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Why get double glazing?

  • Save up to £195 per year on energy bills
  • Improve your property's value
  • Reduce outside noise

A Guide to Double Glazing Grants in 2024

ECO4 scheme provides funding to energy-poor households on benefits

The Home Upgrade Grant is available to low-income, off-grid households

The Home Energy Scotland Loan is available to most Scottish residents

Double glazing costs upwards of £10,000 for the average home – no small fee, but it’s a long term investment that you’ll reap the benefits of every day for the next 30 years or more.

Replacing  your draughty old windows – with the associated cold, mould and condensation problems – for high-quality double-glazed windows will dramatically increase the comfort and cosiness levels in your home, while reducing your energy bills at the same time.

Plus, when it comes to selling your home, double glazing will make it more attractive to buyers through improved security and a higher EPC rating, adding value and desirability to your property.

Despite all of these benefits, many homeowners struggle to cover the upfront costs of double glazing, which is why we recommend checking if you’re eligible for government grants.

In this article, we’ll guide you through the different grant options further down the page, but here’s a quick overview of what’s available:


What it's worth?

Who's eligible?


Up to 100% of the costs

People who meet certain benefits criteria

Home Upgrade Grant

Up to 87% of the costs

Low-income, off-gas grid homes with EPC rating of D, E, F, or G

Home Energy Scotland

Interest-free loan for 100% of the costs

Residents in Scotland

If you don’t qualify for double glazing grants, you can still compare prices and get quotes with our easy-to-use form.

What type of double glazing do you need?

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What government grants are available for double glazing?

There isn’t a grant specifically for double glazing, but the following three grants for energy efficient home improvements can be used to get double glazing installed:

  • ECO4: provides funding for energy efficient retrofits to fuel-poor households, or ones with occupants on certain benefits
  • The Home Upgrade Grant: provides funding for energy saving improvements to low-income households not connected to the gas grid
  • The Home Energy Scotland Grant and Loan: provides interest-free loans for double glazing to residents in Scotland

If you live in an older property, we’ve answered whether you can install double glazing on a listed building.

Energy Company Obligation (ECO4)

ECO4 is the fourth version of the government’s Energy Company Obligation (ECO) scheme, and ends in March 2026.

The scheme obliges a list of select energy providers to pay for energy efficient home improvements for low-income and energy-poor households.

Improvements that the Ofgem-administered scheme covers include cavity wall insulation, boiler replacements, heat pump installation, and double glazing (replacing single glazing with double glazing, or replacing old double glazing).

There’s no set amount to how much funding you can receive with ECO4, since it’s dependent on what your chosen energy supplier decides your home needs.

ECO4 eligibility requirements for solar panels

You might be eligible to get double glazing with ECO4 if:

  • Your home has a low EPC rating (D to G)
  • AND someone in your household receives certain benefits (full list on Ofgem website)

You don’t need to own your home to receive funding from ECO4, it’s open to both private tenants (with their landlord’s permission), and those in social housing.

Potential savings with ECO4

ECO4 could potentially cover 100% of the cost of double glazing, saving you £11,005, the average cost of installing double glazing in a three-bedroom house.

How to apply for ECO4

To apply for ECO4, contact one of the energy providers participating in the scheme.

This doesn’t need to be your current supplier, and Ofgem actually recommends that you contact multiple suppliers to find the best deal.

Energy suppliers that can carry out improvements under ECO4

Here’s a list of the energy suppliers that are part of ECO4 and how to contact them:

Double glazing grants via ECO Flex

ECO Flex is a mechanism in the ECO4 scheme that allows local authorities, the Scottish and Welsh governments, and energy suppliers to refer households for energy improvements funding even if they don’t meet the benefits criteria of ECO4.

It was designed to open up grants to more low-income households, as many of them don’t meet the threshold to receive benefits.

ECO Flex eligibility requirements for double glazing

To be eligible for ECO Flex through a referral from your local authority or devolved nation, you must live in an energy inefficient home AND:

  • Have a household gross annual income of £31,000
  • OR a person in your household has a health condition that makes them vulnerable to the cold (a cardiovascular condition, a respiratory disease, limited mobility, or immunosuppression)

To get referred to ECO Flex by your energy supplier, you must:

  • Be on a non-Pre-Payment meter and have been in fuel debt for over 13 weeks
  • OR be on a Pre-Payment meter and have self-disconnected, OR have received supplier discretionary/friendly credit within the last 13 week, OR be in a debt repayment plan with their energy supplier, OR be repaying your fuel debt through 3rd party deductions

To find out if you’re eligible for ECO Flex, contact your local authority or devolved nation. You can usually find contact details on their website.

Energy suppliers will usually take it upon themselves to refer you, but you can still get in touch with them if you think you qualify for ECO Flex and they haven’t yet made a referral.

What type of double glazing do you need?

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Home Upgrade Grant

The Home Upgrade Grant offers households between £3,000 and £24,000 for home improvements that increase a property’s energy efficiency. Up to 40% of the total amount granted can be spent on double glazing.

The Home Upgrade Grant is only available in 45 local authorities in England, and will run until March 2025.

It’s open to low-income households that are off the gas grid, including homeowners, renters, and those living in social housing.

