Energy Efficiency Grants UK – Free Home Improvement Funding Explained

Rising energy bills have pushed millions of UK households to look for ways to make their homes cheaper to heat. The good news is that the government, energy suppliers, and local councils between them fund a range of Energy Efficiency Grants UK schemes that can pay for insulation, heating upgrades, and even solar panels — in many cases at no cost to the homeowner at all. The less good news is that the landscape of Energy Efficiency Grants UK is genuinely confusing: scheme names change, funding windows open and close, and eligibility rules differ depending on where you live and who owns your home.

This guide breaks down the main Energy Efficiency Grants UK schemes available right now, who qualifies, what they cover, and how to apply — so you can work out which route, if any, applies to your situation.

Why These Grants Exist

Heating draughty, poorly insulated homes wastes an enormous amount of energy and money. A significant share of the UK’s carbon emissions comes from heating homes that leak warmth through uninsulated walls, lofts, and floors. The government has committed to improving the energy performance of millions of homes before 2030, partly to cut emissions and partly to reduce the number of households struggling with high energy bills.

Rather than relying solely on homeowners to fund upgrades themselves, several parallel schemes now exist: some funded directly by government, some by energy suppliers under a legal obligation, and some delivered through local councils using central government money. Understanding which bucket a scheme falls into helps explain why the rules differ so much from one to the next.

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The Main Schemes at a Glance

There are three broad categories of support currently available in Great Britain:

1. National government-backed grants — such as the Boiler Upgrade Scheme and the Warm Homes Plan, which set clear national rules.
2. Supplier-funded obligations — chiefly the Energy Company Obligation (ECO4), where large energy suppliers are legally required to fund improvements for qualifying households.
3. Local authority schemes — such as the Warm Homes: Local Grant, where councils distribute central government funding to households in their area, often with locally set priorities.

On top of these, the devolved nations run their own equivalents: Scotland has the Home Energy Scotland Grant and Loan, Wales has Nest and the Green Homes Wales loan scheme, and Northern Ireland has NISEP. If you live outside England, it’s worth checking your national scheme directly, as eligibility and funding levels can differ from the England-and-Wales schemes described here.

ECO4: The Energy Company Obligation

ECO4 has been the backbone of free insulation and heating support in England, Scotland, and Wales for several years. It works differently from a typical grant: rather than the government handing out money, large energy suppliers are legally obligated to fund energy efficiency improvements in a set number of homes each year. The cost is built into supplier obligations rather than paid from general taxation.

What it covers: ECO4 takes what’s often called a “whole house” approach. Instead of funding a single measure in isolation, an assessor looks at the property as a whole and can recommend a combination of loft insulation, cavity wall insulation, solid wall insulation, floor insulation, draught-proofing, and heating system upgrades, including first-time central heating for homes that don’t currently have it.

Who qualifies: ECO4 is aimed at low-income and vulnerable households. You’re likely to qualify if you or someone in your household receives means-tested benefits such as Universal Credit, Pension Credit, Income Support, income-based Jobseeker’s Allowance, or income-related Employment and Support Allowance, and your home has a poor Energy Performance Certificate (EPC) rating — typically D, E, F, or G. Some suppliers also participate in “LA Flex,” a local authority flexible eligibility route that allows councils to refer households who wouldn’t otherwise qualify under the standard benefits test but who are still clearly in need.

How to apply: You don’t apply to the government directly. Instead, you contact a participating energy supplier — you don’t need to be their customer to apply — or go through an accredited installer who will check your eligibility and survey your property. Because ECO4 is funded by suppliers rather than a fixed government pot, availability can vary depending on how close a supplier is to meeting its annual obligation.

Timing: <cite index=”2-1″>In the 2025 Autumn Budget, the UK Government announced that the ECO scheme would close in April 2026</cite>, though some sources note the scheme continuing to run through the rest of 2026 before a successor programme is expected to take its place. Given the scheme is winding down, anyone who thinks they might qualify should get an assessment sooner rather than later, since funding is allocated on a rolling basis and closes once a supplier’s obligation is met.

The Great British Insulation Scheme (GBIS)

Formerly known as ECO+, the Great British Insulation Scheme was designed specifically to fund insulation measures — cavity wall insulation, loft insulation, flat roof insulation, and room-in-roof insulation — for homes with poor energy efficiency ratings, including some households that wouldn’t otherwise qualify for ECO4 because their income is slightly too high.

Current status: GBIS closed to new applications on 31 March 2026. If you were partway through an application before that date, it’s worth checking with your installer or supplier about how existing cases are being honoured, but new applicants will now need to look at ECO4, LA Flex, or the Warm Homes: Local Grant instead, since these are the remaining live insulation routes.

The Warm Homes Plan and Warm Homes: Local Grant

The Warm Homes Plan is the government’s newer, larger umbrella initiative, reportedly backed by a substantial multi-year funding commitment running into the billions of pounds, aimed at upgrading the energy performance of homes across the country through to 2030. Within this umbrella sits the Warm Homes: Local Grant, which is delivered through local councils rather than energy suppliers.

