Search "bifold doors cost" and you'll get everything from interior closet hardware to exterior glass wall systems. Those are different product categories sharing a name, so the opening size and intended use need to come first.
European aluminum bifold patio doors cost about $5,200 to $7,500 supplied for a 9 ft wide opening and $8,800 to $12,800 for a 20 ft one (8 ft tall, double glazed) - roughly $55 to $105 per square foot - before freight, duty and installation.
This guide is about the exterior kind: large-panel aluminum bifold systems that fold an entire wall of glass out of the way. If you're looking for interior closet bifolds, stop here - that's a hardware-store purchase. If you want panoramic outdoor openings in aluminum with real thermal performance, read on.
Bifold door prices by number of panels
| Panels (opening width) | Supplied, 8 ft tall, double glazed |
|---|---|
| 3 leaves (9 ft) | $5,200 - $7,500 |
| 4 leaves (12 ft) | $6,300 - $9,100 |
| 5-6 leaves (16 ft) | $7,600 - $11,000 |
| 6-8 leaves (20 ft) | $8,800 - $12,800 |
These are supplied prices for European aluminium bifold doors (UK and US spellings, same product) before freight, duty and installation. The size table below adds the area and per-square-foot figures, and the final panel count depends on the system you pick.
The two categories - and why they get lumped together
Interior bifold doors (closets, pantries, laundry rooms): lightweight interior panels, often available off the shelf. They are a separate product category from the weather-rated exterior systems priced here.
Exterior bifold door systems (patio, poolside, outdoor living): multi-panel thermally broken aluminum or uPVC, floor-to-ceiling glass, purpose-built to handle weather, wind loads, and thermal performance requirements. Completely different product class. Pricing starts around $5,000 for small configurations and scales up from there.
Everything below applies to exterior systems only.
"Accordion glass doors" - same product, different name
If you searched "accordion glass doors cost" instead of "bifold doors cost," you're looking at the exact same product. Accordion, folding, and bifold all describe the same fold-flat panel mechanism - the naming split is mostly regional and trade-driven. Everything on this page - pricing, panel counts, hardware - applies whichever term you use.
How much do panoramic folding patio doors cost?
Folding patio doors cost about $5,200-$7,500 supplied for a 9 ft opening or $8,800-$12,800 for a 20 ft opening, at 8 ft tall with double glazing. Those are the aluminum bifold ranges in the table below, before freight, duty and installation.
"Panoramic doors" describes the wide view and indoor-outdoor connection, not a single opening mechanism. Bifolds create that connection by folding their panels into a stack; sliding and lift-and-slide doors are other panoramic options with different opening clearances and prices. Compare the sliding patio door cost guide if you want large glass panels that slide instead of fold. For every patio door type side by side, see the patio doors cost overview.
For folding glass doors, price the complete opening at its actual width and height, then confirm panel count, fold direction and glazing. If you mean Aliplast Panorama doors specifically, that is one of the aluminum bifold systems priced here - "Panorama" is its system name, not a price category for every panoramic door.
Bifold door prices by opening size (2026 price list)
The total climbs as the opening widens, while the price per square foot falls - hinges, locks and the track cost about the same whatever the glass area. Here's what that looks like at an 8 ft (96 in) height across common residential widths, plain double glazing, from my estimator:
| Opening width | Approx. area (8 ft height) | Plain glass supplied | Supplied per sq ft |
|---|---|---|---|
| 9 ft (3-leaf) | 72 sqft | $5,200 - $7,500 | $72 - $104 |
| 12 ft (4-leaf) | 96 sqft | $6,300 - $9,100 | $65 - $95 |
| 16 ft (5-6 leaf) | 128 sqft | $7,600 - $11,000 | $59 - $86 |
| 20 ft (6-8 leaf) | 160 sqft | $8,800 - $12,800 | $55 - $80 |
These are supplied prices - the door itself, before ocean freight, customs, import duty and installation. The low end of each cell is the Reynaers ConceptFolding 68 at the bottom of my +/-10% estimate band, the high end the Aliplast Panorama at the top of it. SDL bars add roughly $8/sqft on top (see below). As a rough planning allowance, US installation adds about $25-60/sqft, so a 16 ft x 8 ft opening needs another $3,200-$7,700 for labor; your installer's quote replaces that number. Panel counts are planning examples: the final layout depends on the selected system, panel limits and whether the panels stack left, right or split between both sides. A split stack does not by itself require a second track or a particular change in panel count. Taller panels, up to about 9 ft 10 in, need the heavier Reynaers ConceptFolding 77 or Aluprof MB-86 Fold Line HD, which I price per project.
