How much does double glazing cost?

Double glazing full cost guide

A double glazing cost guide gives homeowners a clear overview of what to expect when budgeting for new or replacement windows. It breaks down the average prices for different window types, materials, and styles, helping you understand how factors like window size, number of units, and frame choice affect the total cost.

We'll cover the following topics in this cost guide:

1. Average double glazing cost in the UK
2. Double glazing specialist costs
3. Different double glazed window options
4. Cost of repairing double glazed windows
5. How to calculate full double glazed window costs
6. Find a double glazing service near you on MyBuilder
7. FAQs Common questions about double glazing costs

Average double glazing cost in the UK

In the UK, double glazing typically costs £100 to £300+ per window, depending on the size, frame material, and whether you choose a standard or bespoke design.

For a whole house, expect to pay around £4,500 on average for installation. While this may seem like a big investment, quality double glazing can lower your energy bills and make your home warmer and more comfortable year-round.

Take a look at the average costs for double glazing, depending on the size of your house:

Job	Average material cost
Flat with 4 windows	£1,300
House with 8 windows	£2,500
House with 10 windows	£3,000
House with 15 windows	£4,500

Double glazing specialist costs

Window fitters in the UK typically charge £25 - £35 per hour or around £200 - £280 per day.

Although hiring a professional fitter may seem pricier than DIY, it offers several advantages:

• Precision and safety: Professionals ensure the installation is done correctly for top thermal efficiency.
• Warranties and peace of mind: Many offer guarantees on their work.
• Time and cost savings: Fitters can identify and avoid potential issues in your double glazed windows early.
• Regulation compliance: Local fitters will understand current building standards and the latest products.

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Different double glazed window options

Double glazing options in the UK offer a variety of styles, glass types, and frame materials to suit different homes, budgets, and needs.

Take a look at your different options:

Window styles

Common styles include casement windows, which hinge on the side and open outwards for good ventilation and easy cleaning. Tilt-and-turn windows tilt inwards from the top for ventilation or swing fully open, popular for safety in family homes. Find out tilt and turn windows cost here.

Glass types

Standard double glazed units (DGUs) have two glass panes with an air or argon gas gap between them for basic insulation. Low-E glass has a special coating that reflects heat and blocks UV rays to save energy. Toughened glass is safer as it breaks into small, blunt pieces, while laminated glass holds together if shattered.

Frame materials

uPVC frames are the most popular for their affordability, low maintenance, and insulation. Aluminium frames provide sleek, strong designs for modern homes but conduct heat more. Timber frames offer a traditional look but require upkeep, while fibreglass excels in durability and weather resistance at a higher cost.

If you also want to consider getting triple glazed windows installed, have a look at this triple glazing cost guide here.

Cost of repairing double glazed windows

Double glazing repairs in the UK are often more affordable than full replacements, typically ranging from £50 to £500 depending on the issue and window size.

Common problems like seal failure (causing misting), handle faults, or hinge issues can usually be fixed on-site without removing your entire unit.

Common repair types and their costs:

• Misted or foggy windows (failed seals): £75 - £200 per pane. Involves replacing the glass unit while keeping the frame.

• Broken handles or locks: £50 - £150, including parts and labour. Quick fix for most uPVC windows.

• Hinges or mechanisms: £100 - £300, especially for tilt-and-turn styles.

• Cracked glass: £150 - £500 if toughened or laminated panes need swapping.

If you want to know about repairs more in detail, you can review this double glazed window repair guide here.

How to calculate full double glazed window costs

Here's a simple, step-by-step guide to estimating your double glazing costs:

1. Measure your windows: Work out the size of each one (in square metres) to know how much glazing you need.

2. Calculate materials: Use average prices: £100 (small), £200 (medium), £300+(large). Multiply by the number of windows.

3. Add labour: Fitters charge £25 - £35/hour or £200 - £280/day, depending on your area.

4. Include extras: Budget for special features like coloured frames, sash, bow, or bay windows.

5. Add 10 - 15% buffer: For surprises like unexpected fixes.

It’s easy to get a better idea of your double glazed window costs on MyBuilder. Just post your job today, and we will help to connect you with double glazed window specialists in your area.

Finding a verified double glazed window fitter is easy, free and quick with MyBuilder.

Find a double glazing service near you on MyBuilder

Find a double glazing service near you on MyBuilder. Post your job and browse our directory today, and find verified installers near you who are ready to take on the job.

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FAQs Common questions about double glazing costs

How much does a single double glazed window cost?

A basic uPVC casement window (around 600x900mm) starts at £160 - £250 including VAT, but expect £400 - £600 for standard sizes in garages. Larger sash or bay styles, or premium timber/aluminium frames, can reach £1,000 - £1,500 due to added materials and complexity. ​

How much does it cost to double glaze a whole house?

For a 3-bed semi-detached home with 10 - 15 windows, budgets range from £4,000 - £7,000 using uPVC for good value. Premium options hit £10,000 - £15,000.

Are there grants or savings for energy-efficient glazing?

Yes, schemes like ECO4 or the Great British Insulation Scheme may cover 50 - 75% for low-income or hard-to-heat homes, especially with A++ rated glass. Pairing with cavity wall insulation maximises savings on heating bills long-term.

uPVC vs aluminium vs wood windows. Which is the best value?

uPVC delivers top value with low upfront costs, minimal maintenance, and solid energy ratings (U-values around 1.4 W/m²K). Aluminium excels in slim profiles for more glass area but costs more. Wood offers superior aesthetics and insulation yet demands regular painting/sealing, suiting period properties.