Bi-fold doors remain one of the most popular home improvements in the UK, especially for rear extensions, kitchen-diners and garden-facing rooms. They promise more light, wider openings and a modern look — but they also come with a reputation for being expensive.
So how much do bi-fold doors actually cost in the UK in 2026? And what factors push prices up or down?
In this guide, we break down average UK bi-fold door prices, explain what affects the final cost, and help you decide whether they’re worth the investment for your home.
Average Cost of Bi-Fold Doors in the UK (2026)
As of 2026, the typical cost of bi-fold doors in the UK (supply and installation) ranges from:
£2,500 – £4,000 for smaller uPVC systems
£4,000 – £7,000 for standard aluminium bi-fold doors
£8,000 – £10,000+ for large or premium aluminium systems
Prices vary widely depending on size, material, glazing and installation complexity.
Bi-Fold Door Cost by Material
| Material | Typical UK Price (Installed) | Key Notes |
|---|---|---|
| uPVC | £2,500 – £4,000 | Cheapest option, thicker frames |
| Aluminium | £4,000 – £7,000 | Most popular, slim frames |
| Timber | £6,000 – £9,000 | Premium look, higher maintenance |
| Composite | £7,000 – £10,000+ | High-end, limited suppliers |
What Affects the Cost of Bi-Fold Doors in the UK?
1. Size of the Opening
The width and height of your opening is one of the biggest cost drivers.
Small openings (2–3 panels): cheaper
Large openings (4–6+ panels): significantly more expensive
Taller doors (over 2.1m): increase glass and frame costs
As a rough guide, prices often increase per panel, not just per metre.
2. Number of Panels
More panels mean:
More glass
More frames
More hardware
More installation time
A 3-panel bi-fold door will always be cheaper than a 5- or 6-panel system, even if the overall width is similar.
3. Door Material
uPVC Bi-Fold Doors
Cheapest upfront
Thicker frames reduce glass area
Less durable long term
Often chosen for budget projects
Aluminium Bi-Fold Doors
Most popular in the UK
Slim frames = more light
Strong, durable and weather-resistant
Higher upfront cost but better longevity
Timber Bi-Fold Doors
Traditional or period homes
Natural appearance
Require ongoing maintenance
Usually the most expensive option
4. Glazing Type
Most UK bi-fold doors are double glazed, but options include:
Triple glazing (better insulation, higher cost)
Solar control glass (reduces overheating)
Acoustic glass (for noisy locations)
Laminated safety glass
Upgraded glazing can add £500–£2,000+ to the total price.
5. Installation Costs
Installation costs vary depending on:
Structural changes required
Steel beams or lintels
Brickwork alterations
Access to the property
Location in the UK
Typical installation costs range from £800 to £2,000, but complex projects can exceed this.
6. Structural Work
If your project involves:
Removing load-bearing walls
Installing steel beams
Enlarging existing openings
These costs are not included in most door quotes and can add £1,500 – £4,000+ to your project.
7. Threshold Options
Threshold choice affects both price and performance:
Standard threshold: cheapest
Low threshold: extra machining and drainage
Flush or level access threshold: higher cost, ideal for accessibility
Expect to pay more for wheelchair-friendly or Part M compliant options.
8. Colour and Finish
Standard colours (white, black, anthracite grey) are usually included.
Custom options such as:
Dual colour (inside/outside)
Textured finishes
Woodgrain effects
Can add £300–£1,000+ to the total price.
9. Brand and System Quality
Premium bi-fold door systems cost more but usually offer:
Better thermal performance
Smoother operation
Longer warranties
Better weather sealing
Cheaper systems may save money upfront but cost more long-term due to maintenance or replacement.
Bi-Fold Doors vs Sliding Doors: Cost Comparison
Many homeowners now compare bi-fold doors with sliding patio doors.
| Feature | Bi-Fold Doors | Sliding Doors |
|---|---|---|
| Average Cost | £4,000–£8,000 | £5,000–£9,000 |
| Opening Width | Full | Partial |
| Frames | Multiple | Minimal |
| Views | Broken up | Clearer |
| Energy Efficiency | Good | Often better |
Sliding doors can be more expensive initially but often provide better year-round performance.
Hidden Costs to Watch Out For
When budgeting, remember to factor in:
Electrical work
Flooring adjustments
Plastering and decorating
Planning or building control fees
VAT (some quotes exclude it)
Always ask for fully itemised quotes.
Are Bi-Fold Doors Worth the Cost in the UK?
Bi-fold doors are worth the investment if:
You entertain regularly
You want maximum opening width
You’re building a modern extension
You invest in quality materials and installation
They may not be worth it if:
Budget is tight
You prioritise winter efficiency
You want uninterrupted views year-round
You need internal wall space
How to Get the Best Price on Bi-Fold Doors
Get at least three quotes
Compare systems, not just prices
Ask about warranties and aftercare
Avoid choosing solely on lowest cost
Use experienced UK installers
Final Thoughts
So, how much do bi-fold doors cost in the UK in 2026?
For most homeowners, expect to pay £4,000–£7,000 for a good-quality aluminium bi-fold door system, with higher prices for larger or more complex installations.
The final cost depends on size, material, glazing, installation and structural work, so professional advice is essential before committing.
Choosing the right doors isn’t just about price — it’s about long-term performance, comfort and how you actually use your space.
Image provided by https://unsplash.com/@mbormc