What it covers: Similar to ECO4, this is a survey-led scheme, meaning the specific measures you’re offered depend on an assessment of your property. Typical measures include insulation, heat pumps, heating controls, and in some cases solar panels.

Who qualifies: Eligibility depends heavily on where you live and how much funding your local authority has been allocated, since councils decide how their portion of the budget is distributed. Households on low incomes are generally prioritised, but the exact criteria can vary by council. Because funding is allocated to local authorities rather than being a single national pot with fixed national rules, some areas will have far more generous or fast-moving schemes than others.

How to apply: Contact your local council directly, or check their website for details of their Warm Homes: Local Grant scheme. Some councils run their own application portals; others work through approved installer partners.

The Boiler Upgrade Scheme (BUS)

The Boiler Upgrade Scheme is arguably the single most valuable grant currently available for households wanting to move away from gas, oil, or LPG heating and install a heat pump. Unlike ECO4, it isn’t means-tested — there’s no income requirement — which makes it accessible to a much wider range of homeowners.

What it covers: <cite index=”8-1″>The scheme offers homeowners in England and Wales a grant of up to £7,500 to swap a fossil fuel boiler for a heat pump.</cite> Specifically, this breaks down as £7,500 towards an air source heat pump, £7,500 towards a ground source or water source heat pump, and a separate figure towards biomass boiler installations in eligible rural, off-gas-grid properties. There’s also a grant available for air-to-air heat pumps, at a lower amount, following recent updates to the scheme’s rules.

A significant temporary uplift has also been introduced for households currently heated by oil or LPG — typically rural, off-gas-grid properties. <cite index=”8-1″>From 21 July 2026 to 31 March 2027, eligible off-gas grid properties can get a £9,000 grant for air source or ground source heat pumps</cite>, recognising that these households are often most exposed to volatile fuel prices and stand to benefit most from switching.

Who qualifies: Your property needs to be in England or Wales (Scotland and Northern Ireland have separate schemes), currently heated by a fossil fuel system such as mains gas, oil, LPG, or older electric resistance heating, and the heat pump needs to fully replace — not simply supplement — your existing heating system. A useful recent change is that the previous requirement for a spotless EPC with no outstanding insulation recommendations has been relaxed, meaning a note about loft or cavity wall insulation on your EPC no longer automatically blocks your grant.

How to apply: You don’t apply directly. An MCS-certified installer applies to Ofgem on your behalf, and the grant is deducted straight from your quote before you pay — you never handle the money yourself. This also means it’s worth getting quotes from more than one certified installer, since the underlying cost of the heat pump and installation (before the grant is applied) can vary.

Funding and timing: The scheme has recently been extended, with government sources indicating it will run for several more years, giving households a reasonably long runway to plan a switch rather than feeling pressured into a rushed decision. That said, annual budgets are finite and allocated on a rolling basis, so if a heat pump is something you’re seriously considering, it’s sensible not to leave your application until the last minute.

A useful bonus: Heat pump installations currently benefit from a zero rate of VAT, further reducing the net cost on top of the grant itself.

Read more: Home Upgrade Grant (HUG) UK – Eligibility, Funding & How to Apply

Cold Weather and Winter Support

Separate from the insulation and heating grants above, there’s also direct financial support tied to cold weather. <cite index=”2-1″>Between 1 November 2025 and 31 March 2026, eligible households can get £25 for every seven-day period where the average temperature is below freezing</cite>, usually paid automatically if you already receive a qualifying benefit, without any need to apply separately. This isn’t a home improvement grant as such, but it’s worth being aware of alongside the schemes above, since it can meaningfully offset bills during the coldest weeks of winter.

Devolved Nation Schemes

Wales: Alongside UK-wide schemes, homeowners in Wales can access the Green Homes Wales loan scheme. <cite index=”2-1″>This offers an interest-free loan from £1,000 to £25,000 to fund energy efficiency home improvements, subject to affordability and credit checks</cite>, and in some cases grant funding may also be available alongside the loan. The Nest scheme is another Welsh-specific route worth checking for free or subsidised insulation and heating support.

Scotland: The Home Energy Scotland Grant and Loan scheme is the Scottish equivalent of several England-and-Wales schemes rolled into one, offering both grants and interest-free loans for insulation, heating, and renewables.

Northern Ireland: Support is more limited than elsewhere in the UK, with the Northern Ireland Sustainable Energy Programme (NISEP) being the main route, though there is currently no direct equivalent of the Boiler Upgrade Scheme.

What Measures Are Typically Funded

Across the various schemes, the following improvements come up again and again as the most commonly funded measures:

• Loft insulation — one of the cheapest and most cost-effective upgrades, since heat rises and escapes rapidly through an uninsulated roof.
• Cavity wall insulation — for homes built with a gap between inner and outer walls, this is a quick, minimally disruptive upgrade with a strong payback.
• Solid wall insulation — for older properties without a cavity, insulation is applied internally or externally; this is more disruptive and expensive, which is exactly why it’s a priority for grant funding.
• Floor and room-in-roof insulation — less commonly discussed but still funded under most whole-house assessments.
• Draught-proofing — a low-cost, high-impact measure often bundled in alongside larger works.
• Heating system upgrades, including first-time central heating for homes that have never had it, and heat pump installations under the Boiler Upgrade Scheme.
• Solar panels — increasingly included in survey-led schemes like the Warm Homes: Local Grant, where a property assessment determines whether solar is a suitable addition.

