UK price guide · Updated 26 Sep 2026

Double Glazing Cost UK

A typical medium white uPVC double-glazed replacement window currently centres around £526 fitted nationally. A five-window project using that same common specification centres around £2,445, while ten windows centre around £4,732 before any unusual site work.

Fitting includedVAT includedUK market estimate

Current price examples

These examples use the same current pricing engine as the calculator. They are market estimates rather than binding installer quotations.

1 typical window£379–£673Most likely around £526 · 1200 × 1200 mm

5 typical windows£1,760–£3,130Most likely around £2,445 · Multi-window job efficiency included

10 typical windows£3,407–£6,057Most likely around £4,732 · Multi-window job efficiency included

Double glazing cost per window

There is no single reliable per-window figure because size, opening layout and frame system matter. A small bathroom window and a large lounge window can use very different amounts of frame, glass and hardware. Single-window jobs can also cost proportionally more because setup and survey costs are not spread across a larger order.

What about the cost of double glazing a whole house?

For a like-for-like project of common medium white uPVC windows, the current model centres around £3,786 for eight and £5,552 for twelve. Real homes contain mixed sizes, doors and bays, so use these as orientation rather than a house quote.

What affects the price?

Window count and mix of sizes
Opening layout and colour
Standard versus flush/sash/aluminium systems
Region and installation conditions

What “fitted” means here: supply, standard replacement installation and ordinary 20% VAT are included. Unusual access, scaffolding, structural repairs, planning/listed-building requirements and highly bespoke work can sit outside the standard estimate.

Explore the UK Window Price Index 2026Regional, size & specification data →

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Questions people ask

Short answers to the most useful questions around this price topic.

How much does double glazing cost per window?

A common 1200×1200 standard uPVC example centres around £526 fitted nationally.

How much is double glazing for a whole house?

A ten-window project using the same medium specification centres around £4,732 in the current model, but a real house normally mixes sizes and styles.

Does the estimate include fitting?

Yes. Standard fitting and ordinary 20% VAT are included in the model.

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