Working file G2
ECO4 retrofit grant (closing 31 Dec 2026)
ECO4 retrofit grant: amount, eligibility, sunset and stacking with the other live grants.
The grant
ECO4 funds a whole-house treatment package on eligible low-income or vulnerable households. Indicative homeowner-side value £8,000to£12,000 per household; obligated supplier carries the cost.
Sunset
ECO4 closes to new measures on 31 December 2026. Sequencing decisions in the second half of 2026 should treat this as a cliff edge, not a soft transition; the Warm Homes Plan is expected to pick up early 2027.
Eligibility routes
- Means-tested benefits.
- LA Flex declarations on low-income or vulnerable households.
- Health-condition referral routes.
Surveyed 1 October 2026. Ofgem cap for 1 October to 31 December 2026 applied (gas 7.97p, elec 26.32p, gas standing 29.68p, elec standing 54.83p). Next scheduled review 25 November 2026 (January cap announcement). [ref G2]
By Oliver Wakefield-Smith, Founder, Digital Signet. Corrections to oliver at digitalsignet dot com.