How to Check Your Eligibility Without Falling for Scams

Because so much of this funding is genuinely free to the end user, it has unfortunately attracted a wave of cold callers and door-knockers offering “free government boilers” or grants that don’t quite match how the real schemes work. A few sensible precautions:

• Never pay upfront for a survey or installation that should be free or grant-funded under a legitimate scheme.
• Check installer accreditation. Look for TrustMark registration for general retrofit work, and MCS certification specifically for heat pump and solar installations — this is a requirement for Boiler Upgrade Scheme funding.
• Go direct where possible. Rather than responding to a cold call, contact your energy supplier, local council, or check GOV.UK directly to confirm what you might be eligible for.
• Be wary of pressure tactics. Genuine schemes don’t require you to sign up on the spot; if you’re being rushed, that’s a red flag.

How to Get Started

1. Check your EPC rating. Most schemes prioritise homes with an EPC of D or below, so if you don’t already have a certificate, you can check whether one exists for your property on the official EPC register, or arrange a new assessment.
2. Work out which category you fall into. If you receive means-tested benefits, ECO4 or LA Flex is likely your first port of call. If you’re considering a heat pump and don’t need means-testing, the Boiler Upgrade Scheme is worth investigating regardless of income. If neither quite fits, your local council’s Warm Homes: Local Grant may still apply.
3. Contact your local authority. Even if you’re not sure which scheme applies, most councils can point you toward the right route, including any local flexible eligibility criteria that might apply to your circumstances.
4. Get an accredited assessment. Whichever route you take, a property survey by an accredited assessor or installer will confirm exactly what you can claim and how it will be delivered.
5. Compare quotes where relevant. For non-fully-funded work, such as top-up costs on a heat pump installation, get more than one quote from certified installers before committing.

A Word of Caution on Timing

Several of the schemes covered here are either winding down, being replaced, or subject to funding caps that mean support can run out before the official end date. ECO4 is being phased out, GBIS has already closed to new applicants, and even the more generously funded Boiler Upgrade Scheme allocates its annual budget on a first-come, first-served basis. Policy details, eligibility criteria, and funding levels are also genuinely subject to change at fairly short notice, so treat any guide — including this one — as a starting point rather than the final word. Before committing to work or relying on a particular grant, it’s worth confirming the current position directly with your energy supplier, local council, or on GOV.UK.

Read more: Home Insulation Grants for Pensioners: A Free Government Support Guide (2026)

Landlords and Tenants

Grant eligibility isn’t limited to owner-occupiers. Landlords can apply for funded improvements on rental properties, and in many cases the first property under a landlord’s portfolio is fully funded, with subsequent properties potentially only partially funded depending on the specific scheme and local authority rules. This matters increasingly as Minimum Energy Efficiency Standards (MEES) tighten, pushing landlords to bring rental properties up to at least an EPC rating of E, with further tightening expected. Rather than treating compliance purely as a cost, landlords who check their eligibility for ECO4, LA Flex, or the Warm Homes: Local Grant may be able to fund a significant share of the required upgrades.

Tenants themselves can also usually apply on their landlord’s behalf, or at least flag the possibility of funded works, though written landlord consent is generally required before any physical work can start on a rented property. If you’re a tenant living in a cold, poorly insulated home, it’s worth raising the possibility of a funded upgrade with your landlord directly, since the cost to them may be far lower than they assume.

What These Grants Don’t Cover

It’s worth being realistic about the limits of this funding. Even the most generous schemes rarely cover 100% of every possible cost:

• The Boiler Upgrade Scheme grant covers the heat pump unit and core installation labour, but it typically doesn’t cover additional works that a survey might recommend, such as upgrading radiators to work efficiently with lower flow temperatures, fitting a new hot water cylinder, or completing insulation improvements that were flagged as necessary. These add-on costs can vary significantly depending on the age and condition of your home.
• Whole-house ECO4 assessments are thorough, but not every household that applies will be offered every possible measure — the specific package depends on what the assessor identifies as necessary and cost-effective for that property.
• Solar panels are only included in some local authority schemes and are usually offered only where a property survey confirms they’re a suitable and cost-effective addition, rather than being available on request.

Because of this, it’s sensible to budget for the possibility of some out-of-pocket cost even where a scheme is described as “free,” particularly for older or harder-to-treat properties.

Read more: Loft Insulation Grants: How to Get Free Loft Insulation in the UK

The Bottom Line

There is real, substantial funding available in the UK right now for households wanting to cut their energy bills through insulation, heating upgrades, and renewables — and for many households, particularly those on low incomes or living in poorly insulated homes, a meaningful share of the cost can be covered without any repayment required. The challenge isn’t a lack of support; it’s navigating which of several overlapping schemes applies to your specific situation. Starting with an EPC check and a conversation with either your energy supplier or your local council is the quickest way to cut through the noise and find out exactly what you’re entitled to.