Egress Window Installation Cost Calculator
An egress window is about $4,696 for one opening through a poured concrete foundation in Atlanta, with its well — $4,493 in block, and $2,680 in a timber wall above ground level where there is no well at all. ⚠️ The window is the small half: this needs 7.31 square feet of hole to give 5.7 square feet of clear escape passage, which is 10.9 linear feet of sawing through a structural wall. And a basement with two bedrooms needs 3 of them, not one.
Estimate the cost for your home
Estimated cost of the escape opening
$4,846
typical · range $3,154 to $6,538 · 1 opening · 7.31 sq ft of hole · 10.9 ft of cutting
$4,846 for one opening through poured concrete foundation, with its well. ⚠️ The window is the small half: this needs 7.31 sq ft of hole cut to give 5.7 sq ft of clear escape passage, which is 10.9 linear feet of sawing through a structural wall, plus a well outside big enough to climb out of and drained so it does not fill.
Labour priced at national wages. Enter a ZIP code to price it for your area. 71% of this figure comes from modelled material, plant and disposal — each line shows its own uncertainty.
Priced from bls.gov Aug 2026fema.gov Aug 2026how every line is sourced
The one input that changes the answer for you.
1 / 5
The figure above is already calculated. Each step just makes it more yours, and you can stop at any of them.
The three minimums apply at once, and the two small ones do not add up to the big one
This is the arithmetic that decides whether the window you were going to fit qualifies, and it is the part nobody sets out.
| Clear escape passage, below ground level | 5.7 sq ft |
|---|---|
| Minimum clear width, and minimum clear height | 20 in · 24 in |
| ⚠️ What those two minimums give you together | 3.33 sq ft |
| So at the minimum width, the height you actually need | 41 in |
| And at the minimum height, the width you actually need | 34.2 in |
| Highest the bottom of the clear opening may sit above the floor | 44 in |
20 inches by 24 is 3.33 square feet, and the requirement is 5.7 — so a window can meet both of the small numbers and still be nowhere near legal. That is the trap, and it is why an ordinary basement window that looks about the right size almost never qualifies. ⚠️ These figures are what two municipal building departments publish for their own jurisdictions; the underlying document is the International Residential Code, which belongs to the ICC and is not reproduced here. Your local code is the one that decides, and the numbers above are worth checking against it before anybody orders a window.
What the code measures is the hole you can crawl through, not the window
| Window | Hole needed | Cutting | Total |
|---|---|---|---|
| Casement — one leaf, swings right out78% of the opening is clear passage | 7.31 sq ft | 10.9 ft | $4,846 |
| In-swing hopper — hinged at the bottom56% of the opening is clear passage | 10.18 sq ft | 12.9 ft | $5,040 |
| Slider — two leaves, one moves40% of the opening is clear passage | 14.25 sq ft | 15.3 ft | $5,035 |
| Single-hung — the lower leaf lifts⚠️ Needs 53.3 in of opening height to give 24 in of clear height | — | — | ⚠️ will not fit |
A slider needs 95 per cent more hole than a casement to give the same clear passage, because only one of its two leaves ever opens. ⚠️ And here is what surprised us when we ran it: that barely changes the price. Sawing is charged by the perimeter of the hole, and a perimeter only grows with the square root of the area — 95 per cent more area is only 40 per cent more cutting, which costs about what the cheaper window saves. Choose on the opening, not on the price. Where the type does decide something is the row with no number in it: a single-hung only opens half its height, so it needs an opening over four feet tall just to give 24 inches of clear height — and a basement wall does not have that between the sill line and the ground outside.
