HeatPumpHeat Pump Costs UK 2026 — What You'll Actually Pay
The honest answer: an air source heat pump costs £8,000 to £15,000 installed, or £2,500 to £7,500 after the BUS grant. Ground source systems cost more. Below, we break down exactly what drives the price — and where installers often add hidden costs.
Heat Pump Costs by Type
| System Type | Installed Cost | After BUS Grant | Best For |
|---|---|---|---|
| Air Source (ASHP) | £8,000 – £15,000 | £500 – £7,500 | Most homes — lower upfront cost, simpler install |
| Ground Source (GSHP) | £15,000 – £35,000 | £7,500 – £27,500 | Large gardens, rural properties, maximum efficiency |
| Hybrid (HP + Gas Boiler) | £5,000 – £10,000 | No BUS grant | Poorly insulated homes, gradual transition |
Important: Hybrid systems combining a heat pump with a gas boiler are not eligible for the BUS grant. Only standalone air source and ground source heat pumps qualify.
What Affects Your Heat Pump Installation Cost
No two installations are the same. Here are the main factors that push costs up or down:
1. Property Size and Heat Demand
A 2-bed flat might need a 5kW unit (around £8,000 installed), while a 4-bed detached house could need 12-16kW (£12,000-£15,000). The heat pump itself accounts for roughly 30-40% of the total cost — the rest is labour, ancillaries, and any upgrades needed.
2. Insulation Level
Well-insulated homes need smaller, cheaper heat pumps. If your walls and loft are poorly insulated, you may need a larger unit to compensate — or better yet, insulate first and save on both the heat pump size and running costs.
3. Existing Heating System
If you already have a wet central heating system with radiators, the installation is simpler. Homes converting from electric storage heaters or warm air systems will need new pipework throughout — adding £2,000 to £5,000.
4. Hot Water Cylinder
Heat pumps need a hot water cylinder (they cannot provide instant hot water like a combi boiler). If you don't already have one, budget £500 to £1,500 for supply and installation, plus finding space for it — typically an airing cupboard.
5. Radiator Upgrades
Because heat pumps run at lower flow temperatures, some existing radiators may be undersized. A full radiator upgrade costs £1,500 to £3,500, though many homes only need a few replaced. Your installer should do a room-by-room heat loss survey to determine this.
6. Scaffolding and Access
If the outdoor unit needs to be positioned at height or the property has difficult access, scaffolding adds £500 to £1,200. Most ground-floor installations avoid this cost entirely.
7. Ground Source Trenching or Boreholes
For GSHPs, horizontal trenches require a garden at least twice the floor area of your home. Vertical boreholes are an alternative for smaller plots but cost £5,000 to £15,000 for drilling alone. This is the main reason ground source costs so much more.
Regional Heat Pump Costs
Installation costs vary across the UK, driven by labour rates, installer competition, and property types. Here's what you can expect by region for a typical 3-bed semi-detached home with an air source heat pump:
| Region | Typical ASHP Cost | After BUS Grant |
|---|---|---|
| London | £11,000 – £16,000 | £3,500 – £8,500 |
| South East | £10,000 – £15,000 | £2,500 – £7,500 |
| South West | £9,500 – £14,000 | £2,000 – £6,500 |
| Midlands | £9,000 – £13,500 | £1,500 – £6,000 |
| North | £8,500 – £13,000 | £1,000 – £5,500 |
| Wales | £9,000 – £13,500 | £1,500 – £6,000 |
| Scotland | £9,000 – £14,000 | £1,500 – £6,500 |
Costs based on MCS installation data and installer quotes collected in early 2026. Scotland has its own grant scheme (Home Energy Scotland) offering up to £7,500 plus additional support for rural and island communities.
Are Heat Pump Prices Falling?
Yes, and meaningfully. Since 2022, average installation costs have dropped 15-20% as the UK market scales up. Several factors are driving this trend:
- Manufacturing scale: Major brands like Daikin, Mitsubishi, Vaillant, and Samsung are expanding UK-focused production lines.
- More installers: The number of MCS-certified heat pump installers has grown from around 3,000 in 2023 to over 5,000 in 2026. More competition means better prices.
- Government targets: The UK aims for 600,000 heat pump installations per year by 2028 (up from around 55,000 in 2023). Policy support and training programmes are accelerating the market.
- Supply chain maturity: Components like inverters, compressors, and refrigerants are becoming cheaper as global heat pump demand rises.
Industry analysts forecast a further 10-15% reduction by 2028. If you're on the fence, costs are unlikely to go up — but the BUS grant may not last forever (it's currently funded until March 2028).
How to Reduce Your Installation Cost
- Claim the BUS grant: £7,500 off your air source or ground source heat pump. Your installer handles the application.
- Get three quotes: Prices vary significantly between installers. Always get at least three quotes from MCS-certified installers.
- Insulate first: Better insulation means a smaller (cheaper) heat pump. A £2,000 loft and cavity wall insulation job could save you £1,500 on the heat pump itself.
- Keep existing radiators where possible: A good installer will calculate which radiators actually need upgrading rather than replacing them all.
- Consider timing: Spring and summer are quieter periods for installers. You may get better prices and faster installation outside the heating season.
Related Guides
BUS Grant Guide
How to claim the £7,500 Boiler Upgrade Scheme grant.
Running Costs
Annual running costs at different electricity tariffs.
Heat Pump vs Gas Boiler
Honest head-to-head comparison — when each option wins.
Heat Pump Radiators
Do you need to upgrade your radiators? What to expect.
Frequently Asked Questions
How much does an air source heat pump cost in 2026?
A typical air source heat pump installation costs between £8,000 and £15,000 before the BUS grant. After the £7,500 grant, most homeowners pay £2,500 to £7,500 out of pocket. The exact cost depends on your property size, insulation level, and whether you need new radiators or a hot water cylinder.
Why are ground source heat pumps so much more expensive?
Ground source heat pumps cost £15,000 to £35,000 because they require either horizontal trenches (needing a large garden) or vertical boreholes drilled 60-200 metres deep. The drilling or excavation work accounts for roughly 40-60% of the total cost. However, ground source systems are more efficient (COP 4.0-4.5 vs 3.0-3.5 for air source) and have lower running costs.
What is the BUS grant and how much does it cover?
The Boiler Upgrade Scheme (BUS) provides a £7,500 grant towards air source and ground source heat pump installations in England and Wales. Your MCS-certified installer applies on your behalf. The grant is deducted from your invoice — you never handle the money directly. See our full BUS grant guide for eligibility details.
Do I need to upgrade my radiators for a heat pump?
Not always. Heat pumps run at lower flow temperatures (35-45°C) than gas boilers (60-80°C), so some radiators may need upsizing to deliver enough warmth. A good installer will do a room-by-room heat loss calculation. Budget £1,500 to £3,500 if radiator upgrades are needed — though many homes only need a few swapped out, not all.
Are heat pump prices falling?
Yes. Heat pump prices have fallen roughly 15-20% since 2022 as the UK market grows. Manufacturers are scaling production, more installers are entering the market, and competition is driving costs down. Industry forecasts suggest a further 10-15% reduction by 2028 as installation volumes increase.