Active |
| Folsom General Contracting Inc | B | 2006 | Active |
| Foss General Contractors Inc | B + C36 | 2020 | Active |
| Foundation Construction And Renovation LLC | B | 2023 | Active |
| Freedom Restoration | B + C10, C33 | 2022 | Active |
| Frey John S Enterprises | B | 1973 | Active |
| Fuji Engineered Services | A, B | 2018 | Active |
| Fyco Construction | B | 2024 | Active |
| G 2 Construction Inc | A + C8, C60 | 2001 | Active |
| G B A Construction Inc | B | 2021 | Active |
| G C I Site Services Incorporated | B | 2019 | Active |
| G's General Contractor Inc | B | 2025 | Active |
| Gallardo Contractors Inc | B | 2009 | Active |
| Genesis Home Renovations Inc | B | 2024 | Active |
| Genesis Home Repair Inc | B | 2025 | Active |
| Global Innovative Contractors Inc | B | 2021 | Active |
| Gonzalez Elite Builders Inc | B | 2026 | Active |
| Gray WC | B | 2000 | Active |
| Green Flag Flooring And Construction Inc | B + C15 | 2021 | Active |
| Green Planet Restoration O C Inc | B | 2021 | Active |
| Gresco Corporation | B | 1980 | Active |
| GV Construction | B + C15, C33 | 2016 | Active |
| H M Builders Construction Inc | B + C8, C29 | 2023 | Active |
| H P L Mechanical Inc | B + C4, C16, C29 +4 | 1975 | Active |
| Habitat For Humanity Of Orange County Inc | B | 2004 | Active |
| Haki Built Construction | B | 2026 | Active |
| Haus Werks Inc | B + C54 | 2007 | Active |
| Hayes Building Company | B | 2017 | Active |
| Hda Construction | B2 | 2022 | Active |
| Heathcote Properties | A, B | 1992 | Active |
| Hernandez - Marquez Enterprises Inc | B + C8 | 2001 | Active |
| Home Turf | B + C20, D06, D12 | 2008 | Active |
| Honeycutt Construction Management LLC | B | 2020 | Active |
| HWH Construction Inc | B | 2017 | Active |
| I S General Construction | B | 2020 | Active |
| Icon Maintenance Services Inc | B + C10 | 1993 | Active |
| Imagine Beyond Development Inc | B + D29 | 2008 | Active |
| Interior Carpentry Design Inc | B | 2004 | Active |
| Irc Services Inc | B | 1999 | Active |
| Irrigation Pros | B + C27 | 2023 | Active |
| J B P Construction | B | 2024 | Active |
| J C Garcia Custom Building | B | 2018 | Active |
| J C H General Construction Inc | B | 2014 | Active |
| J H Professional Builders Inc | B | 2022 | Active |
| J J Innovators Construction Inc | B | 2017 | Active |
| J S Construction Services Inc | B | 2022 | Active |
| J T Construction Inc | A + C8, C29 | 2004 | Active |
| J W B Construction Services Inc | B | 1994 | Active |
| Jack Ryan Construction | B | 2024 | Active |
| Jamison Engineering Contractors Inc | A | 1999 | Active |
| Jas Enterprise LLC | B | 2001 | Active |
| JB Renovations | B + C33, C36 | 2014 | Active |
| Jehova-Nissi General Building Inc | B | 2017 | Active |
| Jem Remodel & Construction Inc | B | 2016 | Active |
| Jensen Oc Remodeling | B | 2022 | Active |
| JG Finish Carpentry Inc | B | 2020 | Active |
| Jnewton Design & Construction | B | 2023 | Active |
| Just Perfect Renovation & Construction Inc | B | 2017 | Active |
| JVL Construction Inc | B | 2016 | Active |
| KG Axis Inc | B + C10 | 2014 | Active |
| Kiktavi Build Inc | B + C27 | 2017 | Active |
| King Roofing | B + C39 | 1999 | Renew by Dec 31, 2026 |
| Kinsman Builders | B | 2025 | Active |
| Kirby Industries Inc | B + C54 | 1988 | Active |
| Knotty Nuff Wood Inc | B | 2023 | Active |
| Kya Services LLC | A, B + C10, C15, C20 +2 | 2013 | Active |
| L & D Construction Remodel | B | 2026 | Active |
| L & N Builders Pro | B | 2025 | Active |
| L 2 Specialties Inc | B + D34 | 2001 | Active |
| L S R Builders Inc | B | 2011 | Active |
| L&E Construction Group Inc | B | 2020 | Active |
| La Builders Group | B | 2019 | Active |
| La Colina Builders LLC | B | 2026 | Active |
| La Loma Construction | B + C36 | 2024 | Active |
| Legacy Mechanical Group Inc | A + C16, C36 | 2026 | Active |
| LG Roofing | B + C39 | 2022 | Active |
| Liberty Built Inc | B | 2023 | Active |
| Lizbeth Builders Inc | B | 1988 | Active |
| Los Angeles Smart Construction And Installation LLC | B | 2026 | Active |
| LR Construction | B | 2023 | Active |
| LTS Property Services | B + C10, D31 | 1993 | Active |
| LV Home Development Inc | B | 2024 | Renew by Nov 30, 2026 |
| Lyons Gary F And Associates | B | 1973 | Active |