| MG Remodeling Services LLC | RGC | 2024 | Active |
| MGGR Construction LLC | RGC | 2025 | Active |
| Micah Hill Construction LLC | RGC | 2013 | Active |
| Michael Gentry Construction Inc | RGC + LBPR | 2010 | Active |
| Michael Torgersons Fine Finishes LLC | CGC2 | 2003 | Active |
| Mick Miller Construction LLC | RGC + LBPR | 2019 | Active |
| Midas Construction LLC | RGC | 2025 | Active |
| Mighty Acorn LLC | RGC | 2017 | Active |
| Mighty Dogs General Contractors LLC | RGC | 2021 | Active |
| Mighty Hands Construction & Design LLC | RGC | 2025 | Active |
| Mighty Handy LLC | RGC + LBPR | 2012 | Active |
| Mihalut Construction LLC | RGC | 2023 | Active |
| Mikes Hardwood Floors LLC | RGC | 2017 | Active |
| Mikes Pruning And Tree Care LLC | RGC | 2016 | Active |
| Millennium Building Services Inc | CGC2, RGC | 1981 | Active |
| Miller & Hiller LLC | CGC2 | 2015 | Active |
| Miller Design LLC | RGC | 2023 | Active |
| Minority Construction Group LLC | CGC2, RGC | 2020 | Active |
| Minter Construction LLC | RGC | 2017 | Active |
| Mintworks LLC | RGC | 2018 | Active |
| Mitchell Inc | RGC + LBPR | 2010 | Active |
| Miv Construction LLC | RGC | 2021 | Active |
| MJ General Contractor LLC | CGC2, RGC | 2016 | Active |
| Mjbierly LLC | RGC | 2018 | Renew by Dec 31, 2026 |
| MKGF LLC | RGC + LBPR | 2024 | Active |
| ML Framing LLC | RGC | 2012 | Active |
| Mode Craftsman LLC | RGC | 2024 | Renew by Nov 4, 2026 |
| Modern Angle LLC | RGC | 2017 | Active |
| Modern Construction SM LLC | RGC | 2024 | Active |
| Modern Frame Renovations LLC | RGC | 2026 | Active |
| Modern Green Homes LLC | RGC + LBPR | 2018 | Active |
| Modern Kasa LLC | RGC | 2026 | Active |
| Modern Northwest Inc | CGC2, RGC | 2012 | Renew by Dec 21, 2026 |
| Modern Tile & Stone LLC | RGC | 2024 | Active |
| Modern Visions Construction Inc | RGC | 2005 | Active |
| Modheirloom LLC | RGC + LBPR | 2020 | Active |
| Momentum Talent Solutions LLC | RGC | 2026 | Active |
| Mono Construction LLC | CGC2, RGC | 2022 | Active |
| Montano Construction And Maintenance LLC | RGC | 2023 | Active |
| Montavilla Sheet Metal & Stainless Steel Inc | CGC2 | 2025 | Active |
| Montiel Exteriors LLC | RGC | 2026 | Active |
| Montoyas Painting LLC | RGC + LBPR | 2017 | Active |
| Moon Creek Redevelopment LLC | RGC | 2020 | Active |
| Mooney Construction And Development LLC | RGC + LBPR | 2013 | Active |
| Moontree Construction LLC | RGC | 2020 | Active |
| Moore Remodeling & Construction LLC | RGC + LBPR | 2012 | Active |
| Moose Made LLC | RGC | 2026 | Active |
| Morales Construction LLC | RGC | 2022 | Active |
| Moreno Renovations & Repairs LLC | RGC | 2026 | Active |
| Morgan Made LLC | RGC + LBPR | 2022 | Renew by Nov 28, 2026 |
| Mori Commercial Roofing Solutions LLC | CGC2, RGC | 2026 | Active |
| Morrison Built Inc | RGC | 2014 | Renew by Dec 4, 2026 |
| Morrison Construction LLC | RGC + LBPR | 2018 | Active |
| Mossproductions LLC | RGC | 2022 | Active |
| Mossy LLC | RGC | 2018 | Active |
| Motas Property Services LLC | RGC | 2024 | Active |
| Motorola Solutions Inc | CGC2 | 1999 | Active |
| Motueka LLC | RGC + LBPR | 2015 | Active |
| Movingtheworld Inc | CGC1 | 2026 | Active |
| MP Water And Fire Restoration Inc | CGC1, RGC | 2019 | Active |
| Mpi America LLC | RGC | 2004 | Active |
| Mr & Mrs Construction LLC | RGC | 2023 | Active |
| Mr Construction And Remodeling LLC | RGC | 2021 | Active |
| Mr Fix LLC | RGC | 2025 | Active |
| Mr Fixit LLC | RGC | 2025 | Active |
| Mr Maintenance LLC | RGC | 2006 | Active |
| Mr Portland LLC | RGC | 2025 | Active |
| Mr Roof Pro LLC | RGC | 2024 | Active |
| MRR Remodeling LLC | RGC | 2026 | Active |
| MS Savvy LLC | RGC | 2021 | Active |
| MSN Construction Inc | RGC | 1993 | Active |
| MSW Remodeling LLC | RGC | 2016 | Active |
| Mullin Construction LLC | RGC | 2021 | Active |
| Multnomah Landscape LLC | CGC1, RGC | 2023 | Active |
| Multnomah Restoration LLC | RGC | 2020 | Active |
| Murphy Construction LLC | RGC + LBPR | 2017 | Active |
| Murphy Ellis LLC | RGC | 2018 | Active |
| MVP Construction LLC | RGC | 2015 | Active |
| MW Construction LLC | RGC | 2020 | Active |
| MWS Woodworks LLC | RGC | 2009 | Active |
| My Custom Project LLC | RGC | 2019 | Active |
| My Guy Concrete And Construction LLC | RGC | 2025 | Active |
| My Guy Maintenance And Construction LLC | RGC | 2006 | Active |
| My Hardwood Floor LLC | RGC | 2011 | Active |
| My Home Improvement LLC | RGC | 2017 | Active |
| N & B General Construction LLC | RGC | 2026 | Active |
| N & P Drywall LLC | RGC | 2021 | Active |
| N W Eagle Stone LLC | RGC | 2004 | Active |
| Nail Meets Wood LLC | CGC2, RGC + LBPR | 2019 | Active |
| Nailed It Contracting LLC | RGC | 2022 | Active |
| Nailed It Remodeling & Construction LLC | RGC | 2019 | Active |
| Nails It LLC | RGC | 2015 | Active |
| Nancy Thorn Inc | CGC1 | 2025 | Active |
| Napoles Home Solutions LLC | RGC + LBPR | 2023 | Renew by Dec 9, 2026 |
| Nasco LLC | RGC | 2022 | Active |
| Nathan D Young Construction Inc | CGC2, RGC | 1998 | Active |
| Natural Grain Home Services LLC | RGC | 2015 | Active |
| Nava Underground Construction LLC | CGC2, RGC | 2025 | Active |
| Nayis Quality Painting LLC | RGC | 2026 | Active |
| Naz Construction LLC | RGC | 2008 | Active |