Title 24 Resource Center

Guides to the parts of the California Energy Code that come up most often, written for people who do not do this for a living.

Start here

Prescriptive vs Performance Compliance
What Happens After I Receive My Report?

Keeping current

The California Energy Code is revised roughly every three years. The 2025 edition took effect on 1 January 2026 and applies to projects whose permit application is submitted on or after that date. These guides reflect the code currently in force.