Our Updated Double Glazing Price Guide

There are so many reasons why you should upgrade to double glazing windows.

These windows are much more thermally efficient which helps to reduce your heating bills. They’re more secure than single pane windows, can increase the value of the home slightly and are a key selling point.

If you’d like to know how much double glazing costs, this page is for you. We can also help you get a competitive price, you just need to fill in this form.

We last updated our cost guide on the .

Our Double Glazing Cost Guide

Double glazing costIn 2015 and again in 2018, we contacted 28 different glazing firms from various locations around the UK and asked them to provide us with a written double glazing quote.

We wanted a price for eight windows, one patio sliding door and one front door, all in white Upvc.

The bathroom window was to be frosted, but otherwise, the installation was to be standard with no special requirements.

As you can see from the table below, the average cost to fit double glazing is £5400.00:

LocationSmall BusinessLarger Business (5+ employees)
London Area£5500.00£6500.00
South, SW and Midlands£5000.00£6000.00
Outer Region and North£4500.00£5000.00
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What Can Increase the Cost?

Bear in mind that our quotes were for a standard installation with no special or unusual requirements. We wanted typical double-glazed windows with a standard frame, nothing unusual or customised.

We know from experience that the following will increase the double glazing cost:

Coloured Upvc Frames – White Upvc frames are modern, cheap and mass produced. Coloured Upvc window frames such as Rosewood, Mahogany or Golden Oak effect are less common and can, therefore, cost up to 25% more to purchase, although the labour charges for installation is usually the same. The same applies to coloured Upvc fascia and soffit boards, white boards are cheap as chips, but coloured boards can cost over twice as much.

Lots of Window Openers – Windows without any openers are cheap, the more opening windows you have, the more expensive they will cost.

High-Level Windows – It’s quicker to install windows on a bungalow. A house with two levels will take a bit longer. A townhouse with three or four levels will take longer and may require scaffold at extra cost.

“A” Rated Windows – These are more efficient at retaining heat and can reduce your heating bills, but they come at additional cost, usually around 10% more expensive than “C” rated windows.

Lead Framed Glass – This costs more than standard plain glass.

Added Security – From Shootbolts to triple locking mechanisms, there are dozens of different types of locking systems designed to keep your property safe. This hardware costs extra and the more complex systems will add to the overall double glazing cost.

Type of Glass – There is also a wide choice of glass for most windows.

Triple Glazed Windows – These are more secure, more energy efficient and more expensive, although some installers offer seasonal free upgrades.

Double glazing cost and price guide

How Long Does it Take to Install These Windows?

We asked our chosen fitters how long they thought it would take to install the windows.

We were told that a team of two people will usually fit between 3-6 windows per day, depending on how big the windows are and any access issues, etc.

Look out for These Dodgy Sales Tactics

The double glazing window industry in the United Kingdom has a bad reputation for aggressive sales tactics.

To be fair, not all firms are like this but there’s no doubt that many are. From experience, we know that some of the larger well-known companies are the worst offenders.

The high-pressure tactic usually involves an extended visit to your property – perhaps several hours. The price will start very high, but you will get a discount for any of the following reasons:

  • First house on your road having this company install the windows.
  • If you agree to display an advertising board.
  • Discount only applies if you sign the agreement right now.
  • The salesman just needs to phone head office to confirm this amazing discount; it’s such a great deal he can’t authorise it without permission.

Of course all of the above are just sales tactics designed to put pressure on you.


Our advice is simple; never sign a contract without first spending a few days thinking about it and comparing it to other quotes.

We suggest you ignore all attempts to rush you into a decision, including all “same day” discounts, which believe-it-or-not will still be there next week.

Just get a written quote and make it 100% clear with the salespeople that you’ll be comparing quotes in your own time.

Trade Bodies and Organisations For The Double Glazing Industry

Fensa – This is one of the largest institutions within the double glazing industry. They are part of a government authorised Competent Persons Scheme for the replacement of windows, doors and roof lights in England and Wales. Visit their site here (opens in new window).

Certass – Is a UKAS approved certification body. Visit their website here (opens in new window).

Can You Trust Double Glazing Installers?

While my experience of double glazing sales staff has been awful, I’ve never had an issue with the finished product.

Trustworthy Tradespeople UK

How trustworthy do you think double glazing installers are?

We’ve created a poll where you can answer this question and also see where this trade ranks compared to others such as builders, plumbers and electricians.

Check out this page to see the results and cast your own vote.


What do think of our article about double glazing costs? Have you received prices for this type of work? What figures were you given?

You can leave a public comment at the base of this page.

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They can provide you with up to three prices for double glazing, all from local firms.

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2 Responses to “Our Updated Double Glazing Price Guide”

  1. SocDecember 27, 2016 at 3:03 pm #

    >>We contacted 22 different glazing firms and asked them to provide us with a written double glazing cost for a semi detached house. In total there 8 windows, one patio sliding door and one front door, all in white Upvc. The bathroom window was to be frosted but otherwise, the installation was to be standard, no special requirements.<<

    Please advise if the "8 windows" quote include two bay windows which is standard in some semi-detached properties.

  2. EmuboyMay 20, 2019 at 4:48 am #

    We had and old patio door removed and a big standard upvc French doors installed as well as a new upvc back door and a small upvc bathroom window replaced! Looked okay until you open them and look at the inside frame which are practically ‘butchered’ with empty drill holes and poor fixings! Charged £5500 from a company from ‘MyBuilder’ website! Left all the rubbish behind and said they will be back to clear it up! 2 weeks later paid £300 to hire a skip as was totally fed up with dealing with these bunch of so called professional home improvement company! Called back a few months later looking for more work and got told to fuck off!

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