Search "bifold doors cost" and you'll get everything from $100 closet hardware to $20,000 glass wall systems. The range is not wrong - it's just that these are two completely different products sharing a name.
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 Home Depot run. If you want panoramic outdoor openings in aluminum with real thermal performance, read on.
The two categories - and why they get lumped together
Interior bifold doors (closets, pantries, laundry rooms): $100-600 installed, hollow-core or solid wood, off the shelf at any home improvement store. Labor adds $150-300. Nothing complicated.
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.
What European aluminum bifolds actually cost
The only bifold system I source is the Reynaers ConceptFolding 68 - a robust aluminum system engineered for wide, tall openings with 8-10 leaf stacks. It's the right tool for the job at the high end of residential and light commercial.
Supply price, landed to US jobsite (DDP):
| Configuration | Price range |
|---|---|
| Plain glass (no bars) | $65-72/sqft |
| SDL (simulated divided light bars) | $73-80/sqft |
These are the prices you pay me - product, ocean freight, US customs (26% Section 301 aluminum duty already included), and delivery to your site. No hidden add-ons. The +/-10% accuracy band applies to any early-stage estimate before I have final drawings.
For a typical residential opening - say 15 feet wide by 9 feet tall (135 sqft) - you're looking at roughly $8,750-$10,800 supplied, depending on bar treatment. Add your installer's labor and you're at $12,000-$18,000 fully installed at that size. A 20-foot opening scales proportionally.
Why per-sqft pricing matters: bifold systems are sold by opening area, not by panel or unit. A 6-leaf system covering 180 sqft costs more than a 4-leaf system at 120 sqft - but the per-sqft rate stays relatively stable once you're past the minimum configuration.
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. Single-track (folds one way) vs double-track (folds both ways to center) adds hardware and complexity. Most residential projects use single-track folding to one side or the other.
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: There's no significant economy of scale at the residential level. A bigger opening costs more in absolute terms; the per-sqft rate holds. The floor minimum is around $4,500 for a small 3-leaf configuration.
Fewer panels: If the project can be served by a 2- or 3-panel lift-and-slide instead of a 6-leaf bifold, the lift-and-slide will often come in lower on total cost while delivering better thermal performance. Worth comparing. 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
US-sourced aluminum bifold systems from domestic brands typically land in the $800-2,500/linear foot range installed (that's per linear foot of opening width, not sqft of glass). At 15 feet wide, that's $12,000-$37,500 installed.
European systems on a DDP basis supply for $65-80/sqft of opening area. At 15ft x 9ft (135 sqft), that's $8,750-$10,800 to your site before your installer's labor. US installation typically adds $25-60/sqft for a large glass system, putting the total at $12,000-$18,900 at that opening size.
The overlap is real - you're not always saving dramatically on a bifold vs buying domestic. Where European systems win is on thermal performance and available glass area per panel, not necessarily on sticker price for a base configuration. The cost comparison guide covers the math 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.
Bifold wins on clear opening (90-95% of frame width). Lift-and-slide wins on thermal performance, daily operation ease, and structural capacity for taller, heavier panels.
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.
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)
- Fold direction (single-track left, single-track right, or center-opening)
- Finish (RAL color, anodized, dual-color)
- SDL bars yes/no
With those five inputs I can give you a firm quote, not an estimate. 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 bifold doors cost for a 12-foot opening? At 12 feet wide and 9 feet tall (108 sqft), European aluminum bifold supply price lands at $7,000-$8,600 depending on configuration. Add US installation labor (typically $25-50/sqft for a large glass system) and you're at $9,700-$14,000 fully installed.
How much does it cost to install bifold doors? US installation labor for exterior aluminum bifold systems typically runs $25-60/sqft of glass area for experienced glazers, or $1,500-$4,000 per opening for a standard residential configuration. This varies by region, contractor, and project complexity. The supply price I quote does not include US installation.
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? The main advantages are thermal performance (tighter tolerances, better gasket systems, better U-factors), glass-to-frame ratio (thinner profiles = more glass area), and range of finish options. On price alone, European supply + US install often comes out comparable to US-brand installed prices - you're getting more product for roughly the same money.
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.
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!