California

For California, energy code in force is 2022 Building Energy Efficiency Standards; effective date is January 1, 2023; adopting authority is California Energy Commission; statute / rule citation is Title 24, Part 6, verified against its source on 2026-09-29.

State: California
Energy code in force: 2022 Building Energy Efficiency Standards verified
Effective date: January 1, 2023 verified
Adopting authority: California Energy Commission
Statute / rule citation: Title 24, Part 6

Sourceenergy.ca.gov

Verified2026-09-29

Review by2027-02-14

DatasetWhich energy code each US state enforces for new homes: the IECC edition (or state equivalent) actually in force, with effective dates and amendments, from the state rules themselves

What the source says

The 2022 Building Energy Efficiency Standards took effect January 1, 2023.

— energy.ca.gov, retrieved 2026-08-18

Source

energy.ca.govhttps://www.energy.ca.gov/programs-and-topics/programs/building-energy-efficiency-standards

Last verified against source: 2026-09-29. Due for re-check by 2027-02-14. This page as Markdown · OKF bundle · full dataset as JSON.