| Jeterbuilt Construction Inc | B + C10 | 2006 | Active |
| JSB Inc | B | 2015 | Active |
| K2 Development Company Inc | B | 2009 | Active |
| Kelly Excavation Inc | A + C21 | 2021 | Active |
| Kraftwork Industries Inc | B + C10 | 1988 | Active |
| Laustalot Construction Inc | B | 2005 | Active |
| Leckey Land Clearing | A + C21 | 1993 | Active |
| Ledford Construction And Concrete Inc | A + C8 | 2025 | Active |
| Lendman Construction Inc | B | 2004 | Active |
| M D I General Contracting | B | 2012 | Active |
| M D S Engineering & Construction Inc | A, B + HAZ | 2005 | Active |
| M5 Excavation | A | 2025 | Active |
| Maas And Sons Construction A Partnership | B + C10, C36 | 2022 | Active |
| Make Works Engineering | A | 2025 | Active |
| Mann Construction Company | A | 2011 | Active |
| Manning Steve Construction Inc | A | 1998 | Active |
| Mast Construction LLC | B | 2025 | Active |
| MC Entire Landscaping Inc | A + C27 | 1978 | Active |
| MC George Mark Construction Inc | B | 2006 | Active |
| McNames Framing Inc | B + C5, C6 | 2003 | Active |
| Meyers Earthwork Inc | A + C21, HAZ | 1992 | Renew by Nov 30, 2026 |
| Middleton Homes Corporation | B | 2015 | Active |
| Morgan Creek Construction Inc | A, B + C8, D34, HAZ | 1981 | Active |
| Muse Concrete Contractors Inc | A, B + C8 | 1982 | Active |
| N & T Digmore Inc | A | 1988 | Active |
| N S W D Incorporated | B + C6 | 2004 | Active |
| Nidever Construction Inc | B | 2024 | Active |
| Norcal Construction And Restoration | B2 | 2015 | Active |
| Norcal Pools And Construction | B + C53 | 2005 | Active |
| North State Builder Inc | B | 2000 | Active |
| North Valley Builders S C Inc | B | 1980 | Renew by Oct 31, 2026 |
| North Valley Remodeling LLC | B2 | 2023 | Active |
| North View Construction | B + C27 | 2000 | Active |
| North Woods Excavating Inc | A | 2018 | Active |
| Northstate Earth And Water Inc | A + HAZ | 2006 | Active |
| Northwest Homes | B + C8 | 1998 | Active |
| Nouvant Homes Inc | B | 2010 | Active |
| Obrien Shane Construction-Partnership | B | 2018 | Active |
| One Day Doors And Closets Of Northern California | B | 2026 | Active |
| One Way Development & Construction Company Inc | A, B | 1992 | Renew by Nov 30, 2026 |
| P J Construction Inc | B + C36 | 1980 | Renew by Nov 30, 2026 |
| PA - Sons Inc | B + C54 | 2005 | Active |
| Pacific Power And Engineering Inc | A + C10 | 1995 | Active |
| Paradise Interiors LLC | B | 2020 | Active |
| Parlay Investments Inc | B | 1982 | Active |
| Patrick Warren Construction Inc | B | 1994 | Active |
| Pelletier Christian Construction Inc | B | 2001 | Active |
| Perennial Construction Inc | A, B | 2022 | Active |
| Pioneer Homes Inc | B | 2020 | Active |
| Platinum Construction | B + C8 | 2003 | Active |
| Plumbline Fencing Inc | B | 2026 | Active |
| Precision Builders | A, B | 1989 | Active |
| Price Daryl Construction Inc | B | 2005 | Active |
| Probuilt Contracting | B | 2013 | Active |
| Progressive Management Enterprises Inc | B + C8, C27, C39 | 2008 | Active |
| R & D Construction LLC | B | 1987 | Active |
| R A W Construction | B + C39 | 1979 | Active |
| R M H Inc | A | 2024 | Renew by Nov 30, 2026 |
| R S S E Inc | A + C10, HAZ | 2011 | Active |
| R3 Rodriguez Remodel & Renovate LLC | B | 2026 | Active |
| Red White And Blue Builders Inc | B | 2024 | Active |
| Redding Airport Constructors | A | 2024 | Active |
| Redding Canvas Inc | B + D03 | 1988 | Active |
| Ridgeline Builders Group Inc | B | 2004 | Active |
| Rother Construction LLC | B + C12 | 2018 | Active |
| Round Rock Construction Inc | A, B | 2026 | Active |
| Rta Construction Inc | A, B + C10 | 2005 | Active |
| S & J Development Inc | B | 1991 | Active |
| S T Rhoades Construction Incorporated | A + C31 | 2009 | Active |
| Saavy Builders Inc | B | 2025 | Active |
| Salmon Creek Construction Inc | B | 2002 | Active |
| Schnetzer Engineering Inc | A | 1994 | Active |
| Self-Help Home Improvement Project | B + C10, C20, C36 | 1986 | Active |
| Shasta Building Supply LLC | B + C2, C17 | 2025 | Active |
| Shufelberger Construction Inc | A, B + C46 | 1995 | Active |
| Silverado Restoration Company Inc | B + C53 | 1991 | Active |
| Site Work Solutions | A, B + HAZ | 2006 | Active |
| Snapps Construction Inc | B | 2017 | Active |
| Snavely - Morley Construction | B | 2007 | Active |
| SNL Group Inc | A, B | 2013 | Active |
| Solid Rock Construction Inc | A | 1993 | Active |
| Stewart Engineering Inc | A, B | 2001 | Active |
| Stillwater Construction Inc | B | 2022 | Active |
| Stimpel - Wiebelhaus Associates Inc | A + HAZ | 1990 | Active |
| Stonebridge Developers | B | 2025 | Active |
| Strathman Excavating Inc | A | 2026 | Active |
| Sunrise Excavating | A + C21, HAZ | 1983 | Active |
| Synergo LLC | A | 2019 | Active |
| Taylor & Royal Corp | A | 2019 | Active |
| Trathen Michael Construction Inc | B | 1991 | Active |
| Triple Seven Excavating And Grading Inc | A | 1998 | Active |
| Tullis Inc | A | 1974 | Active |
| Ursa Engineering | A + HAZ | 2023 | Active |
| US O Building Company | B | 2012 | Active |
| Vegetative Management | A, B + ASB, C10, D49 +1 | 2018 | Active |
| Vista Point Builders Inc | B | 2022 | Active |
| Wagner Design And Build Inc | B | 2019 | Active |
| Waltons Economy Remodeling | B | 2018 | Active |
| Well Groomed Construction Inc | B | 2023 | Active |
| Whitewaters Construction Inc | B | 2022 | Active |