Window Replacement Cost Calculator

Window replacement is 4–10% of mid-range home reno; energy savings can offset cost.

Window count

Per window installed

Specialty windows

Specialty premium each

Annual energy savings

Total cost

$11,350

Energy payback (years)

37.8

Per window blended

$757

How the math works

Total = (windows × $/window) + (specialty × premium). Energy payback = total / annual savings.

15 × $650 + 2 × $800 = $9,750 + $1,600 = $11,350 / $300 = 37.8 yr energy payback (mostly comfort).

How to Use

Enter window count.
Enter per window installed.
Enter specialty windows.
Enter specialty premium each.
Enter annual energy savings.
Read total cost.

Frequently Asked Questions

Window cost benchmarks?

Vinyl single-hung (basic): $300–600 per window installed. Vinyl double-hung: $400–800. Vinyl casement/awning: $500–1,000. Wood-clad (Andersen, Marvin): $800–1,800. Aluminum-clad fiberglass: $1,000–2,000. Energy STAR vs basic: 5–15% premium. Triple-pane: 20–35% premium over double. Custom shapes (arched, round): 50–200% premium. Installation: $100–400 each typically included in full-replacement quotes. Bay/bow windows: $1,500–8,000+ each.

How accurate is this estimate?

Material and labor estimates are accurate to ±15% with reasonable inputs but local market conditions vary. Major markets cost 30–60% more than rural. Labor rates regional (union vs non-union, prevailing wage). Material prices fluctuate with commodity cycles. Get 3 contractor bids for any work over $5k. This calculator is a sanity check, not a substitute for actual quotes.

DIY vs contractor?

DIY savings: 40–70% of contractor cost on labor. Realistic skill threshold: painting, basic plumbing, simple electrical, drywall, flooring. Pro required: structural, gas, complex electrical, HVAC, roofing (warranty + insurance), permits. Permitted work without license risks insurance and resale. Time: hobby DIYers 3–5x slower than pro. Tools and learning curve real.

Permit and code compliance?

Permits required for: structural changes, additions, electrical service changes, plumbing rough-in, HVAC replacement, roof replacement (varies), fence (varies). Cost: $50–2,000+ depending on scope. Skipping permit risks: stop work order, fines, forced removal, insurance denial, resale title issues. Always pull permit; cost is small relative to compliance friction.