| Crone James & Associates Inc | B | 2010 | Active |
| Cruz Construction And Development Inc | B | 2011 | Active |
| Cruz Custom Homes Inc | B | 2026 | Active |
| Curtis Drilling Co | A + C57, D09 | 1991 | Active |
| Cyra Design Build | B | 2018 | Active |
| D & S Construction Co | B | 1981 | Active |
| D C C General Engineering Contractors Inc | A, B + C8 | 1982 | Active |
| D G 2 Epoxy | B2 + D12 | 2022 | Active |
| D L T Remodeling | B2 + C54 | 2020 | Active |
| D M I Builders Inc | A, B | 1981 | Renew by Nov 30, 2026 |
| D'Amato Construction Company | B + C33 | 2022 | Active |
| DC Smith Construction | B | 2015 | Renew by Nov 30, 2026 |
| Delgado Carlos Construction Inc | B | 2022 | Active |
| Delta Plumbing S D Inc | A, B + C36 | 2008 | Active |
| Design Build Unlimited LLC | B | 2026 | Active |
| Desma Construction Co | B | 2021 | Active |
| Deubig James Construction Inc | B | 2003 | Active |
| DJ General Building And Masonry Inc | B + C29 | 2017 | Active |
| Don Wolf Construction & Remodeling Co | B2 | 2024 | Active |
| Double Play Industries Inc | B + C17 | 2010 | Active |
| Downstream Services Inc | A + C31, HAZ | 2002 | Active |
| Drain Boss | B + C9, C36, D64 | 2003 | Active |
| Dream Catcher Construction Inc | B | 2024 | Active |
| Dreyfuss Grading | A, B + C8, C12 | 2022 | Active |
| Drown West Construction Services Inc | B | 2022 | Renew by Dec 31, 2026 |
| Eagle Construction & Engineering LLC | A, B | 2018 | Active |
| Eagle Ridge Builders LLC | B | 2021 | Active |
| Earth Care Pools | A, B + C27, C53, D28 | 2017 | Active |
| Earth Tek Construction Inc | B + C53 | 2015 | Active |
| El Camino Builders | B | 2025 | Active |
| El Dorado Paving Company Inc | A | 2022 | Active |
| Elevated Inspections LLC | B | 2025 | Active |
| Eleven Western Builders Inc | B | 1983 | Active |
| Emblem Builders | B | 2025 | Active |
| Emilio & Sons Inc | B | 1971 | Active |
| Empire Builder Corps | B | 2024 | Renew by Dec 31, 2026 |
| Empire General Construction Inc | B | 2025 | Active |
| Engarchi Inc | B | 2026 | Active |
| Engineered Mechanical Services Inc | B + C4, C20 | 2002 | Renew by Nov 30, 2026 |
| Equitee Contracting Inc | B | 2024 | Active |
| Erickson-Hall Construction Co | A, B + HAZ | 1998 | Active |
| Evergreen Distributors Inc | A + C27 | 1985 | Active |
| Executive Construction & Remodel | B | 2020 | Active |
| Expert Kitchen Designs | B2 | 2025 | Active |
| Ez Design And Builders Inc | B | 2025 | Active |
| Faith At Work Construction | B | 2024 | Active |
| Filanc | A, B + C10 | 1952 | Active |
| Filanc / Big Sky Electric A Joint Venture | A + C10 | 2009 | Active |
| Filanc Brown & Caldwell Joint Venture | A | 2018 | Renew by Nov 30, 2026 |
| Filanc-Acciona Desal Partners | A | 2024 | Renew by Nov 30, 2026 |
| Fine Finish Factory Inc | B + C6 | 1987 | Active |
| First Choice Home Improvements Inc | B | 2009 | Active |
| Fitzgerald Electrical Services Inc | A + C10 | 2003 | Active |
| Five Star Construction Services Corporation | B | 2021 | Active |
| Five Stripes General Construction | B | 2019 | Active |
| Flat Top Grading Inc | A | 2010 | Active |
| Fox General Contracting LLC | B | 2026 | Active |
| Francis E Sabato Electrical Contractor Inc | B + C10 | 1992 | Renew by Nov 30, 2026 |
| Fredricks Company Inc | B | 1976 | Active |
| Freedom Solar | B + C10, C46 | 2016 | Active |
| Freeland Construction | B | 2025 | Active |
| Funderburk Construction Inc | B | 1984 | Active |
| G M General Construction Inc | B + C5 | 2013 | Active |
| G S C Concrete Construction Inc | B + C8 | 1998 | Active |
| G S C Contracting Inc | B + C8 | 2004 | Active |
| Galvanized Construction Inc | B | 2018 | Active |
| Gaudet Flip Construction Inc | B | 1988 | Active |
| Gci Roofing | B2 + C39, C43, C46 | 2020 | Active |
| Geotad Construction Inc | B | 2016 | Active |
| Geotechnical Stabilization Inc | A + D30, D43 | 1981 | Active |
| Geranium Street USA Inc | B | 2010 | Active |
| Golden Dreams Development Inc | B | 1995 | Active |
| Golden Poppy Homes | B | 2024 | Active |
| Golden West Drywall | B + C9 | 2013 | Active |
| Goldstone Construction Group | B | 2025 | Active |
| Govari Cabinets Unlimited Inc | B + C6 | 2006 | Active |
| Graff Co Inc | B | 2026 | Active |
| Grand West Associates Inc | B | 1992 | Active |
| Granite Transformations NSD | B + C54 | 2003 | Active |
| Grawco Engineering Inc | A | 2026 | Active |
| Green Builders General Contractors (Gbgc) Corporation | B | 2018 | Renew by Nov 30, 2026 |
| Greene R A Corporation | B + C9, C35 | 1983 | Active |
| Greyhound General Inc | B | 2004 | Renew by Nov 30, 2026 |
| Ground Service Technology Inc | A, B + C10, C27 | 2004 | Active |
| H P C | B | 2005 | Active |
| Haas Home Remodeling Inc | B | 2020 | Active |
| Haines M S Construction Inc | B | 1987 | Active |
| HCC Engineering Inc | A | 2026 | Active |
| Hedges Inc | B | 1995 | Active |
| Heritage General Contractors Inc | A, B | 2013 | Active |
| Hidden City Pro Builders Inc | B | 2019 | Active |
| Hidden Valley Pipeline Inc | A | 2002 | Active |
| Highland Construction Company | B | 2005 | Active |
| Home Expressions By Jackson Design & Remodeling | B + C33 | 2015 | Active |
| Hutton Contracting Corp | B + C20 | 2024 | Active |
| I E-Pacific Inc | A, B | 1993 | Active |
| I S H General Contractor Inc | B | 2014 | Active |
| Il Total Design And Build | B | 2019 | Active |
| Imperial Valley Construction Inc | B | 2024 | Renew by Dec 31, 2026 |
| Infinity Construction Engineering Inc | A | 2016 | Renew by Dec 31, 2026 |