How much to double glaze a whole house?

A typical three bedroom house with around 8 to 10 windows costs roughly £4,500 to £7,500 in uPVC. Aluminium or timber pushes this higher.

Which window frames are cheapest?

uPVC casement windows are the cheapest. Aluminium costs more but is slimmer and stronger, and timber is the most expensive and needs maintenance.

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How much does double glazing cost in the UK?

Double glazing is priced per window, so the number and size of windows is the main factor, then frame material and glass spec.

From

£400

Typical

£550

Up to

£900

per window · typical UK job, 2026

Time on site: 1 to 3 days for a whole house

Price your double glazing

Adjust for your job and area to get a range.

What's included in the price

The window unit and frame
Removal of the old window and fitting
Trims, sealing and certification
Standard A-rated glass

What changes the cost

Number and size of windows
Frame material: uPVC is cheapest, then aluminium, then timber
Style: casement is cheapest, sash and shaped windows cost more
Glass spec and any colour or finish

Costs by area

London and the South East add around 15 to 20 percent.

Common questions

How much to double glaze a whole house?: A typical three bedroom house with around 8 to 10 windows costs roughly £4,500 to £7,500 in uPVC. Aluminium or timber pushes this higher.
Which window frames are cheapest?: uPVC casement windows are the cheapest. Aluminium costs more but is slimmer and stronger, and timber is the most expensive and needs maintenance.

These are independent guide prices based on typical UK jobs in 2026. Your actual cost depends on your property, spec, access and where you live. Always get at least three written quotes before committing.