How much does double glazing cost?

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£250 - £3,000







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Double glazing windows, from the name itself, is a type of window with double glass materials for better temperature control, unlike its singular counterpart. It’s commonly used in countries with colder climates due to its ability to add insulation to a home or a building. In the UK, double glazed windows cost anywhere from £250 to £3,000 for casement, £600 to £3,000 for sash windows, and even more expensive for tilt and turn windows.

If you want better temperature control during summer or winter, then it’s time to invest in this home must-have. Read on to know how much double glazed windows cost.

Price list for double glazing windows

The average cost of double glazed windows varies mainly on the window size if you only need replacement. Check out the estimated cost for the common glazing jobs. 

Type of window

Average cost

Casement windows

£250 to £1,250 for uPVC

£550 to £2,000 for aluminium

£900 to £3,000 for hardwood

Sash windows

£600 to £3,000

Tilt and turn windows

Around 25% more than casement

close-up photo of a double glazed window with snowFactors that affect the cost of double glazing

Hiring a glazier who has a professional experience for the job is crucial since this entails working with glass and gas. Here are some of the variables that influence the average cost of double glazing. 

Type of glazing

There are various types of glazing options you can consider. If you have an existing window, you can add secondary glazing, an economical way to improve your windows' heat retention and strength. 

On the other hand, retrofit double glazing is the best option to replace your existing single glazing with a new double glazing system. Replacing windows with double glazing or the cost of new double glazing entails a higher price. Hence, retrofit glazing is a more affordable option that is inconspicuous and quick to install. 

Type of window

Complicated or extra-large windows will increase labour costs. Typically, simple single- or double-paned windows cost less than lovered, bi-fold, or other multi-paned windows. You can order or have smaller panes cut by hand for your customised window if necessary.

See also: How much are new windows?

Energy Efficiency Rating (EER)

Do you want a better energy efficiency rating? Choosing an eco-friendly option can increase the cost of your window. But this will help lower your electricity bills in the long run. If your priority is to double glaze your window to reduce heating and cooling costs, it’s best to invest in windows with high EERs.


Another factor to consider is the cost of the new window frame. For instance, timber is more expensive than composite or aluminium double glazed windows. Wooden double glazing costs are higher since you will need a carpenter to use them. 

If you ever need to have your double glazed windows fixed, you can find a professional to repair them instead of installing new ones. 

a newly installed double glazed window


Is your window difficult to reach? Your glazier may need special equipment or scaffolding to install or replace your windows. For example, the cost of double glazing a 3-bedroom house or a two-storey house will usually cost more than a one-storey home, even if they have similar types of windows.

Installation costs

How are your window openings? Are they in good condition? If there is a need to restore the opening before a glazier can replace or install a window, hiring a carpenter should be added to the overall costs. While you’re at it, perhaps it’s a good time to update the look of your interiors if new windows are put in. 

See also: How much does it cost to replace windows?

Post a task to hire a double glazing installer

Now that you know how much it costs to double glaze a window,  you can hire a double glazing specialist for this project. In just a few steps, you can quickly connect with a nearby Tasker and have your window glazing updated. Here are some details you can mention when accomplishing the request form to ensure you get a more accurate cost estimate:

  • Your location and preferred schedule
  • Window opening condition
  • The preferred double glazing option
  • Additional services you might need

Ensure your windows get the right glazing application with the help of a professional. Post a task for double glazing and talk to reliable Taskers in a few hours. 

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Since it improves the effectiveness of your heater or air-conditioning, these windows can help you save on electricity bills. Regular windows usually have no insulation. It’s the air pocket in double-glazed windows, which provides this energy-saving property. 

It depends on the size and complexity of your window. On average, each window takes around 1-3 hours to install.

Yes, it is considered an investment and can boost your property’s value. Resale values can go up to a 2% increase. 

Yes. Aside from insulation, it can also reduce noise pollution from entering your home. This is especially helpful for homeowners in urban areas with loud traffic noises.

Yes, but it depends on the condition of your current window and window openings.

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