The UK Government has extended the ECO4 End Date to 31 December 2026.
In August 2025, the Department for Energy Security and Net Zero (DESNZ) consulted on proposals to extend the ECO4 end date.
DESNZ received 215 responses to the consultation from a variety of stakeholders ranging from the larger energy suppliers and trade associations to individuals with an interest in energy efficiency and fuel poverty.
ECO4 will be now be extended by nine months, ending on 31 December 2026, to allow suppliers additional time to meet existing targets and remediate non-compliant installations.
Solid wall and EFG minimum requirements will remain at current levels and must be achieved by the new ECO4 end date.
As announced in the November 2025 Budget, there will be no successor supplier obligation to ECO4. The government has instead committed to additional grant funding of £1.5bn which will be directed to upgrading low-income households, benefitting those in fuel poverty.
This brings the Warm Homes Plan to just under £15bn in capital investment, making it the biggest energy efficiency programme in British history.
