| Counterpoint Construction Services Inc | B | 1981 | Active |
| Cromwell Construction & Management Inc | B | 2008 | Active |
| Cunningham Electric & Construction Inc | B + C10 | 1995 | Active |
| Custom Building Services Inc | B | 2026 | Active |
| D N L Builders Inc | B | 2006 | Active |
| D T C Builders Inc | B | 2006 | Active |
| Dana Kitchens & Associates Inc | B + C2, C8 | 1998 | Active |
| Davis Daniel O Inc | A + C21 | 1982 | Renew by Dec 31, 2026 |
| DD Builders | B | 2023 | Active |
| De Rutte Company Builders Inc | B | 2000 | Active |
| Deangelis Construction Inc | B | 1972 | Active |
| Del Development Inc | B | 1987 | Active |
| Deluxe Shotcrete & Concrete Construction | A + C8 | 2002 | Active |
| Desjardins Construction | A | 2021 | Active |
| Dewitte Construction Inc | B | 2003 | Active |
| Diangson J Remodel Inc | B | 2016 | Active |
| Disa Construction | B | 2025 | Active |
| DMR Builders | A, B | 2017 | Active |
| Drady George Contractor Inc | B | 1979 | Active |
| Dream Builders Of Santa Rosa Inc | B | 1984 | Active |
| Drew Underground Construction | A + C42 | 1985 | Active |
| Duraline Construction Inc | B | 2017 | Active |
| E G Paving Construction Inc | A + C12 | 2020 | Renew by Dec 31, 2026 |
| Eba Engineering | A + HAZ | 1993 | Active |
| Eckstein Restoration Company | B | 2026 | Active |
| Ecos Land Services Inc | B + C2 | 2025 | Active |
| Elite Concrete Construction Inc | B + C8 | 2017 | Active |
| Elj Construction | B | 2022 | Active |
| Emj Builders Inc | B | 2005 | Active |
| Empire Construction And Engineering Co Inc | A, B | 1996 | Active |
| Endless Creations Corporation | B | 2025 | Active |
| Enos Logan Construction Inc | B | 2018 | Active |
| Eon Builders Inc | B | 2020 | Active |
| Evans Construction Inc | B | 2017 | Active |
| Facility Development Company LLC | B | 1999 | Active |
| Fairway Custom Cabinet Corp | B | 2020 | Renew by Dec 31, 2026 |
| Fairweather & Associates Inc | B | 1992 | Active |
| Farr Construction Co | A, B | 1983 | Active |
| Farrow Commercial Inc | B | 2003 | Active |
| Finley Contracting | B | 2016 | Active |
| Fire Safety Supply Inc | B + C16 | 2000 | Active |
| Firebrand Electric | B + C10 | 2020 | Active |
| Fitzgerald E Inc | B + C10 | 2014 | Active |
| Fixture - Pro Inc | B + C6 | 1998 | Active |
| Flahavan Construction Inc | B | 2021 | Active |
| Flores's General Construction Incorporation | B | 2021 | Active |
| Focal Point Construction | B | 2022 | Active |
| Fondare Finish Construction Inc | B | 2015 | Active |
| Fragoso Home Repair And Remodel Inc | B | 2023 | Active |
| Free Enterprises | B + C39 | 1999 | Active |
| FS Construction | B | 2026 | Active |
| Futrell Sonoma Corporation | B | 2025 | Active |
| G Building And Design Inc | B | 2025 | Active |
| G C C I Inc | B | 1996 | Active |
| Gaddis Construction | B | 2003 | Active |
| Gateway Builders Inc | B | 2013 | Active |
| Ghilotti Construction Company Inc | A + C8, C12, C21 +2 | 1992 | Active |
| Global Impact Construction Inc | B + C47 | 2013 | Active |
| Golden State Plumbing Nor Cal | B + C36 | 2004 | Active |
| Golden State Pro Structural Framing | B | 2022 | Active |
| Gonzalez Custom Construction Inc | B | 2025 | Active |
| Goodman Construction And Electrical Inc | B + C10 | 1990 | Active |
| Gossner Construction Inc | A | 2026 | Active |
| Gre Builders Inc | B | 2025 | Active |
| Grey Enterprises Inc | B | 2026 | Active |
| Grice Inc | A, B + C47 | 1996 | Active |
| Groundswell Management Inc | B | 2020 | Renew by Dec 31, 2026 |
| Guerra Construction LLC | B | 2005 | Active |
| Guerra Electric & Construction Inc | B + C10, C16, C20 +1 | 2024 | Active |
| Gutierrez R Construction Inc | B | 2015 | Active |
| H Bear Builders Inc | B | 2025 | Active |
| Habitat For Humanity Sonoma County | B | 2013 | Active |
| Hancock Richard Inc | B | 1984 | Active |
| Handy Her | B | 2025 | Active |
| Hannan Construction LLC | B + C9 | 2022 | Active |
| Hardstone Construction LLC | B | 2024 | Active |
| Harvest Electric Company Inc | B + C10 | 2015 | Active |
| HCB Construction | B, B2 + C47 | 2024 | Active |
| Hernanbocc Construction LLC | B | 2024 | Active |
| Holly Construction Inc | B | 1998 | Renew by Dec 31, 2026 |
| Howard Construction Inc | B + C39, C53 | 2004 | Active |
| Hugh Futrell Corporation | B | 2006 | Active |
| Hyper Pro Resource & Equipment Inc | A | 2026 | Active |
| HZL Home Inc | B | 2018 | Renew by Nov 30, 2026 |
| I N I Construction | B | 2019 | Active |
| Icse Pro Builders LLC | B | 2025 | Active |
| Industrial And Commercial Electric Inc | B + C10 | 2011 | Active |
| Infinite Construction & Remodeling | B | 2024 | Active |
| Intercontinental Civil Engineering Estimators | A | 2025 | Active |
| Iron Oak Construction | B | 2018 | Active |
| Ironwood Alliance Inc | A, B | 1981 | Active |
| J & J McAlister Inc | B | 2001 | Active |
| J D Jones Construction Inc | A | 2019 | Active |
| J L Builders | B | 2002 | Active |
| J L Modular Inc | B | 2004 | Active |
| J Ruiz Builders LLC | B | 2026 | Active |
| Jaw Inc | A + C27 | 2021 | Active |
| Jeffco General Engineering Inc | A + HAZ | 2019 | Active |
| Jireh Maintenance & Construction Inc | B + C47 | 2025 | Active |
| JL Construction, Inc | B | 1999 | Active |