What European aluminum bifolds actually cost
I source four aluminum bifold systems: the Reynaers ConceptFolding 68 and ConceptFolding 77, the Aluprof MB-86 Fold Line HD and the Aliplast Panorama. My estimator prices the two that cover most residential openings, the ConceptFolding 68 and the Panorama; the other two handle taller, heavier panels and are quoted per project.
Supplied price per square foot (9 to 20 ft wide, 8 ft tall, before freight, duty and installation):
| Configuration | Price range |
|---|---|
| Reynaers ConceptFolding 68, plain glass | about $61 - $80/sqft |
| Aliplast Panorama, plain glass | about $73 - $95/sqft |
| SDL (simulated divided light bars) | add roughly $8/sqft |
Those are the midpoints of my estimate band; the +/-10% accuracy band applies to any early-stage estimate before I have final drawings. Freight, customs and import duty sit on top of the supplied price. Every quote I send is DDP (delivered duty paid), so they are already in the number you sign - and the estimator adds them for your opening.
For a typical residential opening - say 15 feet wide by 8 feet tall (120 sqft) - you're looking at roughly $7,300-$10,600 supplied. Your installer's labor at $25-60/sqft adds about $3,000-$7,200 at that size, and freight and duty come on top of both.
Why per-sqft pricing matters: bifold systems are sold by opening area, not by panel or unit. A 6-leaf system covering 160 sqft costs more in total than a 4-leaf system at 96 sqft - but less per square foot, because the fixed hardware is spread over more glass.
What drives cost up
Panel count. More panels = more hinges, more hardware, more labor. A 6-leaf bifold has six sets of hinges, six panels to align, and a more complex fold sequence than a 4-leaf. Per-sqft pricing absorbs this, but on equivalent opening sizes, more panels push cost up.
Height. Standard aluminum bifold panels go to about 9-10 feet. Taller openings push into a heavier structural profile. Above 10 feet you're in a different system class with a different price tier.
Configuration. Panels can stack to one side or split between both sides, with inward or outward folding where the selected system permits. The stack location, daily access door and threshold affect hardware and detailing. Reynaers' ConceptFolding 77 documentation shows the distinction between one-side and split-stack layouts; confirm your arrangement on the shop drawings.
Finish. Standard RAL powder coat (hundreds of colors available) is included in the base price. Anodized finishes and dual-color (different interior/exterior colors) add cost.
SDL bars. Simulated divided light - the interior grille pattern some architects specify for a steel-look aesthetic - adds roughly $8/sqft over plain glass. Worth it when the design calls for it.
What drives cost down - or doesn't
Size: A bigger opening costs more in total but less per square foot - from a 9 ft to a 20 ft opening the supplied rate drops by roughly a quarter. The smallest practical configuration, an 8 ft x 8 ft 3-leaf, starts around $4,800 supplied.
Fewer panels: If the project can be served by a 2- or 3-panel lift-and-slide instead of a 6-leaf bifold, compare both layouts for total cost and whole-door U-factor. Fewer moving panels can simplify the opening, but the price and thermal result depend on the chosen system and glass. See my bifold vs lift-and-slide comparison for when each is the right call.
Going with uPVC: There's no uPVC bifold system in my current catalog. Aluminum is the right material choice for large exterior folding systems anyway - the structural requirements at wide spans make aluminum the standard.
US-source bifold cost for context
Domestic aluminum bifold systems are often quoted installed and per linear foot of opening width rather than per square foot of glass. Ask for the domestic quote broken into supply and installation, or convert it to the same opening area, before you compare.
European aluminum bifolds supply for about $55-105/sqft of opening area, depending on size and system. At 15 ft x 8 ft (120 sqft), that's $7,300-$10,600 for the door, before freight, duty and your installer's labor. US installation typically adds $25-60/sqft for a large glass system - another $3,000-$7,200 at that opening size.
The overlap is real - you're not always saving dramatically on a bifold vs buying domestic. Compare whole-door thermal ratings, allowable panel sizes, sightlines and finish options for the actual systems quoted; country of origin alone does not establish which performs better. The cost comparison guide covers the cost layers in more detail.
Bifold or lift-and-slide?
If cost is the primary driver, run both numbers before deciding. At similar opening widths, a 2-panel lift-and-slide and a 4-6 leaf bifold can land within 10-15% of each other in total cost.
Bifolds can clear most of the opening by stacking the panels at the sides; confirm the usable width after accounting for the stack and hardware. Lift-and-slide can suit projects prioritizing larger individual panes and everyday sliding access. Compare the actual thermal ratings, panel limits and operating requirements rather than assuming either mechanism always wins.
