One quote may include full-frame replacement, exterior trim and disposal, while another may assume a simpler insert installation. Compare what is included before comparing the number.
Window size and operation affect price
Fixed windows, double-hung windows, casements, sliders and specialty shapes use different hardware and manufacturing complexity.
Frame and glass specifications matter
Vinyl, wood, fiberglass and composite frames have different cost and performance characteristics. Low-e coatings, gas fills and glazing packages also affect price.
Installation method can change the scope
Insert replacement can preserve more of the existing frame, while full-frame work can involve interior and exterior trim, flashing and water-management details.
Access and finish work add labor
Upper-story access, damaged openings, siding interfaces, interior trim and painting can increase the installed cost.
Measure the project consistently
Use the Square Footage Calculator for room and opening planning, and keep a window-by-window schedule so every contractor prices the same quantity and type.
Sources and further reading
- U.S. Department of Energy — Window Types and Technologies
- ENERGY STAR — Residential Windows, Doors & Skylights