The California Energy Commission has approved the following compliance software for the 2025 Building Energy Efficiency Standards (Energy Code) in accordance with the California Code of Regulations: Title 24, Part 1, Article 1, Section 10-109.
These are the only programs authorized to be used under the performance approach method of compliance for the 2025 Energy Code. Permit applications made on or after January 1, 2026 must use approved 2025 compliance software.
Public Domain Compliance Software
California Building Energy Code Compliance (CBECC) is the public domain compliance software developed by the California Energy Commission to demonstrate performance compliance with the residential, nonresidential, and multifamily regulations in the Energy Code. The following versions have been approved for showing compliance with the 2025 Energy Code.
Alternative Calculation Method (Third Party) Compliance Software
The Commission may approve non-public domain computer programs, also known as third party software, as alternative calculation methods that can be used to demonstrate performance compliance with the Energy Code. The following software has been approved by the California Energy Commission to demonstrate performance compliance with the 2025 Energy Code. Third party software is approved for specific occupancies, residential, nonresidential, and multifamily; and for specific project scopes, new construction, additions, and alterations. The occupancy and scope of approval is listed for each of the following approved programs.
There is currently no approved 2025 third party compliance software.