Window replacement costs in 2026 run $400–$900 per window installed for standard double-hung windows, with the total project cost heavily influenced by window count, material choice, and installation complexity. A whole-house window replacement on a typical 2,000 sq ft home with 15–20 windows runs $7,500–$18,000 installed. Premium windows (Andersen 400 series, Pella Architect, Marvin Elevate) add 30–60% to these figures.
Vinyl frames dominate the replacement window market due to their low maintenance, good thermal performance, and competitive pricing. Quality varies significantly — budget vinyl windows from big-box retailers ($150–$250/window supply-only) are not the same product as premium vinyl from Simonton, MI Windows, or Harvey. Always compare U-factor and solar heat gain coefficient (SHGC) ratings, not just price.
Fiberglass has emerged as the premium mid-range option, offering superior dimensional stability (it expands and contracts at nearly the same rate as glass), excellent thermal performance, and the ability to be painted. Milgard Tuscany, Andersen 100 Series (Fibrex), and Pella Impervia are leading options. Particularly well-suited to climates with extreme temperature swings.
Traditional wood windows and modern clad-wood options (wood interior, aluminium or fiberglass exterior) are the premium segment. Andersen 400 Series and Marvin Elevate represent the most specified products in this category. Wood windows require more maintenance but offer the warmest aesthetic, particularly in older homes where maintaining original character matters for resale.
The IRA's Energy Efficient Home Improvement Credit provides a 30% credit up to $600 for qualifying exterior windows and skylights. To qualify, windows must meet Energy Star's "most efficient" tier — a U-factor of 0.20 or below and SHGC of 0.22 or below in northern climates (requirements vary by climate zone). This credit is per year and resets annually through 2032.
In practical terms, the energy savings from window replacement are often overstated in contractor pitches. Switching from single-pane to double-pane windows delivers meaningful savings ($125–$465/year according to the DOE); upgrading from a 2000s-era double-pane to a modern low-e triple-pane delivers more modest savings ($50–$150/year) relative to the additional cost.
Window replacement makes strong financial sense when: existing windows are single-pane, have failed seals (fogged glass indicates seal failure), have rotted frames, or are difficult to open/close. It makes weaker financial sense purely as an energy upgrade if your existing windows are already double-pane from the 2000s or later — payback periods for the energy savings alone can exceed 25 years. The strongest case for replacement is when appearance, functionality, or security are also factors alongside energy performance.