How much does a heat pump cost in 2026? An honest guide for UK homeowners

Ask this question online and the first thing you’ll notice is how different the answers are. One site says £5,000. Another says £18,000. A third says “it depends” and then doesn’t tell you what it depends on. None of that is much use if you’re a homeowner trying to work out whether a heat pump is within reach this year.

So here’s the honest version, written to be the one guide you need: real cost ranges by home size, what moves the price up or down, how the £7,500 government grant is applied, and the questions worth asking before you sign anything. Last checked: October 2026.

The quick answer

A typical air source heat pump installation in the UK in 2026 costs between £8,000 and £15,000 before the government grant, and between £500 and £7,500 after it, depending on the size and setup of your home.

A 1–2 bed flat sits at the lower end. A 4-bed detached house sits at the upper end. A 3-bed semi, the most common UK home, lands somewhere in the middle.

That’s the headline. The rest of this guide is the detail behind it: what you’d pay for your home, what adds to the cost, and what to watch out for.

Heat pump cost by home size

The single biggest factor in what a heat pump costs is the size of your home. A bigger home loses more heat on a cold day, needs a bigger heat pump to keep up, and usually involves more radiators, more pipework and a bigger hot water cylinder.

Here’s what you can realistically expect to pay in 2026 for an air source heat pump, before and after the £7,500 Boiler Upgrade Scheme grant is applied.

These are realistic ranges for a straightforward install in a reasonably well-insulated home with existing radiators in roughly the right places. If your home needs significant extra work (more on that in the next section), the final figure can land higher. If your home is particularly well suited, with good insulation, suitably sized radiators and space for a cylinder, you may land towards the bottom of each range.

One honest caveat: the post-grant figure for a flat looks small on paper, but very few flats are suitable for a heat pump in the first place. Service charges, outdoor space and shared infrastructure often rule them out. If you’re in a flat, these numbers apply to the ones where an install is practical, which isn’t every flat. Our guide to whether your home is suitable for a heat pump explains what a surveyor checks.

What pushes the price up or down

Two homes the same size can end up with very different quotes, and the reason is almost always what sits around the heat pump rather than the unit itself. Here’s what moves the number.

Radiators. A heat pump sends warm, not scorching, water around your home, usually at a lower temperature than a gas boiler does. That gentler warmth means each radiator gives off a little less heat, so some rooms may need bigger radiators to feel just as cosy. It’s rarely a whole-house job, and most homes only need two or three swapped, but it adds to the quote.

Hot water cylinder. A heat pump heats your hot water in advance and stores it in a cylinder, rather than making it on demand like a combi boiler. If you already have a cylinder, great. If you’ve got a combi and no tank, you’ll need to add one. Modern cylinders are slimmer and better insulated than the big copper ones you might remember, but they still need somewhere to live, and that adds to the install.

Pipework. Older or undersized pipes sometimes need upgrading to move the right volume of water around the system efficiently. Not every home needs this, but it’s a common surprise cost worth asking about upfront.

Emitters (the things that put heat into your rooms). Standard radiators are the usual answer. Underfloor heating or fan coil units are a lovely finish but add noticeably to the cost: worth it in a renovation, usually overkill as a straight heat pump upgrade.

Insulation. A poorly insulated home needs a bigger, more expensive heat pump to keep up. Topping up your loft insulation first, one of the cheapest home improvements going, can shrink the size and cost of the heat pump you end up needing.

Electrical upgrades. Occasionally a home needs a new consumer unit or a dedicated electrical circuit to run the heat pump safely. A good survey flags this early rather than as a surprise mid-install.

None of these are dealbreakers. They’re the honest reasons two quotes for the “same” job can look different, and knowing about them before you ask for a quote means fewer surprises when the itemised breakdown lands.

What about ground source heat pumps?

Most of this guide is about air source heat pumps, because that’s what most UK homes end up with. Ground source comes up often enough to be worth a brief mention, though.

A ground source heat pump pulls heat from pipes buried in your garden or from a borehole drilled deep underground. The equipment itself isn’t dramatically more expensive than air source; it’s the groundworks that push the price up.

Expect to pay £18,000 to £30,000 for a ground source install before the grant. The same £7,500 BUS grant applies, so the real-world cost is roughly £10,500 to £22,500 after it.

The upside is efficiency. Ground source systems typically run slightly more efficiently than air source, especially in cold weather, because the ground stays warmer than the winter air. The practical downside is that you need the land: enough garden for buried loops, or room for a drilling rig to put in a borehole. If you’ve got the space and plan to stay in the home a long time, the maths can work. For most UK homes, especially smaller ones, air source is the sensible answer.

