How much does it cost to replace windows in a house?

Replacing a single window costs $400–$1,000 installed for standard sizes. A full home with 15–20 windows typically costs $8,000–$20,000. Custom or oversized windows, bay windows, and casement windows cost more than standard double-hung models.

Are new windows worth the investment?

New windows improve comfort, reduce drafts, and can lower energy bills by 10–25% in older homes. However, the payback period from energy savings alone is typically 15–25 years. The real value comes from comfort, noise reduction, and curb appeal — not pure energy ROI.

What type of windows are the most energy efficient?

Double-pane, low-E coated windows with argon gas fill are the standard for energy efficiency. Triple-pane windows offer marginally better performance at significantly higher cost — generally only worth it in extreme climates like Minnesota or Alaska.

Window Replacement Cost Guide 2026

May 22, 2026

When to Replace Windows

Windows typically last 20–30 years. Signs that replacement makes sense: visible condensation between the panes (failed seal), drafts you can feel with your hand near the frame, difficulty opening or closing, rot in wood frames, or significantly elevated heating and cooling bills in an older home.

If windows are structurally sound but just single-pane, adding interior window inserts or exterior storm windows is a lower-cost option — $100–$300 per window — that recovers most of the thermal benefit.

Window Replacement Costs by Type

Standard Double-Hung (Most Common): $400–$800 installed

Double-hung windows — where both sashes slide up and down — are the default choice for most homes. Standard sizes (24"x36" to 36"x60") with double-pane, low-E glass run $400–$800 installed. Premium brands (Andersen, Pella, Marvin) run $700–$1,200 for the same opening.

Casement Windows: $500–$1,000 installed

Hinged on one side and cranked open — they seal tighter than double-hungs when closed, giving slightly better air infiltration performance. Common in craftsman-style homes.

Bay and Bow Windows: $2,000–$5,000+ installed

Multi-pane assemblies that project outward from the home. Installation is significantly more complex (requires framing, roofing over the projection, and interior finishing). These add dramatic visual impact.

Skylights: $1,500–$4,000 installed

Fixed or vented skylights require roofing work and flashing in addition to the unit cost. Vented skylights (which open) cost $800–$1,000 more than fixed. Professional installation is strongly recommended — poor flashing is the leading cause of roof leaks.

Slider Windows: $400–$900 installed

Slide horizontally — common in contemporary and ranch-style homes.

Frame Material Comparison

Vinyl: Most popular, lowest maintenance, good thermal performance. $300–$700 per window.
Fiberglass: Strongest material, best for extreme climates, can be painted. $600–$1,200 per window.
Wood: Classic look, excellent insulation when maintained, highest maintenance. $700–$1,500 per window.
Aluminum: Strong and slim profiles, poor thermal performance. Best for commercial or contemporary aesthetics.
Composite (wood/vinyl hybrid): Interior wood look with exterior vinyl — best of both. $600–$1,100 per window.

What Drives the Total Cost

Number of windows: Volume discounts apply — replacing 15 windows costs less per window than replacing 3
Opening size: Non-standard openings may require custom units or framing modifications
Installation complexity: Second-floor windows or windows above rooflines require scaffolding
Interior trim work: Some installations disturb interior casings and require finish carpentry
Brand tier: Builder-grade vs. premium brands vary by $200–$600 per window

Energy Savings Estimates

Replacing single-pane windows with double-pane, low-E units can reduce heating and cooling loads by 10–25% in older homes. In a home spending $200/month on energy, that's $20–$50/month — roughly $250–$600/year. On a $12,000 window replacement, pure energy payback is 20–50 years. The broader value is comfort, noise, and curb appeal.

Browse home remodeling contractors near you to get window replacement quotes. Many contractors specialize in windows and offer better pricing than general remodelers for this specific project type.

Frequently Asked Questions

How much does it cost to replace windows in a house?: Replacing a single window costs $400–$1,000 installed for standard sizes. A full home with 15–20 windows typically costs $8,000–$20,000. Custom or oversized windows, bay windows, and casement windows cost more than standard double-hung models.
Are new windows worth the investment?: New windows improve comfort, reduce drafts, and can lower energy bills by 10–25% in older homes. However, the payback period from energy savings alone is typically 15–25 years. The real value comes from comfort, noise reduction, and curb appeal — not pure energy ROI.
What type of windows are the most energy efficient?: Double-pane, low-E coated windows with argon gas fill are the standard for energy efficiency. Triple-pane windows offer marginally better performance at significantly higher cost — generally only worth it in extreme climates like Minnesota or Alaska.