A bifold door cost calculator should distinguish a lightweight interior closet door from a large exterior folding patio system. Installed prices commonly range from $450-$1,800 for an interior opening and $4,000-$12,000 for an exterior door, with material, opening size, glazing, and site work driving the quote.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Interior bifold door | $450 | $950 | $1,800 | Installed, standard-size opening |
| Exterior folding door | $4,000 | $7,500 | $12,000 | Installed, common 6-12 ft opening |
| Interior door unit only | $120 | $350 | $900 | Per opening; material and finish vary |
| Exterior door unit only | $2,500 | $5,500 | $9,000 | Per system; glazing and frame affect price |
Assumptions: U.S. mid-market pricing, standard access, no major structural changes; local quotes vary.
What a standard bifold door costs by opening size
Interior bifold doors for closets, laundry areas, and pantries generally cost $120-$900 for the door and hardware. Installation adds about $250-$700, putting a straightforward project near $450-$1,800. A basic hollow-core unit at a standard opening sits near the low end; solid wood, custom dimensions, and upgraded finish increase the total.
Exterior bifold systems cost more because they use larger panels, weather seals, stronger tracks, and often insulated glass. A common 6- to 8-foot-wide configuration may total $4,000-$8,000 installed, while wider or premium systems can reach $12,000 or more. For an estimate, first identify whether the project is an interior closet door or an exterior folding wall.
How panels, tracks, labor, and framing shape the quote
Quotes combine the door package with installation and any opening work. For exterior systems, a threshold, flashing, trim, and weatherproofing are important parts of a complete installation, not optional cosmetic extras.
| Quote component | Interior range | Exterior range | Typical basis |
|---|---|---|---|
| Door panels and hardware | $120-$900 | $2,500-$9,000 | Per opening or system |
| Installation labor | $250-$700 | $900-$2,500 | About $75-$125 per hour |
| Track, trim, and sealing | $40-$250 | $250-$1,000 | Hardware, finish, and weatherproofing |
| Removal and disposal | $50-$200 | $150-$600 | Existing door and debris |
| Opening repair or framing | $0-$500 | $300-$2,500 | Condition and structural scope |
Ask whether the quote includes removal, trim, disposal, and exterior water sealing before comparing totals.
How opening width, panel count, and glass affect pricing
Width is a major cost driver for exterior doors. A 6-foot opening may use fewer or smaller panels than a 10- to 12-foot opening, while wider spans can require heavier tracks, more hardware, and structural support. Each additional panel can add roughly $500-$1,500 to an exterior system, depending on material and glazing.
For interior doors, standard openings around 24-36 inches are less costly than custom widths or heights. Resizing a rough opening can add $300-$1,500 indoors; exterior header or wall changes may add $1,000-$4,000 or more. Double- or triple-pane glass, low-emissivity coatings, and safety glass can add hundreds to several thousand dollars. Measure the finished opening and confirm panel configuration before requesting bids.
Three bifold door installation quotes with different scopes
A basic closet replacement might include a 30-inch hollow-core unit at $180, hardware at $60, and three hours of labor at $90 per hour. With removal and minor trim work, the total is about $650.
A solid-wood interior door for a wider laundry opening could cost $650 for the unit, $120 for upgraded track and trim, and five labor hours at $100 per hour. Minor opening adjustment and disposal bring the estimate to about $1,450.
A 10-foot aluminum exterior system with insulated glass might cost $6,200 for the package, $1,600 for installation, and $900 for removal, flashing, and finish work, totaling about $8,700. These examples show how scope—not just the door’s advertised price—changes the final amount.
When installation labor and old-door removal add fees
A simple interior installation often takes 2-5 hours for one installer. Exterior systems may require a two- or three-person crew and 8-16 labor hours, with additional time for leveling, sealing, and adjustment. Labor rates commonly run $75-$125 per hour, though contractor minimums may apply to small jobs.
Removal can cost $50-$200 for an interior door and $150-$600 for an exterior assembly, especially if the old frame must be dismantled. Difficult access, damaged subfloor, uneven walls, or concealed rot can add $200-$1,500. Request a written allowance for hidden damage rather than assuming repair work is included.
Aluminum, wood, and uPVC bifold doors compared
For interior doors, hollow-core units are generally the least expensive, while solid wood and custom finishes cost more. Exterior systems are commonly available in aluminum, wood, or uPVC. Aluminum is widely used for larger glazed spans and typically falls in the middle-to-high price range; wood can carry a premium for custom finishes and upkeep; uPVC may cost less but has fewer options for some large openings.
| Exterior material | Door-only range | Installed range | Price consideration |
|---|---|---|---|
| uPVC | $2,500-$5,000 | $4,000-$7,500 | Often lower-cost standard configurations |
| Aluminum | $3,500-$7,500 | $5,000-$10,500 | Strong frames suit wider glazed systems |
| Wood | $4,000-$9,000 | $5,500-$12,000 | Finish and maintenance affect lifetime expense |
Ranges reflect common product tiers; custom colors, hardware, and glass packages can exceed them.
Can standard sizing or repair lower the bifold door bill?
Keeping the existing opening and choosing a stock size can avoid custom fabrication and framing charges. For a sticking interior door, replacing a pivot, roller, or track may cost $75-$300, compared with hundreds of dollars for a full replacement. Repair is less practical when panels are warped, the frame is damaged, or the track system is obsolete.
Compare at least three itemized quotes for the same opening dimensions, material, glass, and included finish work. Buying a door separately may reduce product cost, but confirm the installer accepts customer-supplied materials and provides a warranty on labor. Control scope first: avoid paying for structural changes or premium glass unless the opening or performance needs justify them.
Regional labor and permit costs for exterior bifold doors
Labor and delivery can make exterior installation roughly 10%-25% more expensive in high-cost metro areas than in lower-cost rural markets. Remote locations may also face higher freight charges, while coastal areas can require corrosion-resistant hardware or stricter wind-load products.
Replacing a door within an unchanged opening may not require a permit, but enlarging an exterior opening or altering a load-bearing wall often requires approval and inspection. Permit fees commonly range from $50-$500, excluding engineering or plan costs. Check local rules and wind or energy requirements before ordering a nonreturnable custom system.