What a heat pump costs
Installed prices, and what you pay after the grant is knocked off. The grant is deducted from your quote by the installer — you never handle the money.
| House | Size | Installed | After £7,500 grant |
|---|---|---|---|
| Flat or small terrace | 5 kW | £8,000–£11,000 | £500–£3,500 |
| Terraced house | 6–8 kW | £9,500–£13,000 | £2,000–£5,500 |
| Semi-detached | 8–10 kW | £11,000–£15,000 | £3,500–£7,500 |
| Detached | 10–14 kW | £13,000–£18,000 | £5,500–£10,500 |
| Large or older detached | 14–16 kW | £16,000–£24,000 | £8,500–£16,500 |
Off the gas grid? You may get £9,000
Between 21 July 2026 to 31 March 2027, properties off the gas grid can claim £9,000 rather than £7,500. If you are on oil or LPG, that window is worth moving for.
What drives the price
- Radiators. Often the biggest variable. Replacing several to run at lower temperatures can add £1,500–£4,000 — and is usually money better spent than a bigger heat pump.
- Hot water cylinder. If you have a combi boiler you will need one fitted, and somewhere to put it.
- Pipework. Older microbore pipe often needs upgrading.
- Electrical supply. Occasionally needs upgrading, which the DNO has to approve.
Getting the grant
- Deducted from your installer's quote up front — you never handle the money.
- Installer must be MCS certified and a member of an approved consumer code.
- The old requirement for an EPC with no outstanding insulation recommendations has been removed.
Before you commit: check what it would cost to run.