French Door Cost in 2026: Exterior Hinged vs. Sliding Frenchwood, Installed Prices, and Measured U-Factors

First decide which “French door” the quote means

For an exterior opening, a traditional French patio door has hinged panels that meet at the center. A French-style gliding door borrows the wider, traditional panel look but moves on a track. Andersen sells both under its Frenchwood name. Its 400 Series hinged product page says both doors swing in from the center; its 400 Series Frenchwood gliding page identifies a sliding operation. The visual style alone does not tell you what mechanism is being priced.

That difference matters before material, glass, or hardware. A hinged pair needs swing space inside or outside the room, depending on the product. A gliding configuration keeps the floor space clear. For a cramped deck, a slider may be the practical way to get a French look; for a homeowner who wants the central two-panel swing, it is not an equivalent substitute. Ask the seller to put the operation and handing on the quote, preferably with the manufacturer's exact product name.

This page is about exterior patio doors. Interior French doors do not need the same weatherproofing, threshold, or thermal rating and are included in some generic cost headlines. The broader patio-door replacement guide covers standard sliders and large multi-slide systems. The numbers below stay with exterior French-style products and say when a source blends categories.

What an exterior French door costs installed

The most relevant published baseline I found is HomeBuddy's September 2026 French-door guide. Its table lists exterior and patio French doors at $500–$4,000 for the doors only and $1,500–$5,000 installed. In the same guide, exterior French-door replacement labor is $700–$1,500, while its opening headline says French-door installations overall commonly fall at $1,500–$4,500. The headline blends interior and exterior projects; the exterior row is the better comparison for this page.

HomeBuddy's patio-door replacement guide gives a nearby but different $1,300–$5,500 installed band for exterior French patio doors. It also prices ordinary sliding patio doors at $1,200–$4,000 installed. The two French bands overlap substantially, but their low and high ends differ. One page groups French-door installation generally; the other groups patio-door replacements by type. Neither reports a measured national sample for a single size, glass package, and labor scope. Use the ranges to test whether a quote deserves closer inspection, not to declare a local bid fair or unfair by itself.

The first three rows come from HomeBuddy's French-door guide; the fourth from its patio-door guide, and the named unit from Home Depot's live product listing, all retrieved 2026-09-29.

The last row makes the installed-versus-unit issue tangible. Home Depot listed an Andersen 200 Series hinged inswing patio door, model 9180302, at $3,118.00 when retrieved. The listing describes a 71-1/4 by 79-1/2 inch door with Low-E glass and a white interior. It does not show a final installed price for a particular home. Home Depot also notes that local store prices can vary. If a homeowner compared that unit directly with HomeBuddy's lower installed band and concluded installation must be cheap, the comparison would be false: the two figures are from different product mixes, locations, and scopes. Ask for a written all-in quote on that exact model if it is the product you want.

The opposite mistake is to add the top of HomeBuddy's door-only range to the top of its labor range and call the result a 2026 “typical” installed price. These are independently reported ranges, not matched observations. A custom opening, trim reconstruction, or impact-rated product can push a job outside a standard range; a same-size replacement in a sound opening can be simpler. The quote should state the door unit, removal, labor, sill and frame condition, flashing, trim, disposal, and any finish work separately enough for you to see which variables caused the number.

Hinged versus sliding Frenchwood: what the manufacturer measures

Many buying guides say one style is “energy efficient” without giving the configuration or test value. Andersen's 2025–26 400 Series NFRC certified total-unit performance PDF lets us hold the manufacturer and glass package constant while changing operation. The table below transcribes its values for Frenchwood two-panel gliding AND-N-6 and Frenchwood hinged inswing AND-N-10, without grilles. U-factor is a whole-door heat-loss measure; lower means less heat transfer. SHGC measures solar heat admitted; lower means less solar gain. VT measures visible light through the whole assembly; higher means more daylight. These are reference ratings for specified configurations, not a promise for every size or option.

Source: Andersen, 2025–26 400 Series NFRC certified total-unit performance, pages 8 and 10 of the PDF, retrieved 2026-09-29 (primary-document extraction). The PDF labels its printed guide pages separately from PDF page numbers; the product rows are on printed guide pages 8 and 10. Its notes say the data was accurate as of December 2024 and may change, despite the 2025–26 guide label.

