HomeHome & garden Home improvementsDouble glazingBy clicking a retailer link you consent to third-party cookies that track your onward journey. This enables W? to receive an affiliate commission if you make a purchase, which supports our mission to be the .19 Nov 2024Double glazing costsWe reveal the typical prices of double-glazed windows and doors, so you don't get caught out and overcharged when you get double glazing quotes.GTGeorge ThompsonMarket analystASAdam SnookResearcher & writerIn this articleBefore you start getting quotes for double glazing, having a clear idea of how much it should cost will help ensure you don't pay more than you need to.That's why we’ve worked with the Royal Institution of Chartered Surveyors (RICS) to find out the average prices for various types and sizes of double-glazed windows and doors.There are plenty of variables that affect prices, and every home is different. But our pricing research – which includes replacing windows and doors on the ground floor and also higher up – should give you an idea of how much double glazing will cost for your home.Make changes for the planet and your pocket. How much do double-glazed windows cost?When you know how much you expect to spend, take a look at the major and to choose where to buy.Only logged-in Which? members can view the information in the tables below. If you're not yet a member, to get instant access to our and .Replacing double-glazed windows at low levelDouble glazed window typePrices for various sizes in mm including 600x900, 900x900, 900x1,200 and 1,800x1,400uPVC casement windowSign up to revealGet instant access to this and all our scores and recommendationsAlready a member? uPVC single-hung sash windowuPVC double-hung sash windowAluminium casement windowAluminium single-hung sash windowAluminium double-hung sash windowHardwood casement windowHardwood single-hung sash windowHardwood double-hung sash windowSign up to revealGet instant access to this and all our scores and recommendationsAlready a member? Replacing double-glazed windows at high level (not exceeding 5 metres)Double-glazed window typePrices for various sizes in mm including 600x900, 900x900, 900x1,200 and 1,800x1,400uPVC casement windowSign up to revealGet instant access to this and all our scores and recommendationsAlready a member? uPVC single-hung sash windowuPVC double-hung sash windowAluminium casement windowAluminium single-hung sash windowAluminium double-hung sash windowHardwood casement windowHardwood single-hung sash windowHardwood double-hung sash windowSign up to revealGet instant access to this and all our scores and recommendationsAlready a member? If you want to find out more about the different types of double-glazed windows available, visit our page on .How much do double-glazed doors cost?The table below show prices for different back doors and garden doors. It includes uPVC sliding patio doors, French doors and bi-fold doors.You will also see that the costs can vary a lot depending on the quality of the ironmongery, or whether you reuse old fittings.New double-glazed doors now or to see the prices in the table.Double-glazed door typesReusing ironmongeryNew basic ironmongeryNew good-quality ironmongeryuPVC sliding patio door - one fixed panel and one sliding panel - white (1,800 x 2,100mm)Sign up to revealGet instant access to this and all our scores and recommendationsAlready a member? uPVC sliding patio doors - one fixed panel and one sliding panel - white (3,000 x 2,100mm)uPVC French door (1,490 x 2,090mm)uPVC external bi-fold doors (1,790 x 2,090mm)Sign up to revealGet instant access to this and all our scores and recommendationsAlready a member? Replacement windows and doors: what adds to the cost?To view these tips from experts, Which? members can , or you can now for access to all our reviews and advice.How will you pay for double glazing?Before you agree to any double glazing installation, make sure you understand how payment will work. In particular, will you pay in instalments? This should be made clear in your contract.It’s not unusual to pay an instalment upfront, especially if it’s a big job. But only pay the last instalment when you're satisfied that the work is completed to a satisfactory standard and all terms of your contract have been met.Money-saving tips for double glazingKeep your plans simple. White uPVC, with standard double-glazed A-rated glass, is usually the most economical option.Replace just the glass if possible. Sometimes steamed-up windows can be caused by a fault with the glass, rather than the whole window. So it’s possible to replace only the glazed unit.Shop around for quotes. We recommend at least three. Don’t accept the first quote you’re given by a salesperson, especially if they put you under pressure. Instead, haggle and ask them for their best price. Read our tips on to get the best price and avoid sales tactics.Compare quotes fairly. Make sure you get quotes for like-for-like windows from different firms so you can compare them accurately. Don’t be side-tracked by ‘extras’ added on by unscrupulous companies that obscure the true cost.What our calculations are based onTo arrive at these average costs, the Royal Institution of Chartered Surveyors (RICS) uses cost data from its Building Cost Information Service database, where costs are collated from a variety of sources and analysed.Everything needed to carry out the work is included in the costs, such as labour, materials, any preliminary work, contractor overheads and profit, and VAT.Materials costs are based on the best trade prices from a range of suppliers across the UK, which are then benchmarked to reveal the best national average. Labour rates are based on the current Building and Allied Trades Joint Industrial Council wage agreement. It then uses this data in a standardised model of the average double-glazed window and door types and sizes. Data copyright RICS 2024, reproduced with permission. Data is current as of November 2024.How to buy double glazingWhich is the best type of double glazing?How to buy double glazingWhat to look for when buying double glazingYour rights when buying double glazingDouble glazing repairs and maintenanceBack to topHow to buy double glazingWhich is the best type of double glazing?How to buy double glazingWhat to look for when buying double glazingYour rights when buying double glazingDouble glazing repairs and maintenance, How much does double glazing cost in 2025? Are you looking to install new double glazing in your home? Then you've come to the right place. In this guide we look at the average double glazing cost in the UK, and the options available., Use our tools to estimate costs, savings, and the best materials for your double-glazing project. Take advantage of grants and energy-saving incentives to reduce the cost of double-glazing installation..