French windows, usually paired casement windows with two opening sashes and no center post, typically cost $1,000-$3,000 per installed opening. Frame material, window size, glass options, labor, and whether the existing opening needs repair have the biggest effect on the final quote.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| French casement window unit | $500 | $1,350 | $3,500 | Per opening, before installation |
| Installation labor | $250 | $600 | $1,200 | Per opening; more for difficult access |
| Installed replacement | $800 | $1,950 | $4,700 | Standard-size opening and ordinary trim |
| Custom or large opening | $2,500 | $4,500 | $8,000+ | May include structural or exterior work |
What a paired French casement window costs installed
A standard, factory-sized French casement window with vinyl frames generally costs $800-$1,600 installed. Fiberglass or wood versions commonly reach $1,400-$3,000, while a large custom unit with premium glass can exceed $4,500. These totals assume one existing opening, ordinary interior and exterior access, and no major framing repairs.
A practical planning figure is about $1,950 per opening for a midrange replacement. That estimate usually covers the window, removal of the old unit, installation, basic flashing, insulation, and standard trim touch-ups. It does not necessarily include painting, new siding, permit charges, or repairs to concealed water damage.
Per-square-foot pricing is less reliable than a per-opening quote because paired sashes, hardware, and installation work add cost beyond the glass area. As a rough comparison, installed pricing often works out to $45-$100 per sq ft for common products and $100-$180 per sq ft for custom or premium configurations. Ask the contractor to state the opening dimensions and whether the quote covers both sashes.
Assumptions: U.S. standard replacement opening, midrange product, normal access, and no structural changes. Local labor rates and manufacturer options can move totals substantially.
How glass, frames, removal, and labor shape the quote
French window quotes combine the product itself with removal and installation tasks. Confirm whether the price includes both casement panels, a center meeting stile, locking hardware, screens, disposal, and finishing. A low product price may omit features that are necessary for a complete, weather-tight installation.
| Quote component | Low | Average | High | Typical basis |
|---|---|---|---|---|
| Window unit and hardware | $500 | $1,350 | $3,500 | Per opening; material and size drive range |
| Removal and disposal | $75 | $200 | $450 | Per old window, depending on access |
| Installation labor | $250 | $600 | $1,200 | Per opening and crew complexity |
| Trim, flashing, and insulation | $100 | $300 | $800 | Per opening; finish work varies |
| Permits or inspection | $0 | $150 | $500 | Per project, based on local rules |
Labor can be estimated as . Many straightforward replacements take 3-6 labor hours per opening, often with a two-person crew. At a combined billing rate of $75-$125 per hour, installation labor may fall around $450-$1,500 once travel, setup, and finishing are included.
Window, labor, and finish work are the main quote components; confirm each is itemized. A contractor may price a multi-window job at a lower labor amount per opening because setup and disposal are shared. Conversely, upper-floor access, fragile finishes, or a masonry opening can add a separate charge.
Why opening width, frame material, and glass change prices
Size and material account for much of the difference between a basic replacement and a custom French window. A common opening around 3-by-4 ft can use a stock unit, while a 5-by-5 ft or wider opening may require a larger product, stronger hardware, or a made-to-order frame. Custom sizing can add roughly 20%-60% over a comparable standard unit.
Vinyl is typically the lowest-cost frame option, often $500-$1,300 for the unit. Fiberglass commonly costs $900-$2,200, while wood units often range from $1,000-$3,000 before installation. Wood-clad products and architectural finishes can reach $2,000-$5,000 or more. These are product ranges; installation and finishing are additional.
Glass selection also matters. Standard double-pane insulated glass is generally included in midrange products. Low-emissivity coatings, argon gas, laminated security glass, and triple-pane packages may add $100-$600 or more per opening, depending on size and manufacturer. In cold climates, higher-performance glazing may improve comfort, but the added upfront expense should be compared with local energy costs.
Dimensions, frame material, and glazing specification should appear in the written quote. Also check the unit’s energy rating, warranty coverage, screen type, and hardware finish. Two quotes with the same description of “French windows” may cover very different products.
How replacement differs from enlarging a window opening
Replacing a French casement window inside the existing frame or rough opening is usually the least expensive scope. A full-frame replacement, which removes the old frame and exposes the opening, costs more but can address rot, leaks, or poor insulation around the perimeter. Expect roughly $200-$800 more per opening for additional removal and finish work, with wider variation if damage is uncovered.
Changing the opening size is a different project. Widening or raising an opening can require new framing, siding or masonry work, interior patching, and sometimes a structural engineer. A modest enlargement may add $1,000-$3,500; changing a load-bearing wall or cutting brick can add $3,000-$8,000 or more beyond the window installation.
French casement units should not be confused with French doors, which are full-height door assemblies. A paired window may cost under $3,000 installed in a routine replacement, whereas a French door project commonly costs $2,000-$6,000 or more and can require threshold, flooring, and weatherproofing work. Clarifying whether the opening reaches the floor prevents mismatched estimates.
