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Last updated: 11 July 2024

How Much Does Double Glazing Cost In The UK? (2024 Prices)

Double glazing cost UK
  • The average price for double glazing is £450 to £1,200, with certain options as low as £160.
  • The cost of double glazed windows depends on the window design and the material and size of the frame.
  • An A++ rated double glazed window can help you save up to £135 on your heating bills.
  • The price of double glazed windows can be mitigated with the help of various grants and government incentives.

Need help finding the best double glazed windows for your home? Replacing your single glazed windows with double glazing will drastically improve your home’s energy efficiency. As a result, you’ll enjoy a more comfortable home and also save money on your monthly energy bill. Double glazing costs can be as cheap as £160 but range all the way up to £2,700.

Before you buy double glazed windows, you should consider the style of windows, the frame material, the type of glass and the costs associated with double glazed windows. That’s why this price guide is here to help you determine which options best suit your needs and if your budget can cover the various double glazing windows costs. You can also watch our 7-step guide video below:

Buying New Windows - The Ultimate 7 Step Guide

If you’re looking for a good deal on windows, GreenMatch is also the place to go for double glazing installation quotes. We can match you with up to 4 local installers from the best double glazing windows companies in your area. All of our double glazing quotes are 100% free and with no obligations. Click the button below to begin.

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Double glazed windows prices in the UK

How much is double glazing? Double glazing costs in the UK are shaped by a few key factors - each with its own set of options for you to carefully consider. These include:

The frame material you choose will perhaps have the biggest influence over the final double glazing windows price. It’s also important you choose the material that best matches your home. The best material will vary from home to home, based on the design preferences and which features you prioritise most.

The cost estimates provided in this article refer mostly to singular double glazed windows, but how much is it to double glaze an entire house?

When planning a home renovation, it is very important to know that the number of windows that need to be replaced can affect the price. Sometimes installers might give a small overall discount for more units, so changing a single unit can be more pricey.

Here are the prices for windows based on materials and the size of the home:

How much does it cost to double glaze a house?
Number of windows uPVC Aluminium Wood
4 to 6 £2,320 – £3,480 £3,120 – £3,480 £3,480 – £5,220
8 to 10 £4,640 – £5,800 £6,240 – £7,800 £6,960 – £8,700
12 to 14 £6,960 – £8,120 £9,360 – £10,920 £10,440 – £12,180
16 to 18 £9,280 – £10,440 £12,480 – £14,040 £13,920 – £15,660

The double glazing average costs provided throughout this article are only estimates. For the most accurate costs based on your home’s specifications, it’s best to consult a professional double glazing installer. Learn more about the average cost of new windows for a 3 bed house (uk).

Costs can also depend on what you’re installer will charge, which is why it’s important to find a reliable one. That’s where our service comes in handy. We’ll match you with up to 4 of the best double glazing installers within our network. They have all been thoroughly vetted, so you can take advantage of the best local rates. All of our quotes are 100% free and come with no obligation.

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The average cost of double glazing

So, how much are double glazed windows? On average they can cost between £450 and £1,200 (when averaging the prices of single panel windows of all kinds. The cheapest options can start as low as £160 for uPVC casement windows.

Aside from the glazing and materials, the style of windows for your new double glazing installation will also impact the total price. Below we’ve provided price estimates for the most common window styles you can choose from.

These average prices are based on standard white uPVC windows (900 x 1200mm), not including installation.

  • Casement (single) | £455
  • Tilt & Turn | £570
  • Sash | £685
  • Bay (2,400mm x 1,200mm) | £1,460

So, how much does it cost to get double glazed windows? The total cost will also vary depending on the frame material you choose. The most common materials available are (from lowest to highest price):

What is the cost of double glazed windows?

The cost of new double glazed windows can vary between £160 and £2,500, with the average double glazed windows price being £450 to £1,200. As you can see in the table below, there’s a wide range of potential costs you can expect from buying uPVC, aluminium, or wood double glazed windows.

How much does it cost to get double glazed windows
uPVC Aluminium Wood
Casement £160 – £825 £210 – £1,075 £240 –£1,240
Sash £240 –£1,240 £315 –£1,615 £360 –£1,860
Tilt & Turn £200 – £1,030 £265 – £1,345 £300 – £1,550
Bay (3 panels) £1,190 – £1,800 £1,550 – £2,340 £1,785 –£2,700

As well as the style and material, additional costs such as handles, glass type, and installation can add to the end-price.

Finding the right style and material for your new double glazed windows comes down to subjective taste. It’s important to note that some designs may not be suitable for your home if you live in a conservation area. Size and number of panels can also increase any double glazed window cost.

