Bifold Door Costs London (2026 Price Guide) | Window Fitters Ltd

Aluminium Bifold Door Pricing & Cost Breakdown Guide

Installing bifold doors is one of the most popular ways to open up a kitchen or living room extension, connecting indoor living spaces with the garden. However, because bifold systems are highly engineered and structurally complex, they require a significant financial investment. This guide breaks down the typical costs of supplying and fitting bifold doors in London and Surrey, comparing materials, sizes, and installation rates.

Expert Reviewed by Marian Gheorghe, Head Window Fitter - Last reviewed: July 2026

What Key Factors Influence Bifold Door Costs?

Unlike standard external doors, bifold doors operate on complex roller-and-track systems. Several variables will impact your final quote:

1. Frame Material: The most significant factor. uPVC is the most affordable option, timber provides a classic look, and aluminium is the industry standard for strength, narrow sightlines, and reliability.
2. Number of Panels (Width): More panels require more glass, tracking hardware, rollers, and labour. Common configurations range from 3-panel (approx. 2.4m wide) to 5-panel systems (approx. 4m wide).
3. Sourcing Choice: Choosing a turnkey Supply and Fit contract (where we measure, order from trade manufacturers, and fit) vs. an Installation Only labour package for doors you have sourced independently.
4. Structural Alterations: If we are inserting a new opening into a solid brick wall, we must install structural steel lintels (RSJs) to support the ceiling load. This requires building control approval and adds significantly to the cost.

Typical Bifold Door Cost Breakdown (Supply & Fit)

Below is a realistic guide to typical turnkey prices in London for a standard 3-panel, 4-panel, and 5-panel bifold system, finished in a standard color (like White or Anthracite Grey) with double glazing:

Note: Prices include the doorset, tracking hardware, locks, weather gaskets, A-rated double-glazed glass units, professional installation, and disposal of rubbish. Structural steelwork is not included.

Aluminium vs. uPVC Bifold Doors

While uPVC bifold doors are less expensive upfront, aluminium is highly recommended for bifold installations for several structural reasons:

• Thermal Expansion: Bifold doors span wide structural openings. uPVC expands and contracts significantly when exposed to direct sunlight, which can cause the panels to stick or sag, requiring regular adjustments. Aluminium is structurally stable and does not expand significantly.
• Sleek Profiles: Aluminium frames are much thinner than uPVC, maximizing your view and the natural light entering your room when the doors are closed.
• Track Lifespan: Aluminium track systems are stronger, allowing the heavy weight of the glass panels to glide smoothly with minimal friction.

The Labour-Only Option: Installation Only

If you prefer to buy your bifold doors independently (for example, from a direct-to-consumer online trade store), you can hire our team for the installation labour only. A standard 3-panel aluminium bifold installation typically requires two fitters for a full day. Our labour-only rates for bifold door fitting average £500 to £850 depending on the complexity of the opening, access, and weight.

About the Author: Marian Gheorghe

Head Window Fitter & Active Director, Window Fitters Ltd

Marian Gheorghe is the Head Window Fitter and Director of Window Fitters Ltd. He has spent over 15 years installing premium aluminium and uPVC sliding and bifold door systems across London, ensuring perfect alignments and weatherproofing.

Connect on LinkedIn → Expert Reviewed: July 2026

Bifold Door Cost FAQs

Do new bifold doors require building regulations sign-off?

Yes. If you are replacing existing patio doors with bifold doors, the installation must comply with Document L (insulation, U-value of 1.4 or lower) and Document K (safety glass). If you are creating a new opening, it will also require structural lintel inspections and certification.

How long do bifold doors take to manufacture?

Standard color aluminium bifold doors (like White, Black, or Anthracite Grey) typically take 3 to 4 weeks to manufacture. Custom RAL colors can take 6 to 8 weeks.

Are bifold doors secure?

Yes. All bifold systems we supply feature multi-point locking systems, shoot-bolt locks on intermediate panels, drop-bolts, anti-lift tracks, and internally glazed toughened safety glass, meeting PAS 24 security standards.