The Energy Code Compliance (ECC) Program is administered by ECC-Providers that must be approved by the CEC to conduct the duties specified in the 2025 Energy Code, which include training and oversight of ECC-Raters and operation of a residential data registry. All ECC-Provider responsibilities are given in Section 10-103.3 of the 2025 Energy Code and in the 2025 Reference Appendices.
Please subscribe to receive program-related announcements sent to the Building Energy Efficiency Standards subscription topic.
This page contains the following sections:
- ECC-Providers
- ECC-Provider Application Process and Guidance
ECC-Provider listings specify the scope of approval and the ECC-Provider's data registry capabilities.
ECC-Providers
CHEERS was approved by the CEC on November 12, 2025, to certify and oversee ECC-Raters who conduct field verification and diagnostic testing to demonstrate 2025 Energy Code compliance for projects in:
- Newly constructed single-family and multifamily buildings.
- Additions to existing single-family homes and multifamily dwelling units.
- Alterations of single-family homes and multifamily dwelling units.
- Efficiency measures in dwelling units and mechanical systems in nonresidential buildings.
CHEERS was also approved to train and certify ECC-Rater Companies and to provide its external digital data source (EDDS).
CHEERS operates a residential data registry for generating 2025 Energy Code compliance documentation. The registry is also approved for 2013, 2016, 2019, and 2022 Energy Code documentation registration.
- Exclusions: 2022 and 2025 low-rise multifamily (LRMF) certificates of compliance (LMCC) for prescriptive new construction, additions, and alterations, plus the associated certificate of installation (LMCI) for prescriptive new construction mechanical systems.
Report a concern about a CHEERS-certified rater on CHEERS.
ECC-Provider Application Information and Resources
ECC-Provider applications may be electronically filed to CEC Docket Log 25-BSTD-01.
Prospective ECC-Providers are encouraged to review the 2025 Energy Code Compliance Provider Application Guide. The guide addresses application preparation, submission, evaluation, and approval
2025 Energy Code Compliance Provider Application Guide
Prospective ECC-Providers are encouraged to review the 2025 Energy Code Compliance Provider Application Guide. The guide addresses application preparation, submission, evaluation, and approval.
- ECC-Provider application guide (publication CEC-400-2025-012).
- ECC-Provider and Residential Data Registry application checklist – Excel Spreadsheet.
- 2022 Approval Process for Use of an External Digital Data Source
- 2022 External Digital Data Source (EDDS) Checklist for Applicants
Provider Applications
- California Home Energy Efficiency Rating Services (CHEERS)
- Notice of Public Comment Period for the CHEERS ECC-Provider and Data Registry Applications
- Executive Director Recommendation to Approve the CHEERS ECC-Provider and 2025 Energy Code Data Registry Applications.
- Order for approval
- National Energy Testing Institute, Inc. DBA Golden State Registry (GSR)
- No staff reports or notices at this time.
- Information on e-filing and e-commenting at the California Energy Commission
- For confidential e-filings refer to page 25
For questions on e-filling, please contact the Dockets Unit.
To contact ECC Program staff, please email SCO@energy.ca.gov.