How much does uPVC double glazing cost in the UK?

uPVC is the cheapest window material starting at £160 for small and simple casement windows but more elaborate designs can go up to £1,800.

uPVC double glazing costs
uPVC windows style Price range
Casement £160 – £825
Sash £240 –£1,240
Tilt & Turn £200 – £1,030
Bay (3 panels) £1,190 – £1,800

uPVC windows can be easily customised to fit any size and shape specifications. They also come in a variety of colours.. uPVC windows are known for their durability as they are unaffected by UV light, strong winds, and changes in moisture. Additionally, they require very little maintenance.

Since it has great heat insulation, uPVC can reinforce the energy efficiency of your double glazed windows and keep your home warm. They can last around 20 years with little degradation, so you can enjoy all their benefits for a long time.

How much does aluminium double glazing cost in the UK?

The cost of aluminium windows starts slightly higher than uPVC. With that being said, aluminium double glazed windows make a stylish, long-lasting addition to any home.

Aluminium double glazing costs
Aluminium windows style Price range
Casement £210 – £1,075
Sash £315 –£1,615
Tilt & Turn £265 – £1,345
Bay (3 panels) £1,550 – £2,340

Aluminium is highly durable, weatherproof, and easy to maintain. It’s strong enough to support large panes of glass while maintaining a sleek, slim frame providing a wider view.

While aluminium is a poor insulator, windows made from it are fitted with thermal breaks that prevent heat loss. It is easy to recycle and sustainably manufactured. Aluminium windows offer a very modern and contemporary look. You can find options with very slim and elegant frames that can complement a variety of architectural styles.

One downside to aluminium is that it is prone to condensation as it is an effective conductor of heat and cold. Aluminium windows tend to last 30 to 40 years, making them a lucrative long-term investment.

How much does wood double glazing cost in the UK?

While the cost of wooden double glazed windows will vary depending on the style you require, they start at higher prices than uPVC or aluminium.

Wood double glazing costs
Wood windows style Price range
Casement £240 –£1,240
Sash £360 –£1,860
Tilt & Turn £300 – £1,550
Bay (3 panels) £1,785 –£2,700

Wooden windows are usually made from hardwood, such as oak, but softwoods are also available. Despite its premium costs, hardwood is recommended for its longer lifespan as it can last 35 years on average (60 years with good maintenance). Wooden windows have a distinct aesthetic appeal making them especially popular in traditional or period homes.

Wood is also a natural material and a natural insulator. This makes it a more sustainable material than uPVC, and a more efficient insulator than aluminium. A significant downside to wooden windows is that they require more regular maintenance than other materials. Without semi-regular re-varnishing, wooden windows could be exposed to rot.

How much can I save with double glazing?

Savings graph

Compared to single glazing, double glazed windows can save between £150 to £135 annually. If you are concerned about double glazed window prices in the UK, it’s important to note that you will break even on your investment in about 2 to 8 years (when installing one window), while windows can last from 20 to 60 years. This means that they are possibly the most easily recouped investment for home energy efficiency improvements.

Cost savings gained with double glazing
Efficiency rating Potential cost savings per year Potential cost savings in 20 years
A+-rated double glazing £150 £2,700
A++ rated double glazing £135 £3,000

Furthermore, if you have single glazing currently, you can easily apply for a range of double glazing grants that cover double glazing.

Are there double glazing grants?

There are a few grants that can help improve your window insulation or fit you with better glazing. While there are no grants specifically geared towards providing new windows, some grants can help pay for the cost of double glazing in the UK (if you have single glazed windows). Some of these window grants include:

  • ECO4 scheme: In some instances, the ECO4 scheme can cover your home’s entire double glazed windows cost.
  • Home Upgrade Grant (HUG2): Allows for new glazing, doors, and draught-proofing across the UK.
  • Affordable Warmth Scheme: Meant for draught-proofing windows and doors and replacing single glazed windows Northern Ireland Residents earning under £23,000 annually September 2014 – ongoing.
  • Home Energy Scotland Grant and Loan: Allows for upgrades from single to double glazing and draught proofing on loan. As of August 2024, funding won't be available to those building their own homes, only to homeowners living in already existing buildings.

Be sure to check if you are eligible for these grants by contacting an installer or checking with your local authorities.

It’s important to note that these grants do not apply to more advanced forms of glazing. They are also not for entirely new window frames but rather apply to alleviating replacement double glazing costs. It cannot cover the cost to replace a double glazed window with a triple glazed one, for example.

Why buy double glazed windows?

Investing in double glazing in place of single glazing will bring multiple benefits to your home. Double glazing is an effective measure that protects your home more effectively than secondary glazing, but you'll end up paying far less than triple glazing costs.

