Installation Assurance Authority

Renewables and energy · Energy efficiency certification and assurance organisation

The Installation Assurance Authority operates certification and assurance services for energy efficiency installation. Its activities include specific certification schemes, guarantees and an installer identity and competence card scheme.

Checked November 2026Official sources below.

What it covers and whether it is required

IAA membership is not one unrestricted retrofit licence. The legal or funding requirement depends on the measure and programme, while each certification has a defined scope.

Joining requirements and costs

Applicants choose the relevant service and provide evidence for that route. PAS 2030 certification, MCS certification, competent person registration and a worker card are different checks. Confirm the required qualifications, business controls, assessment and insurance for the measures you install.

Check the current fees with Installation Assurance Authority before applying. Ask whether the quotation includes application, assessment, renewal and any per-job charges. Use published fees or ask for a written quotation.

What it means for homeowners

Check the business’s actual certificates and approved measures, then confirm the project guarantee. The installer card identifies a worker and records credentials; it should not be used as proof that every installation carries a particular insurance policy or funding approval.

How to check a claim

Official member, card or certificate check: Installation Assurance Authority.

Match the record to the named person or contracting business. Check the current scope, not just a logo on a van or an old certificate. If the public record does not show the detail you need, ask the body to confirm it before appointing the business.

Where the scheme applies

UK energy efficiency sector. Funding programmes, certification scope and self-certification powers differ by nation and measure.

Common questions

Does an IAA installer card prove a home has a guarantee?

No. The worker’s card and the project’s guarantee are separate. Obtain the certificate or policy issued for the installation.

How do I check Installation Assurance Authority status?

Use the official verification service linked in this guide. Match the person or legal business name, current status and relevant work category. For a guarantee, check the document issued for your contract as well.

Official sources

Sources checked November 2026. Scheme rules can change; confirm current requirements before applying or signing a contract.