Double Glazed Window Costs 2023 Written by Beth Howell Updated on 4 September 2023 ✔ The average cost of a double-glazed window is £1,200✔ Double glazing for a three-bedroom house costs £11,050 on average✔ The average bay design is twice as expensive as almost any other typeDouble glazing is a win-win-win: it will typically save you £195 per year on heating bills, make your home harder to burgle, and keep you shielded from the noise and cold of the outside world. All of these benefits for the average cost of £1,200 per window.Want to skip the reading? You can compare the best double glazing prices by popping a few details about your home in our easy-to-use quote tool. We’ll pass on your details to our trusted suppliers, who’ll get in touch with you with free quotes for you to compare. What type of double glazing do you need? Aluminium frame uPVC frame Wooden frame Other / not sure Get started Loading What's on this page? 01 How much does double glazing cost? 02 Double glazing cost calculator 03 Double glazing savings calculator 04 The cost of double glazing based on house size 05 Factors that affect the cost of double glazing 06 How much money can double glazing save you? 07 Cost of replacement vs new 08 The cost of double-glazed doors 09 Double glazed windows: maintenance costs 10 Summary 11 Double glazed windows costs: FAQs How much does double glazing cost?Type of window frame (100cm x 100cm)Average cost per windowuPVC£1,200Wood£1,500Aluminium£1,800Steel£2,500Prices are an average from various window suppliers, based on our independent research. Last updated August 2023.If you're replacing your windows at home, you can expect to pay an average of £1,200 per window.However, every window is special, standard sizes don’t really exist, and every supplier will charge you different amounts – but you need to be able to compare prices.On top of this, installation can cost around an extra £250, but it’s worth it for that professional touch. Bear in mind that if your installer needs to put up scaffolding to get to your window, that’ll also cost extra – and the higher the window, the higher the price. If you’re getting a bay window replaced, installers will also need more time (and, therefore, more money) to fit it. It’ll take about half a day for two people, whereas simpler models like casement windows can be done and dusted in a couple of hours.Want to cut back on costs but improve your property's insulation? You could look into draught proofing your windows.The cost of double glazing a three-bedroom houseLooking to install more than one double glazed window into your property? The price will mount up pretty quickly.Installing double glazed windows in the average three-bedroom house in the UK will cost around £11,050, including installation. However, this figure will increase if you're installing pricier models, such as bay windows, or using an expensive material, such as aluminium.The cost of double glazing based on window styleWindow styleSizeAverage cost (not including installation)Casement 1,000 x 1,000£600-£900Tilt and turn1,000 x 1,000£750 – £1,125Sash1,000 x 1,000£900 – £1,350Bay windows (three sections)3,000 x 1,200£1,500 – £2,250Last updated August 2023.Window prices vary widely based on style, but in general, casement windows – with their simple hinges and traditional appearance – are the cheapest option. There’s a reason why they’re the most common window type in Europe.Sash windows, which are more popular in the UK days, are a little more expensive. However, they're just as intuitive as their casement counterparts: just push up or down to open and close.You could also opt for the slightly pricier tilt and turn, which can be opened horizontally or vertically, or a dual turn, which is a sash window where both parts rotate vertically instead of sliding up and down.The most expensive style is the bay window. These large windows let in a lot of light, and create the illusion of a bigger space – but they’ll cost you. The average bay design is twice as expensive as almost any other type. Double glazing cost calculatorUse our double glazing cost calculator to check how much you're likely to pay for your new windows. Double glazing savings calculatorWith this second calculator, you can find out how much typical households of different sizes are likely to save with new double-glazed windows.Though of course, this doesn't measure the lovely comfort of having a warmer home. What type of double glazing do you need? Aluminium frame uPVC frame Wooden frame Other / not sure Get started The cost of double glazing based on house sizeCheck out the table below to get a better idea of how much you can expect to spend on your new double glazed windows. These figures don't including installation, which costs around £250 per day.Property sizeNumber of windowsWindow frame materialAverage costFlat4uPVC£4,800Flat4Wood£6,000Flat4Aluminium£7,200Bungalow8uPVC£9,600Bungalow8Wood£12,000Bungalow8Aluminium£14,400Mid-terrace12uPVC£14,400Mid-terrace12Wood£18,000Mid-terrace12Aluminium£21,600Semi-detatched16uPVC£19,200Semi-detatched16Wood£24,000Semi-detatched16Aluminium£28,800Detatched20uPVC£24,000Detatched20Wood£30,000Detatched20Aluminium£36,000Last