| Carter Stones Repair And Remodeling LLC | RGC | 2024 | Active |
| Cartmill Construction LLC | RGC | 2020 | Active |
| Casa Bonita LLC | RGC + LBPR | 2011 | Active |
| Cascade Contracting LLC | RGC + LBPR | 2014 | Active |
| Cascade Craftworks LLC | RGC | 2026 | Active |
| Cascade Custom Renovations LLC | RGC | 2026 | Active |
| Cascade Exteriors LLC | CGC1, RGC + LBPR | 2019 | Active |
| Cascade Flooring Pros Inc | RGC | 2014 | Active |
| Cascade Home Maintenance LLC | RGC | 2025 | Active |
| Cascade Home Solutions LLC | RGC | 2026 | Active |
| Cascade Homes Of Millersburg Inc | RGC | 2016 | Renew by Dec 13, 2026 |
| Cascade Install LLC | CGC2 | 2026 | Active |
| Cascade Paving & Sealcoating LLC | RGC | 2025 | Active |
| Cascade Pro Construction LLC | RGC | 2026 | Active |
| Cascade Projects Co LLC | CGC2, RGC | 2026 | Active |
| Cascade Radon Inc | CGC2, RGC | 2008 | Active |
| Cascade Residential Construction LLC | RGC | 2021 | Active |
| Cascade Solar LLC | CGC2, RGC | 2022 | Active |
| Cascade Stump Removal LLC | RGC | 2026 | Active |
| Cascadia Construction And Design LLC | RGC | 2014 | Active |
| Cascadia Home Performance LLC | RGC + LBPR | 2026 | Active |
| Cascadia Performance Contracting LLC | RGC + LBPR | 2024 | Renew by Dec 22, 2026 |
| Cascadia Rei LLC | RGC + LBPR | 2018 | Active |
| Casey Commercial Construction LLC | CGC1 | 2021 | Active |
| Cass Haus LLC | RGC | 2026 | Active |
| Castle & Co Construction LLC | RGC | 2026 | Active |
| Castle Paint LLC | RGC | 2019 | Active |
| Catalyst Construction & Remodeling LLC | RGC | 2013 | Active |
| Cats Paw Carpentry LLC | RGC | 2026 | Active |
| Caughlans Commercial Floor Covering Inc | CGC2 | 1994 | Active |
| Caverly Construction LLC | RGC | 2026 | Active |
| CD Construction LLC | RGC + LBPR | 2010 | Active |
| Ceco Inc | RGC + CSC2 | 1973 | Active |
| Cedarstone Design & Build LLC | RGC | 2020 | Active |
| Cedartech Roofing Inc | RGC | 2004 | Active |
| Cedric Handyman Services LLC | RGC | 2023 | Active |
| Ceiba Enterprise LLC | RGC | 2026 | Active |
| Centennial Construction LLC | RGC | 2026 | Active |
| Center Line LLC | RGC | 2021 | Active |
| Center Ring Corporation | RGC | 2007 | Active |
| Centerfield Construction LLC | RGC + LBPR | 2023 | Active |
| Centerline Construction & Gutters LLC | RGC | 2023 | Active |
| Centraal Projects LLC | RGC | 2025 | Active |
| Central Bethany Construction LLC | CGC2 | 2004 | Active |
| Central Electronic Alarm Inc | CGC2 + RSC | 1983 | Active |
| Century Electric LLC | CGC2, RGC | 2001 | Active |
| CEO Construction LLC | RGC | 2023 | Active |
| Certain Pro Painting LLC | RGC | 2023 | Active |
| Certified Arborists Portland LLC | RGC | 2011 | Active |
| Ces Investments Inc | RGC | 1987 | Active |
| CG Larner General Contracting Inc | RGC | 1996 | Active |
| CH Murphy Clark Ullman Inc | CGC2 | 1990 | Active |
| Chalet Homes LLC | RGC + LBPR | 2017 | Active |
| Champion Roofing And Construction LLC | RGC | 2026 | Active |
| Changes Construction LLC | RGC | 2025 | Active |
| Changing Spaces Stone & Wood LLC | RGC | 2006 | Active |
| Channel Construction LLC | RGC | 2019 | Active |
| Chantico Home Improvement Company LLC | RGC | 2021 | Active |
| Chantys Painters LLC | RGC + LBPR | 2023 | Active |
| Chapin Custom Works LLC | RGC + LBPR | 2024 | Active |
| Character Builders LLC | RGC + LBPR | 2019 | Active |
| Charles Attarzadeh Construction LLC | RGC + LBPR | 2023 | Active |
| Charnat Corporation | RGC | 2013 | Active |
| Charnat LLC | RGC | 2026 | Active |
| Charter Mechanical Contractors Inc | CGC1, RGC | 2006 | Active |
| Chavez Construction & Flooring LLC | RGC | 2023 | Active |
| Cheng Xin Construction LLC | RGC | 2009 | Active |
| Chernitsky Construction Services LLC | RGC | 2023 | Active |
| Chet Debois Homes Inc | RGC | 1972 | Active |
| Chic Design Investments LLC | RGC | 2008 | Renew by Dec 10, 2026 |
| Chick Of All Trades LLC | CGC2, RGC + LBPR | 2007 | Active |
| Chiino Construction LLC | RGC | 2025 | Active |
| Chill Construction LLC | RGC | 2019 | Active |
| Chim Pro Co | RGC | 2026 | Active |
| Chimney Rescue LLC | RGC | 2017 | Active |
| Choice Homes LLC | RGC | 2024 | Active |
| Chongo Tile And Stone LLC | RGC | 2018 | Active |
| Chris Miller Painting & Construction LLC | RGC | 2017 | Active |
| Christenson Electric Inc | CGC1 + RSC | 1972 | Active |
| Christian A Baldwin Construction LLC | RGC + LBPR | 2016 | Active |
| Christopher McDonald LLC | RGC | 2005 | Active |
| Chroma Maintenance LLC | RGC + LBPR | 2026 | Active |
| Chuck Seaman Construction LLC | RGC | 2005 | Active |
| Chumbley Construction LLC | RGC + LBPR | 2022 | Active |
| Circulation Construction Co | RGC + LBPR | 2019 | Active |
| City Wide Property Maintenance LLC | RGC | 2023 | Active |
| Cityscape Renovation & Restoration LLC | RGC + LBPR | 2022 | Active |
| CJ Lachenmeier LLC | RGC | 2023 | Active |
| CJ Roofing LLC | RGC | 2023 | Active |
| CJMC LLC | RGC | 2023 | Active |
| CK Hoffman Design LLC | RGC + LBPR | 2018 | Active |
| Clandestine Creations LLC | RGC | 2025 | Active |
| Clarke Waste Solutions Holdings Inc | RGC | 2015 | Active |
| Classic Sash & Door Co | RGC + LBPR | 2014 | Renew by Dec 13, 2026 |
| Classy Tile & Flooring LLC | RGC | 2006 | Active |
| Clean A Duct LLC | RGC | 2010 | Active |
| Clean Drop Of Water Inc | RGC | 2023 | Active |
| Clean Edge Painting LLC | CGC2 + LBPR, RSC | 2014 | Active |
| Clean Planet LLC | RGC | 2025 | Active |
| Cleanset LLC | RGC | 2025 | Active |