| Leasehq | CC-01 | 2025 | Active |
| Left Coast Services | CC-01 | 2025 | Active |
| Lefthammer Construction LLC | CC-01 | 2022 | Active |
| Legacy General Remodeling LLC | CC-01 | 2024 | Renew by Dec 23, 2026 |
| Legacy Pro Construction | CC-01 | 2025 | Active |
| Leiland Construction LLC | CC-01 | 2020 | Renew by Nov 3, 2026 |
| Leo's General Contrs LLC | CC-01 | 2023 | Active |
| Leo's Welding/Fabrication LLC | CC-01 | 2010 | Active |
| Level Up Homes LLC | CC-01 | 2021 | Active |
| LGD Framing LLC | CC-01 | 2023 | Active |
| LH Construction | CC-01 | 2026 | Active |
| Liang's Construction Inc | CC-01 | 2013 | Active |
| Lifestyle Pavers | CC-01 | 2025 | Active |
| Lifetime Premier Homes LLC | CC-01 | 2018 | Active |
| Light Of Zion Painting | CC-01 | 2026 | Active |
| Lijie LLC | CC-01 | 2026 | Active |
| Linescape Of Washington LLC | CC-01 | 2007 | Active |
| Linwood Property LLC | CC-01 | 2014 | Active |
| Lithic Construction LLC | CC-01 | 2023 | Active |
| Littell House Construction LLC | CC-01 | 2019 | Active |
| Littlefield Construction LLC | CC-01 | 2026 | Active |
| Living Elements LLC | CC-01 | 2016 | Active |
| Livingspace | CC-01 | 2019 | Active |
| Lkc25 LLC | CC-01 | 2025 | Active |
| LNS Construction LLC | CC-01 | 2017 | Active |
| Local Built Homes LLC | CC-01 | 2024 | Renew by Nov 22, 2026 |
| Local Master Garage Doors LLC | CC-01 | 2026 | Active |
| Local Master Lcksmith 24/7 LLC | CC-01 | 2026 | Active |
| Lockhart-Suver LLC | CC-01 | 2004 | Active |
| Loken Construction Co | CC-01 | 2001 | Active |
| Lommen Brothers Construction | CC-01 | 2023 | Active |
| London Design Build LLC | CC-01 | 2012 | Active |
| Longbranch Construction LLC | CC-01 | 2021 | Active |
| Los Tres Rosas Garden Serv LLC | CC-01 | 2025 | Active |
| Low Income Housing Institute | CC-01 | 2002 | Active |
| Loyal Design LLC | CC-01 | 2023 | Active |
| Loyal Mechanical Inc | CC-01 | 1986 | Active |
| Lucas Designs LLC | CC-01 | 2026 | Active |
| Lucid Developments LLC | CC-01 | 2025 | Active |
| Lucky Star Construction | CC-01 | 2023 | Active |
| Luckyboy Painting LLC | CC-01 | 2010 | Active |
| Lumen Blinds LLC | CC-01 | 2022 | Active |
| Lumenomics Inc | CC-01 | 2012 | Renew by Dec 1, 2026 |
| Luna Home Improvements LLC | CC-01 | 2019 | Active |
| Luna Park Construction LLC | CC-01 | 2019 | Active |
| Luna Remodel LLC | CC-01 | 2017 | Active |
| Luxe Kitchen & Bath LLC | CC-01 | 2024 | Active |
| Luxe Stijl Design LLC | CC-01 | 2015 | Active |
| Luxmore Construction Inc | CC-01 | 2023 | Active |
| M C Bellan Construction Inc | CC-01 | 1988 | Active |
| M D Design | CC-01 | 2005 | Active |
| M G H Inc | CC-01 | 1997 | Active |
| M J Takisaki Inc | CC-01 | 1988 | Active |
| M R J Constructors LLC | CC-01 | 1999 | Active |
| M R L Construction LLC | CC-01 | 2008 | Active |
| M&H Services LLC | CC-01 | 2023 | Active |
| M&J Remodeling Contractor LLC | CC-01 | 2023 | Active |
| M&T Refrigeration RPR SRVC LLC | CC-01 | 2023 | Active |
| Ma's General Construction Inc | CC-01 | 2001 | Active |
| Maac Investments & Srvcs LLC | CC-01 | 2025 | Active |
| Mac's Flooring LLC | CC-01 | 2024 | Active |
| Macdonald-Miller Fac Solns LLC | CC-01 | 2020 | Active |
| Machinists Inc | CC-01 | 2019 | Active |
| Mack N Williams Contrctng LLC | CC-01 | 2024 | Renew by Dec 26, 2026 |
| Macro Ecto LLC | CC-01 | 2026 | Active |
| Madison Construction LLC | CC-01 | 2025 | Active |
| Madison General Contrs LLC | CC-01 | 2025 | Active |
| Madison Master Builders Inc | CC-01 | 2019 | Active |
| Madison Park Handyman LLC | CC-01 | 2019 | Active |
| Madrona Construction | CC-01 | 2020 | Active |
| Madrow Homes LLC | CC-01 | 2020 | Renew by Nov 2, 2026 |
| Magazine Quality Kitchens | CC-01 | 2016 | Active |
| Magnitude Enterprises LLC | CC-01 | 2019 | Active |
| Magnolia Home Service Pros LLC | CC-01 | 2024 | Active |
| Mainstream Enterprise LLC | CC-01 | 2021 | Active |
| Maintenance Solutions Inc | CC-01 | 2015 | Active |
| Mak's Painting Company LLC | CC-01 | 2026 | Active |
| Make It Sparkle Res Srvcs LLC | CC-01 | 2022 | Active |
| Make It Wright HVAC LLC | CC-01 | 2019 | Active |
| Mallet Inc | CC-01 | 1999 | Active |
| Managemowed | CC-01 | 2024 | Active |
| Mankind Construction LLC | CC-01 | 2026 | Active |
| Manson Construction Co | CC-01 | 1997 | Active |
| Marble MD Design LLC | CC-01 | 2025 | Active |
| Marbs Renovations LLC | CC-01 | 2024 | Active |
| Marc The Handyman | CC-01 | 2024 | Renew by Oct 31, 2026 |
| Marcam LLC | CC-01 | 2024 | Active |
| Marcus & Luigi HVAC LLLP | CC-01 | 2026 | Active |
| Marene Construction Inc | CC-01 | 2021 | Active |
| Marian Built LLC | CC-01 | 2014 | Active |
| Marine Vacuum Service Inc | CC-01 | 1991 | Active |
| Maritime Roofing & Const LLC | CC-01 | 2019 | Active |
| Mark Mehlhaff Company LLC | CC-01 | 2015 | Active |
| Marpac Construction LLC | CC-01 | 1995 | Active |
| Marquiss Construction Co Inc | CC-01 | 1988 | Active |
| Mars Artek Construction LLC | CC-01 | 2026 | Active |
| Martinez Floor Installation | CC-01 | 2002 | Active |
| Martini Construction Inc | CC-01 | 2020 | Active |
| Martir Construction LLC | CC-01 | 2014 | Active |
| Marysville 172nd Dvlpmnt LLC | CC-01 | 2023 | Active |