| K & D Tree Service LLC | CC-01 | 2024 | Active |
| K & J Landscaping LLC | CC-01 | 2014 | Active |
| K,evimeriacontractor LLC | CC-01 | 2016 | Active |
| Kalapus Construction LLC | CC-01 | 2024 | Active |
| Kanon LLC | CC-01 | 2026 | Active |
| Kayser PNTG & Gen Contr LLC | CC-01 | 2024 | Active |
| KC Ramos Painting LLC | CC-01 | 2026 | Active |
| Kevin's Handiman Services LLC | CC-01 | 2007 | Active |
| Khzhon Communications LLC | CC-01 | 2024 | Active |
| Kinetic Construction Inc | CC-01 | 1986 | Active |
| King County DCKS SDNG WNDS LLC | CC-01 | 2026 | Active |
| King County Window & Glass | CC-01 | 2019 | Active |
| Kingdom Cleaning LLC | CC-01 | 2024 | Renew by Dec 19, 2026 |
| Kitchen & Bath Builders LLC | CC-01 | 2020 | Active |
| Koa Construction Inc | CC-01 | 2014 | Active |
| Kov Build LLC | CC-01 | 2023 | Active |
| KSV Services LLC | CC-01 | 2017 | Active |
| Kva LLC | CC-01 | 2025 | Active |
| Lake Union Painting LLC | CC-01 | 2018 | Active |
| Lakecity LLC | CC-01 | 2013 | Renew by Nov 8, 2026 |
| Lakeland Home Remodeling LLC | CC-01 | 2022 | Active |
| Lara's Landscaping Service LLC | CC-01 | 2022 | Active |
| Lavelle Vac & Drainage LLC | CC-01 | 2004 | Active |
| Legacy Construction Group LLC | CC-01 | 2014 | Active |
| Legacy Home Builders LLC | CC-01 | 2025 | Active |
| Legacy Solutions Const LLC | CC-01 | 2025 | Active |
| Legion Master Pros LLC | CC-01 | 2026 | Active |
| Leo's Carpet & Flooring LLC | CC-01 | 2026 | Active |
| Leorex General Const LLC | CC-01 | 2026 | Active |
| LGSP Co | CC-01 | 2008 | Active |
| Lifetime Painting & Rmdlng LLC | CC-01 | 2025 | Active |
| Lik Construction LLC | CC-01 | 2023 | Active |
| Linkview LLC | CC-01 | 2025 | Active |
| Liz Services LLC | CC-01 | 2022 | Renew by Nov 6, 2026 |
| Lloyd Enterprises, Inc | CC-01 | 1977 | Active |
| Lorgan Construction LLC | CC-01 | 2026 | Active |
| LR Home Services LLC | CC-01 | 2022 | Active |
| Luga Construction LLC | CC-01 | 2024 | Active |
| Luna Homes NW Inc | CC-01 | 2021 | Active |
| Luna Insu & General Contrs LLC | CC-01 | 2017 | Active |
| Luv LLC | CC-01 | 2014 | Active |
| LV Renovations LLC | CC-01 | 2025 | Active |
| LVR Construction LLC | CC-01 | 2024 | Active |
| Lynx Enterprises Inc | CC-01 | 1993 | Active |
| LZG Construction LLC | CC-01 | 2013 | Active |
| M & D Building Const LLC | CC-01 | 2022 | Active |
| M A N Exclusive Tile STNG Cor | CC-01 | 2006 | Active |
| Maginniss Construction LLC | CC-01 | 2020 | Active |
| Mainline Plumbing & Drain | CC-01 | 2025 | Active |
| Mark's Handyman Services LLC | CC-01 | 2022 | Active |
| Martinez Lock & Key LLC | CC-01 | 2020 | Active |
| Marvel Construction LLC | CC-01 | 2025 | Active |
| Masterful Makeovers LLC | CC-01 | 2024 | Active |
| Max Built LLC | CC-01 | 2020 | Active |
| Maxwork LLC | CC-01 | 2024 | Active |
| MBS Construction LLC | CC-01 | 2013 | Active |
| MCH Mechanical LLC | CC-01 | 2024 | Active |
| Mechanical Insulating Inc | CC-01 | 2012 | Active |
| Mendoza Remodeling LLC | CC-01 | 2026 | Active |
| Mendoza Renovation LLC | CC-01 | 2026 | Active |
| Mercado Landscaping Servcs LLC | CC-01 | 2023 | Active |
| Mercy Painting LLC | CC-01 | 2021 | Active |
| Mes Exteriors | CC-01 | 2023 | Active |
| Metro Northwest LP | CC-01 | 2018 | Active |
| MGB Outdoor LLC | CC-01 | 2026 | Active |
| Miller & Sons Services | CC-01 | 2023 | Active |
| Millwork BP LLC | CC-01 | 2023 | Active |
| MK Carpentry LLC | CC-01 | 2016 | Renew by Dec 12, 2026 |
| MNM Handyman Service LLC | CC-01 | 2022 | Active |
| Modern Architecture LLC | CC-01 | 2022 | Active |
| Modern Const And Remodel LLC | CC-01 | 2015 | Active |
| Modern Style Build LLC | CC-01 | 2021 | Active |
| Mozco Group LLC | CC-01 | 2026 | Active |
| Mpi Restoration Group LLC | CC-01 | 2025 | Active |
| MPT Construction LLC | CC-01 | 2024 | Active |
| Mr Robinson's Electric LLC | CC-01 | 2025 | Active |
| MS Floors LLC | CC-01 | 2026 | Active |
| Mt Construction LLC | CC-01 | 2018 | Active |
| Mt Rainiers Const #1 LLC | CC-01 | 2025 | Active |
| MTM Contruction LLC | CC-01 | 2026 | Active |
| Munguia Construction LLC | CC-01 | 2022 | Active |
| MVR Group LLC | CC-01 | 2025 | Active |
| MX Concrete Solution LLC | CC-01 | 2022 | Active |
| NC Construction LLC | CC-01 | 2015 | Active |
| Neelu Build Studio LLC | CC-01 | 2025 | Active |
| New Beginnings Restoration | CC-01 | 2024 | Active |
| New Style Painting LLC | CC-01 | 2025 | Active |
| Nextphase Builders LLC | CC-01 | 2025 | Active |
| NG General Construction LLC | CC-01 | 2021 | Active |
| NJ PNTG And General Contr LLC | CC-01 | 2015 | Active |
| North Og Roofing LLC | CC-01 | 2025 | Active |
| Northcraft Handyman Servs LLC | CC-01 | 2026 | Active |
| Northern Home Services LLC | CC-01 | 2026 | Active |
| Northtop Contractors LLC | CC-01 | 2024 | Active |
| Northwest Coating Speclts LLC | CC-01 | 2022 | Active |
| Northwest Expert Heating LLC | CC-01 | 2025 | Active |
| Northwest Prefab & Framing Inc | CC-01 | 2015 | Active |
| Northwest Premium Const LLC | CC-01 | 2026 | Active |
| Northwest Vision Drywall LLC | CC-01 | 2018 | Renew by Nov 10, 2026 |
| Nova Finish Remodeling LLC | CC-01 | 2025 | Active |