The Energy Company Obligation (ECO) is a government energy efficiency scheme in Great Britain designed to tackle fuel poverty and help reduce carbon emissions.

The current phase of the scheme - ECO4 – commenced in 2022 and applies to measures installed until 31st March 2026. It is administered by Ofgem.

Funding for the scheme is contributed by medium and large energy suppliers to help low-income, fuel-poor and vulnerable households to heat their homes by installing energy efficiency measures.

Qualifying households must be in receipt of qualifying benefits, although a local authority can make funding available to households they deem to be in fuel poverty or on a low income and vulnerable to the cold via the ECO Flex mechanism.

Cornerstone does not currently undertake ECO4 funded installations on a private one-off basis. Potential applicants are advised to engage with their energy company or local authority in the first instance.

Homeowners and tenants – click HERE to find out more about ECO funding, including eligibility criteria and how to apply

However, Cornerstone is able to secure funding via our relationships with obligated parties and brokers for larger ECO funded schemes run by local authorities or housing associations.

To enquire about an ECO funded scheme, contact us today on



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