How the £7,500 grant works

The Boiler Upgrade Scheme (usually just called the BUS grant) is the government’s way of making heat pumps affordable in England and Wales, and it’s much simpler to use than most grant schemes you’ll have come across.

You don’t apply for it yourself. Your installer applies on your behalf as part of the quote and install process, and the grant is taken off your invoice before you pay. You never hand over the full pre-grant price and then wait months to get £7,500 back: the installer handles the whole thing, and you only ever pay the post-grant figure.

To qualify, your installation needs to be done by an MCS-certified installer, and your home needs to meet the scheme’s eligibility rules. Those rules are simpler than they used to be: the grant no longer depends on having a valid EPC or on first completing loft and cavity wall insulation.

One important footnote: if your home is off the gas grid and currently heated by oil or LPG, the grant rises to £9,000 rather than £7,500. The higher amount came in on 21 July 2026 and is currently available until 31 March 2027. If that’s you, factor the bigger figure in when you read the cost table above.

How to get a like-for-like quote

Comparing heat pump quotes is only useful if the quotes are pricing the same thing. Here’s how to make sure yours are.

• Give every installer identical information. Same home details, same current heating setup, same level of insulation. If one installer surveys properly and another just estimates from your postcode, you’re not comparing like with like. You’re comparing a thorough quote with a guess.
• Ask for an itemised breakdown, not one lump sum. Equipment, labour, any radiator or cylinder upgrades, pipework, electrical work and VAT should all appear as separate lines. If something later needs clarifying, this is the only version that lets you check it.
• Confirm the grant is applied in the quote. The headline price should be the post-grant figure, with the pre-grant figure shown separately. If a quote only shows the pre-grant number and mentions the £7,500 vaguely as “available later”, ask directly.
• Check MCS certification. Every legitimate installer can give you their MCS certificate number without hesitation. Without it you can’t get the grant, and you’re also without the industry’s main consumer protection if something goes wrong.
• Compare efficiency and warranty, not just price. A slightly cheaper heat pump with a lower efficiency rating (COP) and a shorter warranty is rarely the better buy over the 20-year life of the system.

What a proper itemised quote looks like

To give you something concrete to measure your own quotes against, here’s an example of a fully itemised breakdown for a typical 3-bed semi air source install. It’s the format a good installer should give you, with everything separated and the grant shown as its own line.

Your own quote won’t match this exactly, because every home is different, but the shape should look the same. If a quote arrives as a single lump sum with nothing broken down beneath it, that’s the moment to ask for the itemised version. A reputable installer will send it without question.

Frequently asked questions

Can I combine the BUS grant with other funding? Sometimes, yes. Certain local authority schemes and energy company grants can be combined with the BUS, though eligibility rules vary and the combinations change from year to year. Check with both your installer and your local council before assuming.

How long does the BUS grant process take? Typically 2–8 weeks from application to approval, and your installer manages the whole process for you. It’s the main reason many installs have a lead time of several weeks between quote and installation: the paperwork is quietly happening in the background.

Do I need planning permission for a heat pump? For most homes in England and Wales, no. Air source heat pumps fall under permitted development, which means you can install one without a formal planning application. There are a few exceptions (listed buildings, some flats, some conservation area properties), and ground source occasionally needs permission in protected areas. Your installer should flag any of this at survey stage.

How long does the installation itself take? Air source heat pumps typically go in over 2–5 days. Ground source takes considerably longer, usually 1–3 weeks, because of the groundworks involved. In most cases the paperwork before installation day takes longer than the install itself.

How long does a heat pump last? A well-installed and properly serviced heat pump typically lasts 15–20 years, roughly comparable to a modern gas boiler. The key words there are “properly serviced”: most manufacturer warranties depend on an annual service, so skipping it is a false economy.

For more detail, see our guides to planning permission for heat pumps and how long a heat pump installation takes.

The honest verdict

A heat pump in 2026 is still a significant purchase. For a typical 3-bed semi you’re looking at somewhere between £2,500 and £5,500 out of pocket after the grant: real money, but a long way from the sticker shock of the pre-grant headline figure. For a 1–2 bed flat the figure is often lower; for a 4-bed detached house, often higher.

The spread in these ranges isn’t a cop-out. It’s the honest reality that your home is specific, and the only number that really matters is the one that applies to it. The upfront cost is also only half the picture, so it’s worth reading what homeowners are paying to run a heat pump in 2026 too.