Bi-fold Door Cost UK: Complete Price Guide

Bi-fold doors are the most transformative glazing upgrade for any London home with a rear garden or terrace. But prices vary enormously depending on the system, material, and number of panels. Here is an honest breakdown of what you will pay in 2025.

What This Guide Covers

• uPVC bi-fold doors: £2,000–£4,500 for a 3-panel system
• Aluminium bi-fold doors: £3,500–£9,000 for a 3-panel system
• Each additional panel adds approximately £600–£1,200
• Aluminium accounts for 70%+ of all bifold installations in prime London postcodes
• Most popular finish: anthracite grey (RAL 7016) on the exterior

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?