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Air Source Heat Pump Cost in 2026: Installation, Running & Net Price After the Grant
An air source heat pump typically costs £8,000–£15,000 to install in 2026 — but the £7,500 Boiler Upgrade Scheme grant cuts the net price most homeowners actually pay to roughly £2,500–£6,500, and sometimes far less. This guide leads with that net figure, then covers running costs, the hidden extras most quotes leave out, and the honest payback numbers.
Quick answer
In 2026 an air source heat pump costs £8,000–£15,000 to install before any grant. Subtract the £7,500 Boiler Upgrade Scheme grant (England & Wales) and the net price you actually pay is usually £2,500–£6,500 — and well-suited smaller homes can land near £500–£1,500. Running cost is roughly £855–£1,700 a year depending on home size.
The grant is applied by your MCS-certified installer and deducted straight off the invoice, so you never pay the full amount upfront. Scotland and Wales have their own schemes. Watch the "extras" — new radiators, a cylinder or a fuse-board upgrade can sit outside the headline quote. Figures here are indicative UK 2026 ranges — always confirm with a fixed quote after a survey.
This guide is information, not financial or gas-safety advice. Heat pump prices are indicative UK 2026 ranges and vary with your property, survey and installer — always get a fixed quote after an in-home heat-loss survey. Any electrical, gas, refrigerant or installation work should be carried out by a suitably qualified, MCS-certified or Gas Safe registered engineer — never attempt gas, burner, flue, sealed-circuit or refrigerant work yourself. If you smell gas or suspect carbon monoxide, leave the property and call the National Gas Emergency line on 0800 111 999.
Air source heat pump cost at a glance (2026)
Here is the headline most comparison pages bury. The number that matters is not the sticker price — it is the net price after the grant.
| Stage | Typical 2026 figure (UK) |
|---|---|
| Install before grant (air-to-water) | £8,000 – £15,000 |
| Boiler Upgrade Scheme grant (England & Wales) | – £7,500 |
| Net price you actually pay | £2,500 – £6,500 (small, well-suited homes ~£500–£1,500) |
| Running cost per year | £855 (1-bed) → £1,700 (4+ bed) |
| Annual service | £150 – £300 |
| Lifespan | 15 – 20 years |
VAT on heat pump supply and installation is also 0% until 31 March 2027, which is already reflected in installer quotes. All figures last checked 2026 — confirm current numbers with your installer.
How much does an air source heat pump cost to install in 2026?
Most UK air-to-water installations cost £8,000–£15,000 before grants. Larger or harder properties (for example a 16kW unit for a 4–5 bed home) can be quoted up to around £16,500. Ofgem's own scheme data put the average installation at roughly £12,500 in early 2026.
A standard installer quote usually includes the heat pump unit, a hot water cylinder, basic pipework, controls, commissioning and the MCS paperwork needed to claim the grant.
What it often does not include are radiator upgrades, a fuse-board upgrade, underfloor heating or scaffolding. We cover those "extras" in detail below — they are the single biggest reason a real bill differs from a headline price.
Air source heat pump cost by property size & kW
Heat pumps are sized in kilowatts (kW) based on your home's heat loss, not just bedroom count. A proper survey decides the size — the same logic applies to sizing your system in kW.
| Property | Typical heat pump size | Install before grant |
|---|---|---|
| 1–2 bed flat / small house | 4–6 kW | £7,000 – £9,000 |
| 3-bed semi | 6–10 kW | £8,000 – £11,000 |
| 4+ bed detached | 10–14 kW | £10,000 – £13,000+ |
| Large 4–5 bed | 14–16 kW | up to ~£16,500 |
An oversized unit costs more and runs less efficiently, so a careful heat-loss survey saves money twice over. These are indicative ranges only — your actual quote depends on the survey.