Home Upgrade Grant eligibility requirements

You might be eligible for the Home Upgrade Scheme if:

  • Your household income is less than £31,000 a year
  • AND you’re off the gas grid
  • AND your home has an EPC rating of D, E, F, or G
  • AND you live in one of the 45 local authorities that applied for the grant

Potential savings with the Home Upgrade Grant

The Home Upgrade Grant could cover up to 87% of the cost of double glazing.

Double glazing costs the average three-bedroom house £11,050, and 40% of the up to £24,000 grant can be spent on windows. This means you’d be saving £9,600 on double glazing.

How to apply for the Home Upgrade Grant

You can find the list of local authorities participating in the grant, and their contact information, on the government’s website.

Get in touch with them. They’ll be able to tell you what the next steps are.

Alternatively, you can use the government’s eligibility checker and application tool to make sure you qualify.

Section of a corner of a double-glazed window, showing the gap between each pane

Home Energy Scotland Grant and Loan

Home Energy Scotland is a scheme funded by the Scottish Government that will help you replace single glazing with double glazing, among other energy saving home improvements.

Grant funding isn’t available for double glazing, but you can get an interest free loan to replace single glazed windows with double glazed ones.

The loan cannot be used to replace old double glazing.

Home Energy Scotland eligibility requirements

You might be eligible for the Home Energy Scotland loan if you meet one of the following requirements:

  • You’re a homeowner living in Scotland
  • You’re building your own home
  • You’re not a landlord
  • You’re not a property developer

How to apply for the Home Energy Scotland

Home Energy Scotland is advising applicants to complete a Home Energy Check before reaching out to them.

Once you’ve done that, you can phone 0808 808 2282 or use Home Energy Scotland’s email contact form. Someone will run through the best options for your home with you.

You can find a full guide of the application process on the Home Energy Scotland website.

I don’t qualify for any double glazing grants – now what?

If you don’t qualify for any double glazing grants, there are other ways to reduce costs. Here are just a few:

  • Get at least three quotes from different double glazing installers and negotiate to find the best deal
  • Go for the least expensive materials and designs, such as uPVC casement windows
  • Choose fixed panes, which are cheaper than windows you can open, for entrance halls, corridors, and other rooms that don’t need an open window
  • Opt for double glazed windows with a lower energy rating – B or A – as they’re cheaper than A+++ windows and still more insulating than single glazing
  • Have your windows installed in winter, especially right before Christmas, when demand is low and prices go down. Some installers also have sales in January

Hopefully these tips can help you reduce costs. Just remember to be wary of overly cheap double glazing. Price can be a reflection of quality, and as with most things in life, if something is too good to be true, it probably is.

Double glazing financing

Most of the biggest window companies in the UK offer financing for double glazing.

Everest offers one of the best financing options, with customers able to pay for their windows over 180 months, essentially 15 years, at a 12.9% fixed interest rate.

Clearview lets you pay over 96 months at a 18.9% fixed rate, and Britelite over 63 months at a 12.9% fixed rate.

You can find out more about these companies and their finance options by going to our guide on the best double glazing companies.

How much can you save with double glazing grants?

You could save on 100% of the cost of buying and installing double glazing with the ECO4 grant, and the Home Upgrade Grant could save you 87%.

The Scottish Home Energy Loan could save you hundreds of pounds, since it’s an interest free-loan, making paying in instalments much cheaper than if you’d gone with an installer’s financing option.

If you want to get started on making your home more efficient, take a look at our 7 easy ways to improve your property’s EPC rating, and our guide to government grants for insulation that can help fund your projects.

Next steps

There are two government grants that can be used for double glazing, the ECO4 Scheme, and the Home Upgrade Grant. The Home Energy Scotland Grant can’t be used for double glazing unfortunately, but you can get an interest free loan through the scheme.

If you’re unsure whether you meet the criteria for any of these government schemes, it never hurts to check; they could save you thousands of pounds on your installation.

If you’re not eligible for any grants, it’s still worth investing in double glazing if you can. Replacing single glazing with double glazing can save you up to £180 a year on energy bills, according to the Energy Saving Trust.

We can make getting quotes easier for you.

Just fill in our short form, and we’ll pass your details on to professional double glazing installers. They’ll get in touch to give you a competitive quote based on your requirements.


Old or unused double glazed windows can be recycled. Window installers will typically remove old windows from your property for you, but not all of them recycle – the windows often end up as landfill.

If you want to avoid this, you might be able to recycle certain parts of the windows, such as the glass panes, at a local recycling centre. Or you can contact a window recycling specialist company, such as VEKA Recycling.

There are two double glazing grants that are open to pensioners, depending on their individual circumstances, the ECO4 scheme, and the Home Energy Scotland Grant and Loan.

The Welsh Government’s Nest scheme is coming to an end in March 2024, and has paused new applications, except from vulnerable people with no heating or hot water at home.

A new scheme, focused on low carbon heating and renewable technologies is set to replace Nest in April 2024. This could include new funding for solar panels, and heat pump grants.

Written by:
Tatiana has written about multiple environmental topics, including heat pumps, energy-efficient household products, and solar panels. She is dedicated to demystifying green tech to make eco-friendly living more accessible.
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