Window & Door Replacement Cost Calculator
Exterior

Window & Door Replacement Cost Calculator

Free window & door replacement cost calculator. Vinyl, wood, fiberglass, patio, entry, and interior — with IRA tax credit guidance.

Enter your inputs and we'll show you the estimated exposure, severity, urgency, and recommended next steps.

About this calculator

Old single-pane windows can cost 30-50% more in monthly heating and cooling than modern double-pane low-e units. This calculator estimates the total replacement cost based on material, count, and the often-missed doors that come up at inspection.

Free calculator vs full Buyer's Leverage report

What this calculator shows you

  • Estimated repair exposure range
  • Severity, urgency, and negotiation relevance for this issue
  • General next-step checklist
What a full Buyer's Leverage report unlocks
  • Issue-by-issue inspection analysis across your whole report
  • Total repair exposure with prioritization
  • Negotiation strategy + seller-credit guidance
  • Repair timeline and specialist recommendations
  • Related-issue patterns the inspector may have missed
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Frequently asked questions

Vinyl vs wood vs fiberglass — which lasts longest?
Fiberglass (40-50 years) > wood (25-40 years with maintenance) > vinyl (20-30 years). Fiberglass costs 1.5-2× vinyl but lifetime cost-per-year is the lowest.
Do new windows really save energy?
Going from single-pane to double-pane low-e windows typically saves 15-30% on heating/cooling. Going from existing double-pane to triple-pane saves only an additional 5-8% — rarely worth the cost.
What's the federal tax credit for new windows?
ENERGY STAR-certified windows qualify for the IRA 25C credit — 30% of cost, up to $600/year. Doors qualify up to $250/door, $500/year combined.
Should I negotiate window replacement at inspection?
Only if the inspector documents seal failures, broken glass, or rotted frames. Cosmetic age-only requests rarely succeed. Steel entry doors with documented security issues are stronger asks.
Calculator results are estimates for educational planning only. Actual repair costs, negotiation outcomes, and professional recommendations vary by property, location, contractor, inspection findings, and market conditions. Buyer's Leverage does not replace licensed inspectors, contractors, engineers, real estate agents, attorneys, lenders, or insurance professionals.
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