updated August 2023.As you can see, the costs of a new set of windows will vary, depending on the amount you get, as well as the material you pick. But remember, these are just estimates – the price of your windows will fluctuate depending on the size, type, and style you choose. If you’d like to learn more about the cost differences between window types, head over to our Best Double Glazed Windows page. Did You Know? You should expect to pay an extra amount of between 10% and 20% of the cost to add a colour finish. Factors that affect the cost of double glazingMany factors affect the cost of double glazing, which is why prices can vary widely from window to window. Here are some of the key ones:Window styleFrame materialType of glassWindow sizeExtra finishesWindow style is a very big cost determiner. The main reason the difference in prices between styles is the complexity of the design. Casement windows – the cheapest kind – have simple hinges, whilst more expensive sash windows require a pulley and weight mechanism to operate.Frame material will also affect the cost, since some materials, such as wood timber, are more expensive to manufacture than others, such as uPVC. The higher cost of the frame will be added onto the overall cost of the window.The type of glass a window has will also affect the price. Glass rated A++ for thermal efficiency (meaning it has high insulating qualities) is more expensive than glass with a lower rating, such as B or A. But that’s not all, coloured, grainy, or obscure glass, will all be more expensive than standard glass.Window size affects the cost of double glazing in a straightforward way. The larger a window is, the more material it uses. More material equals a higher cost.Extra finishes, such as window locks, additional window openings, or ornate window handles will all add the the overall cost. These types of personalised designs aren't standard, so they require extra manufacturing. How much money can double glazing save you?Homeowners can roughly £195 a year on heating bills by installing A-rated double glazing windows in an entirely single-glazed semi-detached property, according to the Energy Saving Trust.Want to go a step further? You could try installing A++ rated double glazed windows, which will typically lead to savings of about £235 a year.We’ve outlined how much money you could save each year if you install double glazing on an entirely single-glazed house: Get free double glazing quotes Answer a few quick questions, and our trusted installers will send you bespoke double glazing quotes – for free. Compare now Cost of replacement vs new double glazingSome homeowners might be able to get away with just replacing the glass in their windows, rather than getting rid of the window altogether and buying a new one.Not only is this cheaper, but it can also avoid having to fork out a few hundred for expensive installation costs.According to CheckaTrade, the average replacement double glazing window cost is £250 – much more affordable than the average £1,200 to get a new one.However, replacing the glass in your double glazed windows won't solve all your issues.For example, if your windows have a misting issue, it sometimes means moisture has seeped into the gap between the panes of glass – in this circumstance, glass replacement is the right thing to do. However, if there's an issue with the frame, glass replacement will just be a waste of time and money – you'll have to replace the whole unit.Want to find out about more cheap double glazing options? Check out our page, Second-Hand Double Glazed Windows: Are They Worth It? The cost of double-glazed doorsPrices start as low as £300 for a 90 x 210cm front door with double-glazed glass, though this will rise to around £550 when you include the installation cost.The average overall cost for a double-glazed front door is £700, though your exact price will depend on the materials used, your supplier, and how large your product needs to be.Sliding French doors with double glazing carry a heftier price tag, and the bigger they are, the harder they are to afford.You can expect to pay an average of £1,200 for this type of design, though prices can go as high as £2,000 – so make sure to decide beforehand how much you want to spend. Double glazed windows: maintenance costsDouble glazed windows do not require a lot of maintenance. The main thing you need to do is clean your windows once or twice a year.You can clean the windows yourself, but you can also hire a professional. Window cleaning costs £40 to £150, depending on the area and the size of the house.If there's condensation on double glazing, it could be a sign that there’s a gap in the sealant. Having this fixed will typically cost £20 to £70.Other small issues such as broken hinges cost around £80 to repair, whilst a broken window pane will cost around £150 to fix. Next stepsDouble glazing costs a sizeable amount, but it can improve your property by providing an extra layer of insulation, saving you money on bills, and adding more security to your home.If you’re ready to buy a new window which will help you to banish the cold, repel external sounds, exile condensation, and keep burglars