| Mak Services LLC | CC-01 | 2019 | Active |
| Manchik Woodcraft LLC | CC-01 | 2026 | Active |
| Mando LLC | CC-01 | 2025 | Active |
| Manny's Remodeling LLC | CC-01 | 2023 | Active |
| Mar Landscaping & Construction | CC-01 | 2020 | Active |
| Marban's Construction LLC | CC-01 | 2024 | Active |
| Marblelife Of Seattle-Tacoma | CC-01 | 2010 | Active |
| Marchuks Quality Designs LLC | CC-01 | 2024 | Active |
| Mariupolstroy LLC | CC-01 | 2024 | Active |
| Mark V Construction LLC | CC-01 | 2026 | Active |
| Markopi Inc | CC-01 | 2007 | Active |
| Martinez Painting Services LLC | CC-01 | 2013 | Active |
| Massey Home Services | CC-01 | 2021 | Active |
| Master Fence LLC | CC-01 | 2023 | Active |
| Master Prestige Const LLC | CC-01 | 2026 | Active |
| Masterpeace Const & Rmdlng LLC | CC-01 | 2026 | Active |
| Max Comfort Service LLC | CC-01 | 2022 | Renew by Dec 8, 2026 |
| Maxpro Building LLC | CC-01 | 2026 | Active |
| Maxteca Inc | CC-01 | 2022 | Renew by Oct 30, 2026 |
| Maya's Contracting LLC | CC-01 | 2019 | Active |
| Mba Homes LLC | CC-01 | 2026 | Active |
| McCann's Brush Control LLC | CC-01 | 2020 | Active |
| McFarland Excavating LLC | CC-01 | 2023 | Active |
| McLendi | CC-01 | 2026 | Active |
| MCM Drywall Inc | CC-01 | 2021 | Active |
| Medina The Builder LLC | CC-01 | 2021 | Active |
| Mendoza's Remodlng & Const LLC | CC-01 | 2020 | Active |
| Mendoza's Rsdntl Rmdlng LLC | CC-01 | 2022 | Active |
| Meridian Drywall Northwest Inc | CC-01 | 2016 | Active |
| Metier Construction Inc | CC-01 | 1995 | Active |
| MG Drywall LLC | CC-01 | 2024 | Active |
| MG Probuild LLC | CC-01 | 2026 | Active |
| Michael Tall Custom Homes Inc | CC-01 | 1997 | Active |
| Michael's Const & Home SVC LLC | CC-01 | 2024 | Active |
| Michel Fencing LLC | CC-01 | 2018 | Active |
| Midtown Builders Inc | CC-01 | 2007 | Active |
| Mifort Construction LLC | CC-01 | 2022 | Active |
| Mike Swanson PPC LLC | CC-01 | 2019 | Active |
| Mike's Lawn & Maintenance Inc | CC-01 | 2023 | Active |
| Mist'Er Rain | CC-01 | 2021 | Active |
| MK General Construction LLC | CC-01 | 2019 | Active |
| MMT Flooring LLC | CC-01 | 2019 | Active |
| MN Stoneworks Inc | CC-01 | 2017 | Active |
| Modern Construction Pro LLC | CC-01 | 2024 | Renew by Dec 23, 2026 |
| Mokan Homes LLC | CC-01 | 2019 | Active |
| Monty Warren Painting Inc | CC-01 | 1984 | Active |
| Monument Construction PNW LLC | CC-01 | 2026 | Active |
| Mora's Fncng & Lndscpg Serv LL | CC-01 | 2019 | Active |
| Morado LLC | CC-01 | 2026 | Active |
| Mount Brothers Const LLC | CC-01 | 2017 | Active |
| Mount View Construction LLC | CC-01 | 2023 | Active |
| MPV Construction LLC | CC-01 | 2024 | Renew by Nov 27, 2026 |
| Mr Contractor LLC | CC-01 | 2019 | Active |
| Mtlandscape LLC | CC-01 | 2024 | Active |
| Mutual Industries Inc | CC-01 | 1996 | Active |
| MVS Framing Solutions LLC | CC-01 | 2025 | Active |
| MVS General Construction LLC | CC-01 | 2023 | Active |
| My Brothers Plumbing LLC | CC-01 | 2020 | Active |
| Myhas Inc | CC-01 | 2016 | Active |
| MZK Construction LLC | CC-01 | 2022 | Active |
| Narrative Craftwork LLC | CC-01 | 2024 | Active |
| Nathaly Jntrl/Hndymn SRV LLC | CC-01 | 2025 | Active |
| Nazar Ko LLC | CC-01 | 2015 | Active |
| Nelson Construction Inc | CC-01 | 1979 | Active |
| New Dimension Plus LLC | CC-01 | 2023 | Active |
| New Hope Construction LLC | CC-01 | 2026 | Active |
| Next Chapter Property Services | CC-01 | 2025 | Active |
| Nice View Wtrprfng & Const LLC | CC-01 | 2018 | Active |
| Nicks General Services LLC | CC-01 | 2026 | Active |
| Nieto's Construction Group LLC | CC-01 | 2023 | Active |
| Njad LLC | CC-01 | 2021 | Active |
| NM Koval Construction LLC | CC-01 | 2023 | Active |
| Noble Homes LLC | CC-01 | 2014 | Active |
| Norcal Pro LLC | CC-01 | 2016 | Active |
| North West General Contrng LLC | CC-01 | 2016 | Active |
| Northwest Air Control Inc | CC-01 | 2014 | Active |
| Northwest Artisan Tile Co LLC | CC-01 | 2024 | Active |
| Northwest BLDG Endeavors LLC | CC-01 | 2022 | Active |
| Northwest Exterior Const LLC | CC-01 | 2024 | Active |
| Northwest Home Imp/Repair Inc | CC-01 | 2006 | Active |
| Northwest Interiors Flrng LLC | CC-01 | 2016 | Active |
| Northwest Proframing LLC | CC-01 | 2017 | Active |
| Northwest Roof Management LLC | CC-01 | 2019 | Active |
| Northwest Stone & Craft LLC | CC-01 | 2022 | Active |
| Northwest Tile Roofing LLC | CC-01 | 1999 | Active |
| Nova Homes LLC | CC-01 | 2023 | Active |
| Novello Construction LLC | CC-01 | 2025 | Active |
| Novy Dvor Construction LLC | CC-01 | 2025 | Active |
| Numatic Finishing Corporation | CC-01 | 2015 | Active |
| Nvo Pro Services LLC | CC-01 | 2024 | Renew by Nov 4, 2026 |
| NW Mountain Air Inc | CC-01 | 2000 | Active |
| NW Pacific Tile LLC | CC-01 | 2007 | Active |
| NW Premium Design LLC | CC-01 | 2024 | Active |
| NW Quality Service LLC | CC-01 | 2024 | Active |
| NW Renovation Avenue LLC | CC-01 | 2024 | Active |
| NW Urban Construction LLC | CC-01 | 2019 | Active |
| NWPM Construction LLC | CC-01 | 2020 | Active |
| O D Build Co LLC | CC-01 | 2026 | Active |
| Okc Builders LLC | CC-01 | 2017 | Active |
| Oldcastle Infrastructure Inc | CC-01 | 2019 | Active |