The gap between “I want a heat pump” and “an installer will fund one” is wider than most people think. Quotes get pulled. Surveys fail at the door. Applications stall on missing paperwork. This 12-point self-check tells you whether you are a yes, a maybe, or a no before you spend hours on the phone. Work through it once. You will know exactly which route to chase and which prep work to do first.
The 4 UK heat pump funding routes in 2026
There are four schemes worth knowing about. Each has a different gate.
ECO4 is the big one for benefit-eligible households. It runs through energy suppliers and covers heat pumps as part of a whole-home retrofit package. LA Flex routes widen eligibility through local authority discretion, so households just above the benefits line can still qualify.
GBIS (Great British Insulation Scheme) does not fund heat pumps directly. It funds insulation. That matters because heat pumps only work properly in a well-insulated home, so GBIS is often the prep step that makes a heat pump viable later.
Boiler Upgrade Scheme (BUS) is the flat-rate grant most people have heard of. It pays £7,500 toward an air source heat pump and is open to owner-occupiers and private landlords in England and Wales. No means test. Application is done through your MCS-accredited installer.
The Warm Homes Plan is the new DESNZ framework published 21 January 2026. It is the successor envelope that will gradually fold ECO4 and BUS into a single national programme. Early days. For now, ECO4 and BUS are still the active routes.
The 12-point self-assessment
Tick yes or no on each. Keep a running count.
1. Property type. Owner-occupier is the easiest path. Private rentals need landlord consent in writing before any installer will quote. Social housing tenants go through their landlord, not direct.
2. Property age and construction. A Victorian solid-wall terrace is harder to make heat-pump-ready than a 1980s cavity-wall semi. Not impossible. Just more retrofit work before the heat pump pays back. If your walls are solid brick or stone, expect insulation cost on top.
3. EPC rating. ECO4 generally targets properties rated D to G. BUS does not have a strict EPC gate but installers will not certify a property with no loft insulation. If you have not had an EPC done in the last ten years, get one. It is the first thing any scheme asks for.
4. Loft and cavity insulation already in place. A heat pump pushes warm water through your radiators at a lower temperature than a gas boiler. That only feels warm if the heat stays in. Loft insulation at 270mm and cavity wall fill (where applicable) are the floor.
5. Existing heating type. Off-gas-grid homes (oil, LPG, electric storage) often qualify for higher grant uplifts because the carbon and bill saving is larger. On-mains-gas properties still qualify for BUS but with less generous secondary support.
6. Hot water cylinder space. Most heat pumps need a hot water cylinder, typically 180 to 250 litres. If you have a combi boiler and a tight airing cupboard, you will need to find room. Loft, garage, or under-stairs are common.
7. Garden or outdoor unit space. An air source heat pump needs around one square metre of ground or wall space outside with clear airflow on three sides. Not against a fence. Not in an enclosed alcove. If you have a small London terrace with a paved yard, check now.
8. Electrical supply capacity. Some older properties have a single-phase 60A or 80A supply that is already close to its ceiling. A heat pump usually needs around 3kW continuous draw. A meter or supply upgrade through your DNO adds time and sometimes cost. Worth asking your electrician.
9. Radiator size. Lower flow temperatures mean radiators have to be larger to deliver the same heat output. Many installs need one or two rooms uprated. A proper MCS-accredited heat loss survey will flag this. Budget for it.
10. Benefits and income status. ECO4 gates on receipt of qualifying benefits (Universal Credit, Pension Credit, ESA, JSA, Child Benefit with income cap, plus others). LA Flex widens this. Check your local authority’s ECO4 Flex statement of intent. If you receive a qualifying benefit, your route is clear.
11. Council Tax band. GBIS General Group targets households in bands A to D in England, A to E in Scotland and Wales. Not heat pumps directly, but if your band is in range you can sequence: GBIS for insulation first, BUS for the heat pump second.
12. Timeline urgency. Boiler broken right now? Heat pump grants do not move at boiler-replacement speed. Survey to install can be six to sixteen weeks. If you need heat this week, repair or replace the boiler and revisit the heat pump route once you are warm. Do not let urgency lock you into the wrong system.
Quick scoring rubric
Count your yeses.
- 10 or more yeses. ECO4 plus BUS combo, or BUS solo if you are not benefit-eligible. You are in good shape. Get three MCS-accredited installer quotes and run the application through whichever you appoint.
- 6 to 9 yeses. BUS solo or GBIS-then-BUS sequenced. You may need insulation prep first. Use the eligibility checker at greenhomegrants.co.uk to map the order.
- Under 6 yeses. Retrofit prep first. Loft, cavity, draught-proofing, possibly windows. Re-assess in twelve months. The full grant directory at ecosavinghub.co.uk lists insulation routes available in your region.
If you are unsure about ECO4 specifically, the companion guide at greenlivingexperts.co.uk/do-i-qualify-for-eco4 walks through the benefit-eligibility detail.
What to do after the self-assessment
Three steps, in order.
- Find an MCS-accredited heat pump installer near you. MCS is the Microgeneration Certification Scheme. No MCS certificate, no grant payment. The official register is at mcscertified.com.
- Cross-check the installer is also TrustMark registered (trustmark.org.uk). Belt and braces.
- Get the installer to run the BUS or ECO4 application on your behalf. They do this routinely. You do not apply yourself.
Landlords and small businesses running multi-property portfolios should look at commercial-grade heat pump procurement, which covers the procurement side for non-domestic and bulk-installation contexts.
FAQ
What is BUS? The Boiler Upgrade Scheme. A flat £7,500 grant from the UK government toward an air source heat pump install. Run through your installer. England and Wales only.
Can I have BUS and ECO4 together? Yes, on the right property profile. ECO4 covers the wider retrofit, BUS tops up the heat pump cost. Your installer will structure the application.
What is MCS? The Microgeneration Certification Scheme. The accreditation body for renewable installs. Required for any grant-funded heat pump.
How long does an install take? Six to sixteen weeks from first survey to commissioning, depending on radiator and cylinder work needed. Plan ahead.
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