| Censor Commercial Construction LLC | CGC2 + RSC | 2017 | Active |
| Center Line Construction Of The Cascades LLC | RGC | 2018 | Active |
| Central Cascade Structures LLC | CGC2, RGC | 2023 | Active |
| Central Castillo Flooring And Carpeting LLC | RGC | 2021 | Active |
| Central Home Installation Group LLC | RGC + LBPR | 2019 | Active |
| Central Oregon Concrete LLC | RGC | 2017 | Active |
| Central Oregon Countertops LLC | CGC2, RGC | 2017 | Active |
| Central Oregon Hand Crafted Log Homes LLC | RGC | 2020 | Active |
| Central Oregon Painting Services LLC | RGC | 2022 | Active |
| Central Oregon Pavement Services LLC | RGC | 2008 | Active |
| Central Oregon Repairs LLC | RGC | 2026 | Active |
| Central Oregon Servicemen LLC | RGC | 2026 | Active |
| Central Oregon Wood N Stoneworks LLC | RGC | 2017 | Active |
| Ceteem Design Build LLC | RGC | 2022 | Active |
| CH Buildworks LLC | RGC | 2026 | Active |
| Chavez M Construction Limited Liability Company | RGC | 2016 | Active |
| Chester Elliott Construction LLC | RGC | 2020 | Active |
| Chinook Contracting Inc | RGC | 2014 | Active |
| Choice One Builders LLC | RGC | 2009 | Active |
| Chris Scott Construction Inc | RGC | 1995 | Active |
| Chris Woody Contruction LLC | RGC | 2025 | Active |
| Christensen Plumbing Solutions LLC | CGC2, RGC | 2015 | Active |
| Christopher I Hatzai Mechanical Installations LLC | RGC | 2024 | Active |
| Chuck Webb Construction LLC | RGC | 2007 | Active |
| Cimarron Construction LLC | RGC | 2007 | Active |
| Cinder And Sage Landscape And Construction LLC | RGC | 2026 | Active |
| Circa Interiors LTD | RGC | 1992 | Active |
| CJ Heating & Supply Inc | RGC | 2007 | Active |
| Clapp Construction LLC | RGC | 2025 | Active |
| Clarks Home Services LLC | RGC | 2018 | Active |
| Classic Lines Carpentry Inc | RGC | 1997 | Active |
| Clawhammer Construction LLC | RGC | 2021 | Active |
| Cleanline Seamless Gutters LLC | RGC | 2023 | Active |
| Clearview Builders Inc | RGC | 1996 | Active |
| Cloninger Custom Homes LLC | RGC | 2010 | Active |
| Close Enough Construction LLC | RGC | 2025 | Active |
| Cloudcrest Homes LLC | RGC | 2014 | Active |
| Clout Contracting LLC | RGC | 2022 | Active |
| Clowers Carpentry Inc | RGC | 1993 | Active |
| CNC Homes LLC | RGC | 2016 | Active |
| Coalesce Concrete LLC | RGC | 2022 | Active |
| Coh20 Central Oregon Water Treatment & Purification LLC | RGC | 2007 | Active |
| Cohen Skovborg LLC | CGC1, RGC + LBPR | 2005 | Active |
| Collected LLC | RGC | 2021 | Active |
| Columbia Basin Exteriors LLC | CGC1, RGC | 2014 | Active |
| Commercial Flooring Solutions LLC | RGC | 2020 | Active |
| Compass Commercial Construction Services LLC | CGC2, RGC | 2009 | Active |
| Compass Contracting LLC | RGC | 2010 | Active |
| Concept Homes LLC | RGC | 2021 | Active |
| Concrete Worx LLC | RGC + CSC2 | 2019 | Active |
| Confluence Building & Design Inc | RGC | 2017 | Active |
| Connolly Construction LLC | RGC | 2005 | Active |
| Construct Siding Corp | RGC + CSC1 | 2016 | Active |
| Cooper Nagel Handyman Services LLC | RGC | 2019 | Active |
| Coopers Custom Carpentry Inc | RGC | 1995 | Active |
| Copperline Homes Inc | RGC | 2010 | Active |
| Cornerstone Excavation And Utilities LLC | CGC2, RGC | 2022 | Active |
| Cornerstone Residential LLC | CGC1, RGC | 2016 | Active |
| Cory A Vroom Construction LLC | RGC | 2021 | Active |
| Cory Brown Construction Inc | RGC | 2018 | Active |
| Costa Excavation LLC | RGC | 2025 | Active |
| Coughlin Electric LLC | CGC2, RGC | 2021 | Active |
| Cow Dog Dirt Works LLC | RGC | 2026 | Active |
| Cowgirl Painting LLC | RGC | 2023 | Active |
| Cozy Home Contracting LLC | RGC + LBPR | 2026 | Active |
| CPR For Your Home LLC | RGC + LBPR | 2023 | Active |
| CR Contracting LLC | CGC2, RGC | 2007 | Active |
| Crave Custom Builders LLC | RGC | 2020 | Active |
| Creations And Repairs LLC | RGC | 2022 | Active |
| Creative Craftsman LLC | RGC | 2026 | Active |
| Creative Handyman Construction LLC | RGC | 2019 | Active |
| Creo Luxe Interiors LLC | RGC | 2025 | Active |
| Crisafis Concrete & Carpentry Inc | RGC | 2008 | Active |
| Crooked Road Project Pros LLC | RGC | 2025 | Active |
| Crownover Custom Construction LLC | RGC | 2019 | Active |
| Crystal Clear Cleaning Inc | CGC2 | 2003 | Active |
| CS Residential LLC | RGC | 2006 | Active |
| CTL Construction Inc | CGC2, RGC | 1998 | Active |
| CTR Construction LLC | RGC | 2026 | Active |
| CTS Handy Services And Remodel LLC | RGC | 2009 | Active |
| Cummings Design Build LLC | RGC | 2022 | Active |
| Curtis Homes LLC | CGC1, RGC | 2009 | Active |
| Custom Construction Services LLC | RGC | 2006 | Active |
| Custom Masonry Design Inc | CGC2, RGC | 2023 | Active |
| Cutrite Concrete Cutting LLC | CGC1, RGC | 2014 | Active |
| CWC Construction Inc | RGC | 2016 | Active |
| D E Rink Construction Inc | RGC | 1990 | Active |
| Dal LLC | RGC | 2022 | Renew by Nov 15, 2026 |
| Daley Construction Company Inc | RGC + CSC2 | 1990 | Active |
| Damien Daniels Construction Inc | RGC | 2008 | Active |
| Dan Lundgren Construction LLC | RGC | 1994 | Active |
| Dan Thompson Excavation Inc | CGC2 + RSC | 1995 | Active |
| Daniel Simmons Contracting Inc | CGC2, RGC | 2016 | Active |
| Daniel Sweeney Construction LLC | CGC2, RGC + LBPR | 2011 | Active |
| Dannunzio Construction & Renovation LLC | RGC | 2017 | Active |
| Dansky Handcrafted LLC | RGC | 2005 | Active |
| Darin Campbell Contracting LLC | RGC | 2010 | Active |
| Darin Lones Construction LLC | RGC | 2008 | Active |
| Dark Timber Builders LLC | CGC2, RGC | 2021 | Active |
| Davenport Management Services LLC | RGC | 2013 | Active |