| M C K Services Inc | A + C12, C32 | 2000 | Active |
| Madden Engineering | A | 2026 | Active |
| Mainline Builders Inc | B | 2019 | Active |
| Marcom Innovations Contracting | B | 2024 | Active |
| Mares & Dow Construction & Skylights Inc | B + C10 | 1991 | Active |
| Mars Construction And Remodeling | B | 2023 | Active |
| Martinez Stair Company Inc | B | 2004 | Renew by Oct 31, 2026 |
| Matrix HG Inc | B + C4, C10, C20 +3 | 2002 | Active |
| MC Curley's Floor Center Inc | B + C15, C54 | 1990 | Active |
| McE Corporation | A, B + C8, C12, C27 | 1983 | Active |
| MDC Builders Inc | B + ASB | 2017 | Active |
| Metabuilt Construction LLC | B | 2024 | Renew by Nov 30, 2026 |
| MH Nissi Builders Inc | B | 2022 | Active |
| Mia Remodeling Inc | B | 2025 | Active |
| Michael M Construction Inc | B | 2017 | Active |
| Montoya's Construction Inc | B | 2017 | Active |
| Mor Construction Inc | B | 2017 | Active |
| Morang Development Group Inc | B | 2026 | Active |
| Myfort Corp | B | 2021 | Active |
| N V Heathorn Co | A, B + C2, C4, C7 +11 | 1999 | Active |
| National Building Specialties LLC | B | 2023 | Active |
| Nextenergy | A, B | 2005 | Active |
| Nextphase Builders Inc | B | 2026 | Active |
| Nova Construction Inc | B | 2026 | Active |
| O'Ryan Construction Solutions Inc | B | 2023 | Active |
| Oak Knoll Vertical LLC | B | 2024 | Active |
| Old Town Contractors Inc | B + C39 | 2014 | Active |
| One Stop Remodel And Building | B | 2016 | Active |
| Ortiz Group LLC The | B | 2023 | Active |
| P V Construction Inc | B | 2024 | Active |
| Pacfic State Paving | A, B | 2026 | Active |
| Pacific - Mountain Contractors Of California Inc | A, B | 2008 | Active |
| Pacific Coast Reconstruction & Building Inc | A, B + C9 | 1992 | Active |
| Palazzo Kitchens And Baths Inc | B + C15, C54 | 2011 | Active |
| Pantheon Design And Construction | B | 2007 | Active |
| Paragon Roofing & Remodeling Inc | B + C39 | 2023 | Active |
| Pedroni & Company | B | 2004 | Active |
| Philco Building Maintenance Inc | B | 2010 | Active |
| Pittsburg Black Diamond Builders | B | 2002 | Active |
| PR Construction Group LLC | B2 | 2026 | Active |
| Preferred Plumbing & Drain | A + C36 | 2004 | Active |
| PSR West Coast Builders Inc | B + C10 | 2008 | Active |
| Pythagoras Construction LLC | B | 2024 | Active |
| Quality Food Service Construction Inc | B + C10 | 2009 | Active |
| R G C Construction Inc | B | 2020 | Active |
| R G M And Associates | B | 1987 | Active |
| R S Company | B | 1983 | Active |
| R W B Painting And Construction Inc | B + C33 | 2021 | Active |
| Raaz Construction | B | 2022 | Active |
| Radessen Construction & Design LLC | B | 2021 | Active |
| Ram's & Sons Construction Inc | B | 2025 | Active |
| Ramirez Tom C Construction Co Inc | B | 1983 | Active |
| Reconstruction Services | B + C35, C43 | 2000 | Active |
| Red White & Blue Construction Inc | B | 2022 | Active |
| Redeemed Construction Inc | B | 2023 | Active |
| Remcon Inc | B | 1993 | Active |
| Rivera Home Service | B | 2024 | Active |
| RS Painting Inc | B + C33 | 2005 | Active |
| RS Woodbridge A Joint Venture | B | 2024 | Active |
| Ruiz FR Inc | B | 2018 | Active |
| S E A M Construction Inc | B | 2023 | Active |
| Sak Builders Inc | B + C8 | 2022 | Active |
| Saki Brothers Inc | B + C20 | 2023 | Active |
| Sausal Corporation | B | 1973 | Active |
| Schaefer Construction LLC | B | 2025 | Active |
| Schicker Luxury Bath | B | 2008 | Active |
| SDM Construction Group Inc | B | 2026 | Active |
| Seecon Financial & Construction Co Inc | A, B | 1985 | Active |
| Seecon Homes Inc | B | 2015 | Active |
| Seeno Albert D Construction Co | A, B | 1969 | Active |
| Seeno Jacqueline M Construction Co Inc | B | 2016 | Active |
| Sierra Bay Contractors Inc | A, B | 1997 | Active |
| Simple Pavers Inc | B + D06, D34 | 2007 | Active |
| Sinclair Construction Co Inc | B + C15 | 1998 | Active |
| Skyvision Construction Inc | B | 2024 | Active |
| Slovan Construction Inc | B | 2012 | Active |
| Smart Building Inc | B + C8, C33 | 2006 | Active |
| Smith Chad Construction Incorporated | B | 2010 | Active |
| Solo Building Incorporated | B | 2004 | Active |
| Square Level Plumb Inc | B | 2009 | Active |
| SRK Builders LLC | B + C10 | 2025 | Active |
| Stealth Enterprises Inc | B | 2016 | Active |
| Steen Construction Inc | B | 1996 | Active |
| Sullivan Construction Company Inc | B | 2000 | Active |
| Sunia Construction Inc | B + C10, C20 | 2020 | Active |
| Superior Window Works | B + C17, D41 | 2005 | Active |
| Swinerton / Webcor JV | A, B | 2018 | Active |
| Swinerton Builders | A, B + ASB, C2, C4 +14 | 1929 | Active |
| Swinerton Builders & Power Engineering A Joint Venture | A, B + HAZ | 2017 | Active |
| Swinerton Energy Inc | A | 2024 | Active |
| Swinerton Management & Consulting LLC | B | 2026 | Active |
| Swinerton Rubecon Joint Venture | A, B | 2021 | Active |
| T E P S | B + C10, C20 | 2003 | Active |
| Taragano Design And Build | B | 2025 | Active |
| Terrasur Corporation | B + C27 | 2016 | Active |
| Thunder Legacy Builders Inc | B | 2022 | Active |
| Tice Valley Electric Inc | B + C10 | 2008 | Active |
| Tier 1 Construction | B | 2024 | Renew by Oct 31, 2026 |
| Timberlab Inc | B | 2021 | Active |
| TNH Development LLC | A, B + C10 | 2019 | Active |