Heat Pumps Required in All New Homes: What This Means for Existing Homeowners and the £7,500 BUS Grant

From the latest update to the Future Homes Standard, all new homes built in England from 2025 must include low-carbon heating, which in practice means heat pumps. This policy shift will massively increase demand for MCS certified installers over the next few years. If you're an existing homeowner considering a heat pump, the window to claim your £7,500 BUS grant and book a good installer without a long wait is narrowing fast.

What exactly has changed with the new-build heat pump rule?

The Future Homes Standard, confirmed by the government in late 2024, sets new energy efficiency requirements for homes built in England. The headline change is simple: gas boilers are effectively banned in new-build properties. Developers must install low-carbon heating systems, and for the vast majority of new homes, that means an air source heat pump.

This isn't a suggestion or a target. It's a legal requirement under updated Building Regulations. Housebuilders who want to get sign-off on new developments will need to comply.

The policy has been years in the making. The original consultation launched back in 2019, with a draft standard published in 2023. But now it's real, and the construction industry is already adjusting. Barratt Redrow, the UK's largest housebuilder, has been trialling heat pumps in new developments since 2022.

Why does a new-build rule matter to existing homeowners?

You might be thinking: I already own my home, so why should I care what goes into new-builds? Fair question. The answer is installer capacity.

Right now, there are roughly 3,000 MCS certified heat pump installers across the UK. That number is growing, but slowly. The government's own target is 600,000 heat pump installations per year by 2028. In 2023, around 55,000 were installed. That's a massive gap.

New-build developers will be competing for the same pool of qualified installers that you'll need for a retrofit. Large housebuilders tend to sign long-term contracts with installation firms, effectively locking up capacity. That means fewer slots available for private homeowners wanting a single installation.

If you've been putting off getting quotes, the maths is pretty clear. Every month you wait, the queue gets longer.

How the £7,500 BUS Grant works for existing homeowners

The Boiler Upgrade Scheme (BUS) gives homeowners in England and Wales a £7,500 grant towards the cost of an air source heat pump, or £7,500 for a ground source heat pump. The grant was increased from £5,000 in October 2023, and the scheme is currently funded until March 2028.

Here's what you need to know about eligibility:

• Your property must have an existing heating system (it's for replacements, not new-builds).
• You need a valid EPC with no outstanding loft or cavity wall insulation recommendations, unless those measures aren't appropriate for your home.
• The installation must be done by an MCS certified installer. No exceptions.
• The installer applies for the grant on your behalf, so it's deducted from your quote rather than claimed back later.

The grant doesn't cover the entire cost. A typical air source heat pump installation for a three-bedroom semi-detached house runs between £10,000 and £14,000 before the grant. After the £7,500, you're looking at roughly £2,500 to £6,500 out of pocket. That's comparable to a new gas boiler installation from a decent firm.

Let's put a real scenario on this. Sarah and Tom in Nottingham have a 1990s three-bed semi with decent cavity wall insulation and a 15-year-old gas boiler. They got three quotes in early 2025, ranging from £11,200 to £13,800 for an 8.5kW air source heat pump system. After the BUS grant, their cheapest option came in at £3,700. Their gas bill was running at about £1,400 a year, and they're projected to spend around £900 a year on electricity for the heat pump on the current tariff. That's a payback period of roughly seven to eight years on the out-of-pocket cost alone.

Could the BUS grant be scrapped? The political risk you should know about

Here's something that doesn't get discussed enough. The £7,500 grant isn't guaranteed to last until 2028.

Reform UK has explicitly stated it would scrap the Boiler Upgrade Scheme and reverse the gas boiler phase-out if it gained power. While they're not in government, their growing influence could shift policy. Even within the current government, Treasury pressure to cut spending means the BUS is always vulnerable at budget time.

The scheme has also been underspent in previous years, which sounds like good news but actually gives politicians an excuse to reduce the pot. The logic goes: if people aren't using it, why fund it?

Frankly, counting on any government grant being available in two or three years is risky. If you're seriously considering a heat pump, treating the current £7,500 as something that could disappear is the sensible approach.

