Working file V7
ASHP vs GSHP cost (UK 2026)
ASHP vs GSHP cost (UK 2026): side-by-side decision aid with capex, grant treatment, payback shape and surveyor's note.
| Dimension | ASHP | GSHP |
|---|---|---|
| Capex range | £10,500 to £18,000 | £18,000 to £35,000 |
| BUS grant | £7,500 | £7,500 |
| Net capex | £3,000 to £10,500 | £10,500 to £27,500 |
| Delivered SCOP | ~3.0 to 3.5 | ~3.8 to 4.2 |
| Land requirement | External wall space for unit | Garden space for slinky, or borehole drilling |
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 V7]
By Oliver Wakefield-Smith, Founder, Digital Signet. Corrections to oliver at digitalsignet dot com.