How Much Does an Air Source Heat Pump Cost in the UK?

With rising energy costs and a growing focus on low-carbon heating, more homeowners are considering air source heat pumps as an alternative to traditional gas boilers. One of the most common questions we hear is:

How much does an air source heat pump cost in the UK?

In this guide, we'll explain typical installation costs, the factors that affect pricing, available grants and whether an air source heat pump is worth the investment.

What Is an Air Source Heat Pump?

An air source heat pump (ASHP) extracts heat from the outside air and uses it to provide heating and hot water for your home. Unlike gas boilers, heat pumps run on electricity and are highly efficient, making them a popular choice for homeowners looking to reduce their carbon footprint and future-proof their heating system.

Average Air Source Heat Pump Installation Costs

The cost of an air source heat pump depends on the size of the property, heat loss requirements and whether additional upgrades are required.

Typical installation costs are:

Property Type

Estimated Cost

Small Home (1-2 bedrooms)

£8,000 - £12,000

Semi-Detached House

£10,000 - £15,000

Detached House

£12,000 - £18,000+

These figures typically include:

Heat pump supply and installation

Hot water cylinder

Pipework and controls

System commissioning

Removal of the existing boiler (where applicable)

Additional work such as radiator upgrades, underfloor heating or insulation improvements may increase costs.

Boiler Upgrade Scheme Grant

Homeowners in England and Wales may be eligible for support through the Boiler Upgrade Scheme (BUS).

Eligible properties can currently receive a £7,500 government grant towards the installation of an air source heat pump.

This can significantly reduce the upfront cost and make heat pumps more affordable than many people expect.

Eligibility and scheme details can change over time, so it's worth speaking to an MCS-certified installer for the latest information.

What Affects the Cost of an Air Source Heat Pump?

Property Size

Larger homes generally require bigger heat pumps and may need additional emitters such as larger radiators or underfloor heating.

Insulation Levels

Well-insulated homes typically require smaller systems and offer better efficiency.

Existing Heating System

Some properties may need:

Radiator upgrades

New pipework

Hot water cylinder installation

Electrical upgrades

Heat Emitter Type

Underfloor heating works exceptionally well with heat pumps, although many existing radiator systems can also be adapted.

How Much Does an Air Source Heat Pump Cost to Run?

Running costs depend on:

Electricity prices

Home insulation

Heat pump efficiency

Heating controls

Hot water usage

Modern heat pumps can achieve efficiencies of 300–400%, meaning they produce significantly more heat energy than the electricity they consume.

When properly designed and installed, many homeowners find running costs comparable to or lower than older heating systems, especially in well-insulated properties.

Is an Air Source Heat Pump Worth It?

For many homeowners, the answer is yes.

Benefits include:

✅ Lower carbon emissions

✅ High energy efficiency

✅ Year-round heating and hot water

✅ Compatibility with underfloor heating

✅ Potential access to government grants

✅ Reduced reliance on fossil fuels

✅ Future-proof heating technology

Can Heat Pumps Work in Older Homes?

Yes.

Contrary to popular belief, heat pumps are not just for new builds. Many existing and even older properties can successfully use a heat pump, provided the system is properly designed.

A heat loss survey is essential to ensure the correct heat pump size and suitable heat emitters are selected.

Air Source Heat Pump Installation Across Liverpool, Wirral and Cheshire

At 21 Degree Heating, we specialise in designing and installing efficient air source heat pump systems throughout Liverpool, Wirral, Warrington and surrounding areas.

Our experienced team can assess your home, explain your options and help you take advantage of any grants that may be available.

Get a Free Heat Pump Survey