| 17 Paradigm Inc | A, B | 2021 | Active |
| 4 Seasons Builder | B | 2018 | Active |
| 5th Generation Construction | B | 2016 | Active |
| A H R Company | B + C39 | 2006 | Active |
| A M G Construction Inc | B | 2020 | Active |
| A T Vardi Incorporated | B + C10, C13, C15 +2 | 2002 | Active |
| A W S Construction Services Inc | B + ASB, C21, C22 +1 | 1988 | Active |
| A W Services Inc | B + C10 | 2000 | Active |
| A-1 Construction Building Services Inc | B + C36 | 2022 | Active |
| Ace Cutting Inc | A | 1988 | Active |
| Action Services | B + C36 | 1998 | Renew by Nov 30, 2026 |
| Adb Enterprise | A, B | 2021 | Active |
| Adu Building Company | B | 2022 | Renew by Nov 30, 2026 |
| Adu Construction Contracting | B | 2018 | Active |
| Ag Renovations Inc | B | 2024 | Active |
| Alacrity Development | B | 2023 | Active |
| Alain Hirsch Construction Corp | B | 1998 | Active |
| Alfaro Builders Inc | B | 2016 | Active |
| All Beam Construction Inc | B | 2024 | Active |
| All Tight Inc | B | 1990 | Active |
| Allstar Construction Design Inc | B | 2003 | Renew by Nov 30, 2026 |
| Alpha 1 Construction Inc | B | 2023 | Active |
| American Builders Group Inc | B | 2002 | Active |
| American Integrated Services Inc | A, B + C10, C21, C22 +2 | 1998 | Active |
| Amk Construction Inc | B | 2022 | Active |
| Angel Construction Services Inc | B | 2021 | Active |
| Arkitan LLC | B | 2026 | Active |
| Arriola Pacific Inc | B | 2005 | Active |
| Avalon Construction Services | B | 2021 | Active |
| B B Custom Design Inc | B + D06 | 2010 | Active |
| Balayen Builders Inc | B | 2026 | Active |
| Bancap Investment Group | B | 2006 | Renew by Nov 30, 2026 |
| Bandt's Construction Inc | B | 2008 | Active |
| Baum Construction & Development Inc | B | 2015 | Active |
| Baumel Brothers Electrical Inc | B + C10 | 1995 | Active |
| Bazco Builders Inc | B | 2001 | Active |
| Beach City Contractors Group Inc | A, B + C10, C38 | 1960 | Active |
| Belmont Property Construction Services | B | 2016 | Active |
| Benalmadena Contractors Corporation | B | 2023 | Active |
| Beneflipper Construction Corp | B | 2020 | Active |
| Betancourt Builders LLC | B | 2024 | Renew by Nov 30, 2026 |
| Beto Construction | B | 2019 | Active |
| Biogas Engineering | A | 2016 | Active |
| Bjam Construction Inc | B | 2024 | Active |
| Bless It Construction Inc | B | 2019 | Active |
| Blue Lion Construction And Maintenance Inc | B | 2021 | Active |
| Boer Backhoe Inc | A | 1991 | Active |
| Bragg Investment Company Inc | A + C10, C51 | 1987 | Active |
| Brascia Builders Inc | B | 2005 | Active |
| Bremco Construction Inc | B + C8 | 1976 | Active |
| Brown Courtney And Associate | B + C10, C36 | 2011 | Active |
| Build And Modify Construction | B | 2026 | Active |
| Builder Boy Inc | B + C27, C33, C35 | 2013 | Active |
| Building Service & Improvements | B | 2022 | Active |
| Buildsmart Inc | B | 2012 | Active |
| Builtall | B + C27, C33, D03 | 2000 | Active |
| C And S General Contractor | B | 2021 | Active |
| C D J Builders Inc | B | 2023 | Active |
| C D N & Associates Inc | B | 2004 | Active |
| C E S N Construction Inc | A, B + C46 | 1995 | Active |
| C J P Development Inc | B | 2014 | Renew by Nov 30, 2026 |
| C L B Plumbing Inc | B + C36 | 1997 | Active |
| C R M Construction Incorporated | B + HAZ | 1975 | Active |
| C&M Home Revival | B | 2024 | Active |
| California Balcony Pros | B | 2025 | Active |
| California Construction & Remodeling Inc | B + C33 | 2024 | Active |
| California Drilling & Shoring Inc | B | 2021 | Active |
| California Star Construction Inc | B | 2023 | Active |
| Calimprovement Inc | B | 2025 | Active |
| Carine Inc | B | 2026 | Active |
| Carty General Contracting | B | 1981 | Active |
| Castillo's Construction Builders | B | 2026 | Active |
| Castleberry Home Improvements Inc | B + C46 | 2011 | Active |
| Certified Construction & H V A C Services Inc | B + C20 | 1994 | Active |
| CFS Millwork & Installation | B + C6 | 2023 | Active |
| Charter Group Construction Inc | B | 1990 | Active |
| Check M8 General Construction Inc | B | 2025 | Active |
| Claro Construction Services Inc | B | 2025 | Active |
| Clay Custom Buliders Inc | B | 2026 | Active |
| Clear View Builders LLC | B | 2007 | Active |
| Coast Building & Renovation Inc | B | 2016 | Active |
| Coastal Construction Services | B + ASB, C22 | 1995 | Active |
| Coastal Innovative Builders Group Inc | B | 2023 | Active |
| Coastal Vista Remodeling Co | B | 2016 | Active |
| Cob Construction | B | 2025 | Active |
| Comstock Crosser & Associates Development Company Inc | B | 1996 | Active |
| Comstruct Inc | B + C10 | 1992 | Active |
| Concrete Cutting International | A, B + D06, HAZ | 1999 | Active |
| Connolly-Pacific Co | A | 1982 | Active |
| Conservation Corps Of Long Beach | B | 2019 | Active |
| Constra Inc | B | 1987 | Active |
| Contractors Engineering Inc | A | 2013 | Active |
| Corley Construction | B | 2022 | Active |
| Cornerstone Technologies Inc | A + C46, HAZ | 1998 | Active |
| Cowelco | B + C51 | 1951 | Active |
| Crosby & Overton Inc | A + ASB, HAZ | 1983 | Active |
| Cti Environmental Inc | A + HAZ | 2009 | Active |
| Curtin Maritime Corp | A | 2012 | Active |
| CW Industries Inc | A + C51, C60, D21 | 1999 | Active |
| D V B E Mechanical Inc | B + C4, C16, C20 +4 | 2016 | Active |