Insulation double glazed windows

✓ Improved insulation

The gap between two panels of glass in your double glazed windows can either be filled with air or argon gas that maintains temperatures. Low-E glass will also further improve double glazing and window efficiency since it has a reflective layer of metal oxide that heat cannot pass through.

Insulation helps increase property value and keep homes energy-efficient, making the most of their heating systems.

Double glazing: lower energy bills

Lower energy bills

With double glazed windows, the amount of energy spent on heating or cooling your home will be decreased. Over time, this can bring significant savings, depending on the energy efficiency rating of your new windows.

A+ and A-rated double glazed windows can help you save up to £150 annually.

Double glazing: improved security

Improved security

Double glazing is sealed tightly to keep out the cold, but this also makes it more resistant to breakages than single glazing. As the glass is installed from the inside, the window beading can only be accessed and removed from inside the house.

For heightened security, you should consider toughened glass, and ensure your windows are fitted with a multi-point locking system. Toughened glass makes the possibility of breaking the glass harder, while laminated glass makes potential break-ins almost impossible.

Double glazing: reduced noise

Reduced noise

If you live in a busy area, outside noise could be a constant disturbance. Installing double glazed windows, however, will drastically reduce the amount of noise entering your home.

Sound is absorbed by the gas-filled space between your glazing panels by up to 36dB (decibels) or even up to 44dB using acoustic laminated glass.

Reduced condensation

With double glazing, moisture cannot pass through the airtight glass, meaning less condensation will build up on the inside of your windows. This helps avoid any structural damage, mould, and potential health complications. However, it’s important to note that condensation could still form on the edge of your double glazed window if you have aluminium frames.

Reduced carbon footprint

Double glazing: reduced carbon footprint

Since double glazing reduces your energy usage, those with a traditional gas-fired boiler will make significant long-term reductions to their carbon emissions. This is because there will be less internal combustion, thus resulting in less CO2 and other harmful greenhouse gases being released.

With A++-rated double glazing, you could reduce your home’s CO2 emissions by up to 410kg per year, which is the equivalent of 18% of the annual CO2 emissions produced by a gas boiler.

CO2 reduction with double glazing
Potential CO2 reduction per year Potential CO2 reduction in 20 years
A-rated double glazing 375kg 7,500kg
A++ rated double glazing 410kg 8,200kg

While double glazing is an energy-efficient measure that provides added security, triple glazing and secondary glazing are also valid options. The cost of replacing double glazing with triple is about 30% to 50% extra cost added on top. So why opt for double glazing instead?

Double glazed windows perform better than secondary glazing and have lower prices than triple glazing costs. Additionally, while triple glazing is more thermally efficient, the cost to replace double glazing with it might not be worth it if you don’t live in a cold enough region to benefit from extra insulation.

Is double glazing the right choice for my home?

Double glazing is certainly worth it, considering this long list of benefits. Despite the upfront costs, you’ll soon receive a return on investment given that you could save up to £135 per year.

Double glazing is a great choice for most homes in the UK as it provides better insulation, noise reduction, and increased security. It can also improve your home’s energy performance rating and property value. It performs far better than single glazing and prevents your home from losing heat and using up too much fuel to keep warm, thus saving you energy bills.

Based on our double glazed window price list, the average payback period for A-rated double glazing is 25 years. The table below shows the average payback time for a home with 8-10 windows according to the type of double glazing you purchase.

Payback period with A-rated double glazing (full house installation)
Material Average cost of double glazing (8-10 windows) Average payback period Material lifespan
uPVC £3,375 17 years 20 to 25 years
Aluminium £4,725 24 years 30 to 40 years
Wood £5,085 26 years 30 to 60 years

You can also cover the average price for double glazing with a windows grant, especially if you have single glazing since many regional grants pay for upgrades. It’s one of the many reasons you should consider a local installer for the job, as they can help you navigate grants in your area.

Don’t just take our word for it: our expert consultant also recommends local installers:

 What are the main advantages to seeking out a local installer?

Local window installation companies usually have specific areas where they operate. That allows them to have a more fast, more efficient and less expensive service than nationwide companies. 

The local installers have a great experience in the area, meaning they know the surroundings, the weather conditions, and the unique challenges and requirements of your area. They are familiar with and understand the building codes and regulations which is very important since they can vary from area to area.

If you are considering windows and need help finding the best installers, our service is here to help. Rather than taking up days of strenuous research, fill out a 30-second form and we’ll provide you with up to 4 free, non-binding quotes from reputable window installers near you. Click the button below to get started and find the lowest double glazing replacement cost in your area.

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