What Home Energy Scotland is
Home Energy Scotland is the Scottish Government funded service that helps households make their homes warmer and cheaper to run. For windows specifically, the help now comes as an interest-free loan rather than as free money. That distinction matters, so it is worth stating plainly: you borrow the funds and pay them back, but you pay no interest on the balance. The non-repayable grant that some homeowners remember reading about is no longer available for windows specifically, though it does remain for other measures such as insulation and clean heating. If you live in Scotland and want to replace tired single glazing, this loan is the standing route to do it without the cost of borrowing on top.
The interest-free loan for windows
The headline figure is an interest-free loan of up to £8,000 towards upgrading single glazing to double or triple glazing. Because there is no interest, you only ever repay what you borrow, which makes it far cheaper than a typical home-improvement loan or putting the work on a credit card. It is best thought of as a way to spread the cost of a job you were going to do anyway, not as a discount on the windows themselves. If you are weighing up whether to step up from double to triple, our guide on double versus triple glazing sets out where the extra pane earns its place and where it does not, which is useful before you fix the amount you want to borrow.
One honest point to keep in mind: the cap is up to £8,000, so on a larger whole-house project the loan may not stretch to the full bill. In Glasgow, for example, our modelled figures put a typical three-bed at £3,680 to £9,200 fitted in uPVC, so the cap covers most of that range but not the top of it; our double glazing cost in Glasgow page works the figure through by house type. Price the work first so you know what the loan covers and what you would fund yourself. Our uPVC window calculator gives you a realistic figure to plan around before you commit to a loan amount.
The rural uplift does not apply to glazing
Home Energy Scotland says "An uplift of £1,500 is available for rural and island homes to both the heating and energy efficiency grants". Its terms put the combined grant at up to £7,500, or £9,000 where the household qualifies for the rural uplift. That uplift is to the grants. Glazing sits in the loan-only table at £8,000, and we found no source for a higher glazing loan in rural areas, so plan on £8,000 wherever you live. The loan is also only for replacing single glazing, not for replacing existing double, triple or secondary glazing.
Treat this as cheap money for a job you were doing anyway, not as a reason to over-spec. Get a couple of honest quotes for the glazing first, then borrow only what the work actually needs. Interest-free is brilliant, but it is still a loan you have to pay back, so do not let the £8,000 ceiling tempt you into windows you do not need.
Double Glazing Cost Calculator Team
Who can apply
This loan is for owner-occupiers only. You must own and live in the home to use it, which rules out landlords and property developers. If you let out the property, the relevant route is the separate Private Rented Sector Landlord Loan, which offers up to £38,500 in total, with £4,500 towards single-glazing upgrades. For owner-occupiers, the practical test is simply whether you have single glazing worth upgrading and a home where an adviser agrees new windows would help. If you are not sure which schemes across the UK you might qualify for, our grant eligibility checker is one of the decision tools on this site that walks you through the main conditions in a couple of minutes, and the material and quote checks in our decision tools cover the rest of the buying decision.
It is also worth being clear that this is the Scottish route. England uses ECO4, which runs to 31 December 2026, and the Warm Homes: Local Grant instead, while Wales runs the Welsh Government Warm Homes programme, all of which work on different rules and figures. If you live south of the border, those are the pages to read rather than this one.
How to apply
Applying is straightforward and free, and you should always go through the official Home Energy Scotland route rather than paying a third party to do it for you.
- Use the self-assessment tool. Start with the Home Energy Scotland self-assessment tool to see whether you are likely to be eligible for support towards new glazing.
- Speak to an adviser. If you look eligible, an adviser will talk through your home and the help available, including the interest-free loan for windows.
- Get your home assessed. The adviser assesses the home and recommends the measures that will make the most difference, which may include upgrading your single glazing.
- Confirm your loan amount. Confirm what you can borrow, up to £8,000 for glazing.
- Arrange the work and claim. Book the glazing with an installer, then claim the interest-free loan towards the cost in line with the assessment.
Whether or not the loan covers your whole job, the same buying rules apply: get more than one quote, check the figures and do not be rushed. If the loan leaves a balance for you to fund, our wider grants hub shows what other help exists across the UK and where most homeowners simply pay privately for a fair price.
Frequently asked questions
For windows it is an interest-free loan, not a non-repayable grant. You borrow up to £8,000 towards upgrading single glazing to double or triple glazing and repay it over time at zero interest. The non-repayable grant is no longer available for windows specifically, although it remains for measures such as insulation and clean heating.
Up to £8,000 as an interest-free loan towards upgrading single glazing to double or triple glazing. Glazing is loan only, and only for replacing single glazing. Home Energy Scotland's £1,500 uplift for rural and island homes applies to its heating and energy efficiency grants, not to the glazing loan, so the glazing cap stays at £8,000 wherever you live.
No. The interest-free loan is for owner-occupiers only, so you must own and live in the home. Landlords and developers cannot use this scheme. A separate Private Rented Sector Landlord Loan offers up to £38,500, with £4,500 towards single-glazing upgrades.
Start with the Home Energy Scotland self-assessment tool. If you look eligible, an adviser assesses your home and recommends the measures that will help most. You then arrange the work and claim the interest-free loan towards the glazing once the assessment supports it.
This loan is the Scottish route only. In England the schemes to look at are ECO4, which runs to 31 December 2026, and the Warm Homes: Local Grant. Our England grants pages set out who qualifies for each and how the funding works.
Not always. The interest-free loan for glazing is capped at £8,000, so on a larger whole-house job you may need to fund the balance yourself. It is sensible to price the work first so you know what the loan does and does not cover.