| Line item | Qty | Cost | Source |
|---|---|---|---|
| Casement egress window1 per opening | 1each | $480–$1,150 | estimated±41% |
| Wet-cutting the opening in poured concretecut perimeter × openings | 10.9linear ft | $283–$741 | estimated±45% |
| Propping, cutting out and breaking away the opening(cut ft × wall rate × 0.62 + 3.5 h) × openings | 9.24hour | $536–$576 | sourced |
| Lintel or header over the opening(span + bearing) × openings | 4.5linear ft | $144–$396 | estimated±47% |
| Mini excavator for the window wellyards × 1.6 h + 1 h, with machine access | 2.87hour | $164–$164 | sourced |
| Digging out, trimming and backfilling the well(1.6 h + yards × 1.9) per well × access | 3.82hour | $168–$181 | sourced |
| Operating the excavatorsame as machine hours | 2.87hour | $160–$172 | sourced |
| Window well, up to four feet deep1 per well up to 44 in deep | 1each | $240–$610 | estimated±44% |
| Draining the well1 per well | 1each | $180–$620 | estimated±55% |
| Well cover or grate1 per well when covered | 1each | $95–$380 | estimated±60% |
| Hauling away spoil and the cut-out wallwell yards + the cut-out piece | 1.47cu yd | $62–$154 | estimated±43% |
| Flashing, sealing, trimming and making good1 per opening | 1each | $210–$640 | estimated±51% |
| Fitting, flashing and finishing5.5 h per opening | 5.5hour | $311–$334 | sourced |
| Permit, drawings and inspection1 when permitted and there is work | 1each | $120–$420 | estimated±56% |
| Total | $3,154–$6,538 | ±35% |
Where these numbers come from
- The three minimums apply at once, and the small ones do not add up
- This is the arithmetic that decides whether the window somebody is about to order qualifies, and it is missing from almost every page on the subject. Below ground level the clear escape passage has to be 5.7 square feet, the clear width at least 20 inches and the clear height at least 24. But 20 by 24 is only 3.33 square feet, so meeting both of the small numbers gets you barely half way. At the minimum width the opening has to be 41 inches tall; at the minimum height it has to be 34.2 inches wide. ⚠️ Those figures are the ones Boulder County, Emergency Escape and Rescue Openings (B10) and City of Bismarck, building and development FAQs publish for their own jurisdictions, read on 2026-08-25 and agreeing with each other. The underlying document is the International Residential Code, which belongs to the ICC and is neither reproduced nor derived here; the arithmetic above is ours, and your local code is what decides.
- The window type changes the hole a lot and the price hardly at all
- What has to be measured is the passage with the window fully open, so how the window opens decides how big the hole must be. A casement swings its whole leaf clear and needs 7.31 square feet of opening; a slider only ever opens half its width and needs 14.25 — 95 per cent more. ⚠️ We expected that to be the expensive mistake and the model says it is not: the three that fit come out within a few per cent of each other. The reason is geometric and worth knowing — sawing is charged by the perimeter of the hole, and a perimeter grows only with the square root of the area, so 95 per cent more area is 40 per cent more cutting, which costs about what the cheaper window saves. Where the type really decides something is the row with no price in it: a single-hung opens only its lower half, so it needs 53.3 inches of opening to give 24 inches of clear height, and a basement wall does not have that between the sill line and the ground outside. It is fine upstairs and it is usually impossible down there.
- How many, which is the question that costs the most to get wrong
- “Does every basement room need an egress window?” is asked on this search and the answer corrects the question. The requirement attaches to the basement itself and to every room used for sleeping, not to every room. So a basement with a family room, a bathroom and nowhere to sleep needs 1 — $4,696. One bedroom and no outside door needs 2, at $9,018. Two bedrooms needs 3, at $13,340. ⚠️ And a basement that already has its own walkout door has satisfied its own requirement, which takes one opening off the count — a basement with a walkout and no bedrooms needs none at all. That is the difference between a quote and a surprise, and it is why this figure belongs beside our basement finishing page rather than inside it.
- The well is the other half, and the drain is what gets left out
- Below ground the opening is only half the job. The well outside has to be at least 9 square feet with a projection and width of at least 36 inches, so it is bigger than the window in every direction, and past 44 inches deep it needs a permanently fixed ladder or steps usable with the window fully open — $4,712 at 44 inches against $5,608 at 48, because a deep well is a different product as well as more digging: at that depth it is retaining soil against your foundation rather than keeping it off the glass. ⚠️ The line that gets left out of cheap quotes is the drain. A window well that does not drain is a bathtub built against a hole you have just cut in your foundation, and it empties through the window. Two more things worth naming before you ask for a price: whether a machine can reach that wall at all, because digging a well by hand is roughly three times the hours, and whether there is anywhere for the well to go — a property line, a paved drive or a buried service on the outside of that wall is invisible from the basement and decides everything. Labour is official: wages from BLS OEWS for brickmasons, carpenters, construction labourers and equipment operators, May 2025, retrieved 2026-08-20, benefit-loaded from BLS ECEC, with machine time at published FEMA rates. Every estimated band is on the dataset page, the approach on the method page, and the same opening in a garage being turned into a bedroom is priced within our garage conversion page.
