Before paying full price for insulation, a heat pump, solar panels or a home battery, it is worth spending a few minutes establishing whether somebody else is currently prepared to pay part of the cost, all of it, or lend you the money more cheaply than an ordinary finance agreement.
There is no single UK home-energy grant that everybody can claim. What’s available depends on where the property is, who owns and occupies it, household income, the home’s current energy performance and the measure being considered. A low-income household insulating an EPC E home in England is looking at a very different funding landscape from a Scottish homeowner buying a heat pump, a Welsh homeowner wanting solar and a battery, or a landlord improving several rented properties.
The landscape also changes quickly. ECO4 is approaching its final months, the Great British Insulation Scheme has closed, heat-pump grants changed during 2026 and a new government-supported home-improvement finance scheme is being rolled out through lenders.
So this is best read as a map of where to look, correct at the end of September 2026, rather than a permanent promise of what any particular household will receive.
Grant, subsidy or finance — know which one you’re being offered
These terms get blurred surprisingly easily in sales conversations.
A genuine grant is non-repayable money that pays all or part of the cost. A funded installation under a programme such as ECO4 or a local authority scheme can look similar from the householder’s point of view, although the money may pass directly between the scheme and installer rather than through the homeowner.
Low-cost or interest-free finance is different. It can make a major retrofit substantially more affordable, but the capital still has to be repaid and normal affordability or credit checks may apply. Ordinary installer finance is different again: a solar panel, battery or heat pump does not become government finance merely because the technology appears in government energy policy.
That distinction matters particularly in 2026 because the Warm Homes Loan Scheme is being introduced as a UK-wide, lender-led programme intended to reduce the cost of borrowing for energy-efficiency and low-carbon improvements in owner-occupied and privately rented homes. The Government is supporting participating lenders rather than offering one universal loan directly to households, and the scheme rules are designed to reduce borrowing rates — potentially very substantially — rather than promise that every resulting loan will be interest-free. Warm Homes Loan Scheme
As lender products emerge, the useful questions are straightforward: who is lending the money, what interest rate applies, what is the total amount repayable, and what part of the offer is actually government-supported?
Support that doesn’t fit neatly into one nation
Several important forms of help cut across national boundaries, although not always the same ones.
ECO4, the Energy Company Obligation, operates across England, Scotland and Wales and now runs until 31 December 2026. It is aimed principally at lower-income and vulnerable households in homes needing energy-efficiency improvements, with qualifying routes through certain benefits and through ECO4 Flex. Flex can also bring in households which do not receive the usual qualifying benefits but meet low-income, vulnerability or health-related criteria. Ofgem’s ECO guidance
ECO4 should not be thought of as a voucher guaranteeing free work. Energy suppliers have obligations to deliver qualifying improvements and an assessment determines what may be suitable, but meeting an eligibility route does not force a supplier or installer to offer a particular package at a particular property. Some households can receive fully funded work; others should not treat the words “ECO eligible” as a guarantee that an installer has secured funding.
The Great British Insulation Scheme is no longer an alternative route. It closed on 31 March 2026, despite still appearing in older search results and installer content. Ofgem’s Great British Insulation Scheme page
There is also support which is easy to overlook because it never arrives as a cheque. Qualifying professionally installed energy-saving materials currently receive temporary VAT relief across the UK, including insulation, solar panels, heat pumps and qualifying electrical storage batteries. Under the present rules the zero rate runs until 31 March 2027, after which the reduced rate is due to return unless the law changes again. HMRC’s current energy-saving materials VAT table
For solar owners in Great Britain, the Smart Export Guarantee is another form of support which should not be mistaken for an installation grant. It pays eligible small generators for electricity exported to the grid after the system has been installed; it does not pay for the solar panels upfront. Ofgem’s Smart Export Guarantee guidance
If you’re in England
For a lower-income household in an inefficient privately owned home, the Warm Homes: Local Grant is one of the first schemes worth checking. It is being delivered through local authorities from 2025 to 2028 and is aimed at owner-occupied and privately rented homes generally rated EPC D to G where the household meets the income or other eligibility routes.
The usual headline income threshold is £36,000 or less, although eligible postcodes, benefits and other routes can alter the answer. The improvements are decided through assessment rather than chosen from a shopping list and can include insulation, solar PV and low-carbon heating. The underlying scheme rules also allow PV battery storage where it forms part of an appropriate package, although what is actually offered will depend on the property and local delivery. Warm Homes: Local Grant
Owner-occupiers are not normally expected to contribute towards approved work. Private rented homes can qualify too, although the funding rules become different once a landlord is putting multiple properties through the scheme.
