Bifold Doors Cost Explained

Bifold doors can open almost a whole wall to the garden, so they are one of the bigger glazing purchases for a home. Quotes for what seems like the same set can differ widely, and that is because the cost of bifold doors depends on many choices, some of which are not obvious at first. This guide explains the main factors so you can compare quotes fairly. We do not list figures, because the right price depends on your opening.

Width and number of panels

The overall width of the opening and how many panels the set is divided into are the biggest drivers. More panels mean more hinges, carriers, locks and glass. Fewer, wider panels give slimmer sightlines but each panel is heavier and needs stronger running gear. Height matters too, as tall panels need sturdier frames.

Aluminium bifold doors cost versus uPVC

Aluminium bifold doors usually cost more than uPVC because of the material and the engineering of the profile, but they allow slimmer frames, larger panels and a wide range of colours. uPVC bifolds are generally more economical and suit smaller openings well. Timber and composite options also exist at different price points.

Glass, colour and hardware

Glass specification affects price: solar control coatings for south-facing rooms, acoustic or laminated glass and integral blinds all add cost. Dual colour frames, with one colour outside and another inside, and premium handles also add to it. A traffic door, a single panel that opens like a normal door for everyday use, is very handy and is usually included in the design.

Thresholds and the opening itself

A low or flush threshold for a level step between inside and out is popular, but it may need extra work on drainage and the floor. If the opening is being widened, for example replacing a window and wall with bifolds, a new lintel and building work are needed, often with Building Regulations approval. Removing old doors, making good the plaster and finishing the reveals also affect the overall cost.

Cheap bifold doors external: what to check

Cheap bifold doors external sets can be tempting, especially online, but check the running gear, the lock on the lead door, the glass specification and who will fit them. Bifolds rely on precise alignment, and a poorly made or badly fitted set can sag, stick and leak. Our bifold door repairs page shows the faults that follow. Value comes from a well-engineered set fitted square and level.

Comparing quotes

When comparing quotes, check the number of panels, the configuration, the threshold type, glass specification, colour, hardware, removal of the old door and making good. That way you are comparing like for like rather than just a total.

Configuration and how the panels fold

Bifolds can stack to one side, split to both sides, fold inwards or outwards, and include a traffic door at either end. Each configuration changes the hardware needed. Outward folding is common in the UK because it keeps panels out of the room, but it needs space on the patio. Deciding how the doors will be used day to day helps settle the layout and avoids paying for features you will not use.

Installation time and access

Bifolds are heavy and must be fitted square, level and plumb. Access to the opening, whether scaffolding is needed for the lintel, and how much making good is required all affect the time on site and therefore the overall cost.

Questions to ask before you commit

Ask which system the doors use, how the panels are adjusted if they settle, which way the doors fold, what threshold is included and how the opening will be finished inside and out. Clear written answers make it far easier to compare one quote with another.

Need it sorted?

Book bifold doors through our bifold doors page, and send the opening width, a photo and how you would like the panels to fold through the quote form.