The comparison reveals two useful details. Under the same dual-pane Low-E4 package, the gliding and hinged products have the same 0.30 U-factor but different solar gain and daylight ratings. Switching both to the listed HeatLock package changes each whole-unit U-factor to 0.27, while the hinged version still has the lower SHGC. Under SmartSun, the SHGC difference is larger than the U-factor difference: the gliding unit is 0.18 and the hinged is 0.16, both at 0.30 U-factor. A salesperson's claim that a hinged door is categorically more insulating than a slider is not supported by these particular paired rows. The glass package and the full tested configuration matter.

This table is a comparison of ratings, not prices. The published PDF does not price these glass options or tell us the price difference between the hinged and gliding 400 Series products. I did not attach an invented upgrade charge to a U-factor. Ask the bidder for the exact glass option and its separately stated price. If the quote says only “Low-E,” it is not detailed enough to map to these rows.

The comparison also has a useful limit: Andersen's rows describe its own Frenchwood products. They cannot tell you that every sliding French-style door matches a hinged competitor, or that an installation will perform exactly like the tested unit if its frame is poorly sealed. The named model and glass package make the table a starting point for an informed question, not a substitute for the delivered label. When comparing another maker, request that maker's whole-unit NFRC information for its own configuration. A brochure's glass-only number may look better simply because it leaves the frame out of the measurement. The DOE guide explains this measurement difference; comparing like ratings prevents a false win on paper.

Why “glass U-factor” can mislead a door purchase

The U.S. Department of Energy's measurement guide explains that an NFRC whole-window U-factor covers the glazing, frame, and spacers, while a center-of-glass figure covers the glazing alone. The same distinction matters when comparing the Andersen whole-door ratings above with a glass-only figure from a brochure. For a product-to-product comparison, ask for the whole-unit NFRC value of the exact door.

The Andersen PDF itself cautions that performance values vary with size, configuration, and options, and tells readers to contact an Andersen supplier for unit-specific data. That caveat matters because a grille pattern, blinds between glass, or another glass package can change the entry. In the PDF's dual-pane Low-E4 rows, the gliding door without grilles has 0.30 U-factor, while its blinds-between-glass row has 0.36. The hinge version changes from 0.30 without grilles to 0.34 with blinds between glass. Those are not ratings for the Home Depot 200 Series door above; that is a different series. Never paste a 400 Series NFRC figure into a 200 Series retail listing.

If you care about solar gain on a particular wall, ask for SHGC alongside U-factor. The same Andersen table shows that changing from standard Low-E4 to SmartSun reduces SHGC in both operation styles while the U-factor remains 0.30 in those rows. The choice cannot be made from the word “Low-E” alone. The best fit depends on climate, orientation, shade, and the desired daylight; the cited values show the physical tradeoff, not a calculated bill saving. I did not find a primary-source assumption set that would support a dollar payback claim for either Frenchwood option.

Which configuration fits the opening

Door operation changes how you use the space. With a hinged inswing pair, furniture and rugs must stay clear of the panel arc. Andersen's product page says the 400 Series Frenchwood hinged doors swing in from the center. A gliding Frenchwood door travels along its frame and preserves floor space in the room and on the deck, but its opening and threshold feel different. An outswing hinged product would solve a different floor-space problem and should be named explicitly; the NFRC table above is for hinged inswing. Do not assume that any hinged quote uses the same rated product.

The existing opening controls the install scope. A same-size replacement may reuse a sound rough opening, but a change in width, damaged sill, or new door opening brings framing and exterior repair into the job. HomeBuddy's patio-door guide specifically says that placing a patio door where none existed adds creation of a wall opening, framing, flashing, siding repair, and interior finish work. The French-door guide likewise distinguishes exterior replacement labor from new-opening structural work. Ask a bidder to photograph and describe the existing sill and threshold after removal; water damage at the sill is a common reason a neat-looking surface replacement turns into a larger job.

The exterior finish around the opening matters as much as the door unit. A quote that includes removal and disposal but omits trim, flashing, or siding patching is incomplete if those pieces must be disturbed. The siding repair-or-replace guide explains how to evaluate wet cladding around an opening. If the rough opening or surrounding wall is damaged, a door-only price cannot resolve it. Write into the proposal how concealed damage will be documented and priced before the crew covers it.