I typically quote both when the project could go either way. See the full comparison or check the sliding door cost post for lift-and-slide ranges by opening width. For what a four-leaf bifold looks like installed, the Black Rock photos show one opening a full deck elevation alongside curtain wall glazing.
How to get a real number
The per-sqft ranges above are accurate for budgeting and for architect allowance estimates. To turn them into a project-specific number, I need:
- Rough opening dimensions (width x height in inches for each bifold location)
- Panel count target or max panel width (I'll recommend based on the opening)
- Panel stacking and fold direction (left, right or split stack; inward or outward where available)
- Finish (RAL color, anodized, dual-color)
- SDL bars yes/no
With those five inputs I can give you a project quote rather than a ballpark. Use the online estimator to get a preliminary range now, or send me the drawings and I'll quote the whole package.
FAQ
How much do panoramic doors cost? For a panoramic opening using European aluminum bifold doors, budget about $5,200-$7,500 supplied at 9 ft wide or $8,800-$12,800 at 20 ft wide, both 8 ft tall and double glazed. Freight, duty and installation are additional. "Panoramic" can also describe sliding doors, so confirm the opening mechanism before comparing quotes.
How much do bifold doors cost for a 12-foot opening? At 12 feet wide and 8 feet tall (96 sqft), a European aluminum bifold door costs about $6,300-$9,100 supplied, double glazed, depending on the system. US installation labor (typically $25-60/sqft for a large glass system) adds about $2,400-$5,800, and freight and duty come on top - the estimator adds them for your size.
How much does it cost to install bifold doors? As a rough planning allowance, US installation labor for exterior aluminum bifold systems runs about $25-60/sqft of opening area - about $2,400-$5,800 for a 12 ft x 8 ft opening. It varies by region, contractor, access and project complexity, so get a local installer's quote. The supply price I quote does not include US installation.
How much do aluminium bifold doors cost? European aluminium (aluminum) bifold doors cost about $5,200-$7,500 supplied for a 9 ft opening and $8,800-$12,800 for a 20 ft one, 8 ft tall and double glazed - roughly $55-$105 per square foot. Freight, duty and your installer's labor come on top; the price list by panel count near the top of this page shows the steps in between.
How much are bifold doors per panel? There is no fixed price per panel because I price by opening area, not by leaf. As a guide, a 3-leaf 9 ft opening starts around $5,200 supplied and a 6-8 leaf 20 ft opening around $8,800, so adding panels adds hardware but the cost per square foot falls as the opening gets wider.
Are bifold doors more expensive than sliding doors? For equivalent opening widths, aluminum bifold and lift-and-slide systems often land within 10-15% of each other in total cost. Bifolds carry more hardware per panel (hinges, guides, locking bars) which pushes cost up; lift-and-slide panels are individually more expensive but you need fewer of them. Run both numbers for your specific opening.
Why are European bifold doors worth considering vs US brands? European bifold systems offer another set of choices for panel size, sightlines, finishes and thermal performance. Compare those specifications with the US system quoted for the same opening and glass package. For cost, compare the European landed-plus-installed total with the US installed quote; a lower supplied price alone does not establish better value.
Can bifold doors be triple-glazed? Most large aluminum bifold systems use double glazing - triple adds significant weight per panel, which compounds across 6-8 leaves. I don't typically spec triple on bifolds. If thermal performance is the priority, lift-and-slide with triple glazing is the better path.
Are accordion glass doors and bifold doors the same thing? Yes. "Accordion glass door" and "bifold door" describe the same fold-flat, multi-panel mechanism - the difference is regional terminology, not product. If you're pricing accordion glass doors, the ranges on this page apply directly.
How much do wooden bifold doors cost? I don't quote a timber bifold. For a wood interior on a large opening I quote the Timber Lift & Slide in wood or aluminum-clad wood, priced from your drawings rather than a price table - send me the opening and I'll price it next to an aluminum bifold. For the materials themselves, see wood windows.
What's the price for a bifold door price per linear foot vs per square foot? I price by square foot of opening area (product + freight + duty), which is the standard for European aluminum systems. US-sourced systems are sometimes quoted per linear foot of opening width instead - the two aren't directly comparable without converting to a common opening height, so ask which basis you're being quoted on before comparing numbers.
Want a supply price for your opening? Send me the rough opening size and fold direction and I'll turn a number around fast. Use the Estimator | Request a Quote
Kai, your window guy!