Skylight installation costs $1,500 to $5,000 for a new opening in 2026, with most homeowners paying $2,000–$3,500 for a standard fixed or vented unit on an asphalt-shingle roof. Replacing an existing skylight in a working opening runs $800–$2,400 because the roof structure and flashing framework already exist. Those ranges include the skylight unit, roofing labor, flashing, and basic interior trim. They do not include the light shaft, which is where the real cost surprise lives.
Ceiling type is where most homeowners get surprised. A skylight on a vaulted ceiling drops straight through the roof into the room — one surface, no tunnel. A skylight on a flat ceiling with an attic above requires building a framed shaft from the roof opening down through the attic to the ceiling plane, then insulating, drywalling, taping, and painting every surface of that shaft. The shaft alone adds $1,000–$2,500 to the project.
Cost by Skylight Type
Not all skylights involve cutting a 2x4-foot hole in your roof. Four types cover the range from minimal roof disruption to motorized ventilation.
| Type | Unit Cost | Installed Cost (New) | Best For |
|---|---|---|---|
| Fixed (no-open) | $200–$600 | $1,500–$3,500 | Living rooms, hallways, stairwells — anywhere light matters more than airflow |
| Manual venting | $500–$1,000 | $2,200–$4,500 | Kitchens, bathrooms — moisture escape without running an exhaust fan |
| Solar/electric venting | $1,000–$2,000 | $3,000–$5,500+ | High ceilings, hard-to-reach spots — remote or rain-sensor operation |
| Tubular (sun tunnel) | $200–$800 | $600–$1,500 | Closets, hallways, interior bathrooms — tight spaces, minimal roof disruption |
Fixed skylights account for roughly half of residential installations. They cost less because there are no moving parts and no motor or wiring to install. Venting models add a crank mechanism or motor, plus weatherstripping that must seal against rain even when partially open. Each additional component adds both labor time and material cost.
Tubular skylights deserve more attention than they get. A 10-inch or 14-inch tube captures sunlight at the roof, bounces it down a reflective tube, and diffuses it through a ceiling-mounted lens. Installation takes 2–4 hours with minimal roof penetration: no framing, no shaft, no drywall. In a windowless hallway or walk-in closet, the light output rivals a 60-watt bulb during peak daylight hours.
The Vaulted Ceiling Advantage
Installing a skylight through a vaulted (cathedral) ceiling means the skylight sits directly between the roof rafters with no attic space to bridge. The interior finishing is minimal: trim the opening, add some drywall returns around the edges, and paint.
With a flat ceiling and an attic above, the skylight opening at the roof is 6–12 feet higher than the room’s ceiling. A contractor must frame a light shaft (also called a lightwell) connecting the two openings, then insulate, drywall, tape, and paint every inch of that tunnel. The shaft framing takes half a day. The drywall and finishing take another.
| Ceiling Type | Installed Cost Range | Why |
|---|---|---|
| Vaulted / cathedral | $1,500–$3,500 | Direct roof-to-room, minimal interior work |
| Flat with attic above | $2,600–$5,700 | Light shaft construction, extra materials, extra trade (drywall crew) |
A splayed shaft — where the opening widens as it descends from roof to ceiling — spreads light more evenly but costs 10–20% more than a straight shaft because of angled framing and compound drywall cuts. Worth it in kitchens and living rooms. Overkill in a bathroom.
What Drives the Price Beyond the Skylight Itself
The unit is often the cheapest line item on the invoice. Labor, permits, and roofing materials usually account for more than half the total:
Roof type matters more than roof age. Asphalt shingle is the easiest and cheapest material to cut and flash around a skylight. Tile adds up to 30% to the project because surrounding tiles must be removed and reset without cracking. Standing-seam metal panels sometimes require factory-matched curb kits plus specialized sealer. On flat (low-slope) roofs, code requires curb-mounted skylights with at least 4 inches of rise above the roof surface, plus additional waterproofing layers.
Permits run $100–$500 in most jurisdictions and are non-negotiable for new roof penetrations. Cutting a new opening in a roof alters the structural envelope, which triggers code review. Replacement-in-kind may be exempt in some areas, but check before assuming.
