Window Installation Cost Estimator
Estimate the total cost of window installation including materials and labor based on window type, dimensions, quantity, and regional labor rates.
Formula
Material Cost/Window = Base Cost ($/sq ft) × Window Area (sq ft) × Frame Multiplier × Glazing Multiplier
where Window Area = (Width ÷ 12) × (Height ÷ 12) in sq ft
Labor Cost/Window = Base Hours × Story Multiplier × Labor Rate ($/hr)
Base Hours adjusted for removal (+0.75 hr) and trim (+0.5 hr)
Supplies/Window = max($25, min($60, Area × $4))
Disposal = $15/window (if replacing existing windows)
Subtotal = (Material + Labor + Supplies + Disposal) × Quantity
Grand Total = Subtotal × 1.15 (contractor overhead & profit)
Cost Range = Grand Total × [0.85, 1.15]
Assumptions & References
- Base material costs per sq ft: Single-Hung $12, Double-Hung $16, Casement $20, Sliding $14, Bay/Bow $35, Picture $10, Skylight $28 (HomeAdvisor / Angi 2024 national averages).
- Frame multipliers: Vinyl 1.0×, Aluminum 1.2×, Composite 1.45×, Wood 1.55×, Fiberglass 1.65× (Modernize.com 2024).
- Glazing multipliers: Single pane 0.8×, Double pane Low-E 1.0×, Triple pane 1.35× (EnergyStar / NFRC guidance).
- Labor hours per window include measuring, fitting, sealing, and cleanup; multi-story work adds 25–50% for scaffolding/equipment.
- Contractor overhead and profit margin of 15% is typical for residential remodeling (NAHB 2023 Cost of Doing Business Study).
- Disposal fee of $15/window assumes standard landfill tipping fees; hazardous materials (lead paint) may increase this cost.
- Estimates do not include structural modifications, permits, painting, or custom/specialty glazing upgrades.
- Cost range of ±15% reflects regional price variation, seasonal demand, and contractor pricing differences.
- Minimum material costs applied per window type to reflect real-world pricing floors regardless of small dimensions.