HEAT PUMPS GUIDE
Heat Pump Cost 2026: Prices, Grants & What to Expect
A typical air source heat pump costs £10,000 to £14,000 installed in 2026, but the Boiler Upgrade Scheme knocks £7,500 off that price.
A typical air source heat pump costs £10,000 to £14,000 installed in 2026, but the Boiler Upgrade Scheme knocks £7,500 off that price.
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A typical air source heat pump costs £10,000 to £14,000 installed in 2026, but the Boiler Upgrade Scheme knocks £7,500 off that price. So you're looking at £2,500 to £6,500 out of pocket for most homes. Ground source systems cost more, running £20,000 to £35,000 before the same £7,500 grant. Here's what actually drives the price and how to keep yours as low as possible.
£12,000. That's roughly what the average air source heat pump installation costs right now, according to MCS installer data.
But "average" hides a lot. A simple swap in a well-insulated semi with existing radiators might come in at £10,000. A larger detached property needing new pipework, a hot water cylinder, and bigger radiators could hit £14,000 or more. Ground source heat pumps sit in a different bracket entirely, typically £20,000 to £35,000 depending on whether you're drilling boreholes or laying horizontal loops across your garden.
Here's the breakdown most people actually want to see:
| System type | Typical cost (installed) | After BUS grant |
|---|---|---|
| Air source heat pump (ASHP) | £10,000–£14,000 | £2,500–£6,500 |
| Ground source heat pump (GSHP) | £20,000–£35,000 | £12,500–£27,500 |
| Air-to-air heat pump | £5,000–£9,000 | £2,500–£6,500 |
Those post-grant figures assume you qualify for the Boiler Upgrade Scheme, which most homeowners with a gas or oil boiler do. More on that in a moment.
One thing we see constantly: people comparing heat pump prices to a £2,500 gas boiler replacement and feeling sick. But that comparison misses the point. A heat pump replaces your heating system for 20+ years, cuts your carbon emissions by roughly 50-70%, and protects you from gas price volatility. The upfront cost is real, but so is the context.
Not all quotes are equal, and the gap between the cheapest and most expensive installation we've seen for similar-sized homes is genuinely startling. Sometimes £5,000 or more.
So what's driving that variation?
Your existing heating system matters most. If you've already got a hot water cylinder and decent-sized radiators, the installer can often connect the heat pump without ripping out half your house. If you're coming from a combi boiler with no cylinder and small radiators throughout, you're adding £2,000 to £4,000 in ancillary work before anyone even touches the heat pump unit itself.
Property size is obvious but worth stating: a 2-bed terrace needs a smaller unit (5-7kW) than a 4-bed detached (10-14kW), and the price scales accordingly.
Then there's insulation. A heat pump works best in a well-insulated home because it produces heat at lower temperatures than a gas boiler. If your walls and loft aren't up to scratch, a good installer will tell you to sort your insulation first rather than just fitting a bigger, more expensive unit. That's honest advice, even if it delays the project.
Other factors that push the price up:
And one that pulls it down: if your local authority area has additional funding through the Warm Homes: Local Grant, you might stack that on top of BUS. Availability varies wildly by council, but it's worth checking.
Right, this is where it gets genuinely interesting.
The Boiler Upgrade Scheme is the big one. It gives you £7,500 off an air source or ground source heat pump, £5,000 off a biomass boiler, and £2,500 off an air-to-air system or heat battery. The scheme runs until 2030 under the Warm Homes Plan, and your installer applies on your behalf. You don't fill in forms or wait for approval before work starts. The grant comes off your invoice directly.
Who qualifies? Almost everyone. You need a property in England or Wales, you need to be replacing a fossil fuel heating system (gas, oil, LPG, or electric storage heaters), and the installation must be done by an MCS-certified installer. There's no income test. No means testing. A household earning £150,000 gets the same £7,500 as one earning £25,000.
That feels slightly odd from a fairness perspective, but from a "getting heat pumps into homes" perspective, it works. Take-up has accelerated significantly since the grant increased from £5,000 to £7,500 in late 2024.
Beyond BUS, two other routes exist:
ECO4 can fund a heat pump entirely for households receiving qualifying benefits like Universal Credit, Pension Credit, or Child Tax Credit. The scheme runs until December 2026 and covers the full installation cost. We've written about free boiler replacements in detail, and much of that eligibility logic applies to heat pumps too.
