| Solar Power Installation And Construction | B | 2015 | Active |
| Solepacific | B + C16 | 2015 | Active |
| Sons Of Thunder Painting The West | B + C33 | 2022 | Active |
| Sorcias Builders Of Pacific | B | 2025 | Active |
| Source One Contracting Inc | B + C36 | 2009 | Active |
| South Coast Facility Services | B + C4, C10, C20 +1 | 2005 | Active |
| South St Investments LLC | B + C10, C20, C38 +1 | 1984 | Active |
| Southshore Homes LLC | B | 2020 | Active |
| Specialized Environmental Inc | B + ASB, C21, C22 | 1995 | Active |
| Specialty Siding | B + C17, D03, D24 +2 | 1992 | Active |
| SPS Inc | B | 1975 | Active |
| Stmco Construction | B + D34 | 2017 | Active |
| Stone Age | B + C6, C54 | 2001 | Active |
| Studs Building And Construction Co | B | 2026 | Active |
| Summit Construction & Restoration Inc | B | 2022 | Renew by Nov 30, 2026 |
| Sunco Construction | B | 2005 | Active |
| Suncrest Construction & Repairs | B | 2021 | Active |
| Sunset Construction Company | B + C9 | 2013 | Active |
| Swank Interiors Inc | B | 2014 | Active |
| Systems X T Inc | B + C10, C20, C38 | 2004 | Active |
| T L Construction And Design Group Inc | B | 2016 | Active |
| Tag Design Build Inc | B + C33 | 2026 | Active |
| Tak Builders Inc | B | 2024 | Active |
| Tarasco Apex Builders Inc | B | 2026 | Active |
| Technick Construction | B | 2008 | Active |
| Techno Coatings Inc | B + C33, D06 | 1974 | Active |
| Tectra Construction Inc | B | 2025 | Active |
| Tetras Construction Corporation | B | 1991 | Active |
| THC Builders | B + C15 | 2016 | Renew by Nov 30, 2026 |
| The Builder Group LLC | B | 2025 | Active |
| The Tile Brothers | B + C54 | 2020 | Active |
| Thorpe Construction Inc | B | 1989 | Active |
| Three Point Builders LLC | B | 2026 | Active |
| Timeproofusa | B + C10, C39, C46 | 2024 | Active |
| Titan Construction | B + C21 | 2021 | Active |
| Titan Mechanical Services Inc | B + C20 | 2007 | Renew by Dec 31, 2026 |
| Titanium Restoration Services Inc | B | 2022 | Active |
| Tnis Systems Inc | B + C7, C10, D52 | 2013 | Renew by Nov 15, 2026 |
| Today's Construction Inc | B | 2020 | Active |
| Tony's Constructions | B + C36 | 2023 | Active |
| Top Beam General Contractor | B | 2019 | Active |
| Top Drawer Construction Inc | B | 1995 | Active |
| Tri Star Construction & Restoration Services Inc | B | 2012 | Renew by Dec 31, 2026 |
| Tri-Tower Inc | B | 1986 | Active |
| Tristone Builders Inc | B | 2023 | Active |
| Tuff Kote Systems | B + C33 | 2013 | Active |
| Turner Construction Company | A, B | 1962 | Active |
| Twi - Techno West Inc | A, B + C33 | 1979 | Active |
| Tyrena & Co Inc | B | 2024 | Active |
| Universal Demolition | B + C21, C22 | 2021 | Active |
| Universal Industrial Sheet Metal | B + C8, C20, C43 +1 | 1984 | Active |
| USA Builders & Construction Inc | B | 2018 | Active |
| V & M Design And Construction Inc | A, B + C10 | 2006 | Active |
| V - Corp Contracting Services Inc | B | 2007 | Active |
| Valin Construction Inc | B | 2026 | Active |
| Valoren | B + C17 | 2016 | Active |
| Vanguard Underground Engineering | A | 2026 | Active |
| VCP Victory Construction Partners Inc | B | 2024 | Active |
| Veterans Engineering Services Inc | A | 2016 | Active |
| Vicon Enterprise Incorporated | A + C16 | 2021 | Active |
| Victory Home Service Inc | B + C20 | 2020 | Active |
| Viking Environmental Group | B + ASB, C22, HAZ | 2013 | Active |
| Villalba Remodeling & Construction | B | 2025 | Active |
| Vinco Construction Corporation | B | 1978 | Active |
| Vision Adu LLC | B | 2024 | Active |
| Vision Restoration Contractors Inc | B | 2018 | Active |
| W S Klem Contractor Incorporated | B + C5 | 1997 | Active |
| Walker Brothers Services LLC | A | 2024 | Active |
| We Kan Do It Construction Inc | B | 2018 | Active |
| West Coast Arborists Inc | A, B + C21, C27, C31 +2 | 1978 | Renew by Dec 31, 2026 |
| West Coast Construction & Restoration Co | B | 2023 | Active |
| West Coast Contractors Inc | B + C2, C9, C35 | 2025 | Active |
| West Coast General Construction | B + C17 | 2026 | Active |
| West Jin Entrance System Inc | B2 + C17, D28 | 2017 | Active |
| Western E Group | B + C10 | 2012 | Active |
| Western Engineering Construction And Facilities Inc | A, B + C10, C15, C16 +3 | 2013 | Active |
| Western Exterminator Company | B | 2015 | Active |
| White Truck Construction Inc | B | 2026 | Active |
| Willdan Constructors | B | 2008 | Active |
| Willdan Consulting | B | 2011 | Active |
| Willdan Energy Solutions | A, B + C10 | 2020 | Active |
| Williams Construction Services LLC | B | 2023 | Active |
| Wilson & Hampton Painting Contractors | B + C33, D34 | 1954 | Active |
| Wolfpack Mechanical Inc | B + C10, C20, C38 | 2018 | Active |
| Worldwide Construction Services Inc | A, B + C17, C33 | 2006 | Active |
| XPRT Builders Inc | B | 2019 | Active |
| XS Construction Group Corp | B | 2021 | Active |
| Yc Remodeling | B2 | 2023 | Active |
| Zarazua Construction Inc | B | 2018 | Active |