Aluminium bifold doors are the dream for a lot of extensions and kitchen-diners: slim frames, big glass, and a wall that folds right back on a summer day. But they are not cheap, and if you have been hunting for cheap aluminium bifold doors you will have seen prices that swing wildly. This guide explains what drives the cost, why aluminium sits above uPVC, and how to get genuine value without buying trouble.
Bifold prices are usually quoted by the number of panes and the overall width. As a broad 2026 guide, supplied and fitted:
These figures are for the doors fitted into a ready opening. If building work is needed to form or widen the opening, that is on top. Colour, glass spec and hardware all move the number too.
It is a fair question, so here is the honest answer.
Aluminium is strong for its weight, so the frames can be much slimmer than uPVC while still carrying big, heavy panes. That means more glass and a cleaner look, which is exactly why people choose it. You pay for that strength and slimness.
Aluminium itself costs more than uPVC, and the powder-coated finish is baked on to last for decades without fading or flaking. That finish is part of why aluminium keeps looking smart far longer.
A bifold lives or dies by its rollers, tracks and hinges, because those parts do all the work every time you fold it back. Good aluminium systems use quality running gear rated for years of use. Cheaper doors cut costs here, and it shows.
You can see the slim-framed look in our aluminium sliding and bifold door range, which is where these prices come to life.
Sometimes, but you have to know what you are looking at. A low price can mean a few different things:
A cheaper aluminium bifold from a proper supplier with a real guarantee can be sensible value. The cheapest listing from an unknown source, fitted by whoever is going, is where people get stung. Judge the spec, not just the headline price.
If your heart is set on aluminium, the value is in the parts you cannot see. Pay for good running gear and decent glass, because those are what you feel every day and what fails first on a cheap door. Frame colour and handle style are worth getting right too, since aluminium holds its finish for so long that you will live with the choice for years.
If aluminium stretches the budget too far, a uPVC bifold or a set of French doors gives you much of the benefit for less. Our wider aluminium window range can also help you match a bifold to the rest of the house.
Widths, pane counts and specs vary so much that only a measured quote tells you your real figure. When you compare quotes, check they are like for like: same number of panes, same glass, same colour inside and out, and fitting included. Request a free quote and we will price your opening properly, with the spec written down.
As a rough 2026 guide, a three-pane aluminium bifold costs around 3,500 to 6,000 pounds supplied and fitted, a four-pane around 4,500 to 7,500 pounds, and larger sets more. Building work to form the opening is extra. Get a quote for a firm figure.
Aluminium is stronger, so it carries bigger glass on slimmer frames, and its powder-coated finish lasts for decades. The material, the finish and the quality running gear all cost more than uPVC, which is why the price sits higher.
They can be, from a reputable supplier with a guarantee. Be wary of very low prices that hide thinner frames, budget rollers or basic glass. On a door you fold daily, the running gear matters most, so do not cut corners there.
It depends on the width and how you want the doors to fold. As a rough rule, each pane is around 0.8 to 1 metre wide. A surveyor will work out the best configuration for your opening and where you want the doors to stack.
Modern aluminium bifolds use thermally broken frames and energy-efficient glass, so a good one insulates well. Cheaper doors with basic glass and no thermal break lose more heat, which is another reason spec matters more than price alone.
Want to see the colours, configurations and glazing options? Download our latest brochure, or request a free quote and we will pop out to measure up.