Door comparison · 2026
Bifold Doors vs Sliding Doors Cost
Bifold and sliding patio doors can fill a similar opening, but they are priced very differently. Sliding systems use fewer moving panels and simpler hardware; aluminium bifolds need multiple hinged panels, tracks and more complex adjustment.
Quick price answer: Our model puts a medium uPVC sliding patio replacement at £1,130–£2,054, versus £2,723–£4,841 for a medium three-panel aluminium bifold. A four-panel bifold rises to roughly £3,444–£5,387.
Like-for-like fitted examples
These assume an existing suitable opening and UK-average pricing.
Figures are modelled UK-average fitted-market estimates from the Window Price Calculator engine, using its 24 September 2026 research refresh. They include ordinary removal, standard fitting, basic making good and VAT; scaffolding, hidden structural repairs and highly bespoke work can sit outside the range.
What do you get for the extra bifold spend?
The price difference buys a different opening behaviour rather than simply a more expensive version of the same door.
| Factor | Sliding patio | Bifold |
|---|---|---|
| Opening | One panel slides behind another | Multiple panels fold to one or both sides |
| Typical fitted cost | £1,130–£2,054 | £2,723–£4,841 for 3 panels |
| Frame sightlines | Larger individual panes | More vertical frames between panels |
| Complexity | Lower | Higher due to tracks, hinges and panel adjustment |
Which is better value?
The answer depends on how you use the room and how much of the opening you want to clear.
Choose sliding when
You want large uninterrupted panes, a simpler mechanism and the lower fitted cost. Sliding doors are often the value choice for a wide glazed opening.
Choose bifold when
You value opening most of the aperture on good-weather days and are comfortable paying more for the multi-panel aluminium system.
Use your own project
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Rough sizes are fine. The full personalised result is unlocked after the £2.99 checkout.Related price guides
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Questions people ask
Are bifold doors more expensive than sliding doors?
Usually yes in like-for-like replacement work. In our current model, a medium three-panel bifold centres around £3,782, compared with about £1,592 for a medium uPVC sliding patio door.
Do bigger bifolds rise quickly in price?
Yes. Our four-panel example is £3,444–£5,387 and the five-panel example is £4,209–£6,583, before unusual structural work.
Is the opening work included?
The examples assume like-for-like replacement. Enlarging or creating the opening can add substantial structural cost.
Compare the two options using your opening size.
Start with the door style you prefer, then edit the product in the calculator to compare a second option on the same project.
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