| 2 MH Construction | B | 2008 | Active |
| 33 Andrade Enterprises Inc | B | 2024 | Active |
| 4 S General Engineering Inc | A | 2013 | Active |
| 5 Star Remodeling Inc | B | 2026 | Active |
| A E Carlson Construction Inc | B | 2002 | Active |
| A J Zimmer Construction Inc | A | 1998 | Active |
| A M C Builder | B | 2010 | Active |
| A Plus Window Sales And Installation | B | 2011 | Active |
| A R Home Builder LLC | B | 2025 | Active |
| A1 Maintenance & Construction Corp | B | 2024 | Active |
| Ace General Contractors Inc | B | 2023 | Active |
| Ace Tier Construction Inc | B | 2026 | Active |
| Advantage Demolition And Grading Inc | A | 1998 | Active |
| Ailm Underground Inc | A | 2025 | Active |
| Aj Custom Construction Inc | B | 2004 | Active |
| Ajm Construction & Repairs | B | 2021 | Active |
| Alcon Colorado Engineering Inc | A | 2002 | Active |
| All Source Construction Inc | B | 2018 | Active |
| Aloha Construction Services Inc | A | 2007 | Active |
| American Restoration And Construction Inc | B | 2014 | Renew by Oct 31, 2026 |
| American West Development | A | 2024 | Active |
| Aqua Bear Plumbing & Drain | A, B | 2021 | Active |
| Arroyos General Engineering | A | 2020 | Renew by Oct 31, 2026 |
| Arshan Construction Company | B | 2021 | Active |
| As DRC | B | 2024 | Active |
| Associated Construction And Engineering Inc | A | 2011 | Active |
| Associated Tank Constructors Inc | A | 2017 | Active |
| Ays Remodeling Inc | B2 | 2026 | Active |
| B21 Construction | B | 2023 | Active |
| B7 Construction Inc | B | 2012 | Active |
| Baily Contracting | B | 2024 | Active |
| Baker J Builders Inc | B | 2017 | Active |
| Bathing Solutions Inc | B | 2025 | Active |
| BD Renovations Inc | B2 | 2025 | Active |
| Beam Management LLC | B | 2022 | Active |
| Bearcat Builders | B | 1983 | Renew by Nov 30, 2026 |
| Bedon Construction Inc | A | 1998 | Active |
| Best Masonry Services Inc | B | 2020 | Active |
| Better Bath | B2 | 2026 | Active |
| Black Knight Termite And Pest Control Inc | B | 2025 | Active |
| Blue Anchor Visions | B | 2026 | Active |
| Blue Horizons Contracting Inc | B | 2026 | Active |
| Blue Pacific Construction | B | 1991 | Active |
| Bmo Build Co LLC | B | 2020 | Active |
| Boehmer Construction Inc | A, B | 2005 | Active |
| Brady Construction Group Inc | B | 2022 | Active |
| Bridgeview Construction Services Inc | A | 2021 | Active |
| Build Royal Inc | B | 2026 | Active |
| Burchett Grading Inc | A | 2007 | Active |
| BW Commercial Builders Inc | B | 2009 | Active |
| C E S | A | 2005 | Active |
| C L Construction Services Inc | B | 2007 | Active |
| C M Corp Facilities Service | A, B | 2010 | Active |
| C M Design & Construction Inc | B | 2001 | Active |
| C&C Contractor Group Inc | B | 2025 | Active |
| Cactus Wren Construction Inc | B | 2025 | Active |
| Cal - Tex Construction Inc | A, B | 2011 | Active |
| California Home Center Inc | B | 2022 | Active |
| Camp Constructors Inc | A, B | 2021 | Active |
| Canyon Springs Enterprises | A | 2002 | Active |
| CD Trenching LLC | A | 2009 | Active |
| Chase Construction Services Inc | B | 2007 | Active |
| Cissell Construction Co Inc | B | 2018 | Active |
| CKM Pipeline Inspection Services | A | 1995 | Active |
| Coastal Building Company | B | 2022 | Active |
| Colonial Engineers Inc | A, B | 2015 | Active |
| Compass Builders Inc | A, B | 2016 | Active |
| Construct & Maintain Corp | A, B | 2003 | Active |
| Construction Crafters Inc | B | 2023 | Active |
| Construction Genetics Inc | B | 2018 | Active |
| Contera Construction Corporation | A, B | 1993 | Active |
| Cook Coatings Inc | B | 1983 | Active |
| Cooney Electric Inc | B | 1993 | Active |
| Cornell Building & Design Inc | B | 2007 | Active |
| Cornell Building Inc | B | 2024 | Active |
| Craft Woodworks Inc | B | 2004 | Renew by Oct 31, 2026 |
| Craftsmen Plumbing Heating & Cooling Inc | B | 1983 | Active |
| Cross & Covenant Construction Inc | A, B | 2020 | Active |
| D K Quality Construction Inc | B | 2001 | Active |
| D M D Innovative Development Inc | B | 2009 | Active |
| D N Builders | B | 2023 | Active |
| Dano Specialties LLC | B | 2019 | Active |
| Davcon Construction Inc | B | 2018 | Active |
| Dave Built Custom Homes Corporation | B | 2023 | Active |
| DBX Inc | A | 1966 | Active |
| Dean's Engineering | A | 1991 | Active |
| Dearmond Construction Inc | B | 1993 | Active |
| Delcko Construction Inc | B | 2016 | Active |
| Details Custom Builders Inc | B | 2021 | Active |
| Devco | A, B | 2023 | Active |
| Devrek Corporation | B | 2004 | Active |
| DKW Contracting & Remodeling | B | 2024 | Renew by Nov 30, 2026 |
| Double D Pipeline Inc | A | 1988 | Active |
| Eastmont Construction LLC | B | 2024 | Active |
| Eh Freeman Engineering And Construction | A | 2026 | Active |
| Elite Door And Window Corp | B | 2022 | Active |
| Elite Impact Enterprise Inc | B2 | 2026 | Active |
| Elka Construction Inc | A, B | 2021 | Active |
| Ellis Building Company LLC | B | 2023 | Active |
| Embershield Systems | B | 2022 | Active |