| Mountain Modern LLC | RGC | 2026 | Active |
| Mountain Town Home Inspection LLC | RGC | 2017 | Active |
| Mountaintop Plumbing LLC | RGC | 2026 | Active |
| Mountainview Builders Inc | RGC | 1996 | Active |
| Mova Construction LLC | RGC | 2017 | Active |
| MRT Construction Inc | RGC | 2023 | Active |
| MST Designs LLC | RGC + LBPR | 2024 | Active |
| Mt Roofing & Construction LLC | RGC | 2026 | Active |
| MTM Builders Inc | RGC | 2015 | Active |
| Mueller Construction Services Inc | CGC2, RGC | 2014 | Active |
| Mueller Home Repair & Remodel LLC | RGC | 2019 | Active |
| Mufasa Quality Painting LLC | RGC | 2025 | Active |
| Muller Build And Renovate LLC | RGC | 2025 | Active |
| Multicraft Services LLC | RGC | 2022 | Active |
| Murphys Fabrication LLC | RGC | 2024 | Active |
| MW Civil LLC | CGC2 + RSC | 2024 | Active |
| MW Construction Services Inc | CGC2, RGC | 2024 | Active |
| MW Maintenance LLC | RGC | 2026 | Active |
| N & J Painting LLC | RGC | 2018 | Active |
| Nascent Construction LLC | RGC | 2022 | Active |
| Nase Company LLC | CGC2 | 2013 | Active |
| Nathans Custom Woodworking LLC | RGC | 2023 | Active |
| National Solar Inc | RGC | 2009 | Active |
| Navs Roofing LLC | RGC | 2018 | Active |
| Neff Industries Inc | RGC | 2021 | Active |
| Nelson HVAC & Construction LLC | RGC | 2026 | Active |
| Nelson Tile & Stone Inc | CGC1, RGC | 2007 | Active |
| Nettwork Builders Inc | RGC + LBPR | 2012 | Active |
| Nettwork Construction LLC | RGC | 2019 | Active |
| New Age Plastering LLC | RGC | 2015 | Active |
| New Era Granite Inc | RGC + CSC1 | 2013 | Active |
| New Era Homes LLC | RGC | 2007 | Active |
| New Image Carpentry LLC | RGC | 2021 | Active |
| New Vision Renovations LLC | RGC | 2021 | Active |
| Newman Brothers Painting LLC | CGC2, RGC + LBPR | 2005 | Active |
| Next Ridge Construction LLC | RGC | 2025 | Active |
| Nicholas Wilson Construction LLC | RGC | 2018 | Renew by Dec 14, 2026 |
| Nicks Quality Finish LLC | RGC + LBPR | 2018 | Active |
| Nline Energy Inc | CGC1 | 2024 | Active |
| NMC Inc | RGC | 1988 | Active |
| No Fuss Handyman Service LLC | RGC | 2019 | Active |
| Noble Builders LLC | RGC | 2005 | Active |
| Noble Construct LLC | RGC | 2024 | Active |
| Nolte Design & Construction LLC | RGC | 2008 | Active |
| Nordic Construction LLC | RGC | 2010 | Active |
| Norman Building & Design LLC | CGC1, RGC | 2001 | Active |
| North Build Co LLC | CGC2, RGC | 2026 | Active |
| North Country Builders LLC | RGC | 2024 | Active |
| North Rim Construction LLC | RGC | 2020 | Renew by Dec 1, 2026 |
| North Rim Electric LLC | RGC + CSC2 | 2015 | Active |
| North Slope Builders LLC | RGC | 2013 | Active |
| Northern Lights Construction LLC | RGC | 2017 | Active |
| Northwest Best Builders LLC | RGC | 2026 | Active |
| Northwest Framing Systems Inc | RGC + CSC2 | 2010 | Renew by Dec 2, 2026 |
| Northwest Heating LLC | RGC | 2023 | Active |
| Northwest Home Productions LLC | RGC | 2026 | Active |
| Northwest Modern Builders LLC | RGC | 2019 | Active |
| Northwest Painting & Restoration Inc | CGC2, RGC | 2018 | Active |
| Northwest Premium Construction LLC | RGC | 2022 | Active |
| Northwest Quality Construction Inc | CGC2, RGC | 2009 | Active |
| Northwest Quality Roofing LLC | CGC2, RGC + LBPR | 2009 | Active |
| Norton Millwork & Co LLC | RGC | 2021 | Active |
| NW Turf Services LLC | CGC2, RGC | 2019 | Active |
| Nwonderland LLC | RGC | 2024 | Active |
| O R Construction LLC | RGC | 2007 | Active |
| O4 Construction LLC | CGC2 | 2006 | Active |
| Obsidian Builders Inc | RGC | 2002 | Active |
| Obsidian Construction Specialists LLC | RGC | 2023 | Active |
| Obsidian Roofing LLC | RGC | 2016 | Active |
| Oddco LLC | RGC | 2025 | Active |
| Olagues Landscape Maintenance LLC | RGC | 2020 | Active |
| Old Bend Handyman Services LLC | RGC | 2024 | Renew by Dec 3, 2026 |
| Old World Finishing Inc | RGC | 2015 | Renew by Dec 3, 2026 |
| Ollin Construction LLC | RGC | 2014 | Active |
| Olsen Brothers Construction LLC | RGC | 2006 | Active |
| Olson Building And Design LLC | RGC | 2015 | Active |
| Olson Built LLC | RGC | 2018 | Active |
| Olympus Construction LLC | RGC | 2026 | Active |
| Omega Construction Enterprises LLC | RGC | 2026 | Active |
| Omega Media Solutions LLC | RGC + CSC2 | 2008 | Active |
| Omni Build LLC | RGC | 2010 | Active |
| On The Ridge Construction Inc | RGC | 2024 | Active |
| One Construction & Renovation LLC | RGC | 2012 | Active |
| Open Range Welding LLC | RGC | 2026 | Active |
| Optimum Painting Inc | RGC | 1994 | Active |
| Ordonez Roofing LLC | RGC | 2016 | Active |
| Oregon Deschutes Painting LLC | CGC2, RGC + LBPR | 2022 | Active |
| Oregon Empire Painting LLC | RGC | 2021 | Active |
| Oregon Enterprise LLC | RGC | 2017 | Active |
| Oregon Roots Construction LLC | RGC | 2016 | Active |
| Oregon Timberworks Inc | RGC | 2003 | Active |
| Organic Designs LLC | RGC | 2024 | Renew by Dec 23, 2026 |
| Ortiz Precise Roofing LLC | RGC | 2021 | Active |
| Outwest Builders LLC | CGC2, RGC | 2017 | Active |
| Over The Ridge Painting LLC | RGC | 2023 | Active |
| Over The Top Plumbing LLC | RGC | 2016 | Active |
| Owb Carpentry LLC | CGC2, RGC | 2024 | Renew by Nov 11, 2026 |
| Ozland General Contracting LLC | CGC2, RGC | 2019 | Active |
| Pacific Crest Glass LLC | RGC | 2023 | Active |
| Pacific Northwest Garage Doors LLC | RGC | 2021 | Active |