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Double glazing cost guide

Double glazing has become commonplace in British homes, thanks to its insulating and protective benefits.

Replacing single glazing (or old double glazing) on your windows and doors will increase the security of your property, reduce your energy bills and help you regulate the temperature of your home better.

We’ve put together this double glazing cost guide to give you an idea of how much you’ll need to pay to install new double glazing in your home.

Double glazing jobRange - LowRange - HighAverage cost
8 windows and 2 uPVC doors£4,000£5,000£4,500
15 windows and 2 uPVC doors£6,000£7,000£6,500
20 windows and 2 uPVC doors£7,000£8,000£7,500

How much does double glazing cost?

Struggling to find an accurate price for double glazing? Costs will inevitably vary depending on the size of your house, the number of doors and windows you have, and what type of double glazing you choose. That said, here are some rough guide prices to help you plan your budget.

  • For a home with 8 windows and 2 uPVC doors, the average cost will be about £4,000 to £5,000.
  • If you have 15 windows and 2 uPVC doors the double glazing cost is around £6,000 to £7,000.
  • Double glazing for a larger home with 20 windows and 2 uPVC doors will cost in the region of £7,000 to £8,000.

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cost of double glazingFactors affecting the cost of double glazing

There are a number of factors that will affect how much you pay for your home’s double glazing. These include:

  • The number of windows and doors
  • The type of windows and doors
  • Quality of glass
  • Type of window and door locks
  • Access to the property
  • Any scaffolding needed
  • Where you live

It’s also useful to remember that double glazing quotes don’t usually factor in any special requirements, such as coloured door and window frames, A-rated windows, lead framed gloss or special locking mechanisms.

If in doubt, ask your local double glazing specialists to do a free inspection and consultation before giving you a quote.

Cost of double glazing a 3-bed house

The larger your home, the higher the cost of double glazing. The price you’ll pay for double glazing will directly depend on how many windows and doors your home has. The price for a 3-bedroom house will generally be higher than a 1-bedroom house.

When asking for a quote it’s best to count your doors and windows and then ask for a quote based on those numbers, rather than talking about the number of bedrooms your home has.

Window typeCasement (cost per window)Sash (cost per window)

Types of double glazed windows

One of the key factors that will affect the cost of double glazing for your home is the type of windows you have – both the style and material. Sash windows will cost more than casement windows, and uPVC will cost less than wood or aluminium.

The average cost for uPVC casement windows is £250 to £400 per window. If you want double glazing for uPVC sash windows, you should budget around £750 per window.

Wood casements windows cost between £400 and £1,000 each. For wood sash windows the cost is about £750 to £1,500 per window. While double glazing for aluminium casement windows will cost £350 to £600 each, or £1,000+ per window if you have aluminium sash windows.

Useful double glazing checklist

  • Count the number of windows and doors you want to install double glazing in.
  • Speak to your local double glazing experts for professional advice and accurate quotes.
  • Shop around for fair and competitive double glazing costs.
  • Always hire a tradesperson with experience and relevant qualifications and/or accreditations.

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