| China Creek Construction LLC | CGC2, RGC | 2019 | Active |
| Chira Construction Inc | RGC | 2006 | Active |
| Chom General Construction LLC | RGC | 2018 | Active |
| Chris King Enterprises LLC | CGC2, RGC | 2004 | Active |
| Chris Thomas Construction LLC | RGC | 2019 | Active |
| CHS Services Inc | RGC | 2001 | Active |
| Ciscos General Contractor LLC | RGC | 2013 | Active |
| Cisneros Exterior LLC | CGC2, RGC | 2022 | Active |
| Civil West Construction LLC | CGC2, RGC | 2021 | Active |
| CJ El Creador LLC | RGC | 2019 | Active |
| CJ Hansen Co Inc | CGC2, RGC | 1972 | Active |
| CJHB Corporation | RGC | 2014 | Active |
| Clark Exteriors LLC | RGC | 2026 | Active |
| Classic Tile And Marble Inc | RGC | 1994 | Active |
| Clearpath Restoration & Construction LLC | RGC | 2026 | Active |
| Clearsky Restoration LLC | RGC | 2026 | Active |
| Clearview Glass & Remodel LLC | RGC | 2021 | Active |
| Climate Control Solutions Hvacr LLC | CGC1, RGC | 2024 | Active |
| Clutch Industries Inc | CGC2, RGC | 2016 | Active |
| CM Paving LLC | RGC | 2024 | Active |
| CMC Construction LLC | RGC | 2019 | Active |
| CN Contractors LLC | RGC | 2019 | Active |
| CND Homes LLC | RGC | 2020 | Renew by Nov 30, 2026 |
| Cnu Property Solutions LLC | RGC | 2021 | Active |
| Co2 Monitoring LLC | CGC2 | 2022 | Renew by Nov 22, 2026 |
| Coachella Construction LLC | RGC | 2022 | Active |
| Coast To Coast Remodelers LLC | RGC | 2016 | Active |
| Cobco Cabinets LLC | RGC | 2023 | Active |
| Coho Contracting LLC | RGC | 2023 | Active |
| Coho Renovations LLC | RGC | 2022 | Active |
| Coleman Contracting & Home Services LLC | RGC | 2026 | Active |
| Colomo Construction LLC | RGC | 2025 | Active |
| Colson & Colson General Contractor Inc | CGC2, RGC | 1991 | Active |
| Colungas Framing LLC | CGC2, RGC | 2019 | Active |
| Comfort Homes LLC | RGC | 2002 | Active |
| Common Sense Solar & Heat Pumps LLC | RGC | 2026 | Active |
| Con Tech Inc | RGC | 2014 | Active |
| Confera Construction Services LLC | CGC2 | 2023 | Active |
| Conkraft Construction Inc | RGC | 2006 | Active |
| Connections Electric Group Inc | RGC | 2023 | Active |
| Connections Heritage Inc | RGC | 1990 | Active |
| Contract Interiors LLC | CGC2, RGC | 1999 | Active |
| Convergence Kitchen & Bath Inc | RGC | 2026 | Active |
| Copperhead Roofing & Construction LLC | RGC | 2021 | Active |
| Coral Roofing Inc | RGC | 2019 | Active |
| Corbin Michael Construction LLC | CGC2, RGC | 2021 | Active |
| Core Builders Group NW LLC | RGC | 2026 | Active |
| Core Electric LLC | RGC | 2024 | Renew by Dec 12, 2026 |
| Cornerstone Commercial Builders Corp | CGC1 | 2025 | Active |
| Cornerstone Construction And Design LLC | RGC | 2024 | Active |
| Cornfed Construction Inc | RGC | 2009 | Active |
| Corp Inc | CGC2 | 1997 | Active |
| Cortes All Around Trees LLC | RGC | 2022 | Active |
| Cover Up Corporation | RGC | 2018 | Active |
| Cox Electric Inc | CGC1, RGC | 2015 | Active |
| CR Floor Covering LLC | RGC | 2026 | Active |
| Craft And Key Renovation And Repair LLC | RGC | 2025 | Active |
| Crawford Paint & Repair LLC | RGC | 2025 | Active |
| Crib Top Roofing LLC | RGC | 2021 | Active |
| Crystal Diamond Construction LLC | RGC | 2022 | Active |
| CS Home Improvements LLC | RGC | 2026 | Active |
| CSR Fab LLC | RGC | 2023 | Active |
| CT Pro Painting LLC | RGC | 2020 | Active |
| Cuellart Painting LLC | RGC | 2020 | Active |
| Curb Appeal By Francisco LLC | RGC | 2018 | Active |
| Curtis Manufacturing And Construction LLC | RGC | 2021 | Active |
| Custom Comfort Heating And Air Conditioning LLC | RGC | 2016 | Active |
| Custom Kitchen Cabinets LLC | RGC | 2016 | Active |
| CV Construction LLC | RGC | 2017 | Active |
| CWC Dynamic Builds LLC | RGC | 2026 | Active |
| Cypress Homes LLC | RGC | 2014 | Active |
| D & D Satellite Inc | RGC | 1992 | Active |
| D & M Quality Construction LLC | RGC | 2021 | Active |
| D O S Framing LLC | RGC | 2018 | Active |
| Dairy Cooling & Mechanical Inc | CGC2 | 2009 | Active |
| Dakota Construction Services Inc | CGC2 | 2016 | Active |
| Dales Homes Inc | RGC | 2017 | Active |
| Dales Remodeling Inc | RGC | 2011 | Active |
| Dalke Construction Co Inc | CGC2, RGC | 1990 | Active |
| Dalke Excavation LLC | RGC | 2011 | Active |
| Dane Pumps & Equipment LLC | RGC | 2018 | Renew by Dec 13, 2026 |
| Daniel L Quanbeck LLC | RGC | 2001 | Active |
| Dar Construction LLC | RGC | 2017 | Active |
| Dar USA Construction LLC | CGC2 | 2018 | Active |
| Darin Ferder Construction LLC | RGC | 2011 | Active |
| David H Construction LLC | RGC | 2022 | Active |
| David Kerns Construction Inc | RGC | 2003 | Active |
| Davidson Contracting LLC | RGC | 2011 | Active |
| Davidson Remodeling LLC | RGC | 2024 | Active |
| Davidsons Masonry Inc | CGC2, RGC | 1983 | Active |
| Day Energy Solutions LLC | RGC | 2013 | Active |
| Day Heating Co | CGC2, RGC | 1972 | Active |
| DC Remodeling And Home Repair LLC | RGC | 2026 | Active |
| Dcorona Construction LLC | RGC | 2024 | Active |
| DCR Construction LLC | RGC | 2026 | Active |
| De La Rosa Painting & Remodeling LLC | RGC | 2020 | Active |
| Defyne Concrete Solutions LLC | RGC | 2019 | Active |
| Dek Enterprises Inc | CGC2, RGC | 1978 | Active |
| Delgados Construction Inc | RGC | 2016 | Active |
| Deluxe Flooring LLC | RGC | 2026 | Active |