| Merit Framing Inc | B | 2012 | Active |
| Metal Tech Inc | B | 2009 | Active |
| Miller Regional Management Inc | B | 2021 | Active |
| Mitchell Building Group | B | 2024 | Active |
| Mitercon Construction Corp | B | 2014 | Active |
| MMJ Construction Inc | B + C10, C20, C36 | 2013 | Active |
| Morgan Construction Company Inc | B | 1989 | Active |
| Mr Fix All | B2 | 2024 | Active |
| Murrieta Development Company Inc | A + C34 | 1989 | Active |
| Nalu Construction Inc | B | 2024 | Active |
| National Commercial Builders Inc | B | 2011 | Active |
| National General Construction | B + C12, C21, D64 | 2022 | Active |
| Nervicia Construction | B | 2018 | Active |
| Nextlevel Remodels | B2 | 2026 | Active |
| O R Construction Inc | B | 2014 | Active |
| O'Neil J W Construction Inc | A, B | 2024 | Active |
| Onyx Builders Inc | B | 2024 | Active |
| P B J Enterprises Inc | B | 2005 | Active |
| Pacific Coast Development Group Inc | B | 2011 | Active |
| Pacific Construction Analysts Inc | A, B | 2004 | Active |
| Pacific Star Concrete Inc | B + C27, C53, D06 | 2022 | Active |
| Pacific West Development L P | B | 2008 | Active |
| Parkway Construction Services Inc | B + C7 | 2017 | Active |
| Paul J Construction Corp | B + C13, C34, C36 | 2005 | Active |
| Pepe John Construction Inc | B | 1976 | Active |
| Performance General Contracting | B | 2021 | Active |
| Perpetual Parks & Playgrounds Inc | A, B + D34 | 2009 | Active |
| Perrones Construction Inc | B | 2003 | Active |
| Premium Healthcare Construction | B | 2012 | Active |
| Prime Socal Remodeling Inc | B | 2026 | Active |
| Pro Team Plumbing | B + C20, C36 | 2014 | Active |
| Profusion Enterprise Inc | A, B | 2020 | Active |
| Prowess Utility Group Inc | A | 2016 | Active |
| Puroclean Restoration Experts | B | 2009 | Active |
| Purodyne Corporation | A, B + C10 | 2012 | Renew by Nov 30, 2026 |
| QC Guys | B + C10, C20 | 2012 | Active |
| Qualtech Concrete Inc | B + C8 | 2002 | Active |
| R C Grading Inc | A + C12, HAZ | 2004 | Active |
| R T N Development | B | 1976 | Active |
| R411 Construction | B | 2026 | Active |
| Rainbow International Of Temecula | B | 2020 | Active |
| Ramona Roofing Co | B + C39 | 2006 | Active |
| RDC Builder | B | 2019 | Active |
| Red Ridge Networks | B + C10 | 2024 | Active |
| Reed Family Enterprises Inc | B | 1994 | Active |
| Reliance Development And Construction Inc | B | 2019 | Active |
| Renovation Pros Restoration Services Inc | B | 2022 | Active |
| Resilient Service Solutions LLC | B | 2026 | Active |
| Revival Kitchen & Bath | B | 2025 | Active |
| Ricchio Company | A + C10 | 2022 | Renew by Nov 30, 2026 |
| Rider Restoration Services LLC | B | 2023 | Active |
| Riverside Construction Inc | B | 2024 | Active |
| RNC Construction Inc | B | 2019 | Active |
| Ross Renovations Inc | B | 2026 | Active |
| Rowland Corporation | B + C54 | 2018 | Renew by Nov 30, 2026 |
| Rysn Construction Inc | B | 2025 | Active |
| S & G Custom Builders Inc | B | 1982 | Active |
| S & S Dynasty Inc | B + C8, C27, C53 | 2013 | Active |
| S C I | B | 2001 | Active |
| S J M Construction Inc | B + C10, D03 | 1996 | Active |
| S T K Construction And Development Inc | B | 1999 | Renew by Oct 31, 2026 |
| S W Homes Inc | B | 2004 | Active |
| S&S Recons LLC | B | 2024 | Active |
| San Diego General Contractors Inc | A, B + C10, C36 | 2022 | Active |
| Saunders Electrical Construction Inc | B + C10 | 2025 | Active |
| SDS Homes Construction Corp | B | 2021 | Active |
| Sepe Construction Services Inc | B | 1990 | Active |
| Silvabuilt Homes | B | 2022 | Active |
| So - Cal Pipeline Welding Inc | A | 2004 | Active |
| Solex Contracting Inc | A, B + C10, D31 | 2004 | Active |
| Solid Contracting Inc | A | 2011 | Active |
| Southwest Concrete Structures Inc | B + C8, C50 | 2009 | Active |
| Southwest Infrastructure Inc | A + C31, C34 | 2025 | Active |
| Southworth Construction LLC | B | 2018 | Active |
| Specktrum Engineering | A, B + HAZ | 2002 | Active |
| Storlie Signs | B2 + C45 | 2008 | Active |
| Stu McIntosh Construction Inc | B | 2013 | Active |
| Sunam CM | B | 2008 | Active |
| Surefire Underground Consulting | A | 2011 | Active |
| T N T Blanchard General Engineering Inc | A | 2009 | Active |
| Tank Specialists Of California | A, B + HAZ | 1998 | Active |
| Team 1 Restoration Inc | B | 2009 | Active |
| Temecula Builders Inc | B | 2022 | Active |
| Temecula Roofing Co | B + C39 | 2006 | Active |
| Teter Scott Construction Inc | B | 1985 | Active |
| The Tradesmen | B | 2017 | Active |
| Timeless Human Construction | B | 2026 | Active |
| Titan CR Inc | B | 2024 | Active |
| Titan Restoration Inc | B | 2024 | Active |
| Top Tier Restoration LLC | B | 2023 | Active |
| Tranquility Custom Pools And Spa | B + C8, C53, D06 | 2000 | Active |
| Transform Power | B + C10 | 2019 | Active |
| Trinity Grading Incorporated | A | 2004 | Active |
| True Blue Remodeling | B | 2012 | Active |
| True North General Contracting Inc | B | 2024 | Active |
| Ubca Inc | B + C51 | 2008 | Active |
| Ultimo Organization Inc | A, B + C10 | 1977 | Active |
| Ultraflote Inc | A + C33 | 2021 | Active |
| United Building Services Inc | B + C36, D64 | 2019 | Active |
| United Underground Pipeline Inc | A | 2025 | Active |