The two published figures
| Source | Range | Typical figure | Updated |
|---|---|---|---|
| Fixr | $1,080 to $1,966 | $1,523 | January 31, 2025 |
| Bob Vila | $1,000 to $2,700 | $1,860 | August 30, 2024 |
The averages are $337 apart, our subtraction, and the ranges share their whole lower half. Bob Vila's ceiling is higher, which is the usual shape when one source allows more for difficult installations.
Our reading, marked as ours. This is a well-behaved pair by the standards of this site. Two publishers, roughly a year apart, reaching figures that differ by less than a fifth and overlapping heavily. Where we would land: between the two published averages, $1,523 to $1,860, for one skylight professionally installed in an ordinary roof. We are deliberately not rounding that into a tidier band, because the two figures are the evidence and a rounded one would look like a third source. Bob Vila names size, placement and type as what moves it from there.
The published low is not a skylight
Fixr's low end is $647, and the page says what it buys: a reflective tube light with no added features in a windowless powder room.
Our reading, marked as ours, and it matters because this figure will be quoted at you. A tubular daylight device is a reflective shaft that pipes light down from the roof. It is a good product and it is genuinely cheaper, but it is not a skylight: you cannot see out of it, it does not open, and it does not light a room the way a glazed opening does. If a quote comes in near $647, check which of the two you are being sold.
Fixr prices the materials for the three types separately, and the gap is the same story: tubular units run $229 to $417, fixed units $295 to $537, and ventilating units $574 to $1,044.
Our note. Those are materials only. Set the top of that span, about $1,044 for a ventilating unit, against the installed averages above, and most of what you pay is still the work of opening the roof and making it watertight. That is the right way round: the roof is the risk, not the glass.
What the labor actually is
Fixr gives labor at $271 to $493.
Our reading, marked as ours. Compare that with the averages and something becomes clear: labor as Fixr counts it is a minority of the bill, which means the rest is the unit plus everything around the opening, flashing and finishing. A quote that lists only a unit price and a labor rate has not accounted for the whole job, and the missing middle is usually the flashing kit and the interior finishing of the shaft, which on a deep roof or an attic can be a carpentry job in itself.
This is also the reason we would not treat a skylight as a do-it-yourself project on a roof you intend to keep dry. Everything expensive about a skylight that goes wrong is a water problem.
Doing several at once
Fixr's high end is $13,582 to install six skylights of its highest specification. That is $2,264 apiece, our division, which is above its own single-skylight ceiling of $1,966.
Our observation, marked as ours. So on this publisher's own figures, doing six does not bring the per-unit price down; the high-end example is dearer per skylight than the standard one. That is the opposite of the volume discount buyers tend to assume, and it is worth noting because we found the opposite assumption baked into a quantity table on our window replacement page, where every row was the single-unit price multiplied out. Neither table is evidence about your project. Ask your installer what the second and third units cost, rather than assuming either direction.
Where a skylight sits among window decisions
A skylight is the one opening on this site where the surrounding structure is a roof rather than a wall, and that changes the risk rather than only the price.
Our view. If your reason is daylight in a dark room, the comparison worth running is not between skylight brands but between a skylight and the cheaper interventions: a tube light at Fixr's low end, or a larger or additional wall window where the room has an exterior wall, which our window replacement page prices. If your reason is ventilation, the ventilating unit is the one to specify, and it is the dearest of the three material categories above.
What to take from this
- Budget between the two published averages, $1,523 to $1,860, for one skylight professionally installed.
- $647 buys a tube light, not a skylight. Check which you are being quoted.
- Ventilating units cost roughly twice a fixed unit in materials. Decide whether it needs to open.
- Most of the bill is the opening, not the glass. Flashing and interior finishing are where quotes differ.
- Do not assume a discount for several. The published high-end example is dearer per unit, not cheaper.
Sources
- Fixr, How Much Does It Cost to Install or Replace a Skylight?, updated January 31, 2025 (the $1,080 to $1,966 range and $1,523 national average, the $647 low for a reflective tube light, the $13,582 high for six skylights, and the labor figures)
- Bob Vila, Skylight Installation, updated August 30, 2024 (the $1,000 to $2,700 average range and the $1,860 typical figure, and the factors it names as moving the price)
Price figures are national US ranges from the sources above as of the date shown. Your local price depends on labor rates, permits and site conditions. Read how we get our numbers.