Working out how much bifold doors actually cost in 2026 is harder than it should be. Most suppliers won't give you a price until they've taken your details, and the figures that do appear online are often either entry-level teasers or premium-bracket headlines that don't reflect what most buyers end up paying.
This guide pulls together honest, realistic UK pricing — what aluminium and uPVC bifolds typically cost in 2026, what drives the price up or down, and how to budget for the extras that often get left out of the headline number. It's written from a manufacturer's perspective, so the numbers reflect real production costs and real retail margins, not marketing fluff.
The short answer
In 2026, aluminium bifold doors in the UK typically cost between £2,000 and £6,500 for the doors alone, depending on size, configuration, and finish. uPVC bifolds usually fall between £1,500 and £4,000 for the same size range. Installation, where needed, adds £500–£1,500 to either option.
Most three-metre bifold installations — the most common size for a kitchen extension or rear elevation — end up in the £3,000–£5,500 range supply-only, or £4,500–£7,500 including installation.
Size | Aluminium (supply only, ex VAT) | uPVC (supply only, ex VAT) |
|---|---|---|
2.1m × 2.1m (3-door) | £1,900 – £3,200 | £1,500 – £2,400 |
3m × 2.1m (3-door) | £2,200 – £4,500 | £1,800 – £3,000 |
3.6m × 2.1m (4-door) | £2,700 – £5,200 | £2,200 – £3,400 |
4m × 2.1m (4-door) | £2,850 – £5,800 | £2,400 – £3,700 |
4.8m × 2.1m (5-door) | £3,400 – £6,500 | £2,800 – £4,000 |
6m × 2.1m (6-door) | £4,150 – £8,500 | Not commonly available |
What actually drives the price?
Two bifolds that look almost identical in a brochure can have a £3,000 price gap between them. Here's where that money goes.
1. Material: aluminium vs uPVC
The single biggest variable. Aluminium bifolds typically cost 30–50% more than the equivalent uPVC unit because the raw material is more expensive, the manufacturing process is more involved, and the frame can be made thinner — which means more glass per door and more design appeal. uPVC is the budget-friendly choice; aluminium is the long-term, slim-frame, premium choice. Most extensions in 2026 are specified in aluminium.
2. Size and number of doors
Wider openings need more doors and more material, which both raise the price. A 4-metre opening typically needs four door panels; six metres needs six. Each additional door adds roughly £400–£800 to the supply price depending on material and spec. Going beyond six metres — or much over 2.4 metres tall — typically pushes you into bespoke pricing territory, which can add 15–25% on top of the standard rate.
3. Glass spec
Standard double glazing with a low-E coating is included in almost every quote. Where the price climbs is with triple glazing (add ~15–25%), acoustic glass (add ~20%), tinted or self-cleaning glass (add ~10–15%), and anti-sun coatings for south-facing installations (add ~10–20%). For most domestic installations in the UK, standard double glazing is more than adequate; triple glazing only really pays off in very exposed or very cold locations.
4. Colour and finish
Most aluminium bifold suppliers offer a range of standard powder-coat colours at no extra cost — Anthracite Grey, Black, White, Agate Grey are usually included. Custom RAL colours (matched to a paint code) typically add £150–£400 per door set. Dual-colour finishes — a different colour outside vs inside — are now offered as standard by many manufacturers but still cost extra with some legacy suppliers. uPVC has a more limited range; expect woodgrain effect finishes to cost 5–10% more than plain white.
5. Hardware and security extras
Standard handles in black, chrome, or white are usually included. Premium finishes (brushed brass, polished gold) add £50–£200. Multi-point locking is now standard on PAS 24 compliant doors. Upgrading the security cylinder from 1-star to 3-star adds £40–£80. Built-in blinds — popular for kitchen-facing bifolds where curtains aren't practical — add £200–£500 per door.
6. Threshold and frame style
A standard threshold sits on top of your existing cill. A low or 'zero' threshold (where the door track is flush with the floor) is a common upgrade for modern extensions, particularly where wheelchair access matters; expect to pay an extra £100–£300. Slim-line frames — where the visible aluminium is 50–60mm rather than the standard 100–120mm — typically command a 15–25% premium because they require higher-spec engineering.
Installation, VAT, and the costs nobody warns you about
Installation
Most UK installers charge between £500 and £1,500 to fit a bifold door, depending on opening size, access, and the state of the existing structure. A clean swap (replacing existing patio doors or French doors) is at the lower end; a fresh installation into an opening that needs structural work — lintels, jambs, render, or any masonry alterations — runs higher and may involve a structural engineer.
