Free Heat Pump Grant Calculator UK (2026)
Instantly see if you qualify for the £7,500 Boiler Upgrade Scheme grant. Calculate your installation costs, savings, and payback period.
Your Heat Pump Grant Results
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Heat Pump Installation Costs by Property Type (2026)
These figures are for Air Source Heat Pumps (ASHP) — the most common type installed under the BUS grant.
| Property Type | Est. HP Size | Installation Cost (ASHP) | Net Cost After £7,500 Grant |
|---|---|---|---|
| 2-Bed Flat / Apartment | 3.5–5.0 kW | £8,000 – £10,000 | £500 – £2,500 |
| 3-Bed Mid-Terrace | 4.5–6.0 kW | £9,000 – £12,000 | £1,500 – £4,500 |
| 3-Bed Semi-Detached | 5.5–7.5 kW | £10,000 – £14,000 | £2,500 – £6,500 |
| 4-Bed Detached | 7.5–10.0 kW | £11,000 – £16,000 | £3,500 – £8,500 |
| 5-Bed Large Detached | 10.0–14.0 kW | £12,000 – £18,000+ | £4,500 – £10,500+ |
Note: Ground Source Heat Pumps (GSHP) cost significantly more (£15,000–£35,000). Poor insulation increases required heat pump size. Prices are 2026 UK estimates — always get 3 quotes. Grant amounts and eligibility criteria are subject to government policy changes. Always verify on GOV.UK.
Find an MCS-Certified Heat Pump Installer
The BUS grant requires your installer to be MCS (Microgeneration Certification Scheme) certified. They apply for the grant on your behalf and deduct it from your quote.
| Platform | Best For | Why We Recommend |
|---|---|---|
| Checkatrade | Finding MCS-certified local installers | All tradespeople are vetted — reviews from real customers |
| Boiler Guide | Free quotes from multiple installers | Compare up to 3 quotes — free, no obligation |
| MCS Installer Search | Official certified installer directory | The official register — search by postcode |
How to Get Your £7,500 Heat Pump Grant: A 5-Step Guide
Step 1: Check Your Eligibility (Use Our Calculator)
The core BUS criteria are: property in England or Wales, existing fossil-fuel heating system (gas, oil, LPG, coal, or electric storage heaters), and a valid EPC. Our calculator gives you an instant indication — the EPC insulation requirement has been relaxed from 2026 to encourage more uptake.
Step 2: Understand Your Property's Needs
Our tool estimates the required heat pump size based on your floor area and insulation level. A correctly sized heat pump is critical — too small and it will struggle in cold weather, too large and it will short-cycle and lose efficiency. Use our Radiator BTU Calculator to check if your existing radiators are large enough for lower heat pump flow temperatures.
Step 3: Find an MCS Certified Installer
This is crucial — the installer applies for the BUS grant on your behalf. Find certified professionals via Checkatrade or get free quotes through Boiler Guide. Always verify their MCS certification before agreeing any work.
Step 4: Get Quotes & Agree on Work
Get at least 3 quotes from MCS-certified installers. The installer will confirm your eligibility, perform a heat loss survey, and present a final quote with the £7,500 BUS grant already deducted. You only pay the net amount.
Step 5: Installation & Grant Redemption
The installer completes the work and redeems the BUS voucher through Ofgem. You never handle the grant money directly — it goes straight to the installer. The entire process is straightforward once you have an MCS-certified professional on board.