Warm Homes: Local Grant operates through local authorities and targets homes with EPC ratings of D or below. Funding amounts vary by area. Some councils offer £5,000 to £10,000 towards heat pumps specifically. Others focus on insulation. The scheme runs until 31 March 2028.
Here's the honest bit: stacking grants is technically possible but practically difficult. BUS and ECO4 can't be combined on the same measure. BUS and Warm Homes: Local Grant sometimes can, depending on your local authority's rules. Always ask your installer which combination works in your area.
For most homes, air source. Full stop.
Not because ground source is bad. It's actually more efficient, with a typical coefficient of performance (COP) of 4.0 compared to 3.0-3.5 for air source. That means for every 1kW of electricity it uses, it produces 4kW of heat. Over 20 years of running costs, that efficiency gap adds up to real money.
But the installation cost difference is enormous. You're paying £10,000 to £20,000 more upfront for ground source, and the grant is the same £7,500 either way. To recoup that extra investment through lower running costs alone takes 15 to 25 years depending on your electricity tariff and how much heat you use. Most people would rather invest that £15,000 difference in solar panels and a battery to reduce their electricity costs across the board.
Ground source makes sense in specific situations: large rural properties with plenty of land, new builds where trenching is cheap because the ground's already dug up, or homes with no gas connection where the alternative is expensive oil. We've covered the full picture in our ground source heat pump guide.
For a 3-bed semi on a normal residential street? Air source, every time.
Honestly, this one depends on your situation and we can't give you a straight answer without knowing what you're replacing.
Replacing an old oil boiler? You'll almost certainly save money. Oil costs roughly 7-8p per kWh, and a heat pump running at a COP of 3.0 effectively costs you about 8p per kWh of heat at current electricity prices (24p ÷ 3). Factor in that oil boilers are typically 85% efficient at best, and the heat pump wins comfortably. We're talking £300 to £600 savings per year for a typical home.
Replacing a modern gas boiler? The maths is tighter. Gas costs around 6-7p per kWh. A 92% efficient gas boiler produces heat at roughly 7.5p per kWh. A heat pump at COP 3.0 on standard-rate electricity produces heat at about 8p per kWh. That's basically a draw, or slightly more expensive.
But here's what changes the calculation: if you're on a heat pump tariff (Octopus offer one at around 7p per kWh off-peak), your effective heating cost drops to about 2.3p per kWh of heat. That's cheaper than gas by a massive margin. Suddenly you're saving £400 to £800 per year.
The other thing nobody mentions: gas standing charges. If a heat pump means you can disconnect from gas entirely, you save £100+ per year in standing charges alone. That's not nothing.
A digression, briefly: the government's plan to rebalance electricity and gas prices by shifting policy costs off electricity bills would make heat pumps obviously cheaper to run than gas for everyone. That's been promised since 2021 and hasn't happened yet. Don't base your decision on it. But if it does happen, heat pump owners benefit massively.
Three quotes minimum. Always.
We cannot stress this enough. The variation between installer quotes for the same property is wild. We've seen £9,500 and £15,000 quoted for the same 3-bed house, same heat pump brand, same scope of work. The expensive quote included "contingency" padding and a premium for the installer's brand name. The cheaper one was from a smaller local company with identical MCS certification.
What to look for in quotes:
If a quote doesn't include a heat loss calculation, walk away. Any installer who sizes a heat pump based on "what your old boiler was" rather than a proper room-by-room calculation is guessing, and you'll either get a system that's too small (cold house) or too big (wasted money and cycling issues).
Our heat pump installation guide walks through the full process from survey to commissioning. Worth reading before your first installer visit.
Look, the brands matter less than people think. Vaillant, Mitsubishi, Daikin, Samsung, and Grant all make reliable units. The quality of the installation matters far more than the badge on the box. A perfectly good Samsung unit installed badly will perform worse than a mid-range unit installed by someone who really knows what they're doing.
So prioritise installer reputation. Check MCS registration (non-negotiable for the grant). Read reviews. Ask how many heat pumps they've installed in the last 12 months. If the answer is under 20, consider whether they have enough experience with your type of property.
One final thing: don't rush. The BUS grant runs until 2030 under the Warm Homes Plan. You have time to get this right. A heat pump installed well will heat your home for 20 years. Spending an extra month getting quotes and checking references is time well invested.
Common questions