Written Question·Department for Energy Security and Net Zero·UIN 87498

Energy Company Obligation: Wales

Tabled: 3 November 2025
Answered: 11 November 2025
Named Day

Question

Llinos Medi

Plaid CymruYnys Môn

To ask the Secretary of State for Energy Security and Net Zero, with reference to the National Audit Office Report entitled Energy efficiency installations under the Energy Company Obligation, published on 14 October 2025, what the cost to the public purs

Answer

Martin McCluskey
The remediation costs sit with the original installer and we have been clear that no household should be asked to pay any money to put things right. We expect most remediation for solid wall insulation installed under ECO4 or GBIS to cost between £250 and...

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