Cost of Replacing a Window

Replacing your windows can improve the look and value of your home as well as increasing its energy efficiency and security. Although it can be expensive to replace every window in your property, the benefits outlined above can make it well worth the money you invest.

What is the cost of replacing a window?

The cost of replacing your windows will depend upon the style, materials used and size.  For a standard-size, double-sided, 2-pane, single opener ‘A’ Rated White uPVC window, expect to pay an average of between £550 and £650, including VAT and installation. To buy and fit a similar window yourself would cost around £250.

For an average three bedroomed semi-detached house with 8 windows, this would mean the cost of replacing all the windows would be between £3,000 and £4,000 for standard uPVC depending on the size of each window. Obviously, if you are adding new windows or increasing the size of existing ones there will be additional building work, and this will cost more.

Why should I replace my windows?

Obviously, if you have a window that is damaged, you will need to replace it. The cost of replacing one window will not be too much. However, if you are considering replacing all your windows this can be quite expensive. Still, there are several reasons why you might consider replacing your windows.

  • Energy efficiency – Modern windows tend to be more energy efficient than older ones. Replacing your windows will reduce your energy bills and this is good for your wallet as well as the environment.
  • Security – Old or damaged windows can be a security risk. New windows will be more secure, and they can also reduce the cost of your home insurance.
  • Adding to the value of your home – New windows and doors can increase the value of your home.
  • Improving the look of your home- New windows are one of the most dramatic ways to improve the look of your home. With a variety of styles and materials available it is easy to give your house a whole new look whether it is a period property or a modern home
  • Adding additional windows or doors – You may be considering increasing the size of your windows or adding additional ones. Installing extra windows or rooflights can flood your home with light, which will really improve the feel of your home. Adding glass doors or French windows can increase the connection with the garden and change the feel of your home considerably.

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What do I need to consider when buying new windows?

There are several things to consider when choosing your new windows.

  • Material – uPVC windows are the most cost-effective type. However, you can also have wooden or metal windows. If your house is listed or you live in a conservation area there may be restrictions on the style of windows and the materials used.
  • Number of openers – The cheapest windows have fewer openers. You should consider your needs carefully. You may like two small opening windows at the top of your windows so that you can let in the fresh air while still feeling safe and secure in your home.
  • Style – You will want to choose a style of window that complements your home’s architecture. For example, uPVC windows can be made in a style that replicates original sash windows in their appearance. You can also choose features such as leaded glass to replicate the architectural style and period of your home.
  • Colour- uPVC is not just available in white. You can also choose coloured or woodgrain options.

All new windows are extremely energy efficient. However, some are even better than the standard types. If this is important to you, choose windows with a higher energy efficiency rating. The rating system works from A to A+++. While the most energy efficient windows involve a higher initial outlay, they will save a considerable amount of money on heating bills over their lifetime.

Who should I hire to fit the windows?

You can buy windows from a supplier and fit them yourself. You can also buy the windows yourself and pay a builder to install them. However, most people choose a specialist window company to supply and fit their windows. For an average house, this job can be completed in less than a day.

What should I consider when choosing a window fitter?

You should keep in mind the following when hiring someone to fit your new windows

Get several quotes – Prices can vary considerably so you may want to ask family and friends for recommendations. Make sure each quote is for the same number, style and finish of windows. Also, check that the disposal of the old windows is included in the price.

Check what’s included in the price – Make sure you check that the price quoted covers supply, fitting, removal of old windows as well a warranty on the new windows

Take your time – Never feel pressured to decide right away even if you are offered special deals. Take your time to make the right decision and choose a company you feel comfortable with.


Replacing your windows is one of the most effective ways of updating the look of your home. No matter what else you do, shabby windows will always make your house look untidy. Added to that the increased security and energy efficiency of new windows and it makes this a job well worth doing.