Air Source Heat Pump Cost UK (2026 Guide)
Thinking about installing a heat pump? Here’s what UK homeowners are really paying in 2026 — including typical prices, what affects the cost, and how much you can save with grants.
Typical cost: £8,000–£15,000 before grants.
• Independent UK heat pump researcher
Quick Answer: How Much Does an Air Source Heat Pump Cost?
In the UK, a typical air source heat pump installation usually costs around £11,000, with most real-world projects falling between £8,000 and £15,000.
The final price depends on factors like property size, system design, and whether upgrades are needed for radiators, hot water, or electrics.
After the £7,500 Boiler Upgrade Scheme, many homeowners pay significantly less — often closer to £3,500–£7,500 depending on the setup.
Boiler Upgrade Scheme
Eligible homeowners in England and Wales can currently get £7,500 off the cost and installation of an air source heat pump through the Boiler Upgrade Scheme.
Who Should (and Shouldn’t) Get a Heat Pump?
Heat pumps are a great option for many UK homes, but they aren’t the perfect fit in every situation.
Heat pumps work best if you:
- Have a well-insulated home (EPC rating C or above)
- Are replacing an older gas or oil boiler
- Live off-grid replacing an LPG boiler. Read our LPG to heat pump guide.
- Have space for an outdoor unit
- Plan to stay in your home long-term
They may not be ideal if you:
- Live in a poorly insulated property without upgrades
- Expect instant high heat like a traditional boiler
- Have limited outdoor space
Many homes that seem unsuitable at first can still work well with the right setup. If you’re unsure, it’s worth comparing installation options alongside running costs and available grants.
Typical Heat Pump Installation Costs by Property Type (UK)
This gives a rough guide to the kind of total installed cost many homeowners might expect before grants.
| Property Type | Typical Installed Cost | Likely Complexity |
|---|---|---|
| 2-bed house | £8,000 – £10,000 | Usually lower if existing system is straightforward |
| 3-bed house | £9,500 – £12,500 | Most common retrofit bracket |
| 4-bed house | £11,000 – £15,000+ | Often needs larger system and more upgrades |
| Larger / complex homes | £15,000+ | More likely to need wider system changes |
What This Means for Your Home
While averages are useful, your actual quote will depend on how your home compares to typical UK setups.
- If you live in a modern 2–3 bed home: You’ll likely sit toward the lower to mid range, especially if your current heating system is straightforward.
- If you have a standard 3-bed semi: see our dedicated guide to heat pump costs for a 3-bed house in the UK
- If you own a larger or older property: Costs are more likely to sit at the higher end due to system sizing and potential upgrades.
The biggest cost differences usually come down to insulation, radiator suitability, and overall system design — not just the size of the property.
If you want a clearer picture of long-term value, it’s worth comparing heat pump running costs alongside installation price.
What Is Included in the Price?
A full air source heat pump installation often includes much more than just the outdoor unit. A proper quote may include:
- Outdoor heat pump unit
- Indoor components and controls
- Hot water cylinder where required
- Pipework, valves, and fittings
- Installation labour
- Electrical connections and isolators
- Commissioning and setup
Some quotes also include radiator upgrades, buffer tanks, magnetic filters, and smart controls, while others price these separately. That’s one reason quotes can vary so much even when two installers appear to be offering a similar system.
The quality of the controls included can make a real difference to performance, which is why many homeowners also compare the best smart thermostats for heat pumps before making a final decision.
What Increases the Cost of a Heat Pump Installation?
Many of these factors also affect long-term performance, which is why installation cost should always be considered alongside running costs and system efficiency.
1. Property Size
Larger homes usually need larger systems, higher output, and sometimes more extensive emitter upgrades. That pushes up both equipment and labour costs.
2. Radiator Upgrades
Heat pumps usually work best at lower flow temperatures, so some homes need larger radiators or additional emitters to heat rooms properly. If you are unsure whether your current setup is suitable, read our guide on whether you need new radiators for a heat pump.
