| Blue Horizon Construction Corporation | B | 2016 | Active |
| Blue Line Construction Inc | B | 2017 | Active |
| Blue Project Property Solution | B + C33 | 2025 | Active |
| Blue Rebel Construction Inc | B + C53 | 2025 | Active |
| Blue Vibe Remodeling Inc | B | 2026 | Active |
| Blue Waves Restoration Inc | B | 2025 | Active |
| Blusky Elevator And Equipment Co LLC | B + C11, D21, D28 | 2023 | Active |
| BM Elite Builders LLC | B | 2026 | Active |
| Bon Air Incorporated | B + C20 | 1986 | Active |
| Bonin Industries LLC | B | 2018 | Active |
| Bonvue Company | B + C33 | 2000 | Active |
| Boomgaarden Rike Building And Design Solutions Inc | B | 2021 | Active |
| Borrego Construction Co | B | 2026 | Active |
| Borstein Enterprises | B | 1980 | Renew by Dec 31, 2026 |
| Botanica Landscape Inc | B + C27 | 1995 | Active |
| Boulanger Guy Construction Company Inc | B | 2007 | Active |
| Boyd Contracting Incorporated | B | 2003 | Active |
| Brad Folb Contractors & Developers Inc | B | 1997 | Active |
| Bradley Custom Carpentry Inc | B | 2003 | Active |
| Braemar Construction Co The | B | 2001 | Active |
| Branover Contractors Inc | B + C10 | 1985 | Active |
| Brauner Construction & Realty | B | 2019 | Active |
| Brave Builders | B | 2025 | Active |
| Braxton Built Inc | B | 2025 | Active |
| Breakform Construction Inc | B | 2022 | Active |
| Bresson Inc | B | 2013 | Active |
| Brews Roy Construction Inc | B | 2020 | Renew by Nov 30, 2026 |
| Bridge Remodeling Inc | B | 2026 | Active |
| Brite Construction & Builders Inc | B | 2008 | Active |
| Broce Developments | A, B | 2018 | Active |
| Brock Development Corporation | B | 1985 | Active |
| Broskin Construction Corporation | B | 2014 | Active |
| Broxton Inc | A, B | 2026 | Active |
| Buckley Industries Inc | B | 1983 | Active |
| Build And Decor Construction | B + C33 | 2023 | Active |
| Build Block Development Inc | B | 2023 | Active |
| Build Construction Corporation | B | 2024 | Active |
| Build Plus | B | 2025 | Active |
| Build Solutions | B | 2018 | Active |
| Build Space General Construction Inc | B + C10 | 2019 | Active |
| Build Strong | B | 2018 | Active |
| Build Strong LLC | B | 2026 | Active |
| Build Zone Corp | B | 2022 | Active |
| Buildco | B | 2010 | Active |
| Builder 20 Inc | B + C10 | 2017 | Active |
| Builder Man Construction Inc | B | 2025 | Active |
| Builders | B | 2019 | Active |
| Builders & Son's Inc | B | 2011 | Active |
| Builders Elite Team Inc | B | 2017 | Active |
| Builders Modular Depot Inc | A, B + C51 | 2025 | Active |
| Building Blox Inc | B | 2016 | Active |
| Building Connection Inc | B + C10 | 2022 | Active |
| Building Construction Systems LLC | B | 2025 | Active |
| Building Doctors | B + C20 | 2009 | Active |
| Building Inc Construction | B | 2008 | Active |
| Building Solutions And Design | B | 2009 | Active |
| Buildla | B + C10, C36 | 2007 | Active |
| Buildmasters Inc | B | 1990 | Active |
| Buildoly Inc | B | 2025 | Active |
| Buildx Solutions Inc | B + C39 | 2026 | Active |
| Built - Rite Construction Inc | B + C39 | 1991 | Active |
| Built By Design Renovations | B | 2023 | Active |
| Built Ca Inc | B | 2023 | Active |
| Built Dev Construction Corp | B | 2025 | Active |
| Built Inc | B | 2010 | Renew by Dec 31, 2026 |
| Builtadu | B + C47 | 2014 | Renew by Dec 31, 2026 |
| Builtech Group Inc | B | 2013 | Active |
| Burch And Co Projects Inc | B | 1984 | Active |
| Burgos Construction Inc | B | 2024 | Active |
| Butel Construction Inc | B | 2005 | Active |
| By Roger Perron Inc | B | 1982 | Active |
| Bykoff Construction Company | B | 2000 | Active |
| C & A Home Construction Services Inc | B | 2017 | Active |
| C & H Construction Corp | B | 2026 | Active |
| C & R Construction La | B | 2022 | Active |
| C - 1 Construction Corporation | A, B + C21 | 2006 | Active |
| C A Best Construction Inc | B | 2018 | Active |
| C A C Design Development Inc | B | 2019 | Active |
| C C Construction Co Inc | A, B + C10 | 2007 | Active |
| C D P Construction | B | 2020 | Active |
| C E I Building Services | B | 1976 | Active |
| C F F Construction Corp | B + C33 | 1990 | Active |
| C G S Home Improvement Inc | B | 2018 | Active |
| C J W J Construction Corp | B | 2012 | Active |
| C L G Construction Inc | B | 2012 | Active |
| C P C Management | B | 1995 | Active |
| C P M C Inc | B | 2019 | Active |
| C T West Construction Inc | A, B + C10 | 2012 | Active |
| C&I Services LLC | B | 2026 | Active |
| C2pm | A | 2011 | Active |
| C3 Restoration Services LLC | B | 2019 | Active |
| Ca Builders US Inc | B + C39 | 2024 | Active |
| Cabinet Refresh | B + C15, C33, D12 | 1999 | Active |
| Cabmat Design Build LLC | B | 2023 | Active |
| Caf Construction LLC | B + C36 | 2017 | Active |
| Cal - Quake Construction Inc | B | 1999 | Active |
| Cal Con Steel Inc | A, B + C51 | 2019 | Active |
| Cal Future Construction Inc | B | 2019 | Active |
| Calasia Construction Inc | B | 2009 | Active |
| Calcon Construction Inc | B | 1999 | Active |