out, then double glazing is the one for you.Fill in your details for free quotes and get moving towards your double-glazed future.7 tips to help you get the best deal on double glazingShop around and get multiple quotesIf you get a company to measure your windows and give you a quote at home, hear them out – but don’t sign a contract on the spotHire a professional to install your new double-glazed windowsGet a locally based company for the installation, as its workers won’t have to spend as much time travelling to and from the job, and therefore won’t have to charge you extraCheck you don’t live in a conservation area or listed buildingDecide ahead of time how much you and your loved ones want to spend on the new windowsCheck the U-value of a window before buying it – it should ideally be around 0.6 or lower Double glazed windows costs: FAQs Who can fit double glazing? It’s actually possible to fit double glazing yourself – but it’s not recommended. Although you’ll be able to save money on the installation, it could lead to inefficient windows, more expense in the long run, and possibly an injury. What accreditations should I look for? The following authorities play an important role when it comes to ensuring high standards in the double glazing industry:Fenestration Self-Assessment Scheme (FENSA): Members who are registered with FENSA are compliant with up to date thermal performance standards, which means that the double glazing they install meets the necessary energy-efficiency standardsDouble Glazing & Conservatory Ombudsman Scheme (DGCOS): Monitors UK double glazing installers to make sure they meet appropriate quality and service levels. This means that those using a DGCOS-registered company are able to benefit from increased protection Certass: This government-backed agency operates on a not-for-profit basis, and aims to increase consumer confidence through the evaluation of registered contractorsTrustMark: TrustMark endorses companies in a variety of trades and industries as long as they meet government-approved guidelines and standards What should your double glazing quote include? Your double glazing quote should provide you with an estimated price of replacing your windows – tailored to your specific requirements. Since there are so many varying factors affecting the price of windows, we wouldn't recommend relying on just one quote. This will give you a better idea of what a reasonable price actually looks like. Local vs national installers: who should you choose? Local and national installers both have their pros and cons. On the one hand, local installers are likely to provide a cheaper deal, whereas national companies are more likely to be trusted by users because they’re more well known. You can learn more about local and national double glazing companies, which one will be better for you, and how we rate them by visiting our Best Double Glazing page. What type of double glazing do I need? There are lots of different options when it comes to the type of double glazing you want for your home – however, the one you go for will depend entirely on your circumstances. We’ve listed a few of the main options below:Annealed or float glass – This is basic double glazing glass. It’s the cheapest option, quite strong, and difficult to break, especially when used in double glazed fittingsToughened or tempered glass – This is about three to four times tougher than float glass. However, because of its safety features and specialised manufacturing process, it’s one of the more expensive optionsLaminated glass – This acts as a layer of security for your double glazing. The PVB (polyvinyl butyal) laminate is very secure – if the glass ever breaks, it remains stuck to the laminateNoise-reduction glass – This glass has acoustic inner layers of PVB, which absorb sound so that very little of it makes its way inside. To make it even more effective, you can use layers of different thickness Factors which will affect the price of double glazing The overall price of double glazing will depend on the:StyleFrame materialCompany you chooseNeed for scaffoldingNumber of windows you want How do colours and types of glass affect the price of windows? Not only does the frame affect the price of your window, but the glass does, too. Double glazing has come on leaps and bounds in the past decade, offering a range of different types of glass which all serve a different purpose. If you’d like a basic double glazed window, you could go for annealed (otherwise known as float) glass. It’s the cheapest option, but is still particularly difficult to break. On the other hand, if you want to go for an even stronger glass, such as toughened or tempered glass – which is about three to four times tougher than float glass – this will cost you. Written by: Beth Howell Content Manager Beth has been writing about green tech, the environment, and climate change for over three years now – with her work being featured in publications such as The BBC, Forbes, The Express, Greenpeace, and in multiple academic journals. Whether you're after a new set of solar panels, energy-saving tips, or advice on how to reduce your carbon footprint, she's got you covered.