A compiled reference of 20 verified statistics on residential window replacement costs in the United States: what it costs per window and for a whole home, how price breaks down by frame material, glass package, and window style, and how much energy-efficient windows save. Every figure is drawn from a named source, Fixr, This Old House, and ENERGY STAR, and independently checked against the original before publishing.
Window cost by frame material
Average cost per installed window by frame material (This Old House).
Source: This Old House (thisoldhouse.com). Bars scaled to the $564 fiberglass leader.
Key statistics
Key takeaways
Window cost is best understood per window, because that is how it is bought and priced. The numbers below trace the per-window and whole-home cost, the breakdown by frame, glass, and style, and the energy payoff.
A single window averages about $517 to $800 installed.
A whole-home project (about 7 windows) averages around $7,183.
Aluminum and vinyl frames are cheapest; fiberglass and wood priciest.
Triple-pane glass costs more than double-pane ($609 vs $529).
ENERGY STAR windows cut energy bills up to 13% (replacing single-pane).
Bay windows are the priciest style, up to $4,500 each.
How we built this report
Every figure was compiled in September 2026 from named sources and verified against the original before publishing.
- Compiled from named cost and authority sources
Per-window, frame, glass, and style costs from This Old House and Fixr; the energy-savings figure from ENERGY STAR, the EPA/DOE program.
- Two cost guides, shown together
Where the two guides frame cost differently (per-window average versus range), we show both so the real spread is visible.
- Only explicitly stated figures
We include only numbers a named source states directly, and attribute each inline at the point it appears.
- Independent review
Written by one co-founder, reviewed by the other before publishing.
Scope note: these are national averages and ranges from consumer cost guides and vary widely by frame, glass, style, size, and region; they are directional, not quotes. This page covers window replacement; for window repair in rental units, see our separate rental window repair research, linked below. The ENERGY STAR savings figure is a national average and varies by climate and the windows being replaced.
Window replacement, by the numbers
All 20 figures, grouped into three themes, each from a named source and independently verified against the original.
What window replacement costs
The two leading cost guides put a single installed window in the same neighborhood. According to This Old House (thisoldhouse.com), a window averages $517 installed, and Fixr (fixr.com) puts it at $800 with a range of $300 to $3,000.
Statistic 1
A window costs about $517 per installed window on average.
This Old House
Statistic 2
Window replacement averages about $800 per window, ranging $300 to $3,000.
Fixr
Statistic 3
Most window replacements fall between $450 and $1,200 per window.
Fixr
Statistic 4
A whole-home window project costs about $7,183 in total.
This Old House
Statistic 5
The average project replaces seven windows, and 94% of homeowners were satisfied with the result.
This Old House
What this means: Windows are the rare exterior project priced per unit, which makes the per-window number the one that travels between properties. For a rental or hotel operator, that means a phased approach is easy: the cost of doing five windows now and five later is close to linear, unlike a fence or driveway where mobilization dominates.
Cost by frame and glass
Frame material and glass package are the two biggest cost levers. According to This Old House (thisoldhouse.com), frames run from aluminum at $453 to fiberglass at $564 per window, and each added pane of glass adds cost.
Statistic 6
Aluminum frames are the cheapest, about $453 per installed window (Fixr: $200 to $800).
This Old House / Fixr
Statistic 7
Vinyl frames average about $472 per window (Fixr: $350 to $800).
This Old House / Fixr
Statistic 8
Composite frames average about $513 per window.
This Old House
Statistic 9
Wood frames average about $544 per window (Fixr: $600 to $2,000).
This Old House / Fixr
Statistic 10
Fiberglass frames are the most expensive average, about $564 per window (Fixr: $400 to $1,500).
This Old House / Fixr
Statistic 11
Single-pane glass averages $400, double-pane $529, and triple-pane $609 per window.
This Old House
What this means: The frame decision is a durability-and-look tradeoff more than a huge cost swing (about $110 between the cheapest and priciest average). Vinyl is the low-maintenance default for rentals; fiberglass and wood cost more for a premium look and feel. The glass package is where energy performance is bought, which the next section quantifies.
Cost by style, and the energy payoff
Style sets the widest cost range, and the glass upgrade is what pays back on the utility bill. According to Fixr (fixr.com), styles run from single-hung to bay windows, and per ENERGY STAR (energystar.gov), certified windows cut bills up to 13% when replacing single-pane.
Statistic 12
Single-hung windows are the cheapest style, about $474 (Fixr: $250 to $700).
This Old House / Fixr
Statistic 13
Double-hung windows average about $551 (Fixr: $300 to $1,000).
This Old House / Fixr
Statistic 14
Casement windows average about $529 (Fixr: $400 to $1,200).
This Old House / Fixr
Statistic 15
Sliding ($531), picture ($540), and awning ($545) windows cluster in the mid-range.
This Old House
Statistic 16
Bay windows are the priciest style, up to $4,500 each (Fixr: $900 to $4,500).
Fixr
Statistic 17
Glass block windows average about $505 each.
This Old House
Statistic 18
ENERGY STAR certified windows lower household energy bills by an average of up to 13% nationwide when replacing single-pane windows.
ENERGY STAR
Statistic 19
Upgrading from double-pane to triple-pane adds about $80 per window ($529 to $609).
This Old House
Statistic 20
Across both cost guides, aluminum and single-hung are the cheapest choices; bay windows and premium frames the most expensive.
This Old House / Fixr
What this means: Style drives the widest cost range (a bay window can cost six times a single-hung), while the energy payoff comes from the glass, not the frame or shape. For an operator, the highest-return move is usually replacing failed single-pane windows with efficient double-pane units, capturing the up-to-13% bill reduction, rather than paying up for premium shapes. Drafty, fogged, or hard-to-operate windows are also a visible, documentable condition issue that affects guest comfort and reviews.
Cite this study
Academic or press use: copy a ready-made reference. RapidEye is the publisher.
Quick FAQ
How much does it cost to replace a window?
Replacing a single window averages about $517 to $800 installed, according to This Old House (thisoldhouse.com) and Fixr (fixr.com), with a typical range of roughly $450 to $1,200 and a full range of $300 to $3,000 depending on frame, glass, and style. A whole-home project of about seven windows averages around $7,183.
What is the cheapest window frame material?
Aluminum and vinyl are the least expensive frames: This Old House (thisoldhouse.com) puts aluminum at about $453 and vinyl at $472 per installed window, versus $544 for wood and $564 for fiberglass. Fixr (fixr.com) shows a similar order, with aluminum and vinyl at the low end and wood the highest.
How much do energy-efficient windows save?
ENERGY STAR certified windows lower household energy bills by an average of up to 13 percent nationwide when replacing single-pane windows, according to ENERGY STAR (energystar.gov). Triple-pane glass costs more than double-pane (about $609 versus $529 per window) but improves insulation further.
How much does it cost to replace all the windows in a house?
A whole-home window replacement averages about $7,183 for roughly seven windows, according to This Old House (thisoldhouse.com). Cost scales with the number of windows and the frame, glass, and style chosen, so a per-window figure is the most portable way to estimate a specific home.
Data sources
Every figure traces to one of these named sources, each checked against the original before publishing. We name each source and show its root domain, but do not hyperlink external sources; internal links stay live.
This Old HouseWindow replacement cost by frame, glass, and stylethisoldhouse.com
FixrWindow replacement cost datafixr.com
ENERGY STAR (EPA / DOE)Energy savings from certified windowsenergystar.gov