CALGreen Resources

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CALGreen is a mandatory green building code with additional voluntary provisions. CALGreen is Part 11 (of 12) of the California Building Standards Code, Title 24 of the California Code of Regulations. Codes are updated and adopted on an 18-month cycle, triennial and intervening. The current code is effective through December 31, 2025.

CALGreen requirements encourage sustainable construction practices in the following topic areas:

Planning and design
Energy efficiency
Water efficiency and conservation
Material conservation and resource efficiency
Environmental quality

Mandatory measures apply statewide to both residential and nonresidential projects. In addition, CALGreen contains voluntary measures which can be adopted by local jurisdictions. Voluntary measures are organized into two tiers: Tier 1 sets a higher baseline than CALGreen mandatory measures and Tier 2 increases the stringency further, enhancing Tier 1 requirements. Many local jurisdictions adopt those provisions to enhance and accelerate statewide policy efforts, requiring more resource-efficient and environmentally friendly design than state-mandated building codes.

Explore CALGreen Building Code Divisions

Planning & Design

Electric Vehicle Charging
Site Development
Deconstruction and Reuse (Embodied Carbon)

Energy Efficiency

Building-related energy savings measures

Water Efficiency

Indoor and Outdoor Uses
Water Reuse

Material Conservation

Embodied Carbon Reduction
Construction Waste Reduction

Environmental Quality

Pollutant Control
Indoor Air Quality

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CALGreen

What is CALGreen?

The California Green Building Standards Code— Part 11, Title 24, California Code of Regulations— known as CALGreen, is the first-in-the-nation mandatory green building standards code.

Reach Codes

What are Reach Codes?

A reach code is a local ordinance amending the state building code that requires projects to exceed the minimum state requirements. CALGreen sets mandatory minimum Green Building Standards and includes optional tiers that may be adopted as mandatory by a city or county.

ECA

What is EnergyCodeAce?

Your one-stop shop for no-cost tools, training, and resources to help you comply with California’s Title 24, Part 6 building energy code and Title 20 appliance standards.

CalGreen