Double Glazing Cost

How much does double glazing cost?

Information & price guides for double glazed windows.


With many different types of double glazed windows and doors in the market place it's easy to get a little mixed up with how much a particular window or door costs.

So, in order to give you a good idea of current online cost of double glazing, we have brought together a selection of average prices for the most popular types of replacement windows and external doors, which we hope will help.

Hopefully, by having a good idea of what prices to expect, you should be more able to quickly spot a good deal (or a bad one).

The aim of this guide is to cover

  • The materials used to make double glazed windows.
  • Visual window design options
  • Major double glazed window price influences
  • A selection of double glazed window price guides

Double Glazed Window
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What features influence the cost of new or replacement windows the most?

The effect that construction materials & visual features have on the cost of the product,

Construction Material

What the frames are built from

If we exclude the most obvious price factor which would be size, then the material you choose for your windows is going to be one of the first things to have quite a marked effect on how much it costs. Most residential new or replacement windows are going to be made from either uPVC, Aluminium or Wood.

uPVC is a popular choice for many homeowners as it is quite cost effective to use, is a good natural insulator, is strong, light and lasts a long time. It is also virtually non-reactive to most air pollutants and does not over time like wood can.

Windows made of timber appeal to those who consider it to look and feel more natural. Softwood windows, however, are known for being high maintenance, even though they are low priced. Hardwood windows are much longer lasting although more expensive. An alternative is to make use of engineered timber which is very stable. It is also far more resistant to shrinkage, expansion or wood rot.

Aluminium went out of favour when uPVC became widely popular, but has made a significant comeback due mainly to advances in the finishing and design. This lightweight and structurally strong material allows for very slim frames and now can be found in 100’s of different colours. The frames can also be manufactured with a timber-grain effect surface which is very realistic.

Window type

The basic design style of the window is also a pricing factor. Broadly you have 3 main types:

Most other window styles, such as Bay, Bow or Tilt & turn, are really variations of one or more of the above basic design styles.It’s good practice to get your quotes in writing so that you can see exactly how much is being charged for each item, and to make sure the price includes everything you asked for.

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Visual Appearance

The extra touches for your windows

Fitting windows that suit your property is important, something that clashes not only looks bad, it can actually devalue your home. There are quite a few things that you can do to personalise your installations and some will attract an extra cost.

  • Window sections that open can be charged extra cost from some suppliers.
  • Coloured frames for uPVC cost more than white ones.
  • Georgian bars or inserts for glazing.
  • Wood-grain effect finishes are usually more expensive.
  • Some suppliers charge for trickle vents.
  • Window cills may or may not be included in the price.
  • Some may charge for different specification window furniture (chrome, coloured etc.)
  • Special glass, such as coloured patterned or leaded will be charged extra.
  • Higher window energy ratings attract higher prices.
  • Thickness of double glazed sealed units – up to 28mm.

Not every supplier makes charges for every extra, some will include items in their prices, other won't. So, it’s good practice to get your quotes in writing which means that you can see exactly how much is being charged for each item, and to make sure the price includes everything you asked for.

We recommend to get written quotes, based on a survey of your home, from at least 3 independent suppliers.get free quotesGo to top

How Much Do Casement Windows Cost?

Casement Windows Prices

One of the most popular styles.

One of the most versatile styles that can suit many homes.

This very popular window design is characterised by the side opening action. Variations include, hopper or awning casements that open from the bottom or top respectively.

Individual casement window prices
Approximate window dimension (mm)  Basic specification    Price Guide
Single Opener: 600 x 900 White uPVC / Double Glazed, B rated from £200
Single Opener: 1200 x 1200 White uPVC / Double Glazed, B rated from £300
Double Opener: 1800 x 1200 Sapele Hardwood, 24mm Argon Gas, Low-e glazing from £900 supply only
Double Opener: 1800 x 1200 Sapele Hardwood, 24mm Argon Gas, Low-e glazing from £800 supply only
Supply only casement window prices
Approximate window dimension (mm) Basic specification  Supply only prices
4 pane, 1 opener: 1800 x 1200  White uPVC (3 top panes open. Centre main pane fixed) from £299 +
 3 pane, no opener: 1800 x 1200 White uPVC (awning or side open) from £195 +
3 pane, 2 opener: 1800 x 1200 White uPVC (2 side pane awning, centre pane fixed) from £235 +
4 pane, 2 opener: 2400 x 1200 White uPVC (2 side pane awning, 2 centre pane fixed) from £325 +
Complete property casement window prices
Number of units uPVC frames Aluminium frames Hardwood Timber frames
Apartment or flat up to 4  £1,500 – £2,000 £2,300 – £2500 £2,000 – £2,500
Terraced up to 8  £3,500 – £4,000 £4,000 -£4,500 £4,000 -£5,000
Semi-detached up to 10  £4,000 – £4,500 £5,500 – £6,500 £5,500 – £6,000
Detached up to 12  £4,500 – £6,000 £6,500 – £8,000 £6,000 – £7,000
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How Much Do French Windows Cost?

