| Joes Rockeries/Excavating LLC | CC-01 | 2017 | Active |
| Johnson's Junk Removal LLC | CC-01 | 2020 | Active |
| Journey Const & Lndscpg PLLC | CC-01 | 2022 | Active |
| Jr's Excavating LLC | CC-01 | 2026 | Active |
| JW Builders LLC | CC-01 | 2016 | Active |
| JWP Construction LLC | CC-01 | 2012 | Active |
| K & M's Home Construction LLC | CC-01 | 2012 | Active |
| K & S Painting Contractor LLC | CC-01 | 2017 | Active |
| K Con LLC | CC-01 | 2019 | Active |
| K-Planting LLC | CC-01 | 2021 | Active |
| Kanzler Enterprises LLC | CC-01 | 2026 | Active |
| Kas Painting Services | CC-01 | 2026 | Active |
| Kauffman Construction LLC | CC-01 | 2024 | Renew by Nov 4, 2026 |
| Kdmi Incorporated | CC-01 | 2025 | Active |
| Kelso Custom Repair LLC | CC-01 | 2023 | Active |
| Kendall Excavating Inc | CC-01 | 2014 | Active |
| King Pine BLDG Restoration LLC | CC-01 | 2019 | Active |
| King Tile & Stone LLC | CC-01 | 2015 | Active |
| Kingbuilt LLC | CC-01 | 2023 | Active |
| Kirkman Built LLC | CC-01 | 2025 | Active |
| Klim Roofing And Const Inc | CC-01 | 2011 | Active |
| Koester Construction LLC | CC-01 | 2020 | Renew by Dec 22, 2026 |
| Krsco Construction | CC-01 | 2018 | Active |
| Ksoutdoor Services LLC | CC-01 | 2025 | Active |
| L L C The Best Remodeling | CC-01 | 2024 | Active |
| Lamb Renovation LLC | CC-01 | 2022 | Active |
| Lance Harvey Trckng & Exca Inc | CC-01 | 2000 | Active |
| Landcrafting Inc | CC-01 | 2002 | Active |
| Lane Const & Rmdlng LLC | CC-01 | 2023 | Active |
| Lane's Construction Servs LLC | CC-01 | 2021 | Active |
| Laser Undrgrnd & Erthwrks Inc | CC-01 | 1990 | Active |
| Legacy Construction Wa LLC | CC-01 | 2022 | Active |
| Legacy Detail LLC | CC-01 | 2023 | Active |
| Legacy Tapping Inc | CC-01 | 2018 | Renew by Dec 28, 2026 |
| Legend Builds LLC | CC-01 | 2023 | Active |
| Lerch Acres Construction | CC-01 | 2025 | Active |
| Lifetime Green Coatings 044-wa | CC-01 | 2024 | Active |
| Lifetime Heating & Air Cndtng | CC-01 | 2018 | Active |
| Limitless Plumbing & Sewer LLC | CC-01 | 2019 | Active |
| Limitless Undergrnd SLTN LLC | CC-01 | 2026 | Active |
| Linmak Construction LLC | CC-01 | 2021 | Active |
| Lion Construction LLC | CC-01 | 2013 | Active |
| Lockie Homes LLC | CC-01 | 2013 | Active |
| Long's Landscape LLC | CC-01 | 2003 | Active |
| Lopez Renovations & Dev LLC | CC-01 | 2025 | Active |
| Loth Industries Inc | CC-01 | 2010 | Active |
| Louis F Matheson Const Inc | CC-01 | 1985 | Renew by Dec 19, 2026 |
| LTK LLC | CC-01 | 2026 | Active |
| Lux Construct LLC | CC-01 | 2018 | Renew by Nov 16, 2026 |
| LZS Construction Inc | CC-01 | 2016 | Active |
| M D Moon Construction Inc | CC-01 | 2026 | Active |
| Ma Petite Gardens | CC-01 | 2025 | Active |
| Machias Materials LLC | CC-01 | 2025 | Active |
| Machias Power | CC-01 | 2023 | Active |
| Mad Pipers Plumbing LLC | CC-01 | 2025 | Active |
| Magirus Construction LLC | CC-01 | 2024 | Active |
| Magnum Excavating Inc | CC-01 | 1992 | Active |
| Malone Construction LLC | CC-01 | 2019 | Active |
| Many Aspects Of Siding Inc | CC-01 | 2006 | Active |
| Marcus Drywall Incorporated | CC-01 | 1998 | Active |
| Mario's Contractors LLC | CC-01 | 2020 | Active |
| Martin Signs & Fabrication Inc | CC-01 | 1994 | Active |
| Master's Construction Serv LLC | CC-01 | 2008 | Renew by Dec 23, 2026 |
| Mather Mountain Cnstrctn LLC | CC-01 | 2026 | Active |
| Matt Echelbarger BLDG Co Inc | CC-01 | 2001 | Active |
| Mattco Construction LLC | CC-01 | 2023 | Active |
| Mattila Painting Inc | CC-01 | 1988 | Active |
| Mauck Industries Inc | CC-01 | 2008 | Active |
| Mauro Electric Heating & Air | CC-01 | 2025 | Active |
| Max Tile LLC | CC-01 | 2023 | Active |
| McBride Construction LLC | CC-01 | 2018 | Active |
| McCutchan Inc | CC-01 | 2012 | Renew by Dec 16, 2026 |
| MDR Contracting LLC | CC-01 | 2022 | Active |
| Mechanical Energy Sltns LLC | CC-01 | 2023 | Active |
| Meltoni Construction LLC | CC-01 | 2019 | Active |
| Menard & Sons Construction LLC | CC-01 | 2020 | Renew by Nov 29, 2026 |
| Metalsmiths Inc, The | CC-01 | 1986 | Active |
| Method Traffic Services LLC | CC-01 | 2021 | Active |
| Millennium Landscape/Const Inc | CC-01 | 2017 | Active |
| Miller Bros Landscaping Inc | CC-01 | 2003 | Active |
| MJ Landscaping Plus LLC | CC-01 | 2022 | Active |
| MK Flooring LLC | CC-01 | 2025 | Active |
| ML Design LLC | CC-01 | 2012 | Active |
| Montreaux Inc | CC-01 | 2017 | Active |
| Morris Remodeled LLC | CC-01 | 2026 | Active |
| Motech Design LLC | CC-01 | 2025 | Active |
| Mountain Home Exteriors LLC | CC-01 | 2015 | Active |
| Muzzy Building Company LLC | CC-01 | 2018 | Active |
| My Custom Homes LLC | CC-01 | 2026 | Active |
| My-Lan Company Inc | CC-01 | 2000 | Active |
| My-Way Construction LLC | CC-01 | 2009 | Active |
| Natural Concept Lndscp Co Inc | CC-01 | 1993 | Active |
| NCS Construction Service LLC | CC-01 | 2021 | Active |
| Newway Energy & Hometechnic | CC-01 | 2011 | Active |
| Next Finish LLC | CC-01 | 2022 | Active |
| Nexus Fabrication LLC | CC-01 | 2016 | Active |
| NF Contracting LLC | CC-01 | 2026 | Active |
| Nielsen Gardens Inc | CC-01 | 2018 | Active |
| Nomad Mechanical LLC | CC-01 | 2015 | Active |
| Nordic Home Solutions LLC | CC-01 | 2019 | Active |