Air-to-water vs air-to-air vs hybrid vs ground source
"Air source heat pump" usually means air-to-water — it heats your radiators and hot water like a boiler does. The other options differ in cost and what grant they attract.
| System | What it does | Typical install (before grant) | BUS grant (Eng & Wales) |
|---|---|---|---|
| Air-to-water | Radiators + hot water | £8,000 – £15,000 | £7,500 |
| Air-to-air | Warm/cool air, no hot water | £3,000 – £7,000 | £2,500 |
| Hybrid (heat pump + fossil-fuel boiler) | Heat pump kept alongside a gas/oil boiler | £8,000 – £14,000 | Not eligible |
| Ground source | Buried loops; very efficient | £18,000 – £35,000+ | £7,500 |
| Biomass (rural, off-grid only) | Wood-pellet boiler | £10,000 – £20,000 | £5,000 |
Important correction many sites get wrong: hybrid systems that keep a fossil-fuel (gas or oil) boiler as a backup or secondary heat source are not eligible for the Boiler Upgrade Scheme — GOV.UK and Ofgem are explicit on this. The grant only covers air-to-water, air-to-air, ground/water source heat pumps and biomass. For most homes swapping a gas boiler, air-to-water plus the £7,500 grant is the sweet spot.
The £7,500 Boiler Upgrade Scheme grant — how it cuts the price
The £7,500 Boiler Upgrade Scheme (BUS) is the main reason a heat pump is now affordable for many households in England and Wales. It now runs to 2030.
- Worth £7,500 off an air-to-water or ground source heat pump (£5,000 biomass, £2,500 air-to-air).
- Applied by your MCS-certified installer and deducted from your invoice — you never handle the cash.
- The previous requirement to clear outstanding loft/cavity insulation recommendations on your EPC was removed in the April 2026 update, so a valid EPC with insulation notes no longer blocks the grant on its own (your installer will still advise on insulation for performance). Confirm current eligibility on GOV.UK before ordering.
- One grant per property, for England and Wales only.
Off-grid uplift (2026): from 21 July 2026 a temporary uplift raises the grant to £9,000 for eligible homes currently heated by oil or LPG that are off the gas grid, expected to run until the end of March 2027. If you are on oil or LPG, it is worth checking whether you qualify.
Because the installer claims it for you, the only number you pay is the net figure on your quote.
Net price after the grant — what you actually pay
This is the figure to budget around. Below are worked examples by home size, assuming a standard install with no major extras.
| Home | Install | Less BUS grant | Net you pay |
|---|---|---|---|
| 1–2 bed, well-insulated | £8,000 | – £7,500 | ~£500 |
| 3-bed semi (typical) | £10,000 | – £7,500 | ~£2,500 |
| 4-bed detached | £12,500 | – £7,500 | ~£5,000 |
| Large 4–5 bed | £14,000 | – £7,500 | ~£6,500 |
So the realistic "what you actually pay" band is £500–£6,500. If your quote includes new radiators or a cylinder, add those on top — see the hidden-costs section.
Regional grants: Scotland, Wales & Northern Ireland
The BUS covers England and Wales. The devolved nations have their own — often more generous — support.
- Scotland: the Home Energy Scotland grant offers up to £7,500 (plus a £1,500 rural/island uplift, so up to £9,000 in remote areas) and an optional interest-free loan of up to £7,500 toward the rest. Warmer Homes Scotland can provide higher levels of support for eligible low-income households.
- Wales: Welsh homeowners can use the £7,500 BUS, and eligible households may also access the Nest scheme for energy-efficiency support — check current eligibility, as amounts and measures vary.
- Northern Ireland: the BUS does not apply; support is more limited, so check current NI Sustainable Energy Programme schemes locally.
Some households can also access free heating grants under ECO4 depending on benefits and property type. Eligibility rules change — confirm current details on the relevant official scheme page.
Hidden & "extra" costs most quotes leave out
This is where many homeowners get caught. The headline install rarely tells the whole story, and these line items are often quoted separately.
| Extra | Why it's needed | Indicative cost |
|---|---|---|
| Radiator upgrades | Heat pumps run cooler, so some rooms need bigger radiators | £1,500 – £3,500 |
| Hot water cylinder | Combi-boiler homes usually need one fitted | £800 – £1,800 |
| Electrical / fuse-board upgrade | Older consumer units may not support the load | £300 – £1,000 |
| Pipework | Larger-bore pipe for lower-temperature flow | £500 – £2,000 |
| Scaffolding | Access for cylinder/pipework on some homes | £300 – £900 |
| Underfloor heating (optional) | Ideal low-temperature emitter | £3,600 – £9,000 |
The room-by-room heat-loss survey decides how many radiators actually change — sometimes only two or three, not the whole house. Always ask for these as itemised lines so you can compare quotes fairly. Installer-owned pages tend to downplay them; a proper survey is the only honest way to know.
