| C A Construction | A, B + C8, C39, D49 | 1990 | Active |
| C C C Services Inc | B | 2006 | Active |
| C H M General Contractor Inc | B | 2023 | Active |
| Ca Light General Contractor Inc | B | 2003 | Active |
| Cali Paving Engineers | A | 2024 | Active |
| Cali State Paving Inc | A, B + C12 | 2016 | Active |
| California Building Maintenance | B | 2012 | Active |
| California Construction & Roofing Inc | B + C39 | 2000 | Active |
| California Contractors Group | B + C53 | 2022 | Active |
| California General Construction | B | 2018 | Active |
| California Showcase Construction Inc | B | 2008 | Active |
| Canyon Construction Services | B | 2013 | Active |
| Capital Construction & Restoration Inc | B | 2016 | Active |
| Cardenas Construction Corporation | B + C8 | 2023 | Active |
| Cardonal Construction | B | 2021 | Active |
| Carrillo Construction LLC | B | 2026 | Active |
| Casa Renovations Inc | B2 + C15 | 2010 | Active |
| Cash Equipment Inc | A | 2023 | Active |
| Cat Tracking Inc | A, B + C8, C12, C31 +1 | 2014 | Active |
| CCS Carrera Construction Services Inc | B + C9 | 2011 | Active |
| CDL Landscape Inc | B + C27, C53 | 1994 | Active |
| Ceballos Painting Service Inc | B + C33 | 2019 | Active |
| Champion Electric Inc | B + C10 | 1998 | Active |
| Champion Framing Inc | A, B | 2015 | Active |
| Cherry Equipment Rental Inc | A | 2000 | Active |
| Circle City Electric Inc | B + C10 | 1989 | Active |
| Civil West General Engineering Inc | A | 2021 | Active |
| Co Brothers LLC | B | 2017 | Active |
| Cobalt Property Maintenance | B | 2005 | Active |
| Cobos Construction Inc | B | 2026 | Active |
| Complete Concept Builders | B | 2025 | Active |
| Complete Renovations Inc | B | 2010 | Active |
| Constantino General Contractor Inc | B | 2024 | Active |
| Cor Tech Construction | B | 2016 | Active |
| Core Logistics And Construction Inc | B | 2018 | Active |
| Cortez & Sons Concrete Construction Inc | B + C8 | 2022 | Active |
| Craftwell Construction LLC | B | 2022 | Active |
| Create & Build Construction Inc | B | 2021 | Active |
| Creative Design Builders Inc | B + D24 | 1982 | Active |
| Cress Construction And Remodeling Inc | A, B | 2025 | Active |
| Creto Inc | A | 2023 | Active |
| Curious Contractors LLC | B | 2025 | Active |
| Custom Const Builders Inc | B | 2019 | Active |
| Custom Craft Construction Inc | B | 2021 | Active |
| Custom Landscape Enterprise Inc | B + C27, C53 | 2007 | Active |
| D & E Restoration | B | 2022 | Active |
| D L Wiest Enterprises Inc | A, B + HAZ | 1990 | Active |
| D N J Construction & Engineering Inc | A | 2020 | Active |
| D N M Construction Inc | B | 2016 | Active |
| D R H Construction | B | 2011 | Active |
| D S U Utility Trenching Inc | A | 1981 | Active |
| D'Vega Builders Inc | B + C9, D49 | 2012 | Active |
| Dalke & Sons Construction Inc | B + C10 | 1991 | Active |
| Danmark Construction | B | 2013 | Active |
| DCRN Construction Services | B | 2026 | Active |
| De La's Renovation & Construction | B | 2025 | Active |
| Deforest Construction Inc | B | 1987 | Active |
| Dei Telecommunication Services Inc | A + C7 | 2000 | Renew by Nov 30, 2026 |
| Delafuente Excavation Inc | A | 2013 | Active |
| Delanos Building And Renovation | B | 2025 | Active |
| Delmaya Group LLC | B + C33 | 2007 | Active |
| Delo Air | B + C20, D62 | 2006 | Active |
| Delta Building Solutions Corp | B | 2026 | Active |
| Demo And Build Construction Inc | B, B2 + C21 | 2026 | Active |
| Denali National Construction Company Inc | B | 2019 | Active |
| Diamond Interior & Exterior Construction Inc | B | 2019 | Active |
| Diversified Concrete Services | B + C8, C50 | 2012 | Active |
| DLT Construction Engineering | A | 2017 | Active |
| Do It Right Builders | B | 2024 | Active |
| DPD Construction | A, B + C15, C39 | 2008 | Active |
| Duarte Constructors LLC | B | 2025 | Active |
| E C P Construction Restoration & Remodels Inc | B | 2022 | Active |
| Earth Shapers Inc | A | 2023 | Active |
| Eca Engineering | A, B | 2024 | Active |
| Eco Tec Air Services Inc | B + C20 | 2017 | Active |
| Econo Fence LLC | B + C13 | 2026 | Active |
| Edney Built Construction LLC | B | 2025 | Active |
| Edw Construction Inc | B | 2015 | Active |
| Eleazar General Engineering Inc | A | 2021 | Active |
| Element6 Construction | B | 2022 | Active |
| Elite Contracting Incorporated | B | 2024 | Active |
| Elite Electric | B + C10 | 1982 | Active |
| Elite Roofing Solutions | B + C39 | 2010 | Active |
| Elite Vision General Builders | B | 2026 | Active |
| Em Development Corp | A | 2025 | Active |
| Em Landscape Pools & Spas | B + C27, C53 | 2004 | Active |
| Empire Carports Inc | B | 2022 | Active |
| Empire Kitchen & Bath | B | 2016 | Active |
| Empyrean Plumbing Inc | B + C2, C34, C36 | 2006 | Active |
| Endless Touch Construction Inc | B2 | 2025 | Active |
| Envision Landscape | A + C27, HAZ | 2004 | Active |
| Ephnuti Construction Inc | A, B | 2024 | Active |
| Es Installment Plus LLC | B | 2024 | Active |
| Escoto Concrete | B + C8 | 2017 | Active |
| Ethics Landscape Construction Inc | A + C8, C27 | 2022 | Active |
| Evans Walker Enterprises | A, B | 1978 | Active |
| Evelyn's Construction Services Inc | B + C43 | 2021 | Active |
| Evergreen Environment Inc | A, B + C10, C27, C36 +2 | 2002 | Active |
| Exact Leak Detection Inc | B + C36 | 1994 | Active |
| Exclusive Cabinets And Countertops By Jon | B + C54 | 2004 | Active |