Heat pump costs in the UK (2026)

The headline question every homeowner asks: how much does a heat pump actually cost? The honest answer is "it depends on your property", but the ranges below cover most UK installs in 2026 and explain what drives a quote up or down.

Headline ranges

Ranges reflect 2026 quotes from MCS-certified installers. Source: Energy Saving Trust price guidance and average BUS-approved installer quotes published in trade press.

What drives the price within the range

Two installers can quote £4,000 apart on the same heat pump model. The differences are usually:

• Heat loss calculation. An accurate room-by-room MCS heat-loss survey lets the installer specify the smallest heat pump that meets your demand. Over-sized heat pumps cost more up front and cycle inefficiently.
• Radiator upgrades. Heat pumps run at lower flow temperatures than gas boilers. Some radiators may need to be bigger. Allow £200–£500 per radiator if any need replacing.
• Hot water cylinder. Almost every heat pump install needs a new hot water cylinder (~£800–£1,500 installed). Combi-boiler properties always need a new cylinder.
• Pipework and controls. The buffer tank, controls, weather compensation, and any plumbing rework can vary widely.
• Electrical works. Some installs need a consumer-unit upgrade or a dedicated supply. Allow £300–£1,500.
• Scaffolding and access. Tight terraced sites cost more than detached suburban ones.

Worked example: 3-bed semi, ASHP install

A typical 1990s 3-bed semi in the Midlands, with reasonable loft and cavity wall insulation:

Heat pump (8 kW ASHP, mid-market)

£3,400

Hot water cylinder (200 L, dual coil)

£1,100

Buffer / volumiser, pump, expansion vessel

£650

Two radiator upgrades

£600

Electrical works (consumer unit + isolators)

£550

Labour (3 person-days install + commissioning)

£3,200

Survey, design, MCS paperwork

£600

Margin + warranty + overhead

£1,900

Gross

£12,000

BUS grant

−£7,500

Net to homeowner

£4,500

Regional variation

Prices in 2026 are reasonably consistent across the UK, but with a few patterns:

• London and South East: ~10–15% premium on labour rates and access charges.
• Scotland (Highlands and Islands): Mobilisation costs and ferries can add £500–£2,000. The Home Energy Scotland grant offsets a lot.
• Northern Ireland: No BUS, no equivalent national grant, net costs are higher.
• Rural off-gas areas: Heat pumps often replace oil. The economic case is much stronger, and some installers offer rural-specific packages.

Ongoing costs

The capital cost is only one part. Running costs depend on electricity tariff and the heat pump's seasonal efficiency (SCOP). See our detailed running costs guide for the working.

Servicing is £150 to £250 a year. Refrigerant top-ups (typically every 7 to 10 years) cost £200 to £400.

How to sanity-check a quote against these ranges

If a quote lands well outside the ranges above, ask why before assuming it's a bargain or a rip-off. A quote significantly below £10,000 for a standard ASHP install often means something is missing, a hot water cylinder, radiator upgrades, or a proper heat-loss survey. A quote well above £14,000 for a straightforward semi might reflect a premium brand, complex electrical works, or simply a wide margin. Ask for the itemised breakdown shown in the worked example above and compare line by line, not just the bottom number. Our how to choose an installer guide has the full comparison sheet.

Watch specifically for quotes that bundle the BUS grant into a single "all-in" figure without showing the gross price and the £7,500 deduction separately. Installers registered for BUS are required to show this breakdown, if a quote doesn't, ask them to itemise it or treat that as a red flag.

What's typically excluded from a quote

Most quotes cover the heat pump, cylinder, standard pipework and commissioning, but a few things commonly sit outside the headline price unless you ask upfront: scaffolding for hard-to-reach outdoor unit positions, making good after wall penetrations (plastering, redecorating), garden reinstatement after any groundworks, and asbestos surveys on pre-2000 properties if the survey flags a risk. None of these are large individually, typically £100 to £600 each, but they can add up to a few hundred pounds if a quote didn't mention them. Ask your installer to confirm in writing what's included and what counts as an extra before you sign.

Should you wait for prices to fall?

The 2024 Heat Pump Investment Accelerator added UK manufacturing capacity for major brands. Prices have flattened in 2026 after several years of inflation, but there isn't a steep downward curve in sight. The £7,500 BUS grant currently lasts until 2028, and may not be extended. Waiting carries its own cost¹.

Financing options if you can't pay upfront

Even at £4,500 net, many households don't have that sum ready to go. A handful of routes exist: some installers offer 0% finance over 12 to 24 months built into the quote (check the APR carefully if it extends beyond that). Green home improvement loans are available from some high-street lenders and building societies at rates typically 1 to 3 percentage points below unsecured personal loans. In Scotland, the Home Energy Scotland interest-free loan of up to £7,500 stacks with the Scottish grant. None of these change the underlying maths, they just spread the £4,500 to £6,500 net cost most English and Welsh homeowners see after BUS.

How costs compare to other home improvements

For context, a heat pump's net cost after BUS sits in a similar range to a new kitchen or a loft conversion's early planning stages, not a trivial spend, but not in the same bracket as a full extension either. Unlike most home improvements, a heat pump also replaces an expense you were already paying (gas or oil heating), so part of the cost is offset by what you'd have spent on a boiler replacement anyway. If your existing boiler is nearing end of life, it's worth comparing the heat pump's net cost against a like-for-like boiler swap (typically £2,500 to £4,500) rather than against zero, since a boiler replacement is the realistic alternative for most homeowners weighing this decision.

Why quotes for the same property can still differ

Two installers surveying the same house can arrive at genuinely different, both legitimate, specifications. One might design for a lower flow temperature with more radiator upgrades, higher upfront cost, better long-term SCOP. Another might design for a higher flow temperature that avoids most radiator changes, lower upfront cost, slightly worse running-cost efficiency. Neither is wrong, they're different trade-offs between capital cost and running cost, and the right answer depends on how long you plan to stay in the property and how much the upfront saving matters to you. Ask each installer to explain the flow temperature they've designed for and why, it's the single number that explains most of the difference between two otherwise-similar quotes.

Costs for flats and smaller properties

A well-insulated flat or small terrace can sit below the headline ranges above, a smaller heat pump (4 to 6 kW) with a compact cylinder costs proportionally less than the 8 to 12 kW systems the worked example assumes. The bigger constraint for flats is usually siting the outdoor unit and getting freeholder consent, not the cost itself. If you're in a shared building, factor in the time to get permission alongside the installer's quote, that process can take longer than the survey and install combined.

Larger properties scale the other way, a 5 bedroom detached home with higher heat demand may need a 12 to 16 kW system, pushing the gross cost toward the top of the ASHP range or into GSHP territory if the garden allows it. The BUS grant stays fixed at £7,500 regardless of property size, so proportionally it covers a smaller share of a larger install's total cost, worth factoring in in when comparing your own likely costs against the ranges here.