| Brewer Builders LLC | B | 2026 | Active |
| Brightwood Construction Inc | B | 2017 | Active |
| Brley Heating And Air Conditioning Inc | B + C20, C38, C43 | 2019 | Active |
| Brown And Brown Services | B | 2010 | Active |
| Brown D L Construction Inc | A, B | 2019 | Active |
| Brown Enterprises | B | 2004 | Active |
| Brown's Construction Service Inc | A, B + C12, D56, D63 +1 | 2003 | Active |
| Buddy Ruff Construction Inc | A, B + C8, C12, C57 +1 | 2002 | Active |
| Build And Fix Masters Inc | B | 2025 | Active |
| Build It @ Pyramidco Inc | B + C9 | 1980 | Active |
| Built Right Construction | B | 2013 | Active |
| Burtch Construction | A, B + C12 | 1994 | Active |
| Burx Construction LLC | B | 2022 | Active |
| Bwe Construction | A + C51 | 2017 | Active |
| Byington Welding Inc | A + C60 | 2008 | Active |
| C B C M Service Inc | B | 2014 | Active |
| C C Builders Inc | B | 2005 | Active |
| C E S L General Construction | B | 2024 | Renew by Dec 31, 2026 |
| C J Miranda Inc | A | 2016 | Renew by Dec 31, 2026 |
| C M Custom Builders Inc | B | 2006 | Active |
| C S I Contractors Inc | A, B | 2003 | Active |
| C S S Drilling Tools | A, B + D09 | 2021 | Active |
| C2c Construction Inc | B | 2021 | Active |
| C2c Fueling Inc | A, B + C10, HAZ | 2024 | Active |
| C3 General Construction LLC | B | 2025 | Active |
| Cade Construction | B + C8 | 1993 | Active |
| Cal Contractor Services Inc | B + C10, C20, C39 +1 | 2022 | Active |
| Cal Heights Construction Inc | B | 2021 | Active |
| Cal Oak Homes Inc | B | 2026 | Active |
| Cal Pacific Constructors Inc | A, B + C10, C12, C21 +2 | 2015 | Active |
| Cal Valley Contractors Inc | B | 2015 | Active |
| Cal Valley Equipment LLC | A + HAZ | 2014 | Renew by Nov 30, 2026 |
| California Legacy Well Services LLC | A | 2022 | Active |
| Calistro's Painting | B + C33 | 1988 | Active |
| Callahan Pat Ceramic Tile | B + C29, C36, C54 | 1982 | Active |
| Camp S A Pump Company | A + C10, C57, D21 | 1977 | Active |
| Capital Management Inc | A, B + C36, D39 | 2026 | Active |
| Castle & Cooke California Inc | B | 1996 | Active |
| Catano Storage Tanks Inc | A | 2013 | Active |
| Cen-Cal Construction | A + C13 | 2011 | Active |
| Cendecon Inc | B | 2025 | Active |
| Centennial Development Co | B | 2025 | Active |
| Central California Construction Inc | B + C8, C21, D06 | 1999 | Active |
| Central Community Builders Inc | B | 2018 | Active |
| Central Valley Mechanical General Engineering Inc | A | 1985 | Active |
| Central Valley Pipeline & Excavation | A | 2020 | Active |
| Central Valley Plumbing & Mechanical Inc | B + C16, C36 | 2007 | Active |
| Chaddick & Williams Development Inc | B | 2005 | Active |
| Challenge Custom Builders Inc | B | 2004 | Active |
| Champion Construction Consultants Inc | A, B + C8, D39 | 2013 | Active |
| Champion Heating & Air Conditioning | B + C20 | 2002 | Active |
| Charles Evleth Construction Inc | B + C2, C9, C33 +2 | 1991 | Active |
| Chinn Ray Construction Inc | B + C20 | 2006 | Active |
| Chris Bertolucci Construction Inc | B | 1991 | Active |
| Clarke Construction | B | 2026 | Active |
| Clawson Auto Equipment Inc | A + C5 | 2015 | Active |
| Clawson Automotive Equipment & Service Inc | A | 2012 | Active |
| Clear Creek Systems Inc | A, B | 2010 | Active |
| CN Plumbing Inc | B + C36 | 2020 | Active |
| Cna2 Builder Construction | B | 2026 | Active |
| Coast2valley General Contractors LLC | A | 2023 | Active |
| Coastal Netting Systems | A | 1994 | Active |
| Coatepeq Construction Inc | B | 2024 | Active |
| Code Construction | B | 2021 | Active |
| Cognati Construction Inc | A, B + C10 | 2007 | Active |
| Colombo Construction Co Inc | B + C8, C51 | 1960 | Active |
| Colton Foster Construction Co | A, B | 1999 | Active |
| Community Action Partnership Of Kern | B | 1990 | Renew by Dec 31, 2026 |
| Community General Contractor Inc | B | 2021 | Renew by Nov 30, 2026 |
| Community Outreach Services | B + C10, C20, C36 +1 | 2018 | Active |
| Construction Quality Consultants Inc | B | 2008 | Active |
| Control Fire Protection Inc | B + C10, C16 | 1988 | Active |
| Corte Madera Builders Inc | B | 2024 | Active |
| Countryside Construction | B | 2006 | Active |
| Courts And Greens A Corporation | A, B + C21, D06, D12 +2 | 2016 | Active |
| Crawley Construction Inc | B | 2009 | Active |
| Crestline Builders Inc | B | 2002 | Active |
| Criss Construction Corporation | B + C13 | 1979 | Active |
| Crosswhite Construction Inc | B | 2016 | Active |
| CSS | A, B + D09 | 2009 | Active |
| Cubexy LLC | B | 2026 | Active |
| Curt Carter Home Builder Inc | B | 2020 | Active |
| Curt Carter Remodel Specialist Inc | B | 2023 | Active |
| Custom L & A Construction Inc | B | 2020 | Active |
| D M S Drywall & Interior Systems Inc | B + C9, D24, D34 | 2018 | Active |
| D N S Construction Inc | A | 2009 | Active |
| Dac Inc | A, B + C51 | 2021 | Active |
| Dave Packer Custom Builder | B | 1991 | Active |
| Dave Packer Custom Homes Inc | B | 2024 | Active |
| Davis Co | B + C23, C33, D28 | 2024 | Active |
| DC Building Co | B | 2024 | Active |
| Dee & Dee Construction Inc | B | 2022 | Active |
| Deep Real Estate Inc | B | 2024 | Active |
| Delta Construction & Mechanical LLC | B + C10, C20 | 2017 | Active |
| Delta Pump Systems Inc | A + C7, C60, D21 | 2023 | Active |
| Deluxe Construction Inc | B | 2021 | Active |
| Derrick D Enterprise Inc | A, B | 2020 | Renew by Dec 31, 2026 |
| Diaz Plastering Inc | B + C9, C35 | 2011 | Active |
| Dirt Worx Inc | A | 2001 | Active |
| Diversified Project Services International Inc | A + HAZ | 2012 | Active |