Heat Pump Costs UK 2026: Complete Price Breakdown

Heat Pump Costs UK 2026: Full Breakdown of What You'll Pay

Heat pumps represent a significant upfront investment, but the costs have shifted dramatically since the government introduced the Boiler Upgrade Scheme (BUS) grant of £7,500. For many homeowners, this grant brings the net cost of an air source heat pump down to levels that rival a premium gas boiler replacement. This guide breaks down every cost component so you can budget accurately before you speak to an installer.

Air Source Heat Pump (ASHP) Costs

An air source heat pump system has several cost components that are often quoted separately by installers. Here is what each element typically costs in 2026:

• Heat pump unit: £3,000 – £7,000 depending on brand, output, and model
• Installation labour: £2,000 – £4,000 for a standard installation
• Hot water cylinder: £500 – £1,500 (most homes switching from a combi boiler will need one)
• Radiator upgrades: £1,000 – £3,000 if your existing radiators are undersized for lower-temperature heating
• Electrical upgrades: £300 – £800 if your consumer unit needs upgrading
• MCS certification and commissioning: Usually included in the installer quote

Adding these together, a fully installed ASHP system costs £8,000 – £14,000 before any grants. After the £7,500 BUS grant, the net cost falls to as little as £500 – £6,500, making the comparison with a new gas boiler (£2,000 – £4,500 installed) far more competitive than it first appears. For full details on claiming this grant, see our Boiler Upgrade Scheme guide.

Ground Source Heat Pump (GSHP) Costs

Ground source heat pumps extract heat from the ground via buried pipework (ground loops or boreholes). They are significantly more expensive to install because of the groundwork involved:

• Unit and installation: £15,000 – £35,000 total
• Horizontal ground loops (requires large garden): towards the lower end of that range
• Vertical boreholes (drilled 50–150m deep, suits smaller plots): towards the higher end

After the £7,500 BUS grant, net costs run from approximately £7,500 – £27,500. The higher efficiency of ground source systems (typically COP 3.5–4.5 vs 2.5–3.5 for air source) can offset the higher upfront cost over a 20-year lifespan, particularly in well-insulated homes.

Cost by House Type

Your house type heavily influences total installed cost because it determines heating demand, radiator sizing requirements, and the complexity of the installation.

House Type	Typical Heat Demand	ASHP Unit Size	Installed Cost (Before Grant)	Installed Cost (After £7,500 Grant)
1–2 bed flat or terrace	4–6 kW	5–7 kW	£8,000 – £10,000	£500 – £2,500
3 bed semi-detached	6–9 kW	8–10 kW	£9,000 – £12,000	£1,500 – £4,500
4 bed detached	9–14 kW	11–14 kW	£11,000 – £14,000	£3,500 – £6,500
Large detached or period property	14–20 kW	14–16 kW (cascaded)	£13,000 – £20,000+	£5,500 – £12,500+

Radiator Upgrades: Do You Need Them?

Heat pumps typically deliver water at 45–55°C, compared to 70–80°C for a gas boiler. This means your existing radiators may need to be larger to deliver the same heat output. An MCS-certified installer will carry out a room-by-room heat loss calculation to determine which radiators, if any, need replacing.

Many modern homes insulated to 2000s or later standards can retain most or all of their existing radiators. Older homes — particularly Victorian and Edwardian properties — often need significant upgrades, adding £1,000 – £3,000 to the project. If your home has underfloor heating, you are ideally placed: heat pumps and underfloor heating are an excellent pairing.

Annual Running Costs

Running costs depend on your electricity tariff, the heat pump's efficiency, and how well-insulated your home is. On a standard electricity tariff (around 24p/kWh in 2026) and with a COP of 3.0, a heat pump heating an average three-bedroom semi costs approximately:

• Air source heat pump: £800 – £1,200 per year
• Gas boiler (same house): £900 – £1,400 per year (at ~7p/kWh gas)
• Ground source heat pump: £600 – £900 per year (higher COP)

On a dedicated heat pump electricity tariff — several suppliers now offer rates of 10–15p/kWh overnight — heat pump running costs can fall to £400 – £700 per year, making them significantly cheaper than gas even before factoring in the environmental benefit. Use our heat pump savings calculator to model what you'd pay based on your home.

What Affects the Final Price?

Several factors push costs up or down beyond the ranges above:

• Installer location: London and South East installers typically charge 15–25% more than the national average
• Access and complexity: Difficult roof access, unusual layouts, or homes requiring significant pipework changes increase labour costs
• Brand choice: Premium brands such as Vaillant, Mitsubishi, and Daikin cost more upfront but tend to offer better warranties and reliability
• Time of year: Demand peaks in autumn; booking in summer can save money
• Insulation upgrades: Poorly insulated homes may need loft or wall insulation before an installer will agree to size the system correctly — budget an extra £300 – £2,000

Is a Heat Pump Worth It?

For most households receiving the £7,500 BUS grant, a heat pump makes clear financial sense over a 10–15 year horizon. Running costs are broadly comparable to gas today, and as electricity decarbonises and gas prices remain volatile, the economics tilt further in the heat pump's favour. See our full heat pump vs gas boiler comparison for a detailed 10-year total cost of ownership analysis.

For more information on what grants are available and how to apply, read our complete guide to heat pump grants in the UK.