Count openings, not panes
Enter the number of openings you intend to replace. Multiple panes inside one window are not separate openings. Mixed styles may need separate estimates to make the assumptions clear.
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Window replacementWindow replacement cost calculator
Estimate one replacement window or a whole-house project. Choose the opening count, frame, glazing and installation method to see window units, labor, disposal and a total planning range. US dollars; no email required.
Rates reviewed August 2026
See the illustrated project guide
Written and maintained byMantu Kumar
Evidence review4 August 2026
Calculation rulesRead the methodology
Quality standardEditorial policy
Window replacement estimate
No email · nothing sentA closer look at your project
See the difference between a window and its opening
A window quote needs to describe the product and the installation around it. These details explain why two quotes for the same opening count can differ.
The three detail views below enlarge parts of the same photograph. Use them with the planning checks. Photos are AI-generated illustrations, not installation instructions or actual claim records.
Choose insert or full-frame
An insert uses the retained frame; full-frame work involves the opening and surrounding finishes. Ask the installer to assess the existing frame rather than choosing only by price.
Match the specification
Compare frame material, glazing, window style and access. Ask which trim, flashing and finishing work is included, then compare the complete installed price.
Before comparing totals, ask for these details
- Window unit
- Manufacturer, series, size, frame and glazing
- Opening and access
- Insert or full-frame method; floor level and frame condition
- Finishing
- Interior/exterior trim, disposal and permit responsibility
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On this page
Replacement window estimates for 1, 5, 10 and 20 windows
These examples are calculated from this page's model, not surveyed contractor quotes. They assume vinyl double-hung windows, double glazing, one-story access and the national regional factor (1.00).
| Openings | Insert installation | Full-frame installation |
|---|---|---|
| 1 window | $975 – $2,060 | $1,325 – $2,730 |
| 5 windows | $4,155 – $7,820 | $5,905 – $11,170 |
| 10 windows | $8,130 – $15,020 | $11,630 – $21,720 |
| 20 windows | $16,080 – $29,420 | $23,080 – $42,820 |
How to check the 10-window insert example: windows $4,950–$8,000 + labor $3,000–$6,400 + disposal/permit allowance $180–$620 = $8,130–$15,020. The calculator initially uses two-story access, which raises its default estimate to $8,370–$15,532. Load a one-story example above to reproduce this table.
For a written comparison, match opening count, manufacturer and series, U-factor, solar heat gain rating, insert or full-frame work, flashing, trim, removal and permit responsibility.
Window glass replacement or a complete new window?
This calculator prices a complete window unit. A damaged pane or failed insulated glass unit may be a different repair if the frame and sash remain serviceable. Do not use a whole-window estimate as a glass-only quote.
Ask a glazier to identify the glass unit, dimensions, safety-glazing requirements and whether the sash can be reused. For frame rot, a changed opening or widespread water damage, ask for a full-frame assessment instead.
Insert versus full-frame
This single choice can change a quote by 40%, and it is often not spelled out.
An insert replacement fits a new window inside the existing frame. The trim, siding and interior finishes stay untouched, so it is quicker, cheaper and far less disruptive. It only works when the existing frame is square, level and sound — and it costs you a little glass area, because the new frame sits inside the old one.
A full-frame replacement strips everything back to the rough opening. It is the only correct option when the frame is rotten or out of square, and it is the only way to change the window size. It costs more and involves re-finishing inside and out.
| Window style | Unit price, typical |
|---|---|
| Single-hung | $400 – $650 |
| Double-hung | $495 – $800 |
| Picture / fixed | $420 – $700 |
| Garden | $493 – $900 |
| Casement | $560 – $950 |
| Bay or bow | $790 – $1,900 |
Frame material
Vinyl is the default for good reason: cheapest, low maintenance, and genuinely energy efficient. It cannot be painted and very dark colors can warp in strong sun.