Running costs: heat pump per year vs a gas boiler
A heat pump runs on electricity, which costs more per unit than gas — but it delivers several units of heat per unit of electricity, which offsets that.
| Fuel (Ofgem cap, Apr–Jun 2026) | Unit rate |
|---|---|
| Electricity | 24.67p / kWh |
| Gas | 5.74p / kWh |
Those are the Ofgem price-cap unit rates for 1 April–30 June 2026 (direct debit, averaged across regions, incl. VAT); rates change each quarter and vary by region and tariff. The key efficiency number is the heat pump's SCOP/COP — for every 1 unit of electricity it produces around 2.5–3.5 units of heat. You want a COP of 3 or above to be near parity with gas, because electricity is roughly four times the price of gas per unit.
| Home | Gas boiler / yr | Heat pump / yr |
|---|---|---|
| 2-bed terrace | £360 | £493 |
| 3-bed semi | £541 | £740 |
| 4-bed detached | £689 | £987 |
So against an efficient new gas boiler, a heat pump can cost a little more to run today. Where it tends to win is against G-rated old gas, oil, LPG and electric storage heaters — savings vary widely by home and tariff, so treat any single figure as indicative. For more, see heat pump vs gas boiler running costs and what gas central heating costs to run.
Heat pump vs gas boiler: total cost of ownership over 10–15 years
Most pages compare either install or running cost. The fairer view is the full lifetime picture — and it changes the verdict.
| Cost element | New gas boiler (3-bed) | Air source heat pump (3-bed) |
|---|---|---|
| Install (net) | ~£3,000 | ~£2,500 (after £7,500 grant) |
| Running cost, 15 yrs | ~£8,100 (£541/yr) | ~£11,100 (£740/yr) |
| Servicing, 15 yrs | ~£1,800 | ~£2,700 |
| Lifespan | 10–15 yrs (likely 1 replacement) | 15–20 yrs |
| Indicative 15-yr total | ~£15,900+ | ~£16,300 |
These are illustrative figures at today's price ratios and will shift with energy prices and your usage. The two land remarkably close once the grant and boiler-replacement cycle are included. With the future of gas boilers and the planned UK gas boiler rules pointing away from fossil heating, the long-term gap is widely expected to narrow further. Compare against the cost of a new gas boiler and a standard boiler installation for your own home.
Servicing, maintenance & lifespan
Heat pumps are low-maintenance but not no-maintenance. Budget £150–£300 a year for an annual service, which keeps the warranty valid and efficiency high.
- Lifespan: 15–20 years, longer than a typical gas boiler.
- Warranty: often 5–10 years if serviced annually by an approved engineer.
- DIY limits: you can safely keep leaves and debris clear of the outdoor unit and check it is not iced over. Refrigerant, electrical and sealed-system work must be left to a qualified engineer — these are not DIY jobs.
Payback period & savings — the honest numbers
Payback depends heavily on what you are replacing, your tariff and how well your home holds heat, so treat these as broad illustrations rather than promises.
- Replacing old, inefficient gas/oil/LPG: payback can be in the region of 10–15 years with the grant, sometimes sooner against LPG or electric.
- Replacing an efficient modern gas boiler: payback can stretch well beyond 15 years — or never on running cost alone at current price ratios.
The honest take: a heat pump is often a strong financial choice if you are off the gas grid or on old/expensive fuel, and more of a comfort/carbon choice (not always a pure savings one) if you already have efficient gas. Run your own numbers with a quote before deciding.
Financing & paying monthly
The net price after the grant can often be spread. Options can include 0% or low-rate manufacturer/installer finance, the Scottish interest-free loan, or a personal/green loan.
Spreading a ~£2,500–£6,500 net cost over a few years can make a heat pump cost less per month than the old boiler it replaces, though total interest and terms vary. Finance is a regulated product — check the APR, total repayable and your own circumstances, and seek independent advice if unsure. See financing it with pay-monthly deals for how these arrangements work.
Do you need planning permission?
For most homes in England, no. Permitted-development rules were relaxed on 29 May 2025: the old 1-metre boundary rule was scrapped, the size limit raised (to 1.5m³ for houses; flats remain 0.6m³), and up to two units are now allowed on detached homes as permitted development. Installations must still meet the MCS 020 noise standard.
