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What kind of property is it?
Oil boiler to air source heat pump
Typical annual saving: £600–£1,200. Estimated payback: 5–7 years (with grant). Off-gas-grid homes (oil, LPG, electric) typically see the fastest payback in the UK.
Methodology
- Sourced From 420+ Real Installer Quotes
- Updated Quarterly — Last Refresh Q1 2026
- Cross-Checked With Energy Saving Trust Data
- Methodology Public — See /methodology
- No Installer Kickbacks Influence Numbers
- Region-Adjusted (London, North, Scotland)
Estimates only. Actual cost depends on property condition, accessibility, region, and installer. ASHPCost.co.uk does not perform installations.
Methodology
- Sourced From 420+ Real Installer Quotes
- Updated Quarterly — Last Refresh Q1 2026
- Cross-Checked With Energy Saving Trust Data
- Methodology Public — See /methodology
- No Installer Kickbacks Influence Numbers
- Region-Adjusted (London, North, Scotland)
Estimates only. Actual cost depends on property condition, accessibility, region, and installer. ASHPCost.co.uk does not perform installations.
Switching from oil boiler: what changes
Switching from an oil boiler is the strongest financial case in the UK. Heating oil prices fluctuate dramatically (up to 100% in 12 months during 2022), and modern heat pumps run at ~3× the efficiency of an oil boiler. Annual savings of £600–£1,200 are typical, with payback in 5–7 years after the £7,500 BUS grant.
Off-gas-grid rural properties also gain energy security: no more ordering deliveries, no more running out in February, no more storage tank to maintain or replace.
Real UK cost data — Q1 2026
What heat pumps actually cost UK homeowners
Numbers below are derived from real installer quotes (n=420+) collected across England, Scotland and Wales between October 2025 and March 2026. Updated quarterly.
average installed cost before grant for a typical UK home
average net cost after the £7,500 BUS grant in England & Wales
median payback period vs. an oil boiler at current 2026 prices
average annual running-cost saving switching from oil heating
How it works
Three steps to a clear answer
No obligation, no pushy follow-ups, no fees from us — ever.
Tell us about your home
Property type, bedrooms, current heating fuel, postcode. We use these to estimate the right heat pump size (kW) and a realistic installed cost range based on quotes we've seen for similar UK properties.
See your cost band
We show: typical installed cost before grant, the BUS grant amount you may qualify for, your estimated annual running cost vs your current fuel, and a rough payback timeline.
Refine with real quotes
Estimate is a starting point — only a survey gives you a real number. We'll connect you with installers willing to provide free written quotes if you want hard pricing for your property.
Common questions
Air source heat pump FAQs
Installed costs typically run £8,000 to £14,000 before grant for a normal home. Detached or larger properties can reach £16,000. After the £7,500 BUS grant in England & Wales, most homeowners pay £500–£8,500. Scotland's Home Energy Scotland scheme offers up to £15,000 in combined grant + interest-free loan, often making the heat pump cheaper than a like-for-like boiler replacement.
Verify any installer's MCS certification at mcscertified.com.
Ready to take a look?
Get matched with MCS-certified installers in your area
The £7,500 BUS grant runs to 2028 — there's no rush, but waiting another year on an old gas, oil or LPG boiler costs you running-cost savings every month. A free survey tells you whether the fit is straightforward, with zero commitment.
Educational content — not a substitute for an MCS-certified survey.
Authoritative sources cited
- Energy Saving Trust UK heat pump trial ↗Multi-year EST field trial of UK heat pump performance and SCOP — used to validate our running-cost figures.
- Ofgem BUS installation statistics ↗Monthly vouchered installation count by region and property type — used to weight our regional pricing.
- ONS Domestic Energy Bills Survey ↗Office for National Statistics household energy expenditure survey — used as the baseline for running-cost comparisons.
- Octopus Cosy / EDF Heat Pump tariff sheets ↗Live heat-pump-specific time-of-use tariffs — used to model running cost when a heat-pump-friendly tariff is selected.
Statistics and figures on this site are derived from these sources unless otherwise stated. Errors? We correct promptly — see our corrections policy.
Continue your research
More UK heat pump resources
Sister sites we operate, each focused on a different decision step.