Casement windows typically cost $500-$1,500 per installed window, with an average near $900 for a standard-size unit in an existing opening. Size, frame material, glass options, installation access, and whether the opening needs changes have the biggest effect on the quote.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Standard installed casement | $500 | $900 | $1,500 | Common size, replacement opening |
| Window unit only | $250 | $600 | $1,200 | Varies by frame and glass |
| Custom or oversized installed unit | $1,200 | $2,000 | $3,500 | May require structural changes |
| Installed price per sq ft | $35 | $65 | $110 | Approximate; not a substitute for a quote |
Typical casement window prices by size
A standard replacement casement window, roughly 24 by 36 to 36 by 60 inches, often totals $500-$1,500 installed. A 30-by-48-inch vinyl unit with double-pane glass commonly lands around $650-$1,100, including removal of an old window and routine installation. Prices are higher for custom dimensions, premium finishes, or difficult access.
Small units around 18 by 24 inches may cost $350-$800 installed, while units near 36 by 60 inches can reach $800-$1,700. A larger casement or pair of joined windows may exceed $2,000, particularly when the wall opening must be widened or reinforced. For a straightforward replacement, budgeting about $700-$1,200 per window is a useful starting point.
Assumptions: Existing opening is sound, access is ordinary, and pricing reflects common U.S. labor and standard double-pane glass.
What the frame, glass, and installation add
The window unit is only part of the installed price. The table gives typical per-window ranges for a standard-size replacement; unusual trim, high windows, or repairs can add charges.
| Quote component | Low | Average | High |
|---|---|---|---|
| Window unit and standard glass | $250 | $600 | $1,200 |
| Installation labor | $200 | $400 | $700 |
| Removal and disposal | $50 | $100 | $200 |
| Flashing, insulation, and trim materials | $40 | $100 | $250 |
| Permit or inspection, when required | $0 | $75 | $300 |
Labor is commonly billed as part of a project price, but a rough estimating formula is useful: A two-to-four-hour installation at $75-$125 per hour implies $150-$500 in labor before trip minimums or other work. Ask whether the quote includes disposal, interior trim, exterior sealing, and sales tax.
How vinyl, fiberglass, and wood change the price
Vinyl is generally the lowest-cost frame choice, often adding little beyond the base unit price. Fiberglass units commonly cost 20%-50% more than comparable vinyl, while wood or wood-clad casements may cost 30%-100% more. Premium finishes, laminated glass, and custom colors can increase the unit price further.
Glass specifications also matter. Standard double-pane insulated glass is typical for replacement work; low-E coatings or argon fill may add roughly $30-$150 per window depending on brand and size. Triple-pane glass can add $100-$300 or more. Compare the same dimensions, frame, glass package, and warranty when reviewing two quotes.
Which opening dimensions push a quote upward?
Many manufacturers offer standard sizes, but actual nominal dimensions and availability vary. A window wider than about 36 inches or taller than 60 inches is more likely to require a special order, reinforced hardware, or a heavier sash. Custom sizing can add 15%-40% to the unit price and may extend lead time.
Changing the rough opening is a separate scope item. Widening a wall opening can add $500-$2,000 or more for framing, siding, drywall, and finish work; a load-bearing wall may require an engineer or additional structural work. Replacing a window without altering the opening is usually much less expensive. Confirm whether the measurement is the existing frame size or the rough opening before accepting a price.
How many labor hours does each installation take?
A skilled installer may need 2-4 hours for one accessible replacement with no framing repairs. Two installers can often fit several similar windows in a day, while upper floors, masonry, interior finish work, or damaged frames can extend the schedule. New construction or altered openings take longer than a simple insert replacement.
Some companies set a minimum charge, so one window may cost more per unit than a multi-window job. For example, a $300-$600 crew minimum can make a single small installation less economical, while installing four to six windows may spread setup and travel costs across the project. Request labor hours or a per-window rate and clarify what conditions trigger extra charges.
How regional labor rates shift installed prices
Installed prices in high-cost metro areas, including parts of the Northeast and West Coast, may run 15%-30% above a national middle estimate. Smaller cities and rural markets may come in 5%-20% below it, although travel fees and fewer available contractors can offset the difference. Local code requirements and disposal fees also vary.
These are broad comparisons, not fixed regional rates. A $900 standard installation in a moderate-cost market might quote around $1,035-$1,170 in a high-cost city, before unusual access or opening repairs. Compare written local bids with matching window specifications rather than relying on a national average alone.
Repairing hardware versus replacing the whole window
If the frame is sound and the sash is not rotted, replacing a crank, hinge, or lock may cost $75-$300 per window including service labor. Replacing a failed insulated glass unit can cost roughly $150-$500, depending on dimensions and availability. These repairs can make sense when the rest of the window operates and seals properly.
Full replacement is more likely to be economical when the frame is deteriorated, the sash is warped, or multiple components have failed. A contractor should distinguish a hardware repair from a complete sash or frame replacement, since the terms can sound similar but have very different prices. Get a repair quote before replacing a serviceable frame solely because the crank or glass has failed.
Ways to trim a casement window estimate
Keep the existing opening and choose a standard size and finish when practical. Vinyl with standard double-pane glass generally costs less than custom wood or specialty glazing. Avoid upgrading every window automatically; prioritize rooms with failed seals, damaged frames, or a clear comfort problem, and compare repair costs for units that remain structurally sound.
Obtain at least three itemized quotes and check that each includes the same number of windows, glass features, disposal, flashing, trim, and warranty. Scheduling several replacements together may reduce per-window labor or trip charges. Do not skip necessary flashing or weather sealing to lower the bid; water intrusion can create more expensive repairs. The most reliable savings come from controlling size and scope while comparing equivalent materials and installation work.