You should still check before ordering if your home is listed, in a conservation area, or a flat/leasehold (where separate restrictions and consents can apply). Rules differ in Scotland, Wales and Northern Ireland — confirm with your local planning authority.
Is an air source heat pump worth it in 2026?
It depends on your home and what you are replacing.
- Off-grid / oil / LPG / electric heating: often a strong case on both cost and comfort — and the £9,000 off-grid uplift from July 2026 improves it further for oil/LPG homes.
- Well-insulated home on old gas: strong case, especially where the net price lands near £500–£1,500.
- Efficient modern gas boiler, poorly insulated home: consider insulating first; the running-cost case is weakest here today.
The grant, 0% VAT and relaxed planning make 2026 one of the more affordable years yet to switch — but a heat pump only performs (and pays back) if it is correctly sized and your radiators can run at lower temperatures. Always base your decision on a fixed quote after an in-home survey.
About our boiler-cover recommendations. Where this site recommends boiler cover or heating-care plans, we feature a selected panel of providers, not the whole market, and may earn a commission if you take out a plan through our links — this never affects the price you pay. Indicative "from £X" prices are last checked 2026 and can change; always confirm current cover, terms and price on the provider's own page before buying. Note that some plans are FCA-regulated insurance while others are unregulated service or care plans — check which you are buying, as the protections differ. A heat pump install itself is not boiler cover.
Is an air source heat pump expensive to run?
Running cost is roughly £855 a year for a 1-bed up to about £1,700 for a 4+ bed home in 2026, depending on your home and tariff. It runs on electricity (24.67p/kWh under the Apr–Jun 2026 Ofgem cap) which costs more per unit than gas (5.74p/kWh), but a heat pump produces around 2.5–3.5 units of heat per unit of electricity, which largely offsets that. Rates change each quarter.
Is a heat pump cheaper to run than a gas boiler?
Against an efficient modern gas boiler, often slightly more expensive at current price ratios — for example a 3-bed semi might cost roughly £740/yr on a heat pump vs about £541 on gas. Against old G-rated gas, oil, LPG or electric storage heaters, a heat pump is usually cheaper. Actual savings vary widely by home, insulation and tariff, so treat any single figure as indicative.
Do I need new radiators for a heat pump?
Sometimes, but rarely all of them. Heat pumps run at lower temperatures, so a room-by-room heat-loss survey decides which radiators need upsizing — often just a few. Radiator upgrades typically cost £1,500–£3,500 and are usually quoted as a separate line item, not part of the headline price.
Is a hybrid heat pump (kept with a gas boiler) eligible for the grant?
No. The Boiler Upgrade Scheme does not cover hybrid systems that keep a fossil-fuel boiler — gas or oil — as a backup or secondary heat source, and GOV.UK is explicit on this. The £7,500 grant only applies to air-to-water, air-to-air (£2,500), ground/water source heat pumps and biomass (£5,000).
Do I need planning permission for an air source heat pump?
For most homes in England, no — permitted-development rules were relaxed on 29 May 2025, scrapping the 1-metre boundary rule, raising the size limit and allowing up to two units on detached homes. Installations must meet the MCS 020 noise standard. You should still check if your property is listed, in a conservation area, or a flat/leasehold, and confirm the rules for Scotland, Wales and NI locally.
Can I get an air source heat pump for free?
Not usually "free", but it can be close. A well-insulated smaller home can pay as little as roughly £500 net after the £7,500 Boiler Upgrade Scheme grant. Eligible low-income households in Scotland (Warmer Homes Scotland) or via ECO4 may have most or all of the cost covered — eligibility rules apply, so check the relevant official scheme.
How long does installation take?
A typical air-to-water installation takes around 2–5 days, depending on whether radiators, a cylinder, pipework or electrical upgrades are also being done. The MCS-certified installer handles the grant paperwork as part of the job.
Does an air source heat pump work in winter?
Yes. Air source heat pumps extract heat from outdoor air even at sub-zero temperatures and are designed for UK winters. Efficiency (COP) does dip in very cold weather, which is one reason correct sizing and a low-temperature radiator setup matter.
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Compare boiler coverThis article is general information, not financial or gas-safety advice. We compare a selected panel of providers, not the whole market, and may earn a commission if you buy through our links. Always have gas appliances checked and repaired by a Gas Safe registered engineer; in a gas emergency call 0800 111 999. Prices are indicative UK guides for 2026 — confirm current prices on the provider's own site.