Skylight Cost Installed Per Window
A skylight is priced twice. Once for the unit you carry out of the store, and once for everything that has to happen around it: flashing that matches your roofing, a curb or a framed opening, a shaft through the attic, and a finished reveal inside the room. Homeowners who budget only the retail price of the unit are routinely surprised by the installed total, so it is worth seeing the whole number before the ladder comes out.
The four numbers that make up the price
Almost every skylight quote decomposes into the same four lines, and the unit itself is usually the smallest of them.
Flashing kits are not optional and they are not universal. A kit for an asphalt shingle roof cannot be substituted on a metal roof, and a deck-mounted unit sitting directly on the sheathing uses a different kit than a curb-mounted unit sitting on a framed box. Buying the wrong one costs more than buying the right one, because the difference shows up as a leak.
Cost by size
Standard stock sizes are dramatically cheaper than custom openings, because the unit is mass produced and the flashing kit already exists. The sizes below are typical for the US market.
| Nominal size | Typical room | Unit price | Installed, fixed | Installed, venting |
|---|---|---|---|---|
| 14 in. tubular | Bathroom, hallway, closet | $200-$450 | $500-$1,000 | Not applicable |
| 2 ft x 2 ft | Bathroom, stairwell, small bedroom | $250-$600 | $1,000-$1,800 | $1,600-$2,600 |
| 2 ft x 4 ft | Bedroom, kitchen, home office | $400-$900 | $1,500-$2,500 | $1,800-$3,000 |
| 3 ft x 3 ft | Living room, large bedroom | $700-$1,400 | $2,000-$3,200 | $2,600-$4,000 |
| 4 ft x 4 ft or custom | Great room, vaulted space | $1,500-$4,000 | $3,500-$8,000+ | $4,500-$9,000+ |
Fixed, vented, or tubular
The type you choose changes both the price and the reason you are buying the skylight in the first place. Fixed units are about daylight and nothing else. Vented units are about daylight plus stack ventilation, which matters most in a room that overheats. Tubular units are about moving light into a small dark space at the lowest possible cost.
| Type | How it operates | Installed cost | Best for |
|---|---|---|---|
| Fixed | Sealed, no moving parts | $1,000-$2,500 | Daylight only; the fewest leak and maintenance points |
| Manual venting | Pole crank or hand crank | $1,800-$3,200 | Rooms where you will actually reach the crank, typically under 10 ft of ceiling height |
| Electric venting | Wall switch, remote, or thermostat | $2,500-$4,000 | High ceilings, hard-to-reach locations, automated ventilation |
| Solar-powered venting | Integrated panel, no house wiring | $2,200-$3,600 | Avoiding the cost of running a circuit to the skylight |
| Tubular | Sealed tube with a diffuser at the ceiling | $500-$1,200 | Small spaces where a full-size shaft is impractical |
Why the roofing material changes the labor
The roof work is where quotes diverge most, because the flashing detail is different for every roofing system. On asphalt shingles a standard step or kit flashing blends into the courses and adds roughly $300 to $600 of labor. On standing seam metal the installer has to either match the rib spacing with a manufactured flashing or build a curb, which typically adds $500 to $1,200 and sometimes requires a cricket on the upslope side so water splits around the opening. Clay and concrete tile add $700 to $1,500 because tiles have to be lifted carefully and re-set. Low-slope TPO or EPDM roofs require a curb-mounted unit, adding roughly $600 to $1,200, and natural slate is the most expensive at $1,000 to $2,000 or more because every piece around the opening is hand-cut.
Costs that appear after the roof is closed
- Interior shaft. A short shaft in an accessible attic may need only a painted reveal. A deep or vaulted shaft needs framing, drywall, corner bead, and paint, which can run $500 to $1,500.
- Blinds and shades. Factory shades for heat and glare control are typically $150 to $500 per unit and are far cheaper to order with the skylight than to retrofit.
- Control wiring. An electric venting unit needs power and, for some models, a low-voltage control line. If the attic is finished or the run is long, this is a real line item.
- Deck repair. Any rotted sheathing discovered around the opening is additional carpentry at roughly $75 to $150 per sheet installed.
Ways to spend less without cutting corners
Stay in stock sizes. Group two or more skylights into one visit so the contractor's setup, lift, and travel are shared. Choose solar-powered venting instead of electric when the only reason for power is the vent motor, which avoids a circuit. Use a tubular unit for bathrooms and closets where a full shaft would be awkward. And above all, install the skylight during a planned roof replacement, when the roofing is already open and the marginal cost is genuine labor rather than an extra mobilization.
Do skylights add value?
They are not usually counted among the high-return remodeling projects the way a kitchen or a garage door is, but they solve a problem buyers notice: rooms that feel dark. Modern dual-pane units with a low-emissivity coating and argon fill perform far better than the 1980s single-glazed domes that gave skylights a reputation for heat gain and winter condensation. If you are already weighing a roof project, compare the skylight against another option first using the Metal Roofing Calculator, and confirm the roof geometry with the Roof Pitch Calculator. More tools are listed on the roofing calculators index.