| 3 Strikes Construction Inc | B | 2022 | Active |
| 559 Construction | B + C15, C54 | 2022 | Active |
| 7th Heaven Construction Co | B | 2021 | Active |
| 8a-concrete & Construction Inc | B | 2025 | Active |
| 911 Plumbing & Electric Inc | B + C10, C20, C36 +1 | 2019 | Active |
| 99 Properties Inc | B | 2017 | Active |
| A & A Construction And Remodeling Inc | B | 2025 | Active |
| A & A Contractors | B | 2009 | Active |
| A E C O M & W M L I V A Joint Venture | A, B | 2020 | Active |
| A J Excavation Inc | A + C10, C13, HAZ | 2009 | Active |
| A-One | B + C29, D34 | 1978 | Active |
| A1 Metropolitan Construction Inc | B | 2017 | Active |
| A1 Valley Construction Services Inc | B | 2023 | Active |
| Abbey Office Furnishings Inc | B + C17, D21 | 1978 | Active |
| Abode Construction Design And Management Inc | B + C39 | 2022 | Active |
| Absolute General Contractors | B + ASB, C33, C39 | 2012 | Active |
| Ace Air Conditioning N Construction | B + C20, C38 | 2015 | Active |
| Acg General Construction And Sons Inc | B | 2025 | Active |
| Acoustech Inc | B | 2017 | Active |
| Adobe West Inc | B | 2017 | Active |
| Advanced Design General Custom | B | 2019 | Active |
| Advanced General Contractor Inc | B | 2023 | Active |
| Advanced Ground Modification Inc | A | 2022 | Active |
| Aecom & W M Lyles II A Joint Venture | A, B | 2018 | Active |
| Aecom & WML Vi, A Joint Venture | A, B | 2020 | Renew by Nov 30, 2026 |
| Aecom & WML Viii A Joint Venture | A, B + ASB, C21, HAZ | 2025 | Active |
| Aecom Infrastructure & WML A Joint Venture | A, B | 2023 | Active |
| Aecom-W M Lyles Vii A Joint Venture | A, B + ASB, C21, HAZ | 2021 | Active |
| Affordable Custom Rain Gutter | B + C43 | 1985 | Active |
| Ag Construction Services Inc | B | 2016 | Active |
| Ag Solutions Construction Inc | B | 2019 | Active |
| Ai Construction LLC | B | 2025 | Active |
| Air Comfort Solutions Inc | B + C20, C38 | 2010 | Active |
| Alchemy Developments Inc | B | 2020 | Renew by Oct 31, 2026 |
| Aleston Construction Inc | A | 2021 | Active |
| All American Construction | B + C39 | 2002 | Active |
| All Do Construction | B | 2009 | Active |
| All Star Plumbing | B + C36 | 2012 | Active |
| All Steam Technologies | B | 2024 | Active |
| All Trades Construction | B | 2008 | Active |
| Allbritten Barefoot Plumbers Electricians & HVAC Technicians | B + C2, C10, C20 +3 | 1979 | Active |
| Allright Diversified Services Inc | B | 1999 | Active |
| Alpha1 Engineering Professional Corporation | A | 2026 | Active |
| Alta Standard Builders Inc | B | 2014 | Active |
| Amassii Construction Inc | B | 2025 | Active |
| American Paving Co | A, B + C8, C12, C31 +1 | 1959 | Active |
| Amg Investors | A, B | 2015 | Active |
| Amigo's Contracting Inc | B | 2026 | Active |
| Ammys General Construction | B | 2025 | Active |
| Andrey's Construction And Remodeling Inc | B | 2016 | Renew by Nov 30, 2026 |
| Apco - Ettner Inc | B | 1996 | Active |
| Apex General Inc | B + C10, C20 | 2020 | Active |
| Apex Masonry Construction Inc | B + C29 | 2003 | Active |
| Apple Ridge Construction | B | 1993 | Active |
| Arca N G Construction Inc | B + C8 | 2017 | Active |
| Arceo Renovations Inc | B2 | 2023 | Active |
| Architectural Wood Design Inc | B + C6 | 2000 | Active |
| Ardent General Inc | A, B | 2011 | Active |
| Ardor Constructors Inc | B | 2021 | Active |
| Arm Of Steel Construction | B | 2025 | Active |
| Arpco Construction Inc | A, B | 2024 | Active |
| Art's Construction Company Inc | A, B + C10 | 2012 | Active |
| Asb Construction Inc | B + C9, D50 | 2019 | Active |
| Ash Tree Construction Inc | B | 2020 | Active |
| Ashwood Construction Inc | B | 1989 | Active |
| Asphalt Design By Juan Gomez | A + C12 | 2003 | Active |
| Athens California Construction | B | 2005 | Active |
| Avesta Developments Inc | B | 2019 | Active |
| Avi Irrigation Inc | A | 1991 | Active |
| Ayc Construction | B | 2012 | Active |
| Aztec Tile & Granite Inc | B2 + C6, C54 | 2022 | Active |
| B & L Contractors Inc | A | 2023 | Active |
| B & L Mechanical Inc | A, B + C2, C4, C16 +5 | 1986 | Active |
| B G V International | A, B + C10, C36, C47 | 2009 | Active |
| B L C Custom Homes Inc | B | 2010 | Active |
| B M Y Construction Group Inc | A, B + C8 | 1994 | Active |
| Bakersfield Well & Pump Co | A + C57, D21 | 1983 | Active |
| Barracuda Construction Inc | A | 2006 | Active |
| Barrier Solar Inc | B + C10 | 2013 | Active |
| Barrier Specialty Roofing & Coatings Inc | B + C2, C33, C39 | 1999 | Active |
| Bay Cal Commercial Painting Inc | B + C33 | 2001 | Active |
| Bay Cal Construction Services Inc | B + C33 | 2008 | Active |
| Bear State Construction Services | B + C20, C39 | 2021 | Active |
| Beckman Tower | A | 2024 | Active |
| Ben Rick Construction Inc | B | 2017 | Active |
| Benart - S & L Custom Homes | B | 1993 | Active |
| Best Framing Inc | B | 2019 | Active |
| Best Weigh Scale Company Inc | B | 2003 | Active |
| Better Enterprises Inc | B + C8, C33 | 2016 | Active |
| Big Bore Drilling Certified Septic Co & Hydroflushing | A + C42 | 1989 | Active |
| Big Valley | B | 2004 | Active |
| Bill Nelson Construction | A | 1994 | Active |
| Bin There Construction | B | 2025 | Active |
| Blue Ladder General Construction LLC | B | 2026 | Active |
| Blue Panther Construction | B | 2026 | Active |
| Bonadelle Development Corporation | B | 1992 | Active |
| Bonadelle Homes Inc | B | 2003 | Active |
| Borgen's Construction Inc | B + C20, C36 | 2021 | Active |
| Bratton Construction Company Inc | B + C29 | 2009 | Active |
| Bratton Masonry Inc | B + C29 | 1972 | Active |