What do bifold doors cost?
Price your bifolds, and see the rest on your own house
Bifolds open onto the garden, so we price them from the same rate card and do not draw them onto a photograph of your front. Upload a photo of the front and design your windows, front door, walls, roofline and roof on your actual house.
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By door type
| Door | Estimated cost fitted, inc VAT |
|---|---|
| Bifold, up to 2.4 m (3 panels) | £3,029 – £5,507 |
| Bifold, 3 m (wider fold) | £3,768 – £6,851 |
| Sliding patio door | £1,601 – £2,910 |
| French / double doors | £2,050 – £3,728 |
Why a bifold costs what it does
Width is most of it. A 3 m opening is not a 2.4 m opening with a bit more glass — it is another panel, more track, heavier leaves and usually a structural lintel above it. That is why the step from £3,029 to £3,768 is steeper than the extra 600 mm suggests.
The rest is the opening itself. Bifolds usually replace a window or a single back door, so somebody has to make the hole bigger, and that is building work rather than glazing. If your opening is already the right size the figures above are the job; if it is not, add the builder.
A sliding patio door runs about £1,601 to £2,910 and French doors about £2,050 to £3,728, and both are markedly cheaper than a bifold because there is less hardware and less glass carrying its own weight.
We will price these, and we will not pretend to show them
Facet Pro works from one photograph of the front of your house — that is where the front door is, and a UK front door is 1.98 m, which is what gives every measurement on this site its scale.
Bifolds and patio doors open onto the garden. They are not on that elevation, so we price them from the same rate card as everything else and we do not draw them onto the picture. A visualiser that put your bifolds on the front of your house would be showing you a building you do not own.
So: upload your front, design your windows, front door, walls, roofline and roof and see those on your own house — and add the bifolds to the estimate and to what your installer quotes.
What is included in these prices
Supplying and fitting the door and frame, taking the old door away (£42 of the figure), standard hardware, and sealing around the frame. VAT is in every figure.
Not included: widening or re-forming the opening, a new step or threshold in stone, and internal decorating.
Planning estimate or quotation?
Every figure on this page is a planning estimate: what a job like this typically costs, for budgeting and for judging the quotes you get. It is not a quotation. A quotation comes from an installer after a survey, when the exact sizes, specification and condition of your house are known.
Facet Pro narrows the estimate to your own house from a photograph of the front — the windows it can see, the wall it can measure against your front door — and says which parts are measured and which are estimated for your house type. Your installer confirms the figure on survey.
Common questions
What do bifold doors cost?
A three-panel bifold up to 2.4 m runs about £3,029 to £5,507 fitted, and a 3 m opening about £3,768 to £6,851. A sliding patio door is roughly £1,601 to £2,910. Those are supply and fit including VAT, from what these jobs settle at rather than a list price.
Facet Pro is in early access. We are starting to check how we measure wall area from a photograph against surveyed properties, so treat wall and roof figures as indicative and window figures as a guide.
Your house isn’t average.
See this project on your own home and get a planning estimate. Any figure on this page is for a typical house. Start with one photograph of the front and we will find your windows, doors, roof and walls, estimate your wall area, and price your own elevation.
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Free to try · No measurements · No sales call unless you ask
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These are planning estimates — not a quotation, and not a survey. Windows and doors: what these jobs typically sell for, from 25 years in the home improvement industry, checked against current UK prices. Render, roof and roofline: UK material and labour rates, with scaffolding, waste and VAT. What you pay depends on your own house and, more than anything else, on which company quotes it. Your installer confirms the figure on survey. Prices checked October 2026.