Windows
Replacement, repair and glass, with what a thousand homeowners reported paying set against what the cost estimators model, and the gap explained rather than averaged away.
This section opened on 2 November 2026. It works the way the rest of the site does: every figure names the guide it came from and the date that guide was updated, and where sources disagree we show the disagreement instead of splitting the difference.
Windows are the first subject on this site where one publisher reports what people actually paid, from its own survey of a thousand customers, while the other models what the work should cost. Those two methods produce numbers $283 apart on the same product in the same year. Neither is wrong. We show both and say which question each one answers.
The eight questions so far
| Page | The short answer | What it adds |
|---|---|---|
| Window replacement cost | $517 a window surveyed, $800 modelled | a quantity table whose every row is one multiplication, printed under prose promising volume discounts |
| Window repair cost | about $400 | two publishers who genuinely differ, which on this site is the rarer and more useful case |
| Window glass replacement | $300 to $880, average $375 | an identical range and an identical average on two unconnected sites, neither of which says where it came from |
| Double or triple pane | $80 a window apart | a project total divided out so the two publishers can finally be compared, and what three in four buyers actually choose |
| Egress window cost | about $3,500 to $4,129 | the window is $100 to $700 of it; the rest is a hole in the ground, and the way the sash opens changes how big that hole must be |
| Bay window cost | $602 or $3,322 | two figures five times apart because one prices the window and the other prices the structural work around it |
| Window screen replacement | published average $317 | the survey underneath it, where the most common single answer was $500, with more responses than any other price |
| Skylight installation | about $1,500 to $1,900 | a published low of $647 that buys a tube light rather than a skylight, and a high-end example that is dearer per unit, not cheaper |
Where the numbers come from
Two publishers carry this section: This Old House, whose replacement figures come from its own 2026 survey of 1,000 window customers, and Fixr, which builds its ranges from pricing databases and contractors. Where a figure is surveyed we say so, and where a figure is unattributed we say that too, because on this subject the two behave differently even within the same publisher.
What connects this to the rest of the site
Windows are a heating and cooling decision as much as a building one. If you arrived here from our heating and cooling section, the glass package is the part of a window quote that touches your energy bill.
Questions answered
- How much does a bay window cost?Updated 2026-11-03This Old House's bay window guide (updated June 2, 2026) puts bay windows at about $602 on average per unit. Fixr's guide (updated August 29, 2025) puts bay window installation at $972 to $5,672 with a national average of $3,322. The gap is scope rather than disagreement: a bay window projects out from the wall, so fitting one is a structural job, and Fixr prices that job while This Old House prices the window in it.
- Double-pane or triple-pane windows: what each costsUpdated 2026-11-03This Old House's energy-efficient windows guide (updated November 2, 2026) prices double-pane windows at $529 each on average and triple-pane at $609, from its own homeowner survey, and reports that nearly 76% of people replacing windows for efficiency chose double-pane. Fixr's double-pane guide (updated March 3, 2026) prices the same two glazings per window installed at $479 to $872 and $654 to $1,190. So the step from two panes to three is $80 on the surveyed figures but $175 to $318 on the modelled ones, and the surveyed triple-pane average sits below Fixr's cheapest triple-pane window.
- How much does an egress window cost?Updated 2026-11-03Fixr's egress window guide (updated August 29, 2025) puts installation at $2,500 to $5,000 with a national average of $3,500. Bob Vila's guide (updated January 21, 2024) gives $2,621 to $5,662 with a national average of $4,129. On Bob Vila's own figures the window is $100 to $700 and fitting it $100 to $250, so the great majority of both totals is the excavation and the window well that a basement installation needs.
- How much does skylight installation cost?Updated 2026-11-04Fixr's skylight guide (updated January 31, 2025) puts installation at $1,080 to $1,966 with a national average of $1,523. Bob Vila's guide (updated August 30, 2024) gives $1,000 to $2,700 on average with a typical figure of $1,860. The averages are $337 apart and the ranges overlap across most of their length, so the band between the two published averages, $1,523 to $1,860, is the sound expectation for one skylight professionally installed.
- How much does window glass replacement cost?Updated 2026-11-02This Old House's glass guide (updated March 27, 2026) puts window glass replacement at $300 to $880 per window installed, with a national average of about $375. Fixr's guide (updated August 29, 2025) gives $300 to $880 with a national average of $375. The two are identical to the dollar, seven months apart, and neither page says where the figure came from. Treat it as one source rather than two, and note that the average sits near the bottom of the range rather than in the middle.
- How much does window repair cost?Updated 2026-11-02This Old House's window repair guide (updated June 23, 2026) puts repairs at $100 to $600 with a national average of $392. Fixr's guide (updated January 21, 2026) puts them at $150 to $600 with a national average of $400. The two are close but not identical, which on this subject is worth saying out loud, and the practical rule both arrive at is the same: repair while the damage is isolated, replace once it is widespread or getting worse.
- How much does window replacement cost?Updated 2026-11-02This Old House's window guide (updated August 11, 2026) reports $517 per installed window and $7,183 per project, from its own 2026 survey of 1,000 window customers nationwide. Fixr's guide (updated January 21, 2026) gives an average of $800 per window with a typical range of $450 to $1,200, built from pricing databases, licensed contractors and industry experts. The $283 gap is not a disagreement about windows. One number is what a thousand people reported paying, the other is what a cost model says the work is worth.
- How much does window screen replacement cost?Updated 2026-11-04This Old House's screen guide (updated June 5, 2026) puts window screen replacement at $317 on average, with a range of $147 to $515 per screen. Fixr's guide (updated August 29, 2025) gives $100 to $400 with an average of $200. The more useful figure is buried in This Old House's own survey of 1,000 homeowners: the most common single price people reported was $500, with more responses than any other figure, well above the average printed at the top of the page.