Heat Pump Installation Cost UK — 2024 Guide
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Post a job — we'll find you an engineer →Air source heat pump installation costs in the UK typically range from £8,000 to £18,000 for a standard residential installation, before any government grants. With the Boiler Upgrade Scheme (BUS) grant of £7,500, net costs can be as low as £4,000 for a straightforward installation. Understanding what drives the cost helps you get a fair quote.
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The main cost factors are: heat pump unit size (output in kW), installer day rate, location in the UK (London/South East significantly more expensive), complexity of the existing heating system, and whether a new hot water cylinder is needed.
Heat pump unit costs by size: 5kW (suitable for a well-insulated 2-bed flat): £2,500–5,000; 8–10kW (3–4 bed semi or detached): £3,500–7,000; 12–16kW (larger or older property): £5,000–9,000. These are unit costs only.
Installation labour typically costs £3,000–8,000 depending on complexity. A straightforward replacement of an existing system is cheaper than a full rewire and pipework upgrade.
Most UK homes need a new unvented hot water cylinder when switching to a heat pump (£600–1,500 fitted). Heat pumps heat water at lower temperatures than gas boilers and require larger cylinder volumes.
Radiator upgrades may be needed — heat pumps work at lower flow temperatures (40–50°C vs 70–80°C for gas) and smaller radiators that were undersized for the original gas system may need upgrading to larger sizes. Budget £200–600 per radiator if needed.
The Boiler Upgrade Scheme (BUS) provides a £7,500 grant for air source heat pump installation in England and Wales — apply before getting quotes as not all installers are BUS-approved. Check current grant availability at ofgem.gov.uk.
Get 3 quotes from MCS-certified heat pump installers. MCS certification is required for the BUS grant. Only MCS-certified installations qualify for the grant — check installer MCS status at mcscertified.com.
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