| C-Home Design LLC | CC-01 | 2018 | Active |
| Cain Built Co | CC-01 | 2023 | Active |
| Calm Sea's Construction LLC | CC-01 | 2026 | Active |
| Canyon Creek Building LLC | CC-01 | 2018 | Active |
| Cardenas Cncrt & Construction | CC-01 | 2023 | Active |
| Carlson Steelworks Inc | CC-01 | 1999 | Active |
| Carrillos Contractor LLC | CC-01 | 2024 | Active |
| Carroll Carpentry LLC | CC-01 | 2022 | Active |
| Casady's | CC-01 | 2025 | Active |
| Casali Remodeling LLC | CC-01 | 2016 | Active |
| Cascade Builders LLC | CC-01 | 2026 | Active |
| Cascade Joinery Inc, The | CC-01 | 1990 | Active |
| Cascade Lawn Care | CC-01 | 2020 | Active |
| Cascade Mitigation | CC-01 | 2024 | Renew by Dec 19, 2026 |
| Cascadia Energy Solutions LLC | CC-01 | 2021 | Active |
| Cascadia Homes | CC-01 | 2020 | Active |
| Cascadia Renewables LLC | CC-01 | 2026 | Active |
| Catkin Tree Services LLC | CC-01 | 2025 | Active |
| Caz Construction | CC-01 | 2020 | Active |
| Cdi Custom Design Inc | CC-01 | 2003 | Active |
| Cedar Sound Carpentry | CC-01 | 2022 | Active |
| Centerline Contracting LLC | CC-01 | 2026 | Active |
| Champlain Custom Build LLC | CC-01 | 2019 | Active |
| Chimney Butler | CC-01 | 2025 | Active |
| Christopher Homes Inc | CC-01 | 2008 | Active |
| Chuck's Do-It-All Service LLC | CC-01 | 2010 | Active |
| Chuckanut Builders LLC | CC-01 | 2010 | Active |
| Cima Construction Inc | CC-01 | 2017 | Active |
| Circo LLC | CC-01 | 2024 | Active |
| Clean Air Comfort Systems | CC-01 | 2015 | Active |
| Clear Water Services | CC-01 | 2023 | Active |
| Climate Ready Home Srvcs LLC | CC-01 | 2026 | Active |
| Coastline Equipment Inc | CC-01 | 1988 | Active |
| Cobuilt Inc | CC-01 | 2021 | Active |
| Colima Drywall LLC | CC-01 | 2025 | Active |
| Com Steel L L C | CC-01 | 1995 | Active |
| Comfort Zone HVAC | CC-01 | 2026 | Active |
| Common Cents Remodeling LLC | CC-01 | 2010 | Active |
| Confluence Building Co | CC-01 | 2023 | Active |
| Construction By Champion LLC | CC-01 | 2008 | Active |
| Construction Northwest LLC | CC-01 | 2016 | Active |
| Cool Runnings Construction LLC | CC-01 | 2014 | Active |
| Cordova Construction LLC | CC-01 | 2017 | Active |
| Cowden Gravel & Ready Mix | CC-01 | 2008 | Active |
| Creative Const & Remodel Inc | CC-01 | 1998 | Active |
| Creative Craftsman LLC | CC-01 | 2021 | Active |
| Creative Dvsngs Fxng&Rvmp LLC | CC-01 | 2025 | Active |
| Cubboard | CC-01 | 2025 | Active |
| Cummins Excavation | CC-01 | 2026 | Active |
| Custom Concrete Cntrg Inc | CC-01 | 2009 | Active |
| Custom Design & Const Inc | CC-01 | 2007 | Active |
| Custom Home Construction LLC | CC-01 | 2007 | Active |
| Cutting Edge Digital Artst LLC | CC-01 | 2020 | Active |
| D & R Services Const Inc | CC-01 | 2013 | Active |
| D M S Construction LLC | CC-01 | 2020 | Active |
| David Horst Design/Build LLC | CC-01 | 2004 | Active |
| Dawson Construction LLC | CC-01 | 2016 | Active |
| Dawson Marine LLC | CC-01 | 2025 | Active |
| Daz Construction LLC | CC-01 | 2022 | Renew by Dec 7, 2026 |
| Dci Builders LLC | CC-01 | 2019 | Active |
| De-Construction Services LLC | CC-01 | 2013 | Active |
| Deco Painting & Design | CC-01 | 2023 | Active |
| Devine Countertops LLC | CC-01 | 2014 | Active |
| Dewaard & Bode | CC-01 | 2026 | Active |
| Dexperts | CC-01 | 2002 | Active |
| Dirt Works Bellingham Inc | CC-01 | 2007 | Active |
| Dirterra Excavation | CC-01 | 2023 | Active |
| Divine View GT LLC | CC-01 | 2024 | Active |
| DNS Construction LLC | CC-01 | 2022 | Active |
| Double J S Construction LLC | CC-01 | 2016 | Active |
| Doyle Custom Building LLC | CC-01 | 2025 | Active |
| E North LLC | CC-01 | 2021 | Active |
| Earth Arrngmnts Lndsc & DSGN | CC-01 | 2017 | Active |
| Earth First Lawn Care | CC-01 | 2011 | Active |
| Earthworks Tree Service LLC | CC-01 | 2021 | Active |
| Ebright Wight Maintenance | CC-01 | 2011 | Active |
| Eco Community Builders LLC | CC-01 | 2022 | Active |
| Ecotech Energy Systems LLC | CC-01 | 2005 | Active |
| Edco Design LLC | CC-01 | 2022 | Active |
| Ehlinger Carpentry And Repair | CC-01 | 2026 | Active |
| El Paraiso Landscaping | CC-01 | 2026 | Active |
| Ellwanger Painting LLC | CC-01 | 2023 | Active |
| Emission Technologies Inc. | CC-01 | 2001 | Active |
| En Christo LLC | CC-01 | 2019 | Active |
| Enviro Northwest LLC | CC-01 | 2013 | Active |
| Environmental Insul & Cont LLC | CC-01 | 2016 | Active |
| Environmental Pest Control Inc | CC-01 | 2008 | Active |
| Envision Homes Inc | CC-01 | 2000 | Active |
| Equity Builders LLC | CC-01 | 2002 | Active |
| Erickson Interiors Inc | CC-01 | 2012 | Active |
| Ertl Property Services LLC | CC-01 | 2026 | Active |
| Ethos West Construction Inc | CC-01 | 2019 | Active |
| Evolve Contractors LLC | CC-01 | 2025 | Active |
| Express Junk Removal LLC | CC-01 | 2026 | Active |
| Exteriors Plus Northwest LLC | CC-01 | 2016 | Active |
| Exxel Pacific Inc | CC-01 | 1993 | Active |
| F&J General Contractors | CC-01 | 2018 | Active |
| Fairwood Construction LLC | CC-01 | 2018 | Active |
| Fast Property Management LLC | CC-01 | 2008 | Renew by Dec 28, 2026 |
| Feller Heating & A/C Inc | CC-01 | 1994 | Active |