COST GUIDES
Aluminium vs uPVC windows: how much do they cost in 2026?
Updated 07/26
If you're replacing your windows, one of the biggest decisions is choosing the frame material.
Aluminium windows usually cost more than uPVC, but they offer slimmer frames, exceptional durability and a longer lifespan.
uPVC remains the UK's most popular choice thanks to its lower upfront cost and excellent thermal performance.
This guide compares the costs, benefits and key differences between aluminium and uPVC windows so you can decide which option offers the best value for your home.
Cost of aluminium windows vs uPVC windows
Aluminium windows generally cost more than uPVC, but the exact difference depends on the size, style and specification of the window.
The table below compares the average installed costs.
| Cost provided item | Range - low | Range - high | Average cost |
|---|---|---|---|
| Cost of aluminium windows | £350 | £600 | £475 |
| Cost of uPVC windows | £250 | £400 | £325 |
| Last updated: July 2026 Our costs are ballpark averages - get a local tradesperson to quote now | |||
Aluminium windows cost around £475 per window on average, compared to around £325 for uPVC. Both figures include supply and installation.
If you're considering aluminium sliding windows, expect to pay £340–£990, with an average installed cost of around £665 per window.
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When requesting quotes, let installers know how many windows you're replacing, the style you want and whether you're considering double or triple glazing.
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What's the price difference?
On average, aluminium windows cost around £150 more per window than comparable uPVC windows.
Replacing around 10–12 windows in a typical three-bedroom home could cost around £7,500 for uPVC, compared with around £12,000 for aluminium.
The exact difference will depend on the size, style and specification of your windows.
Although aluminium costs more initially, its longer lifespan means the difference becomes smaller when spread over the life of the windows.
Benefits of aluminium windows
Aluminium is one of the strongest materials used for window frames. Because it's so strong, manufacturers can produce slimmer frames that support larger panes of glass, allowing more natural light into your home.
Benefits of aluminium windows include:
Lifespan of around 40–45 years
Slim, contemporary frames with larger glass areas
Available in a wide range of RAL colours, including dual-colour finishes where inside and out are different shades
Resistant to rust and corrosion
Modern thermally broken frames provide excellent energy efficiency
Benefits of uPVC windows
uPVC is the most commonly installed window material in the UK and remains popular because it combines good energy efficiency with a relatively low purchase price.
Benefits of uPVC windows include:
Lifespan of around 20–35 years
Lower upfront cost than aluminium or timber
Good thermal insulation as standard
Wide range of colours and woodgrain finishes
Easy to clean with very little maintenance
If you're considering sash windows, see our uPVC sash windows cost guide for more detailed pricing.
What affects the cost?
Several factors influence the final price of new windows, regardless of which frame material you choose.
Window size: Larger windows require more material and larger panes of glass
Window style: Casement, sash and tilt-and-turn windows all vary in price
Glazing: Triple glazing costs more than double glazing but can improve thermal performance
Colour and finish: Standard white uPVC is usually the least expensive option, while coloured finishes and bespoke aluminium colours increase costs
Number of windows: Replacing several windows at once often reduces the average installation cost per window
Installation: Upper-floor windows, difficult access and scaffolding can all increase labour costs
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Which is best for your home?
The right choice depends on your budget, the style of your property and how long you expect to stay there.
Choose aluminium windows if you:
Prefer slim frames and larger glass areas
Own a contemporary home or a period property with large window openings
Plan to stay in your home for many years
Want almost unlimited colour options
Need stronger frames for larger windows
Choose uPVC windows if you:
Want to keep upfront costs lower
Are replacing standard windows in a typical home
Want excellent thermal efficiency at a lower price
Prefer a low-maintenance option
Want woodgrain finishes without the cost of timber
Maintenance comparison
Both of these window frame materials require very little maintenance.
uPVC usually only needs occasional cleaning with soapy water, while aluminium frames also require minimal upkeep and don't need repainting.
With routine cleaning and basic maintenance, both can provide decades of reliable performance.
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New windows cost calculator
The calculator below provides a guide price based on previous Checkatrade jobs.
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Aluminium vs uPVC window checklist
Before requesting quotes from window fitters:
Find a checked window fitter near you
A professional window fitter can help you choose the right frame material, supply your new windows and install them correctly.
When comparing installers:
Check they're registered with FENSA or CERTASS, so they can certify replacement windows comply with building regulations
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Compare a selection of itemised quotes
Check whether they'll supply the windows or fit products you've sourced yourself
Confirm what's included, including disposal of your old windows
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Enter your postcode to find a top tradesperson near you
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New windows FAQs
Yes. On average, aluminium windows cost around £150 more per window than comparable uPVC models, although the exact difference depends on the size and specification.
For many homeowners, yes. Aluminium windows last up to twice as long as uPVC, so the higher upfront cost is spread over a longer lifespan. If you're staying in the property for 20 years or more, the cost per year can be comparable.
Quality windows improve kerb appeal and energy ratings, which can help with a sale. Aluminium windows tend to suit contemporary properties where slim sightlines are a genuine selling point, but any uplift depends on your local market and the overall condition of the home.
Aluminium windows typically last 40-45 years. uPVC windows last 20-35 years. Both lifespans depend on build quality, installation standard, and maintenance.
Aluminium windows can be powder-coated in any RAL colour, including dual-colour finishes where the inside and outside frames are different shades. uPVC is available in a wide range of colours too, but the choice is more limited and the finish can fade over time.
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