VAT
Almost every supplier quotes ex VAT. Add 20% to your supply quote to get the actual amount you'll pay. On a £4,000 bifold that's another £800 — easily overlooked when comparing quotes.
Structural work
If you're enlarging an existing opening or putting a bifold into a new extension, you may need a structural engineer (£300–£800), Building Regulations approval (£200–£400 depending on local authority), and possibly steelwork (£500–£2,500). These are extension costs rather than bifold costs strictly, but they're worth knowing about if you're comparing fitting a bifold into an existing patio opening vs going for a more ambitious project.
Finishing
Plastering, tiling, painting, and external rendering around a new bifold opening typically add £400–£1,200. Make sure your builder includes this in the quote, not just the installation of the door itself.
How to save money without ending up with a bad bifold
There's a difference between saving money and buying a worse product. The tips below are about getting the same bifold for less, not stepping down a tier.
Buy direct from a UK manufacturer
Retailers and showroom businesses typically add 30–50% on top of the manufacturer's wholesale price. If you can buy direct from the factory, the same product — same frame, same glass, same hardware — costs significantly less. This is a relatively recent shift in the UK market; a decade ago, direct-from-manufacturer wasn't really an option for domestic buyers.
Stick to standard sizes where possible
Most manufacturers offer a set of standard sizes (2.1m, 2.4m, 2.7m, 3m, and so on, all at 2.1m tall) that are produced in batches and priced more competitively. Going bespoke — even by 50mm — usually triggers a 15–25% surcharge and a longer lead time. If your opening is close to a standard size, ask your builder whether the brickwork can be adjusted to match. It often can.
Don't pay for features you won't use
Triple glazing, acoustic glass, integrated blinds, and exotic colour finishes all sound appealing in the brochure. They're all worth having if you actually need them. But on a typical south-facing kitchen extension, standard double glazing in a popular colour does the job at a fraction of the cost.
Splurge where it shows
If you're trimming costs, do it on the things that don't affect daily use — skip the premium handle finish, stick with double glazing. Don't economise on the things you'll see and touch every day: frame quality, smoothness of the folding mechanism, weatherproofing. A bifold that sticks or whistles in the wind ages badly.
Are bifolds worth the money?
In most cases, yes — but it depends what you're replacing and what you're trying to achieve. If you're opening up a rear extension and want the wow factor of fully opening up the back of the house in summer, bifolds deliver something patio doors and French doors simply can't. If you mainly want a large glass surface that looks good when closed and rarely actually opens, sliding doors may be the better choice and often cost less.
Most kitchen extensions in 2026 are still going with bifolds because they're flexible, on-trend, and add tangible value if you ever sell. Surveys and estate agents consistently flag aluminium bifold doors as one of the higher-ROI home improvements you can make.
Quick FAQ
How much do bifold doors cost installed?
In 2026, a typical 3-metre installed aluminium bifold costs between £4,500 and £7,500 in total — that's the doors, VAT, installation, and basic finishing. uPVC equivalents come in at around £3,500–£5,000 installed.
Do bifold doors add value to your home?
They generally do, particularly on rear extensions and kitchens, where the visual impact is highest. Estate agents typically cite aluminium bifolds as a positive feature on listings, especially in properties where they open onto a usable garden or patio.
How much should I budget for a 3-metre bifold?
£4,000–£6,000 all-in is a sensible budget for a mid-range aluminium 3-metre bifold installed in 2026, including VAT and basic fitting. Premium suppliers and bespoke specifications can push this above £8,000.
Are uPVC bifolds significantly cheaper?
Yes — typically 30–40% cheaper than the aluminium equivalent for the same size and configuration. They're a valid choice for tighter budgets but come with thicker sightlines, fewer colour options, and less span capability.
Why are some bifolds so much more expensive than others?
The main drivers are brand, frame profile (slim or standard), glass spec, colour, and where you buy. A premium-branded slim-frame aluminium bifold in a bespoke colour from a high-street retailer can easily cost double a direct-from-manufacturer standard-size unit with the same performance specs.
Is it worth getting quotes from multiple suppliers?
Always. Quotes for the same opening can vary by £2,000–£4,000 between suppliers, and the most expensive isn't always the best. Compare like-for-like specifications — same size, same colour, same glazing — not just the headline number.
Get your own price in two minutes
If you'd like a concrete price for your specific opening rather than a range, our online configurator gives you a full quote in under two minutes — pick your size, colour, threshold, and handle, and the price updates live. Every door is manufactured at our Derbyshire factory and comes with a 10-year guarantee.