A local permit example, with a clear boundary

Permits are local. The City of Portland, Oregon, lists replacement of doors or windows when the existing opening is not widened or reduced in size among outside home projects that do not need a building permit for a one- or two-family house. The same city page says work must still meet building and zoning requirements even when no permit is needed. This is a useful scope distinction for a Portland homeowner comparing a same-size French-door swap with a proposed wider opening.

It is not a rule for the rest of the country, and it does not decide a Portland job with structural changes. If a bid includes enlarging the opening, moving load-bearing framing, or changing another regulated feature, ask Portland's permitting department for the applicable route. At a different address, ask that jurisdiction. A seller's blanket “no permit needed” statement is not enough when the quoted scope is still vague.

The page's cost implication is narrow but real: if two bids describe different opening sizes, they may carry different permitting, structural, trim, and siding tasks. Compare like scopes before comparing their totals. Portland's exemption is also an example of why door unit cost cannot stand in for an installed project price. The code and the physical opening are part of the job.

There is a second comparison hidden in a change of operation. A hinged door may be proposed to replace an existing slider, or a gliding Frenchwood door may be proposed in place of a hinged pair. Either may fit the same nominal wall opening, but that alone does not establish that the existing sill, weather barrier, trim, and interior floor clearance suit the new frame. Ask each bidder to measure the actual rough opening and describe any threshold or finish changes required by the switch. The HomeBuddy patio-door guide distinguishes straightforward replacement from jobs that alter the opening or repair the frame. The meaningful cost comparison is the complete installed scope for your selected operation, not a catalog width or a door-unit price in isolation.

Compare bids on the same written scope

Give bidders the same opening dimensions, photos of both sides, desired operation, and any known leak history. Ask each one to name the exact model, handing, frame material, glass package, grille option, hardware, and whether the unit is preassembled. Then request a separate labor description: old-door removal, disposal, sill or rough-opening preparation, weather barrier and flashing, threshold sealing, interior and exterior trim, finish, and cleanup. “Install French door” is too broad to compare against another “install French door” line.

For the energy portion, request the NFRC label or manufacturer performance sheet for the specific quoted configuration. Use the Andersen table as an example of what a real spec can look like: named product, operation, pane count, glass coating, grille condition, whole-unit U-factor, SHGC, and VT. The final label may differ from a reference table because size and options vary. The DOE guide explains why a glass-only number is not an equivalent substitute for a whole-product label.

For price, ask whether the unit-only line is taxable at your address and whether the labor quote includes finish repairs. A store listing can change by location and date; Home Depot says local prices may vary. HomeBuddy's ranges are useful orientation, but their labor and material bands were not published as matched pairs for a specific house. The bidder's written dimensions, product identification, and scope are more useful than a national midpoint once you have them. If a low bid omits flashing or sill repair that another includes, ask for the missing tasks to be priced before choosing.

Keep the final paperwork with the product label and installation scope. If a later service question arises, the model name and glass option will tell you which manufacturer document applies; a generic invoice saying “French doors” will not. Photograph the label before it is covered by finishing work, and keep the bid's change orders with the invoice. This also makes future comparisons more honest: a later homeowner can distinguish the door's measured thermal rating from an installer claim or a glass-only brochure number. The same record lets you check whether the installed configuration matches the one you selected after reviewing the performance table.

What we could not verify

All sources cited below were reachable during this review.

Questions to ask before you compare quotes

• Is this a hinged French door or a French-style gliding door?
• Does the price include the door unit and professional installation?
• Which NFRC U-factor and SHGC apply to the exact glass and grille package?
• Are removal, sill repair, flashing, and finish work in the quote?

Sources

All retrieved 2026-09-29.

1. HomeBuddy, "French Door Installation Cost in 2026: Full Pricing Guide"
2. HomeBuddy, "Patio Door Replacement Cost: 2026 Full Price Guide"
3. The Home Depot, "Andersen 200 Series Hinged Inswing Patio Door, model 9180302"
4. Andersen, "2025–26 400 Series NFRC Certified Total Unit Performance" (primary-document extraction)
5. Andersen, "400 Series Frenchwood Hinged Patio Door"
6. Andersen, "400 Series Frenchwood Gliding Patio Door"
7. U.S. Department of Energy, "Measure Guideline: Energy-Efficient Window Performance and Selection" (primary-document extraction)
8. City of Portland, Oregon, "Do you need a permit for your home project?" (primary-document extraction)