Window Replacement Cost in 2026
Updated 2026-10-14. All figures were checked on that date.
Short answer: survey and project averages run from $517 per installed window (This Old House 2026 survey) to $1,047 (Modernize). A whole project averages $7,348, with most at $3,436–$11,838 (Angi). All as of 2026-10-14.
Calculator
Installed cost by window type
| Type | Installed per window |
|---|---|
| Single-hung | $200–$850 |
| Double-hung | $429–$915 |
| Sliding | $775–$1,652 |
| Casement | $597–$1,273 |
| Picture | $600–$1,900 |
| Bay/bow | $1,700–$3,859+ |
Source: Modernize window replacement cost, as of 2026-10-14. Modernize puts materials at $897 and labor at $149 of its $1,047 average.
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Frame material
This Old House's 2026 survey found per-window averages from $453 (aluminum) to $564 (fiberglass), and up to $609 for triple-pane glass (This Old House, as of 2026-10-14).
Before you order
- Measure each rough opening width and height in three places and use the smallest.
- Insert (retrofit) windows keep the old frame; full-frame replacement is needed when the frame is rotted or out of square.
- Prioritize the worst windows first if quotes come in high.