How to buy double glazing
Double glazing prices
By Liz Ransome-Croker
Article 2 of 6
We reveal the typical cost of double-glazed windows and doors, so you don't get caught out and overcharged when you get double glazing quotes.
Before 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 what the average price is for different types and sizes of double-glazed windows and doors (autumn 2019).
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 level and also higher up – should give you an idea of what to expect to pay.
The tables below show how much you should expect to pay for various double glazing jobs. We've also got tips from double glazing experts to help you understand what hikes the price of double glazing and how you can therefore cut costs.
Only logged-in Which? members can view the information in the tables below. If you're not yet a member, join Which? now to get instant access to our double glazing company reviews and double glazing sales and quotes.
In this article find out:
- How much do double glazed windows cost?
- How much do double glazed doors cost?
- Replacement windows and doors - what adds to the cost?
- How will you pay for double glazing?
- Money-saving tips for double glazing
If you want to find out more about the different types of double glazed windows available, visit our page on choosing double glazing.
The table below show prices for different back or garden doors. It includes uPVC sliding patio doors, French doors and bi-fold doors.
You can also see from these prices that the costs can vary a lot depending on the quality of the ironmongery, or whether you use old fittings.
Before you agree to any double glazing installation, make sure you understand how payment will work. 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 are satisfied that the work is completed to a satisfactory standard and all terms of your contract have been met.
We asked experts, installers and homeowners for their tips on how to keep the costs of double glazing down.
What our calculations are based on
To arrive at these average costs, 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.
Material 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. Prices correct as of September 2019.