| 1st Alert | A, B + HAZ | 1989 | Active |
| 1st Choice Builders Group Inc | B | 2012 | Active |
| 360 Construction Group Inc | B | 2009 | Active |
| 3m Construction Corporation | A, B + C33 | 2022 | Renew by Dec 31, 2026 |
| A & A's Construction Inc | B | 2025 | Active |
| A G Plumbing & Building Contractors Inc | B + C36 | 2009 | Active |
| A J Construction Specialties Inc | B | 1990 | Active |
| A New View Windows & Doors Inc | B | 2001 | Active |
| A Plus Contracting Inc | B + C17 | 1988 | Active |
| A R E Property Development | B + C17, C46, D28 | 2009 | Active |
| A T Dabasinskas Co LLC | B | 2026 | Active |
| A V Apex Construction Inc | B | 2016 | Active |
| A&D Masri Inc | B | 2023 | Active |
| A-1 Fence | B + C13, C23 | 2016 | Active |
| A-1 Painting Concepts Inc | B + C33 | 1999 | Active |
| A-Z Property Services | B | 2015 | Active |
| A2z Developers Inc | B | 2025 | Active |
| Aaa Demolition Inc | A + ASB, C21, HAZ | 1999 | Active |
| Aaron Alt Construction Inc | B + C10 | 2016 | Active |
| Aaron J Mitchell Inc | B | 2006 | Active |
| Acc & Engineering LLC | A, B + C10, C20, C36 | 2021 | Active |
| Accion Electric Inc | B + C10 | 2017 | Active |
| Accubuild Oc | B | 2023 | Active |
| Accurate Industrial Construction Inc | B + C36 | 2006 | Active |
| Ace Low Voltage | A + C7 | 2019 | Active |
| Adame Communications Inc | A + C7 | 2022 | Active |
| Adep Precision Contracting | B + C21, C22, HAZ | 1995 | Active |
| Advanced Aquatic Technology Inc | B | 1992 | Active |
| Advanced Improvements Inc | B + C10, C20, C36 +1 | 2010 | Active |
| Advanced Medical Builders Inc | B | 2003 | Active |
| Aea Construction & Remodeling LLC | B | 2026 | Active |
| Aegis Builders Inc | A, B | 2005 | Active |
| Aegis Construction Group Inc | B + C10 | 2019 | Active |
| Afcon Development Inc | B | 2023 | Active |
| Ag Construction And Contracting Inc | B | 2000 | Active |
| Ai Home Inc | B | 2020 | Active |
| Air Concepts | B + C20, C36 | 1988 | Active |
| Air Flow Control Air JV | A, B + C2, C10, C20 +2 | 2019 | Active |
| All About Construction | B | 2019 | Active |
| All County Environmental & Restoration Inc | B + ASB, C22 | 2002 | Active |
| Allied Industrial Systems Inc | B + C10 | 1989 | Active |
| Allied Sprinkler Company Inc | A + C27 | 1972 | Active |
| Allred's Corporation | B | 2019 | Active |
| Alpha Energy Group Inc | B + C10, C20, C36 | 2010 | Renew by Dec 31, 2026 |
| Alpha Enviro Tech Inc | B + C20, C39 | 2017 | Active |
| Amar Property Services Inc | B | 2021 | Active |
| Ambient Environmental Inc | A | 2014 | Active |
| Amended Spaces Inc | B + C8 | 2022 | Active |
| American Best Remodeling Inc | B | 2023 | Active |
| American International Engineering (Aie) | A, B + C36 | 2024 | Active |
| Americo Builders LLC | B | 2019 | Active |
| Amko Contractors Inc | B + C20 | 2018 | Active |
| Anaheim Hills Tile Supply | B + C54 | 2012 | Active |
| Anchored Inc | B | 2018 | Active |
| Andrews Contracting Inc | B | 1993 | Active |
| Andromeda Construction Inc | B | 2025 | Active |
| Anointekus Inc | B + C10 | 2022 | Active |
| Ap Building Maintenance Inc | B + C10, C33 | 2019 | Active |
| Ap Construction | B + C54 | 2024 | Active |
| Apex Construction SD LLC | B | 2026 | Active |
| Apex Studio & Build | B | 2025 | Active |
| Approved Property Services | B | 2022 | Active |
| Ark Engineering Contractors Inc | A, B + C33 | 2017 | Active |
| Arnaz Engineering Contractors Inc | A, B | 1998 | Active |
| Arteaga's General Construction Corp | B | 2026 | Active |
| Arza Builders Inc | B | 2026 | Active |
| Ascension Termite Pest Control Construction Inc | B | 2023 | Active |
| Assembly Renovations Inc | B | 2025 | Active |
| Assurepro Water Damage Restoration Corp | B | 2023 | Active |
| Astra Builders Inc | A, B + C10 | 2002 | Active |
| At1 G Construction And Restorations | B | 2024 | Active |
| Ati | B + ASB, C2, C6 +7 | 2021 | Active |
| Ati Restoration Spring Valley Ca Inc | B + ASB, C2, C6 +4 | 1991 | Active |
| Axis Mechanical Services | B + C16, C36, D21 | 2008 | Active |
| Ayala Engineering Inc | A | 2011 | Active |
| Aymco Construction Inc | B | 2011 | Active |
| B & B Emergency & Restoration | B + C15, C39 | 2000 | Active |
| B & W LLC | B | 2017 | Active |
| Bayrich Construction Inc | B + C53 | 1982 | Active |
| BCT Builders LLC | B | 2021 | Active |
| Best Interiors Inc | B + C2, C9, C35 | 1987 | Active |
| Bizal Hoff Co | B + C2, C9 | 1966 | Renew by Nov 30, 2026 |
| BJM General Contractor Co | B | 2026 | Active |
| Bless Home Remodeling Inc | B + C2, C39 | 2023 | Active |
| BMW Builders | B + C2, C15, C17 +4 | 1990 | Active |
| BNF Construction Inc | A, B | 2021 | Active |
| Bogali Construction Inc | B | 2017 | Renew by Dec 31, 2026 |
| Bourke Construction Inc | B | 1996 | Active |
| Bralla General Engineering Inc | A | 2026 | Active |
| Brandex Corp | B + C45 | 2013 | Active |
| Bravo Sign & Design Inc | A + D42 | 1992 | Active |
| Brownco Construction Company Inc | A, B + C8, C16, C21 +4 | 1999 | Active |
| Brownco Renewable Contracting Inc | B | 2024 | Active |
| Build By Design Construction | B | 2022 | Active |
| BVM Inc | B | 2023 | Active |
| C A T Builders | B | 2020 | Active |
| C C & E Companies | B | 2015 | Active |
| Ca Kitchens Floors & Baths Inc | B | 2017 | Active |
| Cabinet Wholesalers Inc | B + C6 | 2009 | Active |
| Caisteal Builders Inc | B | 2001 | Active |