Keeping the existing opening usually saves more than choosing a slightly cheaper frame. When water damage or drafts are present, compare a basic insert replacement with a full-frame option rather than assuming the least disruptive installation is the best long-term fix.
How labor time and difficult access affect installation
A simple ground-floor replacement generally takes 3-6 labor hours per opening, including removal, setting, sealing, and basic trim. A two-person crew may finish one or two standard units in a day, depending on the number of windows and the condition of the openings. Full-frame work, custom fitting, or extensive finishing can extend the job to 6-10 hours per opening.
Labor rates vary with local wages, contractor overhead, and job complexity. A general planning range is $75-$125 per billed labor hour, though urban markets and specialized historic-window installers may charge more. Many companies use a per-window price instead of disclosing hourly rates, so compare scope and crew assumptions rather than treating labor totals as directly interchangeable.
Second-story openings may require ladders, scaffolding, or lift equipment, adding about $100-$500 per opening in ordinary cases. Limited interior access, steep landscaping, security restrictions, or the need to protect expensive floors can also increase setup time. If the wall contains rot, mold, or deteriorated flashing, repairs are usually quoted separately after the old unit is removed.
Access and concealed damage can make the final invoice higher than the initial installation allowance. Ask whether the contractor will obtain approval before doing extra work and request a written rate for framing repair, trim replacement, and weather barrier repairs.
What three common French window quotes include
The following examples show how size, product tier, and scope change a quote. They represent illustrative U.S. pricing rather than fixed national rates. Regional wages, brand, dimensions, and site conditions may shift the total by 15%-30% or more.
| Example | Specification | Labor and extras | Estimated total |
|---|---|---|---|
| Basic replacement | One 3-by-4 ft vinyl pair, $650-$1,000 | 4-5 labor hours; removal and basic trim, $400-$650 | $1,050-$1,650 |
| Midrange upgrade | One 4-by-5 ft fiberglass pair, $1,300-$2,100 | 5-7 labor hours; disposal and finish work, $650-$1,000 | $1,950-$3,100 |
| Custom wood project | One 5-by-5 ft wood unit, $2,800-$4,500 | 8-12 labor hours; custom trim and access, $1,200-$2,300 | $4,000-$6,800 |
In the basic example, the opening is sound and no siding or interior repainting is needed. The midrange quote includes a more durable frame and ordinary removal. The custom example allows for a made-to-order unit and more labor but excludes major structural changes, extensive masonry work, and premium decorative glass.
Compare quotes by matching dimensions, frame, glass, removal, and finish scope. A quote that is $500 lower may exclude disposal, screens, flashing, or interior casing. Ask each bidder to identify allowances and exclusions so the totals reflect comparable work.
How U.S. region and climate affect French window pricing
Prices tend to be higher in dense, high-wage metro areas and in markets with limited installer availability. Compared with a typical midrange U.S. estimate, large coastal cities can run about 15%-30% higher. Smaller towns and rural areas may be 5%-15% lower for labor, although delivery charges or limited contractor competition can offset that difference.
Climate affects product choices more than the basic installation method. Cold regions often favor low-emissivity glass and well-insulated frames; hot, sunny regions may prioritize solar-control coatings. Upgrading to a higher-performance glass package can add $100-$600 per opening, while special impact-resistant glazing in storm-prone areas can add $300-$1,000 or more, depending on size and code requirements.
Historic districts and coastal jurisdictions may impose additional product or permitting requirements. A permit or review can cost $50-$500, but design review, engineering, or required product testing may raise the project expense. Confirm local requirements before ordering custom windows, since a noncompliant unit may be costly to replace.
Use local quotes for labor and code requirements, then compare product specifications nationally. A contractor familiar with the area can identify whether wind rating, energy rules, historic appearance, or installation methods affect the estimate.
Ways to lower the price without sacrificing weather-tightness
Keep the existing opening dimensions when the frame and surrounding wall are sound. Stock-size vinyl or fiberglass units generally cost less than custom wood products, and selecting a standard color, grille pattern, and hardware finish can avoid special-order charges. Avoid paying for decorative options that do not address a real privacy, safety, or climate need.
Replacing several windows at once can reduce the per-opening cost by spreading delivery, setup, and disposal across the project. Request separate prices for one opening and for the full group to see whether the contractor is applying a genuine volume discount. Scheduling during a contractor’s less busy period may improve availability, but weather-sensitive exterior work can still be delayed.
Prepare the work area by moving furniture and window treatments, and ask whether the homeowner can handle simple interior clearing. Do not remove trim or disturb flashing unless the contractor approves; damage can create more expense than the saved labor. Compare at least three itemized bids and check installation warranty terms, not only the product warranty.
Control custom sizing, upgrades, and scope changes before ordering. Get written approval rules for hidden repairs, confirm disposal and finish work are included, and avoid choosing the lowest bid if it omits proper flashing or weather sealing.