ECC-Provider, ECC-Rater, Rater Company and Registry: Who Does What?
Four labels, four jobs. The ECC-Provider is an organisation the Energy Commission approves to certify raters, audit them and run the registry. The ECC-Rater is the certified person who tests. A rater company employs raters. The registry is the provider's database where signed documents are stored and verified.
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The four roles in a line each
- ECC-Provider: trains and certifies raters and rater companies, audits their work and disciplines them.
- ECC-Rater: a person trained, tested and certified by a provider to do field verification and diagnostic testing.
- ECC-Rater Company: a business certified by a provider to offer those services through its raters.
- Data registry: a web service and database that registers compliance documents.
Who certifies whom
Part 1 of the Energy Code makes the provider independent of the raters it certifies: it may hold no financial interest in a rater company or rater. A company applying for certification needs at least one principal who holds a rater certification or is enrolled in training.
Who sees and changes what in the registry
A company gets view-only access to the documents its raters registered and may not change data on a certificate of verification. A rater who works for no company counts as independent and files an annual activity report with the Commission, starting in 2027. A company may act as documentation author for a CF2R, but it may not sign as the responsible person or the installing technician. A company that also sells design, permitting or similar services on the same project must file a declaration of separation with the provider.
The registry belongs to the provider
For residential work the registry is maintained by the ECC-Provider, and the appendix requires a residential registration provider to be an approved ECC-Provider as well. The provider must also let departments, builders, raters and the Commission verify a registered copy remotely. See how to look up a registration number.
Above all of them
The Commission approves each provider for one code cycle, and its Executive Director can discipline a provider. Which provider is listed today is on the approved-provider check.
Which one you will deal with
Mostly the rater or the company. For the person in the field read what an ECC-Rater does, and for the program as a whole see what the ECC Program is. Our residential reports list the verification your job needs.
Common Title 24 Questions
- What is Title 24?
- Do I need a Title 24 report?
- How much does a Title 24 report cost?
- How long does a Title 24 report take?
- What is included in a Title 24 report?
- What plans do I need to upload?
Frequently Asked Questions
No. A provider is approved by the Energy Commission and certifies raters. A rater company is certified by a provider and sends its raters to test.
Yes. HERS raters, the former title, are recognized as ECC-Raters because field verification moved into the ECC Program with the 2025 Energy Code.
Explore ECC Providers
- How Do I Check Whether an ECC-Provider Is Approved, and Where Does Golden State Registry Stand?
- What Is the Energy Code Compliance (ECC) Program?
- Can a Title 24 Project Move From One ECC Registry to Another?
View all ECC Providers guides → · CHEERS and ECC · Title 24 guide