| Jason Drake Enterprises Inc | RGC | 2007 | Active |
| Jason Olinger LLC | RGC | 2019 | Active |
| Jay Bird Construction Inc | RGC | 1990 | Active |
| Jay Delateur Construction Inc | RGC | 2024 | Active |
| JBM Construction LLC | RGC | 2021 | Active |
| Jeff Of All Trades LLC | RGC | 2007 | Active |
| Jeff Threlkeld Contracting LLC | RGC | 2024 | Active |
| JGM Painting LLC | RGC | 2016 | Active |
| JKD Construction Inc | CGC2, RGC | 2009 | Active |
| JLS Drywall Inc | RGC | 2004 | Active |
| JM Builders LLC | RGC | 2023 | Active |
| Jms2 Limited Liability Company | CGC2, RGC | 2025 | Active |
| Joel Carnagey Tile And Stone LLC | RGC | 2023 | Active |
| Joeys Construction & Lawn Care Services LLC | RGC | 2023 | Active |
| Johan Woodworking LLC | RGC | 2009 | Active |
| John Nitcher Construction Inc | RGC | 1994 | Active |
| Johns Tub Repair LLC | RGC | 2017 | Active |
| Johnson Design Build LLC | RGC | 2021 | Active |
| Jones Carpentry LLC | RGC | 2021 | Active |
| Jones Heritage Construction LLC | RGC | 2026 | Active |
| Jonny On The Spot Pest Control Inc | RGC | 2008 | Active |
| Josh Gourley Inspections & Repair LLC | RGC | 2022 | Active |
| Josh Mayes Construction LLC | RGC | 2023 | Active |
| Journey Home Renovations LLC | RGC | 2026 | Active |
| JPH Custom Carpentry LLC | RGC | 2024 | Active |
| Jr Butterfield Inc | RGC | 2023 | Active |
| Jr Faulkner Excavation II Inc | CGC2, RGC | 2007 | Active |
| Jr Milan Construction LLC | RGC | 2024 | Renew by Nov 5, 2026 |
| Jr S Construction LLC | RGC | 2019 | Active |
| Jr Strickland Construction LLC | RGC | 2022 | Active |
| JRP Drywall Enterprises Inc | RGC | 2004 | Active |
| JS Building LLC | RGC | 2013 | Active |
| JSW Designs Inc | RGC | 2022 | Active |
| JT Woods Construction LLC | RGC | 2009 | Active |
| JTRL Inc | RGC | 2023 | Active |
| JTS Construction LLC | RGC | 2015 | Active |
| Judson Construction Inc | CGC2, RGC | 2004 | Active |
| Juniper Window Solutions LLC | RGC | 2026 | Active |
| K & B Landscape Maintenance LLC | RGC | 2026 | Active |
| K & M Construction LLC | CGC2, RGC | 2018 | Active |
| K & P Remodeling Inc | RGC + LBPR | 2010 | Renew by Dec 15, 2026 |
| K Potter Restorations LLC | RGC | 2013 | Active |
| K2 Design Remodel LLC | RGC | 2020 | Active |
| Kai Enterprise Inc | RGC | 2019 | Active |
| Kanitz Hardwood Floors Inc | RGC | 1990 | Active |
| Karpstein Build&Repair LLC | RGC | 2026 | Active |
| Kaybee LLC | RGC | 2024 | Active |
| KCS Construction LLC | RGC | 2026 | Active |
| Keith Johnson Plumbing LLC | RGC | 2017 | Active |
| Kellcon Homes LLC | RGC | 2018 | Active |
| Kellcon Inc | CGC2 | 2017 | Active |
| Ken Baune Construction Inc | RGC | 2022 | Active |
| Kennedy Home Improvement LLC | RGC | 2026 | Active |
| Kenneth Buehner Construction Inc | CGC2, RGC | 2014 | Active |
| Kenneth E Thomas Construction LLC | RGC | 2005 | Active |
| Kercher Electric LLC | RGC | 2012 | Active |
| Kestrel Contracting LLC | RGC | 2026 | Active |
| Kevin Bryant Incorporated | RGC | 2018 | Active |
| Kevin Gibbs Construction LLC | RGC | 2006 | Renew by Dec 6, 2026 |
| Kevin Spencer Masonry LLC | CGC2, RGC | 2023 | Active |
| Keystone Building Inc | RGC | 2005 | Active |
| Keystone Painting LLC | RGC | 2026 | Active |
| KFJ Builders Inc | RGC | 2007 | Active |
| KGB Enterprises Inc | RGC + CSC2 | 2006 | Active |
| Kinetic Mechanical Solutions LLC | CGC2, RGC | 2025 | Active |
| King Construction & Remodel LLC | RGC | 2022 | Active |
| King Mountain Contracting LLC | RGC | 2007 | Active |
| Kingsman Construction LLC | RGC | 2023 | Active |
| Kinyon Construction & Contracting LLC | RGC | 2024 | Active |
| Kirby Nagelhout Construction Co | CGC1, RGC + LBPR | 1993 | Active |
| Kitcher Plumbing LLC | RGC | 2024 | Renew by Nov 12, 2026 |
| Klamath High Desert LLC | RGC | 2026 | Active |
| KN Visions Inc | CGC1, RGC | 2018 | Active |
| Knaughty Log Restoration, LLC | RGC | 2024 | Active |
| Knight Mechanical Inc | CGC2 | 2006 | Active |
| Knighted Construction LLC | RGC | 2025 | Active |
| Knotty Nates Custom Carpentry LLC | RGC | 2023 | Active |
| Kotlarz Construction LLC | RGC | 2022 | Active |
| KP Home And Lawn Services LLC | RGC | 2019 | Active |
| Krause Construction LLC | RGC | 2020 | Active |
| Kristian E Willman LLC | RGC | 2000 | Active |
| Kustom Kraft Sheetmetal & Roofing Corporation | RGC | 2019 | Active |
| L & C Family Construction LLC | RGC | 2026 | Active |
| Laguna Desert Construction LLC | RGC | 2022 | Active |
| Lancto Builders LLC | RGC | 2019 | Active |
| Land Management By Liberty Jones LLC | CGC2 | 2026 | Active |
| Landon Construction Inc | RGC | 2002 | Active |
| Larry Smith Construction LLC | RGC | 2003 | Active |
| Larsen Contracting LLC | RGC | 2018 | Active |
| Larsen Industries LLC | RGC | 2020 | Active |
| Laursen Builders LLC | RGC + LBPR | 2015 | Active |
| Lava Island Builders Corp | RGC + LBPR | 2018 | Active |
| Lava Rock Landscaping Inc | CGC1, RGC | 2026 | Active |
| LDR Construction & Remodeling LLC | RGC | 2025 | Active |
| Leader Builders LLC | CGC2, RGC | 2002 | Active |
| Leading Edge Painting LLC | RGC | 2016 | Active |
| Leading Edge Stone & Tile LLC | RGC | 2013 | Active |
| Lee Investment Inc | RGC | 2013 | Active |
| Legacy Hardscape Construction LLC | RGC | 2022 | Active |
| Legacy Plastering And Construction LLC | RGC | 2025 | Active |