Household Energy Efficiency Statistics
Summary
DESNZ publishes statistical collection on household energy efficiency programmes including Energy Company Obligation (ECO) and Green Deal measures. The release provides quarterly ECO cost data and annual insulation statistics. Q4 2025 ECO costs will appear in both the detailed annual report on 19 March and regular quarterly statistics on 26 March.
Why it matters
This is redistributive policy data — tracking symptoms of expensive energy rather than addressing supply constraints or market structure that drive high bills. As such, the statistics monitor wealth transfers through supplier obligations but do not indicate structural energy market reform.
Key facts
- •Q4 2025 ECO costs published 19 March in annual report
- •Regular quarterly statistics continue 26 March
- •Monthly ECO measures updates
- •Annual insulation level reporting
Areas affected
Related programmes
Memo
Notice to users
While quarterly ECO costs data for Q4 2025 will appear in Tables 5.1, 5.3 and 5.5 of the upcoming Household Energy Efficiency statistics release due for publication on 26 March 2026, that cost data will also be published one week earlier in the annual Detailed Household Energy Efficiency Statistics release being published on 19 March 2026. This will allow the Detailed Household Energy Efficiency Statistics release to include ECO costs data for all of 2025.
This series presents statistics on the Energy Company Obligation (ECO) and Green Deal (GD). It incorporates changes as set out in response to the user consultation of National Statistics on the Green Deal, Energy Company Obligation and Insulation statistics. The headline releases present monthly updates of ECO measures and quarterly updates of in-depth ECO statistics, carbon savings and the Green Deal schemes. The detailed report presents annual updates on in-depth ECO statistics and insulation levels.
Historical releases are available on request, see contact details below.
For further information or questions about these statistics, email energyefficiency.stats@energysecurity.gov.uk.