| Magnum Contractors Of California | B2 | 2023 | Active |
| Makk Construction Inc | B | 2010 | Renew by Dec 31, 2026 |
| Malven Construction Inc | B + C10 | 1985 | Active |
| Managex | B | 2004 | Renew by Nov 30, 2026 |
| Manzil Construction Group Inc | B | 2026 | Active |
| Marc O'Polo Enterprises Inc | B + C29 | 1990 | Active |
| Mark Woodley Fire Protection Inc | A, B + C16, C36 | 2002 | Active |
| Marko Construction Group Inc | A, B + C23, C39 | 2004 | Active |
| Mass X Inc | A | 2007 | Active |
| Master Construction & Coatings Inc | B + D12 | 2014 | Active |
| Mastery Remodel Inc | B2 | 2026 | Active |
| Matthews H D Demolition & Excavation | A + C12, C21, HAZ | 2004 | Active |
| Mayfield Welding Inc | A + C60 | 1995 | Renew by Dec 31, 2026 |
| MC Caffrey Construction Inc | B | 1998 | Active |
| MC Curley And Day Masonry Inc | B + C29, C50 | 1991 | Active |
| MC Donald Gary Development Company | B | 1975 | Active |
| McCaffrey Group Inc The | B | 1982 | Active |
| Meco Inc | A + C21 | 2012 | Active |
| Meeder Equipment Company | A + C10 | 1967 | Active |
| Meyers Constructors Inc | B + C51 | 2015 | Active |
| Michael Taylor Construction LLC | B | 2020 | Active |
| Mico Construction Inc | B + D03 | 1988 | Active |
| MJR Home Inc | B | 2019 | Active |
| MKD Builders Inc | B + C9 | 2022 | Active |
| MKS Electric LLC | B + C10 | 2001 | Active |
| MLS Construction | B | 2025 | Active |
| Mnatafji Construction | B | 2019 | Active |
| Mobile One Construction Inc | B | 2020 | Active |
| Momentum Services Corporation | A, B | 2004 | Active |
| Monarch Renovations LLC | B | 2021 | Active |
| Montano's Construction Inc | B | 2025 | Active |
| Monterey Homes | B | 2009 | Active |
| Moren Industrial Metals Inc | B + C20, C43 | 1994 | Active |
| Na General Contracting | B | 2025 | Active |
| Nation Builder LLC | A, B + C8 | 2023 | Active |
| Nelson - Mora Construction Inc | B + C33 | 2016 | Active |
| Nelsy Construction | B | 2017 | Active |
| Nesm / Webcor A Joint Venture | A, B | 2018 | Active |
| New Century Builders Inc | B | 2010 | Renew by Nov 30, 2026 |
| New England Sheet Metal And Mechanical Co | A, B + C4, C20, C36 +3 | 1983 | Active |
| New Millennium Builders Inc | B | 2010 | Active |
| Nexgeneral Construction LLC | B | 2021 | Active |
| Next Built | B + C20 | 2018 | Active |
| Nolan Thomas Inc | B | 1979 | Active |
| Northstar General Inc | B | 2003 | Active |
| Nuvole Company | B | 2021 | Active |
| Ockey Construction | B + C10 | 1981 | Active |
| Olsen Construction And Restoration Co | B | 1986 | Active |
| On Point Grading & Paving Inc | A | 2017 | Renew by Nov 30, 2026 |
| Oso Holding Group LLC | B + C10 | 2025 | Active |
| Pacific Engineering And Consulting Inc | A + HAZ | 2016 | Active |
| Pacific Image Builders Inc | B | 2002 | Active |
| Pacific Industrial Constructors Inc | A | 1995 | Active |
| Paden & Bletscher Construction Inc | B | 2012 | Active |
| Pannu Construction Inc | B | 2015 | Active |
| Panos Engineering Construction | A + C8 | 2023 | Active |
| Paragon Industries Inc | B + C54, D34 | 1974 | Active |
| Paramount Home Development | B | 1988 | Active |
| Paramount Restoration And Construction | B | 2017 | Active |
| Parc Environmental | A, B + ASB, C21, C22 +3 | 1986 | Active |
| Parker Brian Construction Inc | B | 2004 | Active |
| Parley And Sons Construction Inc | B | 2023 | Active |
| Patton Air Conditioning | B + C4, C10, C20 +3 | 1969 | Active |
| Pax Domus Inc | B | 2017 | Active |
| Peoples' Choice Paving Inc | A | 2018 | Active |
| Performance Grading Inc | A | 2008 | Active |
| Phoenicia Builders Incorporated | B | 2003 | Active |
| Pickett & Sons Construction Inc | B | 1973 | Active |
| Pickett Solar Construction | B | 1988 | Active |
| Pierce Painting & Construction Inc | A, B + C33 | 2023 | Active |
| Pinnacle Remodeling And Renovations Inc | B2 | 2025 | Active |
| Pocket Home Professionals | B | 2021 | Active |
| Powers Construction | A, B + C51, HAZ | 2009 | Active |
| Prestige Construction & Development Inc | B + C6 | 1989 | Active |
| Prime Revival Construction | B | 2025 | Active |
| Proline Services | B + C10, C36 | 2025 | Active |
| Puma Construction & Restoration Co | B | 1978 | Renew by Nov 30, 2026 |
| Pure Diamond Constructions | B | 2022 | Active |
| Quality Electric Contractors Inc | B + C7, C10 | 1972 | Active |
| Quality General Contracting Inc | B | 2017 | Active |
| Quality Real Builder Inc | B | 2025 | Active |
| Quantum Fire Protection Systems | B + C10, C16 | 2008 | Active |
| Quiring | B | 2012 | Active |
| R & M Consulting & Construction Of California LLC | A, B | 2025 | Active |
| R E Mason Paving Engineering Inc | A + C12 | 2020 | Active |
| R J Cook Construction LLC | B | 2025 | Active |
| R N G Construction Inc | B | 2017 | Active |
| R T Diversified Inc | B + C34 | 2009 | Active |
| Rad Construction Management Inc | A + C12 | 2025 | Active |
| Rainbow International Of East Fresno | B | 2025 | Active |
| Rakkar Development & Construction | B | 2018 | Active |
| Rapid Results Construction Inc | B | 2026 | Active |
| Raven Development | B | 2000 | Active |
| Ray Fisher Home Access LLC | B | 2024 | Active |
| Rayzon Corporation | B | 2010 | Active |
| RB Solutions Inc | B + C10 | 2010 | Active |
| Re-Gen Electric Inc | B + C10, C46 | 2019 | Active |
| Reliant Access Engineering | A | 2026 | Active |
| Retrospec Homes Inc | B | 2021 | Active |
| Revere Builders Inc | A, B + C8 | 2025 | Active |