| Kode General Contracting LLC | CC-01 | 2025 | Active |
| Kolmo LLC | CC-01 | 2025 | Active |
| Kovnest Creek LLC | CC-01 | 2024 | Active |
| KP Flooring Solutions LLC | CC-01 | 2023 | Active |
| Kris' Construction LLC | CC-01 | 2021 | Active |
| KRS Incorporated | CC-01 | 2019 | Active |
| Krupp LLC | CC-01 | 2009 | Active |
| KRV Painting LLC | CC-01 | 2022 | Active |
| L O G Renovation LLC | CC-01 | 2017 | Active |
| L Y Construction LLC | CC-01 | 2016 | Active |
| L&H Construction LLC | CC-01 | 2013 | Active |
| L&L Construction LLC | CC-01 | 2017 | Active |
| L&N Landscape LLC | CC-01 | 2022 | Active |
| L&T Pro Painters LLC | CC-01 | 2024 | Active |
| Laguna General Contractor LLC | CC-01 | 2023 | Active |
| Lake Construction & Design LLC | CC-01 | 2022 | Active |
| Lake Washington Windows/Doors | CC-01 | 2010 | Active |
| Laken Outdoor DSGN & Ldspg LLC | CC-01 | 2024 | Active |
| Lawton Builders Inc | CC-01 | 2007 | Active |
| Lazic Construction LLC | CC-01 | 2012 | Active |
| LB Construction LLC | CC-01 | 2024 | Renew by Nov 15, 2026 |
| LBD General Construction LLC | CC-01 | 2024 | Active |
| Legacy Group Inc | CC-01 | 2007 | Active |
| Legacy View Builders LLC | CC-01 | 2025 | Active |
| Lenxi Construction LLC | CC-01 | 2025 | Active |
| Leo Development LLC | CC-01 | 2026 | Active |
| LG Home Improvement LLC | CC-01 | 2018 | Active |
| LG Innovation | CC-01 | 2023 | Active |
| LH Remodeling & Const LLC | CC-01 | 2023 | Active |
| Linsang Construction LLC | CC-01 | 2018 | Active |
| Liu Sincere Construction LLC | CC-01 | 2020 | Active |
| Living Plus Construction Inc | CC-01 | 2019 | Active |
| Lluminet LLC | CC-01 | 2024 | Active |
| LNW Construction LLC | CC-01 | 2024 | Active |
| Local Neighbor Home Srvcs LLC | CC-01 | 2026 | Active |
| Locham Builders LLC | CC-01 | 2025 | Active |
| LP North West Carpentry LLC | CC-01 | 2026 | Active |
| LS Siding LLC | CC-01 | 2022 | Active |
| Lumi Land Remodeling LLC | CC-01 | 2026 | Active |
| Luxury Remodeling LLC | CC-01 | 2018 | Active |
| M Noonan Construction LLC | CC-01 | 2019 | Active |
| M&G Painting & More LLC | CC-01 | 2024 | Active |
| Mad Glass & Remodel LLC | CC-01 | 2026 | Active |
| Madrona Home Services LLC | CC-01 | 2012 | Active |
| Mafla's Cleaning Service LLC | CC-01 | 2021 | Active |
| Maggard Restoration LLC | CC-01 | 2025 | Active |
| Maiden Construction LLC | CC-01 | 2014 | Active |
| Makswell Construction | CC-01 | 2018 | Active |
| Maksyuta Construction LLC | CC-01 | 2022 | Active |
| Mana Tile Services | CC-01 | 2022 | Active |
| Map Remodeling LLC | CC-01 | 2018 | Active |
| Margullis Construction LLC | CC-01 | 2024 | Active |
| Mass & Mass LLC | CC-01 | 2017 | Active |
| Mast Timber & Tree Care LLC | CC-01 | 2024 | Active |
| Master Eifs LLC | CC-01 | 2019 | Active |
| Mastercraft Roofing Inc | CC-01 | 2008 | Active |
| Max Power Construction LLC | CC-01 | 2025 | Active |
| Mba Construction Corp | CC-01 | 2013 | Active |
| McCann Trucking & Excavating | CC-01 | 2003 | Active |
| McClincy's | CC-01 | 2009 | Active |
| McPherson's LLC | CC-01 | 2022 | Renew by Dec 2, 2026 |
| MDRG Home Services LLC | CC-01 | 2025 | Active |
| Meitzel Drywall LLC | CC-01 | 2023 | Active |
| Mendoza Gutters LLC | CC-01 | 2018 | Active |
| MG Countertop LLC | CC-01 | 2026 | Active |
| Miken Construction LLC | CC-01 | 2022 | Active |
| Mira Handyman Services LLC | CC-01 | 2018 | Active |
| Miter Specialty Restoratn LLC | CC-01 | 2016 | Active |
| MJW Services Inc | CC-01 | 2004 | Active |
| MKH Inc | CC-01 | 2013 | Active |
| MKP Design LLC | CC-01 | 2022 | Renew by Nov 8, 2026 |
| Mmy Home LLC | CC-01 | 2024 | Active |
| Modern Exchange LLC | CC-01 | 2022 | Active |
| Modern Professional Reno LLC | CC-01 | 2024 | Active |
| Modern Welds LLC | CC-01 | 2025 | Active |
| Monkey Fence LLC | CC-01 | 2025 | Active |
| Monkey's Services LLC | CC-01 | 2024 | Active |
| Monster Abatement And Demo LLC | CC-01 | 2022 | Active |
| Monstera Landscaping LLC | CC-01 | 2024 | Active |
| Morales Pro Remodeling LLC | CC-01 | 2026 | Active |
| Moreno Rios Brick Paver LLC | CC-01 | 2023 | Active |
| Moriarty Enterprises LLC | CC-01 | 1998 | Active |
| Mr Professional Flooring Inc | CC-01 | 2024 | Active |
| Mt Contractor LLC | CC-01 | 2025 | Active |
| Munoz's Land LLC | CC-01 | 2022 | Active |
| Naturalscape Design LLC | CC-01 | 2024 | Renew by Dec 30, 2026 |
| Neighbors Roofing LLC | CC-01 | 2026 | Active |
| New Life Const & Painting LLC | CC-01 | 2017 | Active |
| New Season Construction LLC | CC-01 | 2026 | Active |
| New View Tree & Lndscpng LLC | CC-01 | 2022 | Active |
| Newhaus Roofing & Construction | CC-01 | 2026 | Active |
| Next Level Home Exteriors LLC | CC-01 | 2025 | Active |
| Noels Landscaping LLC | CC-01 | 2021 | Active |
| Nonu Inc | CC-01 | 2026 | Active |
| Nor-Pac Siding & Interiors Inc | CC-01 | 2002 | Active |
| North West Handling Sys Inc | CC-01 | 1973 | Active |
| Northbeam Framing LLC | CC-01 | 2026 | Active |
| Northline Build LLC | CC-01 | 2026 | Active |
| Northwest Asphalt Inc | CC-01 | 1994 | Active |
| Northwest Best Choic Const LLC | CC-01 | 2025 | Active |