- Material prices
- Modelled estimates, not sourced prices. No public, machine-readable source of US residential material prices exists, and we would rather say so than pretend otherwise. Each line carries its own uncertainty band. How we estimate them.
Contractor overhead and profit applied at 33–43% over direct cost. Data last reviewed 2026-08-25.
What this figure does not include
- Finishing the basement around it
- Framing, insulation, drywall, flooring and the rest of turning a basement into rooms is priced whole on our basement finishing page, which now takes its egress window figure from this model rather than carrying one of its own.
- What it does to an appraisal
- ⚠️ Two of the four questions Google shows on this search are about value, and this page does not answer them with a number. There is no federal series for what a legal bedroom adds to a house, it varies by market more than almost anything else in property, and inventing a figure would be worse than leaving it out. What is publishable is the other half: what it costs, and the fact that without this opening the room is not a bedroom no matter what it is furnished as.
- Structural engineering where the wall needs it
- A wide opening, a wall carrying a point load, or a foundation already moving is a case for an engineer’s drawing rather than a standard lintel. The permit will usually say so, and it is money well spent — the alternative is finding out afterwards.
- Whether the ground outside will let you
- ⚠️ A well needs somewhere to go. A property line, a paved drive, a neighbour’s wall or a buried service on the outside of that wall can make one position impossible and another expensive, and none of that is visible from inside the basement. It is the first thing to check and it is not in this figure.
- The code itself
- The minimum dimensions are set by the International Residential Code, which is a copyrighted document published by the ICC and is not reproduced or derived here. The figures on this page are the ones two municipal building departments publish for their own jurisdictions, said in our own words, and the arithmetic that follows from them is ours. Your local code decides.
Questions people actually ask
Does every basement room need an egress window?
No — and the difference is worth money. ⚠️ The requirement attaches to the basement itself and to every room used for sleeping, not to every room. A basement with a family room, a bathroom and no beds in it needs 1, at $4,696. One bedroom and no outside door needs 2 — one for the bedroom and one for the basement — at $9,018. Two bedrooms and no outside door needs 3, at $13,340. And if the basement already has its own walkout door, that satisfies the basement's own requirement and one opening comes off the count.
Do I need a permit to install an egress window?
Essentially always, and this is not the line to save on. Cutting a hole through a load-bearing wall is structural work, and an escape opening is life safety — two separate reasons a building department wants to see it. ⚠️ The practical argument is stronger than the legal one: the permit is what later proves the room is a bedroom. Unpermitted egress work is exactly what a buyer's inspector and an appraiser look for, so the few hundred dollars saved gets spent again the day the room stops counting as a bedroom. On this model the permit and inspection are a small fraction of $4,696.
Is adding an egress window add value?
⚠️ This page will not put a number on that half, and the reason is the same one that keeps every other figure here honest: what an extra legal bedroom adds to a house varies by market more than almost anything else in property, there is no federal series for it, and inventing a figure would be worse than leaving it out. What is publishable is exact and it is the part that actually decides things — without this opening the room is not a bedroom. An appraiser will not count it, a listing cannot call it one, and a buyer's inspector will say so in writing. So the question is not really what the window adds; it is what a bedroom is worth where you live, minus the $4,696 that turns the room into one. The second number is on this page and the first one is not ours to guess.
Is it worth it to install egress windows?
Where a room is being slept in, the question does not really arise: it is required, and the reason has nothing to do with money — it is the way out of a basement when the stairs are the thing that is on fire. ⚠️ Where the question is real is on the rest of the decision, and there the useful answer is about how many. The requirement attaches to the basement itself and to every sleeping room, so a family room and a bathroom downstairs need 1 between them at $4,696, while two bedrooms need 3 at $13,340 — and a basement that already has a walkout door needs one fewer. The cheapest version of the answer is often to put the beds where the openings can go, which is a decision worth making before the walls are framed rather than after.
Taken from Google’s “people also ask” results for this search on 2026-08-25, not invented.
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