Energy Saving Grants | Government Grants for Energy Efficiency

Double Glazing Grants 2024: Funding Your Upgrade

Double glazing offers numerous advantages for your home, such as improved insulation, noise reduction, and enhanced security. However, the initial investment for double glazing can be a hurdle for some homeowners. Fortunately, government grants are available to alleviate these costs, particularly for vulnerable and low-income groups. 

These grants can significantly subsidize the expense of installing double-glazed windows. Further down, we’ll explore the various options of funding for double glazing available through these grants.

What Double Glazing Grants Are Available In 2023?

In 2023, several options are available for obtaining grants to cover the cost of installing double-glazing windows in the UK. These grants are mainly aimed at helping low-income households improve their home’s energy efficiency, including installing double glazing.

Energy Company Obligation (ECO4 Scheme)

One of the primary schemes is the Energy Company Obligation (ECO4), the fourth phase of the Government’s Energy Company Obligation scheme, running from April 2022 to March 2026. 

This grant supports low-income households unable to upgrade their homes and heating systems by partnering with major energy suppliers in the UK. 

It could potentially cover 100% of the cost of double glazing and provide successful applicants with up to £14,000 for energy-saving home improvements. The eligibility for ECO4 includes benefits like income-based jobseeker’s allowance, income-related employment and support allowance, pension credit guarantee, child tax credits, and more.​

Home Upgrade Grant

Another option is the Home Upgrade Grant, which offers grants from £3,000 to £24,000 for home improvements, including double glazing. This grant is available in 45 local authorities in England from April 2023 to March 2025 and is open to low-income homes off the gas grid. It could cover around 87% of the cost of double-glazing.​

Home Energy Scotland Grant

In Scotland, the Home Energy Scotland Grant and Loan scheme is available. This scheme, funded by the Scottish government, helps homeowners replace single glazing with double glazing. Successful applicants can get 75% off the cost of double glazing, significantly reducing the average installation cost​.

Local Authority Flexibility Grant

The Local Authority Flexibility, commonly known as ‘LA Flex,’ is a provision that allows local authorities to extend the eligibility for the Energy Company Obligation (ECO4) scheme to households that might not meet the standard criteria. 

This extension aims to aid households living in fuel poverty or those with low income and vulnerability. Homes with an Energy Performance Certificate (EPC) rating between D and G are also considered.

If you’re interested in securing funding for double glazing under LA Flex, the first step is to reach out to your local authority. They have the discretion to approve applications and can offer up to £10,000 in funding. This funding is dedicated to enhancing energy efficiency in homes, which includes installing double-glazed windows.

For those seeking to improve their home’s energy efficiency with double glazing, LA Flex presents a valuable opportunity to access financial support, especially for those who may not qualify under traditional eligibility criteria.​

What if You Don’t Qualify For Funding Of Double Glazing?

If you’re ineligible for double glazing grants, you can still save on costs through various methods:

  1. Compare and Negotiate: Get multiple quotes from different installers and negotiate the price. Installers are usually open to negotiations as they aim to secure sales.
  2. Choose Cost-Effective Materials: Opt for less expensive materials like uPVC frames instead of premium ones. Avoid extra decorative features that add to the cost.
  3. Fixed vs. Openable Windows: Consider having fixed panes in certain areas where openable windows are not necessary, as they are generally cheaper.
  4. Select Lower Energy Rating Windows: While the highest-rated windows (A+++) offer the best insulation, they are more costly. Windows with a B or A rating still provide good insulation and are more budget-friendly.
  5. Install During Off-Peak Seasons: Window installation tends to be cheaper in the winter due to lower demand, making it a good time to get a better deal, especially in early December.

How Much Can You Save With Double Glazing Grants 2023?

With double-glazing grants, significant savings can be achieved. For instance, the ECO4 and Nest grants can potentially cover the cost of purchasing and installing double-glazed windows. 

Meanwhile, the Home Upgrade Grant offers impressive savings of up to 87% or approximately £9,600. In Scotland, the Home Energy grant provides a substantial reduction, covering around 75% of the costs, which could save about £7,500. 

These grants significantly reduce the financial burden associated with upgrading to double glazing​​.

How To Qualify For Double Glazing Grant?

To be eligible for the ECO4 grant, a government initiative supporting double glazing costs, you need to meet the following criteria:

  • Be 18 years or older.
  • Receive at least one of these benefits:
  • Income-Based Jobseeker’s Allowance.
  • Income Support.
  • Housing Benefit.
  • Pension Credit.
  • Working Tax Credit.

These requirements are designed to assist individuals in specific financial circumstances to upgrade their homes with energy-efficient features like double glazing.

How Much Does Double Glazing Cost?

The cost of double glazing varies based on several factors, including the number of windows, the type of frame material used, and the specific design of the windows. 

On average, installing double glazing in a three-bedroom house is approximately £11,050. For smaller properties like a one-bedroom flat, the cost could be around £4,800. In contrast, larger homes such as a four-bedroom house may see costs exceeding £28,800 for double glazing​​.

Benefits Of Double Glazing Grants 2023

Double glazing can bring various benefits to a household, including:

  • Energy Bill Savings: Typically, households save around £235 annually on energy bills due to the improved insulation double glazing provides.
  • Reduced Carbon Emissions: The additional insulation layer helps lower heating usage, reducing carbon emissions.
  • Increased Warmth: The extra insulation from double glazing better retains heat than single glazing, making homes warmer.
  • Enhanced Security: These windows are thicker and more robust than single-glazed windows, making them more challenging to break.
  • Noise Reduction: Double glazing can diminish external noise levels by about 35 to 40 decibels, offering a quieter indoor environment.


In conclusion, double glazing offers significant home benefits, including energy savings, enhanced security, and noise reduction. While the initial cost varies, substantial savings are available through government grants like ECO4 and practical tips for cost reduction. Double glazing improves home comfort and contributes to environmental conservation through reduced energy consumption.

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