| J D Civil Engineering Inc | A | 2023 | Active |
| J D R Construction | B + C29, C53 | 1994 | Active |
| J G Companies Inc | B + C10 | 1986 | Active |
| J I G Plumbing Inc | B + C20, C36 | 2011 | Active |
| J&E Engineering | A | 2023 | Active |
| J's Pipeline Inc | A + C34 | 1996 | Active |
| Jacuzzi Bath Remodel Of California | B + C36 | 2026 | Active |
| JBM Builders | B | 2023 | Active |
| Jiude Inc | B | 2020 | Active |
| Johnson's General Contracting LLC | B | 2026 | Active |
| Joseph Charles Stone Development | B | 2026 | Active |
| JP Pro Construction Inc | B | 2023 | Active |
| Jumbo Construction Inc | B | 2026 | Active |
| K L P M Inc | B | 2004 | Active |
| Kasa Construction Inc | A, B + C10, C27, C36 | 2009 | Active |
| Kay-D Construction Services | B | 2023 | Active |
| Las Casita Inc | B | 2022 | Renew by Dec 31, 2026 |
| Licon Kenneth General Contractor | B | 2016 | Active |
| Lopez United Inc | B | 2004 | Active |
| Los Altos Termite Inc | B | 2011 | Active |
| M & J Development LLC | B | 2024 | Active |
| M C Contracting | A, B + C10 | 2002 | Renew by Nov 30, 2026 |
| M L Builder | B | 2011 | Active |
| M L Spraybooth & Installation | B + D34 | 2009 | Active |
| Madole L B Company Inc | A | 1985 | Active |
| Malabicky J Corp | B + D40, HAZ | 1986 | Active |
| Marquis Construction Inc | B | 1981 | Active |
| Maymar Builders Inc | B | 2009 | Active |
| Meridian Hardwood Floors Inc | B + C15 | 2018 | Active |
| Metrocell Construction Inc | A, B + C10, HAZ | 2003 | Active |
| Midway Construction Corp | B + C2, C9, C33 | 2013 | Active |
| Mike Davis Construction Inc | B | 2018 | Active |
| Milestone Building Solutions Inc | B + C10, C16, C36 | 2023 | Active |
| Millennial Contractor LLC | B | 2022 | Active |
| MJK Construction Inc | A, B + C8, C10, HAZ | 1990 | Active |
| Mod Design Build | B | 2017 | Active |
| Myers & Sons Hi - Way Safety Inc | A + C31, C32 | 2000 | Active |
| Nartin Construction & Home Improvement | B | 2018 | Active |
| National Sign & Marketing Corporation | B + C10, C45 | 1998 | Active |
| Nationwide Construction | B + C47 | 2023 | Active |
| Newkirk's Backhoe Rental Inc | A | 1999 | Active |
| Newkirk's Excavation Inc | A | 1995 | Active |
| Nextcore Inc | B | 2026 | Active |
| Noelte Construction Services Inc | A, B + C8 | 1965 | Active |
| Oc Home Services Inc | B2 | 2026 | Active |
| Pacific View Commercial Services Inc | B | 2013 | Active |
| Patio Covers By Splash | B + C27 | 2026 | Active |
| Peterson Pipeline Inc | A | 1994 | Active |
| Petro Pros Inc | A + D21, D40, HAZ | 2007 | Renew by Nov 30, 2026 |
| Petroleum Industries | A + HAZ | 2011 | Active |
| PG Contractors Corporation | B + C10 | 2021 | Active |
| Platinum Drywall Corp | B | 2013 | Active |
| Plumbers Hub LLC | B + C36 | 2021 | Active |
| Premier Renovations Inc | B + D12 | 2023 | Active |
| Prestigious Remodels | B | 2023 | Active |
| Procoating Inc | B + C33 | 2015 | Active |
| Promiseland Constructors & Remodeling Inc | B | 2023 | Active |
| Protex Construction | B | 2010 | Active |
| R M A Builders Inc | B | 2025 | Active |
| Red Castle Construction Inc | A, B + C8 | 2023 | Active |
| Revive Construction & Repairs Corp | B | 2024 | Active |
| Ridley Howard Co Inc | A, B + C32, C33, C39 +2 | 1975 | Active |
| Rivera Pro Builders Inc | B | 2026 | Active |
| Rommel Construction Inc | B | 2003 | Active |
| Sarkis Construction Inc | B | 2012 | Active |
| Savant Construction Inc | B + C6 | 1990 | Active |
| Savi Construction Inc | A | 2024 | Active |
| Servpro Of Chino/Chino Hills | B + ASB, D64 | 2009 | Active |
| Smitty's Services | B + D35 | 2009 | Active |
| So Cal Remodeling Products Inc | B + C2, C20, C39 | 2004 | Active |
| So Cal Resurfacing Inc | A | 2017 | Active |
| Splash Pools & Construction Inc | B + C27, C53 | 2000 | Active |
| Stalwart Ventures | B | 2015 | Active |
| Sturgeon Electric California LLC | A + C10, C31 | 2015 | Active |
| Sunwest Engineering Constructors Inc | A, B + HAZ | 1995 | Active |
| Sureteck Industrial & Commercial Services Inc | B + C33, D38, D42 +2 | 2009 | Active |
| Synergy Facility Services Inc | B | 2014 | Active |
| T & T Excavating Inc | A | 2007 | Active |
| Tamang Electric Inc | A + C10 | 1987 | Active |
| Tara Developments Corporation | B | 2025 | Active |
| Team Reliant Inc | A + ASB, C12, C21 +3 | 1993 | Active |
| Team S P L Inc | B + C27, C53 | 2014 | Active |
| The Adu Pro Inc | B | 2024 | Active |
| Transtech Engineers Inc | A, B | 1996 | Active |
| Tri-J Industries Incorporated | B + C33 | 1980 | Active |
| Ultimate Construction Remodelers | B + C10 | 2013 | Active |
| United Fiber Comm Inc | A | 2013 | Active |
| US Restoration | B | 2026 | Active |
| Veterans Communication Services Incorporated | B + C7, C10 | 1997 | Active |
| Visual Information Systems Company | B + C10, C45 | 1983 | Active |
| VMG Remodeling Inc | B + C15 | 2018 | Active |
| Well-Max Construction | B + C10 | 2025 | Active |
| West Inland Builders Inc | A, B | 2025 | Active |
| Wiekamp Construction Inc | B | 2020 | Active |
| Wincon Service Inc | B | 1989 | Active |
| Winkler's Excavating & Grading Inc | A | 2000 | Active |
| WP Electric & Communications Inc | B + C10 | 1985 | Active |
| Yireh Construction Inc | B | 2022 | Active |