Heat Pumps for Homeowners: Costs, Savings, and Is It Worth It
The UK government's target of 600,000 heat pump installations per year by 2028 represents a seismic shift in how British homes are heated. At HouseCheckup, our £24.99 property reports include EPC data and heating system details, helping buyers understand a property's current energy setup and the potential for heat pump installation. With the Boiler Upgrade Scheme offering £7,500 grants and the eventual phase-out of new gas boilers, understanding heat pumps has become essential for every homeowner.
What Is a Heat Pump?
A heat pump works like a refrigerator in reverse — it extracts heat from the outside air, ground, or water and concentrates it to heat your home and hot water. Even when the outside temperature is below freezing, there is still enough thermal energy in the air or ground for a heat pump to work efficiently. For every unit of electricity a heat pump uses, it typically produces 2.5 to 4 units of heat, making it significantly more efficient than a gas boiler (which produces less than 1 unit of heat per unit of gas).
Air Source Heat Pumps (ASHPs)
Air source heat pumps are the most common type installed in UK homes. They consist of an outdoor unit (similar in appearance to an air conditioning unit) that extracts heat from the outside air, and an indoor unit that distributes it through your heating system. ASHPs are cheaper to install than ground source alternatives and don't require extensive groundwork, making them suitable for most properties.
Ground Source Heat Pumps (GSHPs)
Ground source heat pumps extract heat from the ground using loops of pipe buried either horizontally (requiring significant garden space) or vertically in boreholes. Because ground temperatures remain relatively constant year-round (8–12°C in the UK), GSHPs are more efficient than ASHPs and perform consistently regardless of air temperature. However, installation costs are substantially higher.
Hybrid Heat Pumps
A hybrid system combines a small air source heat pump with a traditional gas boiler. The heat pump handles most of the heating when temperatures are mild, while the boiler kicks in during the coldest periods. This can be a practical stepping stone for homes that aren't yet well enough insulated for a full heat pump system.
How Much Does a Heat Pump Cost?
Installation costs vary significantly depending on the type of system, the size of your property, and the complexity of the installation:
| System Type | Typical Cost (Before Grant) | Cost After BUS Grant |
|---|---|---|
| Air source heat pump | £8,000–£15,000 | £500–£7,500 |
| Ground source (horizontal) | £20,000–£30,000 | £12,500–£22,500 |
| Ground source (borehole) | £25,000–£35,000 | £17,500–£27,500 |
| Hybrid heat pump | £5,000–£10,000 | Not eligible for BUS |
These costs include the heat pump unit, installation, any necessary modifications to the heating distribution system (such as larger radiators), and commissioning. Additional costs may include a hot water cylinder (£500–£1,500 if you don't already have one) and potential upgrades to your electrical supply.
Running Costs: Heat Pump vs Gas Boiler
The critical question for most homeowners is whether a heat pump will actually save money compared to their existing gas boiler. The answer depends on several factors:
Key Variables
- Electricity vs gas price ratio: At current prices, electricity costs roughly 3–4 times more per kWh than gas. A heat pump must achieve a Coefficient of Performance (COP) of 3+ to break even on fuel costs alone
- Insulation levels: A well-insulated home needs less heat, making the heat pump work less hard and more efficiently
- Radiator sizing: Heat pumps work best at lower flow temperatures (35–45°C vs 55–75°C for gas). Existing radiators may need to be upsized or underfloor heating added
- Hot water demand: Heat pumps are less efficient at heating water to high temperatures (needed for baths and showers)
Typical Annual Running Costs
| Scenario | Gas Boiler | ASHP | GSHP |
|---|---|---|---|
| Well-insulated semi (EPC C+) | £950 | £750 | £600 |
| Average semi (EPC D) | £1,400 | £1,200 | £950 |
| Poorly insulated (EPC E-F) | £1,900 | £1,800 | £1,400 |
| Large detached (EPC D) | £2,200 | £1,900 | £1,500 |
Estimates based on typical 2026 energy prices. Actual costs depend on tariff, usage patterns, and system efficiency.
The Boiler Upgrade Scheme (BUS)
The Boiler Upgrade Scheme provides upfront grants to help homeowners switch from fossil fuel heating to heat pumps:
- £7,500 for an air source heat pump
- £7,500 for a ground source heat pump
- The grant is applied by the installer directly, reducing the price you pay
- Your property must have a valid EPC (not older than 10 years)
- You must be replacing a fossil fuel heating system (gas, oil, LPG, or electric storage heating)
Is Your Home Suitable for a Heat Pump?
Not every home is immediately suitable for a heat pump. The key considerations are:
- Insulation: Heat pumps work best in well-insulated homes. If your EPC rating is E or below, invest in insulation first
- Space for the outdoor unit: ASHPs need an outdoor unit roughly the size of a large suitcase, positioned away from windows and neighbouring properties due to noise
- Planning permission: ASHPs are generally permitted development, but there are size and noise limits. Conservation areas and listed buildings may require planning permission
- Heating distribution: Heat pumps work most efficiently with underfloor heating or oversized radiators. Standard radiators may need upgrading
- Hot water cylinder space: If you currently have a combi boiler, you'll need space for a hot water cylinder
- Electrical capacity: Heat pumps typically need a 32-amp supply. If your home has an older electrical setup, an upgrade may be needed
Noise Considerations
Air source heat pumps produce noise from their outdoor fan unit — typically 40–60 decibels at 1 metre distance, comparable to a refrigerator or quiet conversation. However, noise can be a concern for neighbours, particularly in terraced housing or if the unit is positioned near bedroom windows. Planning rules require the unit to be at least 1 metre from the property boundary, and MCS-certified installers must conduct a noise assessment as part of the installation.
Impact on Property Value and EPC
Installing a heat pump can improve your EPC rating by 1–3 bands, depending on what it replaces and the overall insulation level of the property. As EPC ratings increasingly affect property values (up to 14% premium for A-B rated homes), a heat pump can be a significant contributor to property value. The growing awareness of the gas boiler phase-out is also making heat pump-equipped homes more attractive to forward-thinking buyers.
Understand Your Property's Heating Potential
A HouseCheckup report for just £24.99 shows the current EPC rating, heating system type, and energy costs for any address in England and Wales. Whether you're buying a property with a heat pump already installed and want to verify its efficiency, or you own a gas-heated home and want to understand the upgrade opportunity, our report provides the data you need. At £24.99, it's an essential starting point for making informed decisions about your home's heating future.
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