For heat pumps, the much broader route is the Boiler Upgrade Scheme. It is not means-tested. Current support is £7,500 towards eligible air-to-water and ground-source heat pumps, £2,500 towards eligible air-to-air systems and £5,000 for qualifying biomass boilers. Eligible off-gas-grid properties replacing oil or LPG with an air-to-water or ground-source heat pump can currently receive £9,000, with that uplift running until 31 March 2027. Ofgem’s Boiler Upgrade Scheme guidance
The installer deals with the BUS application rather than the homeowner submitting the grant application personally, and the air-to-air route is not confined simply to homes with storage heaters or other direct-electric heating.
For the average homeowner wanting solar panels or a battery, there is no equivalent universal £7,500-style solar grant. Targeted households may receive those technologies through Warm Homes: Local Grant, while broader access to cheaper borrowing is one of the purposes of the UK-wide Warm Homes Loan Scheme. That makes it particularly important to distinguish a genuine government-supported lender product from ordinary installer credit dressed up with government language.
If you’re in Scotland
Scotland has a much more established national funding route for owner-occupiers through the Home Energy Scotland Grant and Loan.
Eligible homeowners can receive up to £7,500 as a grant towards an air-, ground- or water-source heat pump or eligible heat-network connection, with up to a further £7,500 available as an optional interest-free loan. Energy-efficiency work such as insulation can receive grant support of up to 75% of eligible costs within a combined £7,500 grant ceiling, with further interest-free borrowing available within the scheme limits. Home Energy Scotland Grant and Loan
Qualifying rural and island homes receive an extra £1,500 on both the clean-heating and energy-efficiency grant limits, meaning a household receiving support in both categories can potentially reach £18,000 in grant funding across them.
The scheme is not means-tested, although the property must generally be an existing Scottish home used as the applicant’s main private residence, and finance remains subject to the scheme’s lending requirements.
Solar needs a more careful reading. Standard standalone solar PV and battery storage are not currently listed as ordinary Home Energy Scotland Grant and Loan measures for new homeowner applications. Solar thermal and hybrid solar PV/water-heating systems remain available on a loan-only basis. Home Energy Scotland funding terms
Lower-income households may instead qualify for Warmer Homes Scotland, while ECO4 remains available in Scotland until the end of December 2026.
If you’re in Wales
Wales has two notably different routes depending on whether the household needs targeted support or can afford to borrow.
The Warm Homes Nest scheme is aimed at qualifying lower-income and vulnerable households. Owner-occupiers and private tenants can potentially receive free improvements including insulation, heating upgrades, heat pumps and solar panels. Eligibility depends on household circumstances and the home’s energy performance rather than simply being a universal Welsh grant. Nest eligibility guidance
For homeowners able to repay borrowing, Green Homes Wales provides a much broader finance route. The Welsh Government-backed scheme offers interest-free loans from £1,000 to £25,000, generally over periods of up to ten years, alongside fully funded specialist retrofit advice. Eligible measures can include insulation, heat pumps, solar PV and battery storage. Green Homes Wales
There can also be grant support for certain measures within a Green Homes Wales finance package. That does not turn it into a standalone grant scheme: the Development Bank of Wales is explicit that the grant element cannot currently be accessed on its own without the associated finance package.
Wales also participates in BUS on the same current terms as England, while ECO4 remains available until 31 December 2026.
That gives Welsh homeowners three genuinely different questions to ask: do I qualify for fully funded Nest improvements, does BUS apply to the heating system I want, or is Green Homes Wales finance the more realistic route for a broader retrofit?
If you’re in Northern Ireland
Northern Ireland has to be researched separately rather than treated as an extension of the Great Britain schemes.
The Affordable Warmth Scheme remains a principal route for lower-income households in private-sector housing. Current guidance uses a gross annual household income threshold below £23,000, subject to the rest of the scheme’s eligibility rules. nidirect Affordable Warmth guidance
The Northern Ireland Sustainable Energy Programme, or NISEP, operates differently. Its 2026/27 programme is made up of individual schemes delivered by participating companies rather than one universal grant with a single eligibility test. The current programme runs until 31 March 2027, or until the budget for an individual scheme is exhausted. Utility Regulator NISEP schemes for 2026/27
A replacement for the Affordable Warmth approach is also coming, but it is not a live scheme yet. The Department for Communities says the Warm Healthy Homes Fund is expected to become its main fuel-poverty and private-sector energy-efficiency programme from April 2027. Warm Healthy Homes Fund
BUS, ECO4 and England’s Warm Homes: Local Grant do not extend to Northern Ireland, although the UK-wide Warm Homes Loan Scheme and current energy-saving-materials VAT rules need to be considered separately from those grant programmes.
