| JW Engineering Inc | A | 2025 | Active |
| Kairos Construction | B | 2005 | Active |
| Kelco Builders Inc | B + C17 | 2024 | Active |
| Kennedy/Jenks Consultants Inc | A | 1994 | Active |
| Kip Incorporated | A | 1977 | Active |
| KLR Engineering Inc | A | 2023 | Active |
| Kontiki Construction Services | B | 2022 | Active |
| La Cresta Holdings Inc | A, B + C10, C39, C46 | 2023 | Active |
| Land Mike Construction Inc | B | 2006 | Active |
| Legacy Tile And Stone Inc | B2 + C15, C54 | 2014 | Active |
| Level Up Contracting Inc | B | 2023 | Active |
| Lions Den General Constrution Inc | B | 2025 | Active |
| LJ - 21 Construction & Design Studio Inc | B | 2024 | Active |
| Lucky Leak Plumbing | B + C8, C36 | 2014 | Active |
| M W D Specialists | B + C6 | 2006 | Active |
| Maples & Associates Inc | A, B | 1995 | Active |
| Marshman Construction Inc | B + C2, C9 | 1989 | Active |
| Matrix Construction Services | B + C10, C36 | 2006 | Active |
| McMullen Michael Enterprises Inc | B | 1988 | Active |
| Medina Renovation & Construction Inc | B | 2019 | Active |
| Miko Mountain Lion Inc | A, B | 2014 | Active |
| Mining & Development Management Inc | A | 2019 | Active |
| Moderno Inc | B + C27 | 2015 | Active |
| Moonhill Construction Inc | B | 2011 | Active |
| Morgan Brothers Construction | B | 2025 | Active |
| Murrieta Valley Construction | B | 2025 | Active |
| My Install Guy | B + C36 | 2013 | Active |
| Next Level Construction Services Inc | A, B + C8, HAZ | 2013 | Active |
| Next Level Up Remodeling LLC | B | 2026 | Active |
| Nice Restoration Inc | B | 2026 | Active |
| Nighthawk Integrated Services | A, B | 2024 | Active |
| Nootbaar Plumbing Inc | B + C4, C36 | 2021 | Active |
| Old Town Construction And Restoration | B | 2018 | Active |
| Old Town Kitchen & Bath LLC | B | 2025 | Active |
| Opes Construction Inc | B | 2017 | Active |
| Orion Construction | B | 2024 | Active |
| Orris Bryan J Flooring Inc | B + C15 | 2016 | Active |
| Oslund Electrical Services Inc | B + C10 | 2023 | Active |
| P K Mechanical Systems Inc | A | 2002 | Active |
| P Square K One LLC | B | 2017 | Active |
| Pacific Adu Builders LLC | B | 2026 | Active |
| Pacific Hydrotech Corporation | A, B + HAZ | 1987 | Active |
| Pacific Sun Technologies Inc | A, B + C2, C10 | 2007 | Active |
| Pavement Management Solutions Inc | B + C12 | 2013 | Active |
| Performance Construction | B | 2011 | Active |
| Pierre Vitalio Creations LLC | B + C6 | 1979 | Active |
| Pillar Contracting | B | 2021 | Active |
| Pinson K Stairs Inc | B | 2003 | Active |
| Pioneer Doors Frames Hardware Inc | B | 2014 | Active |
| Planet Care Innovations Inc | B + C27 | 2015 | Active |
| Precision Door & Window Company | B + C17 | 2018 | Active |
| Pro Bright Construction Inc | B + C36, C53 | 2012 | Active |
| Ram Team Contractor | B | 2016 | Renew by Nov 30, 2026 |
| Rancho Custom Builders | B | 2018 | Active |
| Raymond Renovations Inc | B | 2024 | Active |
| Re-Bath Orange County | B | 2010 | Renew by Dec 31, 2026 |
| Repair Hero | B | 2026 | Active |
| Ridgeline Construction LLC | B | 2008 | Active |
| Rivcon Construction Inc | B + C8, C27 | 2002 | Active |
| Roc Electrical | B + C10, C20 | 2019 | Active |
| Ruth Construction & Remodeling Inc | B | 2023 | Active |
| Ryan Shawn Construction Inc | B | 2009 | Active |
| S & S Interior Finish Inc | B | 2007 | Active |
| Sage Building Consultants LLC | B | 2025 | Active |
| Saint LLC | B | 2021 | Active |
| Salvatore Electric Inc | B + C10 | 2019 | Active |
| Sandoval & Sons Construction & Renovation | B | 2022 | Active |
| Santa Rosa Construction Inc | B | 2006 | Active |
| Schroeder Cary Contracting Inc | A + C57 | 1980 | Active |
| Scoys Construction Inc | B | 2017 | Active |
| Senergy | B | 2002 | Renew by Nov 30, 2026 |
| Servpro Of Murrieta Restoration & Construction | B | 2019 | Active |
| Stephens Brothers Construction | B + C6 | 2011 | Active |
| Stonecrest Custom Homes Inc | B | 2000 | Active |
| Stouse J G Constructors Inc | B | 1994 | Active |
| Stouse JG Constructors-Integrated Construction Group | B | 2023 | Active |
| Strong's Builders The | B | 2025 | Active |
| Superior Construction Concepts Inc | B | 2023 | Active |
| Superior Restoration | B | 2013 | Active |
| Supreme Restoration | B | 2024 | Active |
| T & D Trenchless | A | 2007 | Active |
| T & M Painting And Construction Inc | B + C33, C35, D06 +1 | 2002 | Active |
| T R M Construction | B + C33 | 2007 | Active |
| T W C Construction | A, B + C5, C8, C27 | 2015 | Active |
| Talion Construction LLC | B | 2015 | Active |
| Timberlake Painting | B + C2, C9, C17 +1 | 1990 | Active |
| TM Design Build | B | 2020 | Active |
| Treska Corp | B | 2024 | Active |
| Trueline Contracting | B | 2010 | Active |
| Trust Engineering | A, B | 2018 | Active |
| Unified Trades Of Construction Inc | B | 2018 | Active |
| Unity Construction Group Inc | B | 2024 | Active |
| V K Group Construction Services Inc | B | 2018 | Active |
| V M Creative Construction Inc | B + C10 | 2025 | Active |
| Valley Wide Services Inc | B | 2023 | Active |
| Van Gaale Peter & Sons Construction Inc | B | 1971 | Active |
| Velotera Services Inc | B | 2012 | Active |
| Veteran's Choice Inc | B + C20, C36, C42 | 2021 | Active |
| Villa Mesa Construction Services Inc | B | 2019 | Active |
| Voltaic Construction LLC | B + C10 | 2022 | Active |