| Calcons Inc | B | 2021 | Active |
| Calemm Construction Inc | B + C36 | 2026 | Active |
| Cali #1 Roofing Inc | B + C39 | 2023 | Active |
| Cali Builders & Construction Inc | B + D06, D28, D30 +2 | 2019 | Active |
| Cali Pro Builders | A, B | 2024 | Active |
| Caliber Construction & Development Inc | B | 2001 | Active |
| California Balcony Compliance | A, B + C21, C36 | 2015 | Active |
| California Certified Builders Inc | B | 2026 | Active |
| California Energy Efficient Construction Inc | B | 2024 | Active |
| California Energy Upgrade Pros Inc | B | 2023 | Active |
| California First Roofing Inc | B + C39 | 2022 | Active |
| California Foundation Works Inc | B | 2012 | Active |
| California Green Dreams Inc | B | 2022 | Active |
| California Living Construction | B | 2019 | Active |
| California Modern | B | 2024 | Active |
| California Paving And Grading Co Inc | A + C12 | 1979 | Active |
| Callahan Building And Investment Company Incorporated | B | 1979 | Active |
| Calprime Construction Inc | B | 2025 | Active |
| Calrox Inc | B + C16, C36 | 2008 | Active |
| Caltron Construction Inc | A, B + C10, C17, C36 +2 | 1996 | Active |
| Canyon Builders LLC | B | 2025 | Active |
| Capital Building Maintenance & Restoration LLC | B | 2026 | Active |
| Capra Development Inc | B + C36 | 2008 | Active |
| Caputo Construction Corporation | B | 2004 | Active |
| Carebf Builder Services | B | 2019 | Active |
| Carlson And Son Inc | B | 1994 | Active |
| Carlson J M Construction Corporation | B | 1997 | Active |
| Carmel Creek Construction Inc | B | 2020 | Active |
| Carmichael Construction Alliance Inc | B | 2026 | Active |
| Carpet Floor & More | B + C15, C54 | 2003 | Active |
| Carrillo's Construction Services Inc | B | 2018 | Active |
| Carson Development Inc | B | 1993 | Active |
| Casa Blanca Construction & Development Inc | B | 1996 | Active |
| Casa Installation Corporation | B | 2021 | Active |
| Cashell Kitchens & Baths Inc | B2 | 2022 | Active |
| Cassette Inc | B + C47 | 2021 | Active |
| Castillo Construction Services Inc | B | 2021 | Active |
| Caves Construction Inc | B | 2024 | Active |
| CCC Coronado Construction Company Inc | B | 2025 | Active |
| CCR Construction | B | 2026 | Active |
| Cedar And Stone Construction | B | 2025 | Active |
| Cedar Construction & Development Inc | B | 1989 | Active |
| Cedar Property Solutions LLC | B | 2026 | Active |
| Cedars Builders | B + C10 | 2017 | Active |
| Cedros Property Group Inc | B | 2022 | Active |
| Ceiba Remodeling Services Inc | B | 2024 | Renew by Dec 31, 2026 |
| Central Reclamation | B + C21, D30 | 1995 | Active |
| Century Clean Inc | B | 2018 | Active |
| Century West Associates | B | 1988 | Active |
| Ceron Construction Inc | B | 2018 | Active |
| CF For La LLC | B | 2025 | Active |
| CG Construction Corp | B | 2026 | Active |
| Chadmar Construction Company LLC | B | 2017 | Active |
| Chadmar R S M Partners L P | B | 1994 | Active |
| Chait & Company | B | 1995 | Active |
| Chalon Company Inc | B | 2016 | Renew by Dec 31, 2026 |
| Chameleon Contracting Group Inc | B | 2025 | Active |
| Champion Construction | B | 2021 | Active |
| Chappell Build Co | B | 2024 | Active |
| Chase Homes LLC | B | 2024 | Active |
| CHC Building Inc | B | 2023 | Active |
| Checkmark Construction Inc | B | 2026 | Active |
| Chidan Construction Co | B | 2017 | Active |
| Chief Top Remodeling Inc | B | 2022 | Active |
| Chimney Safety Experts | B | 2025 | Active |
| China Pacific Inc | B + C10, C20, C36 +2 | 1987 | Active |
| Chiron Construction Inc | B | 2001 | Active |
| Chosen Construction Inc | B | 2024 | Active |
| Ciccone Builders Inc | B | 2004 | Renew by Dec 31, 2026 |
| Cim Construction Inc | B | 2025 | Active |
| Citiwide Engineering Inc | A, B + C10, C33 | 1991 | Active |
| Citizen Properties Inc | B | 1991 | Active |
| City Midland Development | B | 1993 | Active |
| City Scape Design Build Development Inc | B | 2025 | Active |
| Claw And Hammer Inc | B | 2017 | Renew by Nov 30, 2026 |
| Cle Electric Inc | A, B + C10 | 2008 | Renew by Dec 31, 2026 |
| Clear Choice Restorations LLC | B | 2026 | Active |
| Clear Cuts Construction Inc | B + C36 | 2024 | Active |
| Clement Construction | B | 2020 | Active |
| Clockwork Builders Inc | B | 2020 | Active |
| Clune Construction Company L P | B | 1997 | Active |
| CMC Crazy Monkey Construction Inc | B | 2024 | Active |
| CNP Construction And Engineering | A, B + C36 | 2023 | Active |
| Co-Lab Construction Inc | B | 2020 | Active |
| Coalition For Responsible Community Development | B + C33, D38 | 2011 | Active |
| Coast Construction Solutions | B | 2022 | Active |
| Coast Remodeling | B2 | 2024 | Active |
| Coast To Coast Home Builders Inc | B | 2024 | Active |
| Coastal Construction And Design | B | 2013 | Active |
| Cobuild Inc | B | 1982 | Active |
| Codesign LLC | B | 2018 | Active |
| Cohen Development Incorporated | B + C53 | 2005 | Active |
| Col Construction | B | 2019 | Active |
| Colby Wells Inc | B | 2000 | Active |
| Coleman Build LLC | A, B | 2024 | Active |
| Coleman Construction Inc | A, B | 1994 | Active |
| Commercial Paving & Coating | A + C32 | 1985 | Active |
| Commscape Inc | B + C7, C10, C27 | 2003 | Active |
| Community Infrastructure Investment Group Inc | B | 2026 | Active |
| Comodo Interiors U S | B | 2019 | Active |