French Windows Prices

A classic window design.

A window or door with both style and class.

With the characteristic small panes and mullions, French windows are easily recognisable. The latest products feature all the latest energy saving and security features.

A single fully fitted white uPVC French casement window can cost from £400 / size 1000 x 1200 mm - double glazed.
 DOOR Size in millimeters  Basic Specification  Average Fitted Price Guide
2 panel 900 x 2100 white, upvc double glazed £800 to £900
2 panel 1000 x 2100 white, upvc double glazed  £1,000 to £1,200
2 panel 1200 x 2100 Rosewood, upvc double glazed £1,200 to £1,400
White uPVC French doors sized 2500 x 2600 mm + 1 x side & 1 x top panel fully fitted, would cost approximately £950.00.
 WINDOW size in millimeters  Basic Specification  Average Fitted Price Guide
2 pane 500 wide x 1000 high white, upvc double glazed – C rated From £450
1000 wide x 1000 high white, upvc double glazed – C rated From £500
 1200 wide x 1000 high white, upvc double glazed – B rated From £550
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How Much Do Sash Windows Cost?

Sash Window Prices

True "period" styling.

A unique vertical sliding design

Seen widely in Victorian, Georgian or Edwardian period homes, the Sash windows remains the only one to use vertically sliding window openers, and does so with plenty of style. New Sash windows have improved security & energy efficiency.

How much do double hung sash windows cost?

Approximate Size (width x height in mm)  Frame Material    Supply only sash window price
Top & bottom sash openers: 500 x 1200  engineered wood / double glazed from £390 +
Top & bottom sash openers: 800 x 1200 engineered wood / double glazed from £450 +
Top & bottom sash openers: 1000 x 1200 engineered wood / double glazed from £465 +
Top & bottom sash openers: 1200 x 1200 engineered wood / double glazed from £565 +

How much do single hung sash windows cost?

Approximate Size (width x height in mm)  Windows material Supply only sash window price
 Bottom sash opens: 600 x 1000  white uPVC from £192
Bottom sash opens: 900 x 1000  brown uPVC from £260
Bottom sash opens: 1200 x 1000  white uPVC from £250
Bottom sash opens: 1500 x 1000  white uPVC from £282
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How Much Do Tilt & Turn Windows Cost?

Tilt & Turn Windows Prices

Two-way opening design

Versatile opening functions

The key feature of a Tilt & Turn window is its ability to open one way by "leaning" into the room for secure ventilation, whilst also being able to open and close just like a standards casement window.

How much do Tilt & Turn windows cost?

Approximate Size (width x height in mm)  Frame Material    Supply only window price
Single opener: 900 x 1000 White uPVC / double glazed from £220
2 pane with 2 openers: 1500 x 1200 White uPVC / double glazed from £350
3 pane with 1 opener: 2400 x 1200 White uPVC / double glazed from £360
3 pane with 2 openers: 2400 x 1200 White uPVC / double glazed from £500

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How Much Do Double Glazed Doors Cost?

External Doors Prices

Secure & great looking

Huge variety of External door designs

From the most basic timber front door to classy composite front doors or aluminium sliding patio doors. Double glazed door designs are built to take hard wear and look good for years.

How much do Double Glazed Doors cost?

Approximate Size (width x height in mm)  Basic Specification   Price Range 
Front Door 762 x 1981 White uPVC / double glazed from £390
 Front Door up to  1000 x 2200 Colour Composite/ double glazed from £900
3 panel Bifold Door up to 2500 x 2000 White uPVC / double glazed from £1700
2 panel Patio Door up to 2400 x 1200 White uPVC / double glazed from £1400

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