Working file M3
Retrofit heating cost (UK 2026)
Heating stratum cost in 2026: ASHP, GSHP, hybrid, radiator upsize. BUS grant of £7,500 for ASHP and GSHP.
BUS is the largest single grant on a retrofit project at £7,500. It is paid to the installer; you see it on the quote as a reduction.
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 M3]
By Oliver Wakefield-Smith, Founder, Digital Signet. Corrections to oliver at digitalsignet dot com.