How Much Does Double Glazing Cost in London in 2025?

Double glazing remains one of the most popular home improvements in London — particularly in affluent areas like Kensington, Chelsea, Wimbledon, and Richmond, where homeowners demand both performance and aesthetics. In this guide, we break down real 2025 prices.

What This Guide Covers

• Average double glazing cost per window in London: £300–£900
• Aluminium frames cost 20–40% more than uPVC but last longer
• Kensington & Chelsea properties often require heritage-style glazing bars
• Conservation area properties may need sympathetic sash-style double glazing
• Always get a fixed written quote — prices vary significantly by postcode

Introduction

London homeowners face unique challenges when it comes to glazing — from period properties with sash windows in conservation areas, to modern developments requiring structural glass installations. Getting the right advice before you commit can save you significant time and money.

At BuilderFix Glazing, we have completed thousands of glazing jobs across Greater London and Surrey — from emergency repairs in Kensington and Chelsea, to bespoke walk-on glass installations in Mayfair and Belgravia. This guide is based on real experience and the questions our customers ask us most often.

What Does This Typically Cost in London?

Costs vary depending on the type and size of work, the glass specification, frame material, and access. As a general guide, always obtain a free written quote before committing — this protects you from unexpected charges.

At BuilderFix Glazing, we provide free, no-obligation written quotes for all work. Our prices are transparent and fixed before we start — no surprises on the invoice.

What to Ask When Getting a Quote

• Is the price fixed, or could it change once work starts?
• What glass specification is included?
• Are all fixings, sealants and finishing included?
• What compliance documentation will I receive?
• What happens if there is an issue after completion?