While the average cost of window replacement can range between $300 to $700 per window, cost variance depends on other factors including the type of windows, the condition of the existing frame, quality of materials, window size, and the number of windows involved. Window replacement is cheaper than adding new construction windows. This is because new window installation requires the window frames to be rebuilt. Another factor in any window replacement cost is the type of window pane you select. While single pane windows are the least expensive, spending more on other types of window panes can provide additional insulation or security. Some of these optional window panes include double, triple, tempered, and argon filled panes. Speccial energy efficient options are also available. And while these may increase the initial cost, they will prove a great investment in saved money spent on heating with time passing by. Overall, window replacement cost in a typical three-bedroom, single-story home with 10 windows can vary from $3,000 to $7,000.