Quick Answer
Replacement windows cost $300–$1,200 per window on average for the unit alone in 2026. With professional installation, expect $450–$1,800 per window, and $7,000–$20,000 for a typical whole-house project of 10–20 windows.
Average Cost by Frame Material
| Material | Window Unit Only | Fully Installed |
|---|---|---|
| Vinyl | $300 – $700 | $450 – $1,000 |
| Aluminum | $400 – $900 | $550 – $1,200 |
| Fiberglass | $700 – $1,200 | $950 – $1,650 |
| Wood | $800 – $1,500 | $1,000 – $1,900 |
Vinyl dominates the market on value — see our vinyl window replacement cost guide for brand-level pricing. Considering wood? Our wood window cost guide covers species, maintenance, and true long-term cost.
Average Cost by Project Size
| Project Size | Total Range | Typical Total |
|---|---|---|
| 5 windows | $2,250 – $5,000 | ~$3,500 |
| 10 windows | $4,500 – $10,000 | ~$7,000 |
| 15 windows | $6,750 – $15,000 | ~$10,500 |
| 20 windows | $9,000 – $20,000 | ~$14,000 |
Larger projects unlock bulk pricing — read whether it is cheaper to replace all windows at once. For installation-specific numbers, see our guide on the average cost to have a replacement window installed.
What Drives the Price Up or Down
- Glass package: triple-pane and Low-E coatings add $100–$300 per window but cut energy bills.
- Install type: retrofit (insert) is cheapest; full-frame replacement costs 20–50% more.
- Home condition: rot repair, lead paint, and structural fixes are common add-ons.
- Timing: off-season installs (late fall, winter) often run 10–20% cheaper — see our guide on the cheapest time of year to replace windows.