Replacement windows cost anywhere from $300 to $1,000 per window, depending on the size, material, and energy-efficiency rating. Vinyl windows are more affordable, while wood or fiberglass options can increase the price. Professional installation, which ensures the windows are properly sealed and fitted, adds $100 to $300 per window, contributing to the overall cost.

Costs for replacement windows vary by material, with vinyl being the most budget-friendly option. High-performance windows that improve energy efficiency tend to cost more but offer savings in the long run. Professional installation is crucial to ensure that the windows are securely fitted, preventing potential air leaks, drafts, and water infiltration, which can lead to additional expenses down the road.