Aluminium Windows Cost London 2025: What You'll Really Pay

Aluminium windows saw a 25.7% surge in demand in 2025, driven by their slim sightlines, longevity, and contemporary aesthetic. In London's premium postcodes — Kensington, Chelsea, Mayfair, Richmond, and Chiswick — aluminium has become the default choice for discerning homeowners.

What This Guide Covers

• Aluminium casement window cost: £600–£1,500 per window installed in London
• Slim-frame aluminium systems offer 30–40% more glass area vs uPVC
• Lifespan of 40–60 years vs 20–25 years for uPVC
• Available in any RAL colour — anthracite grey (RAL 7016) most popular in London
• Triple-glazed aluminium units now available for enhanced thermal performance

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?