A realistic breakdown of installed costs, grants, and what actually affects the price.
Heat pump costs in Devon and Cornwall vary depending on the size of the system, the type of property, and whether it’s a new build or a retrofit. Below are realistic installed prices (materials + labour) based on current 2026 market rates in the South West.
| Property Type | Typical Installed Cost | Notes |
|---|---|---|
| Small 2-bed house / flat | £8,500 – £11,500 | Smaller heat pump + basic upgrades |
| Average 3-bed house | £10,500 – £14,500 | Most common size in the region |
| Larger 4+ bed house | £13,500 – £18,500 | Larger heat pump + more emitters |
| New build / extension | £9,000 – £13,000 | Usually lower cost due to easier installation |
*Prices include the heat pump, cylinder, installation, and basic controls. They do not include major radiator or insulation upgrades.
In 2026, the Boiler Upgrade Scheme offers a £7,500 grant toward the cost of an air source heat pump installation in England (including Devon and Cornwall).
This grant is available to most homeowners and can significantly reduce the net cost of installation.
Larger homes or poorly insulated properties need bigger heat pumps and more emitters, which increases cost.
Many older homes need larger or additional radiators to work efficiently with a heat pump. This can add several thousand pounds to the project.
Most heat pump installations require a new, larger cylinder. This is included in most quotes but can vary in quality and cost.
Difficult access, working in older properties, or complex pipework routes can increase labour costs.
Use our Heat Pump Estimator to get a better idea of likely costs and system size for your home.