Window Replacement Cost Calculator
Last updated: October 15, 2026
Estimate window replacement materials, installation labor, finishing, permits and contingency.
Starting figures illustrate this model. Enter your own measurements, quoted costs and applicable terms; this page does not retrieve live prices or provider rates.
Estimated window replacement cost
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- Window units: —
- Installation labor: —
- Contingency allowance: —
- Average installed cost per window: —
On this page
Quick summary: Estimate window replacement materials, installation labor, finishing, permits and contingency.
Read the complete guide
Updated reference sections in this guide are in English.
What this calculator estimates
Estimate window replacement materials, installation labor, finishing, permits and contingency.
How to use it
Enter Number of windows; Average window unit cost ($); Installation labor per window ($); Trim, disposal and finishing ($); Permit costs ($); Contingency (%). Select Calculate to update the results.
How the calculation works
The calculator multiplies window and labor rates by the number of openings, then adds finishing, permit and contingency costs.
Worked example: starting scenario
| Number of windows | 12 |
|---|---|
| Average window unit cost ($) | 700 |
| Installation labor per window ($) | 250 |
| Trim, disposal and finishing ($) | 1500 |
| Permit costs ($) | 300 |
| Contingency (%) | 8 |
| Estimated window replacement cost | $14,256.00 |
|---|---|
| Window units | $8,400.00 |
| Installation labor | $3,000.00 |
| Contingency allowance | $1,056.00 |
| Average installed cost per window | $1,188.00 |
Important limitations
Custom sizes, structural repairs, lead-safe work, historic requirements, glazing packages and access conditions can change pricing.