"Heat pumps don't work in older UK homes" and other common concerns

This is the biggest objection I see, and it deserves a straight answer. Can a heat pump heat a draughty Victorian terrace? Honestly, it depends on the specific house and how much prep work you're willing to do.

A heat pump works best in a well-insulated property. That's true. But "well-insulated" doesn't mean passive house standards. It means sensible improvements like loft insulation to current regulations (270mm mineral wool), draught-proofing windows and doors, and cavity wall insulation where possible.

Many homes built after 1980 are already insulated well enough for a heat pump to work efficiently without major upgrades. For older solid-wall properties, you might need internal or external wall insulation, which adds cost and disruption. But that's a conversation to have with a qualified installer who surveys your actual home, not something to dismiss based on a headline.

The Electrification of Heat Demonstration Project, run by the government's former energy department (BEIS), monitored over 740 heat pump installations in real UK homes between 2020 and 2022. Properties ranged from 1900s terraces to modern detached houses. The average seasonal performance factor (SPF) across all homes was 2.8, meaning for every unit of electricity consumed, the heat pump produced 2.8 units of heat. That's not laboratory conditions. That's real homes, real winters, real families.

Radiator size is another common worry. Heat pumps run at lower flow temperatures than gas boilers, so some radiators may need upsizing. A good installer will do a room-by-room heat loss calculation and tell you exactly which radiators need replacing. In most homes, it's only a few. Not the whole house.

What should existing homeowners do right now?

If you're thinking about a heat pump, here's a practical step-by-step.

First, check your EPC. If you don't have one or it's expired, get a new assessment. This costs around £60 to £120 and tells you what insulation improvements you need before qualifying for BUS.

Second, get your loft and cavity wall insulation sorted if they're flagged on the EPC. These are relatively cheap upgrades, often available through ECO4 funding if you're on a lower income.

Third, get at least three quotes from MCS certified installers in your area. Prices vary significantly between firms, and you want someone who'll actually survey your home rather than quoting over the phone. A proper survey should include heat loss calculations and a recommendation on radiator changes.

Don't wait for a "better time." With new-build requirements pulling installers towards developer contracts, and political uncertainty around the BUS grant, the best time to act is before the squeeze hits.

Frequently asked questions

Do all new homes have to have heat pumps now?

Yes. Under the Future Homes Standard, all new homes in England must be built with low-carbon heating from 2025 onwards. In practice, this means air source or ground source heat pumps for the vast majority of new-build properties. Gas boilers will no longer meet Building Regulations for new construction.

Can I still get a £7,500 grant for a heat pump in 2025?

Yes. The Boiler Upgrade Scheme is currently funded until March 2028, offering £7,500 towards air source or ground source heat pump installations in England and Wales. You must use an MCS certified installer, and the property must have an existing heating system. The installer applies for the grant on your behalf.

Will heat pump installers be harder to book because of new-build demand?

Very likely. There are around 3,000 MCS certified heat pump installers in the UK. New-build developers will increasingly contract these firms for large housing developments, reducing availability for private homeowners. Wait times for retrofit installations are expected to increase over the next two to three years.

Is Reform UK going to scrap the heat pump grant?

Reform UK has publicly stated it would abolish the Boiler Upgrade Scheme and reverse the gas boiler phase-out. They are not currently in government, but their growing political influence means the policy could come under pressure. The safest approach is to apply for the grant while it's still available.

Are heat pumps worth it in an older UK house?

For many older homes, yes. Government-monitored trials in over 740 real UK properties showed an average efficiency of 2.8 times the electricity input, across a wide range of house ages and types. Some older homes will need insulation upgrades and a few larger radiators, but a qualified MCS installer can assess exactly what your property needs during a home survey.

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Ready to find out what a heat pump would cost for your home? Use our directory at heatpumpinstallerdirectory.co.uk to find MCS certified installers in your area, compare quotes, and get your BUS grant application moving before demand makes waiting lists even longer.