Solar and batteries need a particularly careful funding check
There is no single universal UK solar-panel or home-battery grant in 2026.
A qualifying lower-income household in England may receive solar, and potentially battery storage, as part of a Warm Homes: Local Grant package. A qualifying household in Wales may receive solar through Nest, while Green Homes Wales gives other Welsh owner-occupiers an interest-free finance route that can include both solar and batteries. Scotland’s main homeowner scheme should not be assumed to fund an ordinary standalone PV-and-battery package simply because it funds heat pumps and insulation.
Across the UK, qualifying installations can benefit from the current temporary VAT treatment, while solar installations in Great Britain may subsequently earn export income through the Smart Export Guarantee. Those are useful forms of support, but neither should be described as a grant towards the purchase price.
This is why an advert for “government-funded solar” needs a scheme name attached to it. There are genuine routes to support, but the phrase on its own tells you almost nothing about whether the money is a grant, subsidised borrowing, tax relief, an export payment or simply ordinary commercial finance.
If you’re a landlord or a tenant
Tenure changes the funding picture substantially.
In England, Warm Homes: Local Grant can support qualifying private rented homes. Under the national scheme model, one eligible property can be fully funded for a private landlord, while second and subsequent properties generally require a 50% landlord contribution within the relevant cost caps. Tenants are not expected to make that contribution themselves. The exact work still depends on the household and property qualifying for the scheme.
Scotland has a separate Private Rented Sector Landlord Loan which is particularly relevant to landlords considering retrofit. Registered private landlords can currently borrow up to £38,500 per property for eligible energy-efficiency and renewable improvements. Landlords with five properties or fewer pay 0% interest; those with larger portfolios currently pay 3.5% APR. Solar PV and battery storage can be supported in specified packages alongside qualifying heating measures rather than simply as unrestricted standalone installations. Home Energy Scotland Private Rented Sector Landlord Loan
Green Homes Wales, by contrast, is currently an owner-occupier scheme and does not accept private landlord applications. Nest can support qualifying private tenants where the scheme and landlord requirements are met, while Northern Ireland’s targeted programmes have their own tenure rules.
The emerging Warm Homes Loan Scheme is also intended to support finance in both owner-occupied and privately rented homes, although the actual products, rates and eligibility depend on the participating lender.
For letting agents, that makes the role largely one of identifying possible routes for landlords and tenants rather than assuming the agent can make the application. Funding eligibility also sits separately from a landlord’s existing legal obligations: public money may help finance an improvement, but it does not remove repair or minimum-energy duties which already apply.
Before accepting any quote
Whatever scheme appears to fit, the most useful checks happen before the installation contract is signed.
Confirm the exact scheme name against its official source and check the household, property and proposed measure against the current criteria rather than an installer’s summary. Establish whether funding has actually been approved before deducting it from the project budget, and if finance is involved, look separately at the amount borrowed, interest rate, repayment period, fees and total amount repayable.
Timing also matters. Several schemes require assessment or a written funding offer before work begins. Paying a deposit or allowing an installer to start first can jeopardise support.
Do not assume different schemes can simply be stacked either. Qualifying for two programmes separately does not necessarily mean both are allowed to fund the same measure. BUS, ECO, devolved grants and finance packages all have interaction or double-funding rules of one kind or another. Green Homes Wales, for example, can be structured around a BUS-funded heat pump by financing or granting eligible remaining costs, while other schemes specifically prevent the same installation cost being funded twice.
And if somebody is selling a “government-funded” installation but cannot tell you the exact official scheme name, who provides the money and whether any of it has to be repaid, that is a reason to stop before signing rather than a reason to hurry.
A low-income household may be better served by a fully funded whole-home package than by borrowing for one technology. A homeowner outside the targeted schemes may still have BUS, VAT relief or lower-cost finance available. A landlord may have a completely different route from the tenant living in the same property.
The best time to establish which of those positions you are actually in is before the installer’s quote becomes the project plan.
Important: This article provides general property and funding information, not personalised financial, benefits or credit advice. Scheme values, eligibility criteria, available measures, budgets and closing dates can change, sometimes at short notice, and support differs across England, Scotland, Wales and Northern Ireland. The information above reflects the position at the end of September 2026. Confirm current eligibility and obtain formal approval from the relevant scheme before entering into contracts or starting work. Finance remains borrowing and should be assessed on its own terms.
