How Much Does a Heat Pump Cost in 2026? Real UK Prices

An air source heat pump (ASHP) is the most common type installed in UK homes. The outdoor unit draws heat from the outside air — even in cold weather — and transfers it into your heating system.

Installed cost ranges for 2026:

• Small home (1–2 bed): £8,000–£10,000
• Mid-size home (3 bed semi): £10,000–£12,000
• Larger home (4 bed detached): £12,000–£15,000

These figures include the heat pump unit itself, the hot water cylinder, pipework, controls, and a typical installation. They do not include radiator upgrades or electrical upgrades, which are additional.

After the £7,500 BUS grant, the net cost for a 3-bed semi is typically £2,500–£4,500 — before any associated works.

A ground source heat pump (GSHP) extracts heat from the ground via buried pipework — either a horizontal trench system (requires a large garden) or a vertical borehole (drilled down 50–100m). GSHPs are more efficient than ASHPs but cost significantly more to install.

• Horizontal ground array: £15,000–£22,000 (needs garden of at least 200m²)
• Vertical borehole system: £20,000–£35,000 (borehole drilling adds significant cost)

After the £7,500 BUS grant, the net cost starts around £7,500–£27,500. GSHPs make most financial sense in properties with high heat demand, good garden space, and where the superior efficiency (COP 3.5–4.5 vs 2.5–3.5 for ASHP) meaningfully reduces running costs over time.

Several factors push the price up or down significantly:

• Insulation level. A poorly insulated home needs a larger (more expensive) heat pump. Getting your insulation right first — cavity wall fill (£500–£1,500), loft insulation (£300–£800) — can reduce the size of heat pump needed and improve its running efficiency.
• Radiator upgrades. Heat pumps run at lower flow temperatures (35–45°C) than gas boilers (65–75°C). If your radiators are small, they may need to be upgraded or supplemented. Budget £150–£400 per radiator for this work. A full house of radiator upgrades can add £2,000–£4,000.
• Hot water cylinder. Most ASHP installations require a hot water cylinder (typically 200–300 litres). If your home currently has a combi boiler with no cylinder, you'll need to find space and budget £600–£1,200 for the cylinder plus pipework.
• Electrical supply. A heat pump typically needs a 3-phase supply or a robust single-phase supply. Some older properties need a consumer unit upgrade (£500–£1,000) or even a supply upgrade from the DNO (can add £1,000–£3,000 in some cases).
• Property size and heat loss. The bigger and leakier the property, the larger and more expensive the heat pump required to serve it.
• Installer and location. Prices vary between installers and regions. Get at least three quotes from MCS-certified installers.

The ongoing running cost comparison at April 2026 energy prices, based on a typical 3-bed semi with a 10,000 kWh annual heat demand:

The running cost savings are much more compelling for homes off the mains gas network. If you're on oil or LPG, a heat pump typically pays back its net cost within 8–12 years on running costs alone.

Looking at total cost of ownership over 15 years for a 3-bed semi (including installation, running costs, and servicing, ignoring inflation):

The picture for mains gas is broadly cost-neutral over 15 years with the BUS grant. Without the grant, a heat pump is more expensive than a new gas boiler on cost alone — the case then rests on carbon reduction and the improving electricity price ratio over time. For oil and LPG homes, the economics already favour a heat pump clearly.