| Raw Welding Inc | A + C51, C60, D39 | 2021 | Active |
| RCJ Construction Services Inc | B | 2025 | Active |
| RD Construction Corp | B | 2017 | Active |
| Remedial Transportation Services Inc | A + C21, D49, HAZ | 2004 | Active |
| Revamp Construction | B | 2025 | Active |
| Reyneveld Enterprises Inc | B + C8 | 1983 | Active |
| RGF Properties Inc | B | 2022 | Active |
| Rimer Homes Inc | B + C47 | 2007 | Active |
| Rio Bravo Construction Inc | B | 2026 | Active |
| Rival Well Services Incorporated | A + C57 | 2007 | Active |
| RM Construction Design & Build LLC | B + C6 | 2015 | Active |
| RNS Construction LLC | B | 2011 | Active |
| RNS Contractors Inc | B + C9 | 2021 | Active |
| Roberson Homes | B | 2016 | Active |
| Robert Heely Inc | A | 1979 | Active |
| Rock Bottom Inc | A + C27, C53 | 1992 | Active |
| Rodriguez & Perez Construction LLC | B | 2024 | Active |
| Rosedale Concrete Construction Inc | B + C8 | 2011 | Active |
| Rosedale Homes Inc | B | 2018 | Active |
| RPN Builders Inc | B | 2021 | Active |
| Russo Construction Inc | B + C45 | 1999 | Active |
| Rymac General Contracting Inc | B | 2016 | Active |
| S & L Building | B + C8 | 2016 | Active |
| S And S Contracting | A | 2023 | Active |
| S&B Sons Inc | A, B | 2012 | Active |
| Sabaloni Construction | B + C10 | 1987 | Active |
| Sanborn Shane Construction Inc | B | 2018 | Active |
| Sandex Construction Inc | A | 2025 | Active |
| Sandoval Construction & Excavation Inc | A | 2008 | Active |
| Santos Builders Inc | B | 2025 | Active |
| Savi Construction LLC | B + C15 | 2024 | Active |
| Schroeder & Son's Maintenance Services | B | 2023 | Active |
| Sclafani Construction Services LLC | A + HAZ | 2025 | Active |
| Seeker Construction Inc | A | 2026 | Active |
| Sequoia Custom Framing Inc | B | 2000 | Active |
| Service Master Restoration Services On Call | B | 2017 | Active |
| Servicemaster At Bakersfield | B | 2010 | Active |
| SG Building Services | B | 2024 | Active |
| Sierra Construction & Excavation Inc | A | 1999 | Active |
| Sierra Recycling & Demolition Inc | A + C21 | 2006 | Active |
| Signature I Corporation | B | 2000 | Active |
| Simmons Construction Inc | A, B + C8, C21 | 1996 | Active |
| Slater Plumbing & Mechanical Inc | B + C4, C16, C36 | 1998 | Active |
| SMP Construction LLC | B | 2008 | Active |
| Socal Construction | B + C39 | 2016 | Renew by Dec 31, 2026 |
| Sol Home Repairs And Construction LLC | B | 2026 | Active |
| Solar On | B + C46 | 2020 | Active |
| Solid Integrity Concrete LLC | B | 2024 | Active |
| Solidground Construction By Ramirez LLC | B | 2026 | Active |
| Soliz Construction Inc | B | 2019 | Active |
| Son Light Inc | B + C10, C46 | 2007 | Active |
| Soper Homes | B | 2016 | Active |
| Soper Luigi & Co General Contracting | B | 2022 | Renew by Nov 30, 2026 |
| South Valley Contractors Inc | A, B | 2013 | Active |
| South Valley Pump & Drilling | A + C10, C57, D09 +1 | 1981 | Active |
| South Valley Tech Services | A + C10, C57, D09 +1 | 2018 | Active |
| Sovereign Environmental Services Inc | B + ASB | 2020 | Active |
| Spartan General Construction Inc | B | 2021 | Active |
| Specialized Cleaning Technologies Inc | B2 + ASB, D63 | 2003 | Active |
| Stabile Co Construction Inc | B | 2019 | Active |
| Staples Energy | B + C10, C20, C36 | 2007 | Active |
| Steel Building Solutions Inc | B | 2006 | Active |
| Steelhead Industries | A | 2007 | Active |
| Stellar Construction Inc | A, B + C8 | 2000 | Active |
| Stockdale Construction LLC | B | 2023 | Active |
| Stone Summit Construction Inc | B | 2026 | Active |
| Stop Restoration Bakersfield | B | 2023 | Active |
| Structure Cast | B + C8, C13 | 2000 | Active |
| Structure Design & Build Inc | B | 2026 | Active |
| Sturgeon Services International Inc | A + ASB, C21, C22 +5 | 1984 | Active |
| Sunrise Mechanical Contractors Inc | A | 2012 | Active |
| Sunset Construction | B + C10, C20 | 1997 | Active |
| Sunset Mechanical & Construction Inc | B + C10, C20, C36 +2 | 1990 | Active |
| Superior Builder Construction Inc | B | 2026 | Active |
| Superior Construction | A, B + C21, C33 | 1991 | Active |
| Superior Roofing Inc | B + C39 | 2005 | Active |
| Supreme Courts Construction | B | 2021 | Active |
| Surebuilt | B | 2018 | Active |
| SW Construction Inc | A, B + C8 | 2012 | Active |
| Sweaney Custom Homes | B | 1992 | Active |
| Sweaney Inc | B + C9, C33, C35 | 1992 | Active |
| Sweaney Paint & Drywall Inc | B + C9, C33, C35 | 2012 | Active |
| Swift Construction Inc | B | 2023 | Active |
| Synergy Construction & Development Corp | A, B | 2022 | Active |
| T And C Construction | B | 1993 | Active |
| T I Services Inc | B + D34 | 1986 | Active |
| T M J Construction Inc | B | 2016 | Active |
| Target Oilfield Services | A + D09 | 1989 | Active |
| Taylor Drilling | A | 2011 | Active |
| Taylor Electric And Control Services Inc | A + C10 | 2021 | Active |
| Taylor S D Equipment Company Inc | A | 1999 | Active |
| Tekton Power And Technology | A, B | 2021 | Active |
| Tele Inc | A, B | 1998 | Active |
| Ten West Environmental | A + HAZ | 2025 | Active |
| Terraserve Inc | A + C12, C57, HAZ | 2019 | Active |
| Terrasun Construction | B + C10 | 2025 | Active |
| The Bakersfield Contractor LLC | B | 2024 | Active |
| Thompson Tank And Construction Inc | A | 2014 | Active |
| Thresher Construction Inc | B | 2006 | Active |
| Tim Nguyen Construction | B | 2026 | Active |