Fiberglass costs roughly 40 to 60% more and expands and contracts at nearly the same rate as glass, which means seals last longer. It is the sensible upgrade if you plan to stay.
Wood looks best and demands the most — repainting or resealing every few years, and rot risk if it is neglected. Clad wood puts an aluminum or vinyl skin on the outside and wood on the inside, which solves most of that at a price.
Double or triple pane
Double pane with a low-E coating and argon fill is the sensible default across most of the country. Triple pane adds roughly 15 to 25% to the window cost and earns that back mainly in genuinely cold climates or where street noise is a problem. In a mild climate the payback period usually runs past the point where it stops being interesting.
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Rebates before tax credits
Federal energy efficiency credits have changed repeatedly and it is worth checking current IRS guidance rather than relying on a figure quoted in a sales pitch. State and utility rebates are separate, are often overlooked, and are frequently the larger of the two. The DSIRE database lists them by state.
What insurance covers
Broken glass from a covered peril — storm debris, a fallen branch, vandalism — is generally covered, subject to your deductible. Failed seals, fogging between the panes, rot and ordinary age are not. Since a single window replacement often costs less than the deductible, most window claims are not worth filing unless several are damaged at once.
The ACV and RCV difference applies here as it does everywhere else.
Window result summaryThe whole-house result depends on opening count and size, frame, glazing and whether the job is insert or full-frame. Compare flashing, trim, tempered-glass requirements, disposal, U-factor, SHGC and labor warranty before comparing totals.
Questions
How much does it cost to replace windows in a house?
In this calculator, ten vinyl double-hung, double-glazed inserts at one-story access and the national factor total $8,130–$15,020, including the disposal and permit allowance. Full-frame replacement totals $11,630–$21,720 under the same assumptions. These are model estimates, not local quotes.
What is the difference between insert and full-frame replacement?
An insert fits inside the existing frame, keeping trim and siding intact — cheaper and quicker, but only viable if the frame is sound. Full-frame strips back to the rough opening and is required when the frame is rotten, out of square, or the opening size is changing.
Are triple pane windows worth it?
In genuinely cold climates or noisy locations, often yes. Elsewhere the 15 to 25% premium takes a long time to pay back. Double pane with a low-E coating and argon fill is the sensible default for most of the country.
How long do replacement windows last?
Vinyl commonly reaches 20 to 30 years, fiberglass 30 to 40, and well-maintained wood 30 or more. The seal usually fails before the frame does — fogging between panes is the sign.
Does homeowners insurance cover window replacement?
Broken glass from a covered peril is generally covered. Failed seals, fogging and age are not. Because one window often costs less than the deductible, most single-window claims are not worth filing.
Do new windows qualify for a tax credit?
Federal energy efficiency credits have changed repeatedly, so check current IRS guidance rather than a figure from a sales pitch. State and utility rebates are separate and are frequently larger — the DSIRE database lists them by state.
Related
- Siding replacement — usually quoted at the same time as windows
- HVAC replacement — Section 25C expired for both
- Claim gap calculator — when one window is not worth claiming
- What insurance actually pays
Where these figures come from
Rates are cross-checked against 2026 published pricing from Homewyse, This Old House, Angi and Modernize. Homewyse puts basic replacement installation at $632 to $967 per window as of May 2026; This Old House reports unit prices from $397 for single-hung up to $886 for bay and bow. Depreciation is modeled straight-line against expected service life; carriers use
their own schedules and some cap payouts by age. These are ranges for planning, not quotes,
and nothing here is a coverage determination.
Evidence trail
Reviewed 4 Aug 2026Sources used to check this model
Primary public references anchor window technology, performance ratings and price movement. Calculator rates remain planning assumptions tested against published market ranges.
Product factorsDOE: Window types and technologies
Rating standardNFRC energy performance ratings
Price movementBLS Producer Price Index
These organizations do not endorse ReplaceCost. Local contractor quotes, permits and product specifications control the real result. See the full methodology for the source hierarchy and update process.