Door comparison · 2026
Bifold Doors vs French Doors Cost
French doors and bifolds solve different design problems. French doors are a two-leaf opening with relatively simple hardware; bifolds use multiple aluminium panels to open a much larger proportion of a wide aperture.
Quick price answer: A medium uPVC French-door replacement is £1,267–£2,157 in our model. A medium three-panel aluminium bifold is £2,723–£4,841, with four-panel systems around £3,444–£5,387.
Fitted cost comparison
Like-for-like replacement examples with an existing suitable opening.
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.
French doors or bifolds?
The lower-cost option is clear, but the way each opening works is different.
| Factor | French doors | Bifold doors |
|---|---|---|
| Typical fitted price | £1,267–£2,157 | £2,723–£4,841 for 3 panels |
| Opening style | Two hinged leaves | Several folding panels |
| Best for | Traditional or moderate-width openings | Wide openings and maximum clear aperture |
| Hardware complexity | Moderate | High |
Do not compare a small French opening with a huge bifold opening
Width is often the hidden reason quotations look dramatically different.
Existing opening
If both products fit the same existing opening, the comparison above is useful.
New wide opening
If the bifold quote also includes knocking through a wall or adding structural steel, that extra building work should be separated from the door-system comparison.
Use your own project
Start a replacement estimate.
Use the calculator to price a complete replacement window or door. Choose the closest product and project size and we’ll carry those choices into the full calculator.
Rough sizes are fine. The full personalised result is unlocked after the £2.99 checkout.Related price guides
Use the closest related guide to compare another specification or project type.
Questions people ask
Are bifold doors more expensive than French doors?
Yes in our like-for-like examples. The centre is around £3,782 for a medium three-panel bifold versus £1,712 for medium French doors.
Which is cheaper to install?
French doors are normally the simpler, lower-cost system when both are fitted into an existing suitable opening.
Do bifolds add structural costs?
Not automatically, but wide bifolds are often installed as part of an enlarged opening. Structural work is a separate cost and can be substantial.
Price the opening, not just the door style.
Use your approximate width and preferred product to compare a realistic fitted project.
Start my estimate · £2.99