Aluminium bifold doors
Aluminium is often used for bifolds because it suits larger glass panels, slimmer frames and modern finishes.
Bifold doors cost calculator
Bifold Doors Cost Calculator UK
Estimate the cost of bifold doors based on opening width, panel count, frame material, glazing, threshold, traffic door, structural preparation and region. Use the folding preview to compare panel counts and see how width changes the cost.
Bifold doors or patio doors?
Bifold doors are designed to fold back in panels. Patio doors usually slide or swing within the opening. The better option depends on the opening width, budget, sightlines and how much of the wall you want to open.
| Situation | Better starting point | Reason |
|---|---|---|
| Want the widest clear opening | Bifold doors | The panels fold back to open more of the wall. |
| Want fewer frame lines when closed | Patio doors | Sliding patio doors can give larger glass panels and fewer vertical lines. |
| Smaller opening | Patio doors | A simpler patio door system may be more cost-effective. |
| Large opening with daily access | Bifolds with traffic door | A traffic door allows normal access without folding the full set. |
| Lower budget | Patio doors | Patio doors often use fewer panels and simpler tracks. |
Bifold panel count guide
Panel count affects cost, sightlines, stacking space and daily use. Wider openings usually need more panels, but too many panels can increase hardware, adjustment and frame complexity.
| Opening width | Likely panel count | Planning note |
|---|---|---|
| 1.8m–2.4m | 2 panels | Useful for smaller openings where a compact folding setup is needed. |
| 3.0m | 3 panels | A common middle point where traffic-door layout should be considered. |
| 3.6m–4.2m | 4 panels | Often a practical balance between panel width, cost and usability. |
| 4.8m | 5 panels | Panel stacking and folding direction become more important. |
| 5.4m–6.0m | 6 panels | Structural preparation, threshold design and frame quality can drive the budget. |
Bifold material comparison
Frame material affects price, appearance, panel strength, sightlines and suitability for wider openings.
uPVC bifold doors
uPVC can reduce cost, but the frames may look bulkier and may be less suited to very wide openings.
Timber bifold doors
Timber can suit traditional homes and warmer visual styles, but usually costs more and needs more maintenance.
Composite bifold doors
Composite systems can sit in a higher cost range where mixed materials, finish and performance are part of the specification.
Typical UK bifold doors cost ranges
These are broad planning ranges. Use the calculator above for a more specific estimate based on opening width, panel count, material, threshold, glazing and structural preparation.
| Project type | Typical range | Best next calculator |
|---|---|---|
| 2-panel bifold doors | £2,000–£5,000+ | Bifold Doors |
| 3-panel bifold doors | £3,000–£7,000+ | Bifold Doors |
| 4-panel bifold doors | £4,000–£10,000+ | Bifold Doors |
| 5-panel bifold doors | £5,500–£13,000+ | Bifold Doors |
| 6-panel bifold doors | £7,000–£16,000+ | Bifold Doors |
| Bifolds with structural work | £8,000–£25,000+ | Structural scope |
What affects bifold doors cost?
Bifold door cost is mainly driven by opening width and panel count, but the frame system, glazing, threshold, traffic door and structural preparation can change the total budget quickly.
Opening width
Wider openings increase cost because the frame, track and glass units are larger. Handling and fitting also become more demanding.
Panel count
More panels add hinges, rollers, handles, seals and installation adjustment. Panel count also affects stacking space and sightlines.
Frame material
Aluminium, timber, uPVC and composite systems sit in different cost bands because strength, finish and frame design vary.
Threshold system
Flush and weather-rated thresholds can cost more because drainage, weather sealing and floor levels need careful planning.
Glazing
Triple, acoustic or solar control glass can increase cost because the units are heavier, higher specification or more specialist.
Structural preparation
Creating or widening an opening can add lintel or RSJ work, brickwork changes, making good and threshold preparation.
Panel width matters more than people think
Panel count is not only a pricing choice. Too few panels can make each panel heavy and wide. Too many panels can add frame lines, hardware and adjustment work. The best layout balances panel weight, stacking space, daily access and the view when the doors are closed.
A traffic door can be useful if the bifolds are used every day. It lets one panel work like a normal door, but it can affect the panel layout and folding direction.
Threshold and weather details
Threshold choice affects both cost and performance. A standard threshold is usually simpler. Low or flush thresholds can improve access and appearance, but they need careful drainage, weather sealing and floor level planning.
A weather-rated flush threshold can be a better fit where external exposure matters, but it may increase the cost because the installation detail is more demanding.
Structural work can change the budget
A bifold door quote may or may not include removing existing doors, widening an opening, installing a lintel or RSJ, making good brickwork, plastering, drainage detail or threshold preparation. If the wall opening is changing, include structural preparation in the calculator rather than pricing the door unit alone.
Planning a wider windows and doors upgrade?
If bifolds are part of a wider project, compare this estimate with the Window Replacement Cost Calculator. If glass performance is the main focus, use the Double Glazing Cost Calculator. For entrance replacement, use the Front Door Cost Calculator.
How this bifold doors estimate is calculated
The calculator uses opening width and a base cost per metre by frame material. It then adjusts the range using panel count, system quality, glazing, threshold type, traffic door, folding direction, replacement scope, structural preparation, access, region and contingency.
This estimate is designed for early planning. A fixed quote needs accurate opening measurements, structural checks, threshold details, panel layout, hardware specification and access review.
For more detail, read our methodology, pricing data and how costs are calculated.
Bifold doors decision paths
Use these paths to choose the setup that matches your project.
I want the widest opening possible
Use the opening width slider and compare panel counts. Wider openings usually increase the need for stronger frames, better tracks and more installation planning.
I want fewer frames when closed
Compare this estimate with the Patio Doors Cost Calculator. Sliding patio doors may give larger glass panels and fewer vertical lines.
I need everyday access
Add a traffic door. It can make daily use easier because one panel works like a normal door.
I am changing the wall opening
Include structural preparation in the calculator. Widening or creating an opening can change the budget as much as the door system.
Bifold doors cost FAQs
How much do bifold doors cost in the UK?
Bifold doors can range from a few thousand pounds for a smaller setup to well over £10,000 for larger aluminium systems, premium thresholds, upgraded glazing or structural work.
How much do 3-panel bifold doors cost?
A 3-panel bifold system often sits in the middle of the range. Material, glazing, threshold and whether the opening is already prepared all affect the final cost.
Are aluminium bifold doors more expensive than uPVC?
Usually, yes. Aluminium often costs more because it suits slimmer frames, larger panels and higher-specification systems.
Are bifold doors more expensive than patio doors?
Often, yes. Bifolds use multiple folding panels, hinges, rollers, tracks and more adjustment work than many patio door systems.
Do bifold doors need structural work?
They may if the opening is being widened or newly created. Structural preparation can include lintel or RSJ work, brickwork changes and making good.
What is a traffic door?
A traffic door is one bifold panel that opens like a normal door, so you can use the entrance without folding back the full system.
Does a flush threshold cost more?
It can. Flush thresholds need careful weather sealing, drainage and floor level planning, especially where the opening is exposed.
Are CostIntel estimates fixed quotes?
No. They are planning estimates based on typical UK bifold door cost drivers. An installer needs to measure the opening and inspect the structure before giving a fixed quote.