Double Glazing Cost in London (2026)
Double glazing in London typically costs between £5,100 and £7,700 - roughly 28% above the UK average. Higher local labour rates and strong demand are the main factors driving prices up.
£5,100–£7,700
Typical range
£6,400
Average cost
+28%
vs national avg
1–3 days
Typical duration
Free, no obligation. Quotes from vetted tradespeople in London.
Important: Window installations must comply with Building Regulations. Your installer should either be registered with FENSA or a similar competent person scheme, or you will need to apply for Building Regulations approval from your local council separately.
London double glazing prices
Prices below reflect the typical cost of a double glazing in London, including materials and labour.
| Type | Details | London range | London avg |
|---|---|---|---|
| Small house (1-2 bed) | 4–6 windows, basic uPVC frames | £3,000 – £4,600 | £3,800 |
| 3-bed semi | 8–10 windows, standard uPVC throughout | £5,100 – £7,700 | £6,400 |
| 4-bed detached | 12–15 windows plus French doors | £8,200 – £12,200 | £10,200 |
All prices include materials and labour. Based on contractor submissions and market data, April 2026.
What affects double glazing costs in London
Double glazing costs depend heavily on the number and size of windows, the frame material, and the glass specification. In London, installation labour rates of £60–£90 per hour affect the fitting cost per window.
London has a huge range of property types, from Victorian terraces to modern new-builds. Older properties in inner London boroughs often require more preparatory work due to age and access constraints. Older properties with non-standard window sizes or stone surrounds often cost more to fit, as each window may need to be made to measure rather than using standard sizes.
Material costs in London are broadly similar to the rest of the south-east, though delivery within the congestion zone or ULEZ can add to supplier charges. The type of frame makes a difference too - uPVC is the cheapest option, timber is the most expensive, and aluminium sits in between.
Demand for tradespeople in London is consistently high throughout the year, which means less room to negotiate on price. The busiest time for window companies is typically spring and summer, so booking in autumn or winter may get you a slightly better deal.
How London compares
London double glazing costs compared to other UK regions and the national average.
| Region | Average cost | vs national avg |
|---|---|---|
| LondonYou are here | £6,400 | +28% |
| National average | £5,000 | - |
| South East | £5,600 | +13% |
| East of England | £5,300 | +7% |
How to get your double glazing for less in London
Get quotes from independent fitters, not just big brands
The large national double glazing companies often charge significantly more than local independent fitters in London. The products are frequently identical - the difference is in marketing and sales overhead.
Stick with uPVC unless you have a specific reason not to
uPVC frames are the most affordable option and perform well. Unless you live in a conservation area or have a listed building where timber or aluminium may be required, uPVC will give you the best value for money.
Replace all windows at once
Window fitters in London will give you a much better per-window price if you are replacing the whole house in one go. Doing windows one room at a time costs more in total because of the setup and scaffolding involved each time.
Frequently asked questions
How much does double glazing cost in London?
Is double glazing cheaper in London than other parts of the UK?
How long does it take to fit double glazing in London?
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