PRICE GUIDE · TRADES & CONSTRUCTION · 2026–2027
Window & Double Glazing Installer cost in the UK
£350–£1,500 per window. Typically £750.
Double glazed windows cost £350–£1,500 each in the UK, supplied and fitted, with about £750 typical for a good uPVC casement. Frame material is the main driver — uPVC is cheapest, timber and aluminium dearest — followed by window size, style, colour and how many you replace at once.
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HOW MUCH IT COSTS
How much does a window & double glazing installer cost in the UK?
| Low end | £350 | a standard white uPVC casement |
|---|---|---|
| Typical | £750 | what most people pay |
| High end | £1,500 | an aluminium or timber window |
Locufy guide prices for 2026–2027. Updated 2026. A national range, not a quote — enter your town above for real prices from the builders and trades near you.
What moves the price
- Frame material — uPVC windows cost far less than aluminium or timber frames
- Window style — casements are cheapest, while sash, tilt-and-turn and bay windows cost more
- Size — larger windows need more glass and heavier frames
- Colour and finish — woodgrain and coloured uPVC cost more than white
- Number of windows — replacing a whole house at once brings the price per window down
- Glass upgrades — acoustic, security and triple glazing add to each window
Building and repair prices in the UK are up 6% over five years (ONS Consumer Price Inflation, Services for maintenance and repair, to 2026 August). Five years ago a typical window & double glazing installer would have cost about £710 — an estimate from today's guide price and that index, not a recorded price. Source: ONS MM23 D7DO →
WHAT YOU GET
What a window & double glazing installer booking includes
Takes: One to three days for a whole house, a couple of hours for a single window. Not included: Repairs to rotten lintels or sills, internal plastering around the frames, and new blinds are usually priced separately — see the related guides below.
WHAT PEOPLE BOOK
Common double glazing jobs
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Window & Double Glazing Installer near you, with prices shown
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How to pay less
- Replace all the windows at once, as installers price double glazing lower per window on bigger orders
- Choose white uPVC casement windows unless the house needs sash or timber for its character
- Get new glass units fitted into sound frames instead of replacing the whole window
Before you book
- Use a FENSA or CERTASS registered installer so the windows are certified under the Building Regulations
- Listed buildings and many conservation areas need consent before windows are changed
- Ask whether the double glazing guarantee is insurance-backed in case the installer stops trading
- Check that bedroom windows meet fire escape rules and that trickle vents are fitted where needed
Window & Double Glazing Installer cost: questions people ask
£350–£1,500 per window, about £750 typical. A standard white uPVC casement costs least; aluminium or timber windows cost the most.
One to three days for a whole house, depending on how many windows and how much making good is needed.
Yes, replacement windows must meet the Building Regulations. A FENSA or CERTASS registered installer self-certifies the work and you receive a certificate.
Often, if the frames are sound. Replacing a misted glass unit costs far less than a whole new window.
Repairs to lintels or sills, internal plastering around the frames and blinds are usually extra.
They are Locufy guide prices for the UK, read from published UK double glazing costs — a national range, not a quote. Frame material and style set your price.