3. Hot Water Cylinder
If you are replacing a combi boiler, you may also need a hot water cylinder and related plumbing work. This is one of the biggest extra costs in many retrofit projects. See Combi Boiler to Heat Pump UK.”
4. Electrical Work
Some installations need additional electrical work such as an isolator, upgraded consumer unit arrangements, or other electrical alterations.
5. Installation Complexity
Older homes, difficult access, awkward layouts, long pipe runs, and unusual system designs can all increase labour time and total cost.
Installation complexity can also affect long-term performance, which is why system design matters just as much as the upfront quote. You can see how this affects real-world ownership in our Heat Pump Running Costs guide.
Typical Extra Costs to Consider
| Extra Item | Typical Cost Range | Why It Might Be Needed |
|---|---|---|
| Radiator upgrades | £500 – £2,500+ | To improve performance at lower flow temperatures |
| Hot water cylinder | £800 – £2,000+ | Usually needed when replacing a combi boiler |
| Electrical upgrades | £300 – £1,500+ | Depends on current electrical setup |
| Magnetic filter / system extras | £100 – £500+ | Helps protect the system and improve longevity |
| Insulation improvements | Varies widely | May be needed to get the best performance |
How Much Does the Boiler Upgrade Scheme Reduce the Cost?
The Boiler Upgrade Scheme can make a major difference to the real out-of-pocket cost of switching to a heat pump. In England and Wales, eligible homeowners can currently get £7,500 off the cost and installation of an air source heat pump.
That means a system costing £11,000 in total could effectively come down to around £3,500 before any unrelated extras outside the installer’s quote.
Heat Pump Cost vs Gas Boiler
Heat pumps usually cost more to install than a gas boiler, but the comparison is not just about upfront price. Heat pumps can offer lower carbon emissions, better long-term efficiency, and potentially lower running costs in well-designed systems.
Still using a gas boiler? Read our guide to replacing a gas boiler with a heat pump including radiator upgrades, hot water changes and installation costs.
Gas Boiler
- Lower upfront replacement cost
- Usually simpler installation
- Familiar for most homeowners
Heat Pump
- Higher upfront installation cost
- Eligible for grants
- Potentially better long-term efficiency
For a more detailed breakdown, see our comparison of heat pump vs gas boiler costs.
How to Get Better Value from a Heat Pump Installation
If you want the best return from your investment, focus on the overall system rather than chasing the lowest headline quote.
- Make sure the system is correctly sized
- Do not choose on brand alone
- Check whether radiators are suitable at lower temperatures
- Improve insulation where it makes sense
- Use good controls and smart thermostats designed for heat pumps
- Look carefully at what is and is not included in each quote
Before You Choose a System
Cost is only one part of the decision. The type of heat pump you choose can affect performance, noise levels, controls, and long-term efficiency.
That’s why many homeowners compare brands first, then look more closely at total installation cost once they understand the trade-offs.
A lower-priced installation can cost more in the long run if the system is undersized, badly commissioned, or paired with poor controls. Always compare installation cost and running cost together, not in isolation.
Frequently Asked Questions
How much does an air source heat pump cost in the UK?
For many homes, a typical full installation lands around £11,000, though real projects often fall somewhere between about £8,000 and £15,000 depending on property size and complexity.
Does a heat pump always cost more than a boiler?
Yes, upfront installation is usually higher, but grants can reduce the difference significantly and long-term performance may be better in a well-designed system.
What adds most to the cost?
The biggest extras are usually radiator upgrades, a hot water cylinder, electrical work, and any added complexity in the installation.
How much is the Boiler Upgrade Scheme?
Eligible homeowners in England and Wales can currently get £7,500 off the cost and installation of an air source heat pump.
Related Guides
Next Step
Once you understand installation costs, the next step is comparing running costs and the products that can improve comfort and efficiency.