Window Replacement Cost Estimator
Estimate the total cost of replacing windows in your home based on window type, size, quantity, frame material, and installation complexity.
Formula
Cost per Window = (Base Material Cost × Size Multiplier × Frame Multiplier + Glazing Adder) + (Base Labor × Story Multiplier × Region Multiplier) + Disposal Cost
Project Subtotal = Cost per Window × Number of Windows
Grand Total = Subtotal + Permit Fee + Contingency (10%)
Estimated Range = Grand Total × 0.85 to Grand Total × 1.15
Energy Payback = Grand Total ÷ Annual Energy Savings
Assumptions & References
- Base material costs sourced from HomeAdvisor / Angi 2024 national averages: single-hung $300, double-hung $450, casement $500, bay/bow $1,500, skylight $900, egress $700.
- Size multipliers: Small ×0.80, Medium ×1.00, Large ×1.30, Oversized ×1.70.
- Frame multipliers: Vinyl ×1.00 (baseline), Aluminum ×1.10, Composite ×1.35, Wood ×1.45, Fiberglass ×1.55.
- Glazing adders per window: Single pane +$0, Double pane Low-E +$80, Triple pane +$180 (ENERGY STAR guidelines).
- Labor: Insert/retrofit ~$220/window; Full-frame ~$450/window (mid-market baseline).
- Story multipliers on labor: 1-story ×1.00, 2-story ×1.20, 3-story ×1.45 (scaffolding / lift costs).
- Regional labor multipliers: Low-cost ×0.85, Mid-cost ×1.00, High-cost ×1.35 (RSMeans 2024).
- Disposal: ~$25/window when selected (landfill + hauling fees).
- Permit fee applies to full-frame replacements only: $150 (1–5 windows), $250 (6–15), $400 (16+).
- Contingency of 10% accounts for unforeseen structural repairs, trim work, or caulking.
- Energy savings estimated at ~$35/window/year (double pane) and ~$55/window/year (triple pane) per U.S. DOE / ENERGY STAR data.
- Costs do not include interior/exterior trim painting, drywall repair, or custom window shapes.
- Estimates are for budgeting purposes only. Obtain at least three contractor quotes for accuracy.