Frameless Bi-fold Doors London: Costs, Styles & Top Installers 2025

Frameless and slim-frame bi-fold doors are the most requested glazing upgrade in London's most desirable postcodes. From garden extensions in Chiswick and Barnes to rear additions in Chelsea and Fulham — the right bifold system transforms how your home feels and functions.

What This Guide Covers

• Frameless bifold door cost London: £4,000–£14,000+ depending on width
• Aluminium slim-frame systems dominate the West and South West London market
• Heritage areas (Notting Hill, Belgravia) may require planning approval for external changes
• Thermal performance: look for Uw values below 1.6 W/m²K
• Bifold doors add an average of 5–8% to property value in London's prime postcodes

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?