Electrical wiring for electric venting models adds $200–$500 if an electrician needs to run a new circuit. Solar-powered VELUX units sidestep this entirely — the motor runs on a built-in panel and the remote control is wireless, so no electrician is required.
Curb-mounted vs deck-mounted installation affects labor time too. Deck-mounted skylights sit flush with the roof, secured directly to the roof deck. Cleaner look, less leak risk, and standard on slopes above 3:12. Curb-mounted skylights sit on a raised frame (the curb), required for low-slope roofs and for some replacement scenarios where the existing curb is reused. Curb-mounted units cost $50–$200 less for the skylight itself but need more flashing work.
Replacement vs New Installation
Swapping an old skylight for a new one in the same opening is a different job than cutting a new hole, and costs roughly half.
| Scenario | Cost Range | What’s Involved |
|---|---|---|
| Replace existing skylight (same size) | $800–$2,400 | Remove old unit, inspect/repair flashing, install new unit, reseal |
| Replace with size change | $1,500–$3,500 | Reframe opening, new flashing, possible shaft modification |
| New installation (no existing opening) | $1,500–$5,000+ | Roof cut, structural framing, flashing system, interior finish, possible shaft |
When replacing, the biggest cost variable is whether the existing flashing can be reused. If the old skylight has a custom-bent flashing kit in good condition, the roofer can sometimes work around it, saving $200–$400. VELUX and Fakro both sell replacement units sized to fit their own previous-generation flashing.
One thing roofers push: replacing skylights during a roof replacement. There’s real logic behind it. The roofer already has the roofing materials exposed and the flashing accessible, so labor overlap saves $300–$600 per skylight. A 15-year-old skylight on a 20-year-old roof will likely need replacement before the new roof does, and tearing into a 5-year-old roof to swap a skylight later means patching shingles and risking the new roof’s warranty.
Choosing Between VELUX, Fakro, and Others
VELUX controls the largest share of the US residential skylight market, and most roofing contractors stock and install their products by default. That contractor familiarity is a genuine advantage (fewer installation errors), but VELUX prices reflect the brand premium too.
VELUX offers the widest range: fixed, manual venting, solar venting, electric venting, and Sun Tunnel tubular units. Their No Leak Skylight warranty covers the skylight, flashing, and installation for 10 years when installed with VELUX flashing. Solar-powered models skip the electrician entirely because the motor runs on a built-in panel. The trade-off: VELUX commands a 15–25% price premium on comparable specs.
Fakro is the main competitor and prices 15–25% lower on fixed and manual-vent models. Quality is comparable on hardware, though Fakro’s US dealer network is thinner, which can mean longer lead times and fewer contractors experienced with their flashing systems. If your roofer is comfortable installing Fakro, the savings are real.
Sun-Tek and Skymaster serve the budget end. Material costs start at $150–$300 for fixed units. Shorter warranties (typically 5 years vs 10–20), fewer size options, and acrylic glazing instead of tempered glass on entry models are the compromises.
For most homeowners, VELUX is the default choice — broad contractor familiarity means fewer installation mistakes, and the warranty is worth the premium on a roof penetration that needs to stay watertight for decades.
Energy Performance and What Skylights Actually Save
Skylights lose more heat per square foot than vertical windows because warm air rises and hits the glass directly. A skylight’s U-factor (heat loss rate) runs higher than a vertical window of the same glass package. Expect U-0.30 to U-0.50 for double-pane skylights versus U-0.25 to U-0.30 for comparable vertical windows.
The DOE recommends sizing skylights at no more than 5% of a room’s floor area when the room has other windows, and up to 15% in rooms with few or no windows. Oversizing is the most common energy mistake. A skylight that’s too large overheats the room in summer and radiates heat in winter.
The payoff comes from reduced electric lighting. A well-placed skylight in a kitchen or home office can eliminate daytime artificial lighting entirely, saving $50–$150 annually depending on room size and local electricity rates. Pair that with the comfort value of natural light (difficult to put a number on, but homeowners with skylights rarely regret them) and the ROI calculation shifts from pure payback math to quality-of-life math. For a broader look at how daylight harvesting fits among energy efficient home upgrades , skylights rank below insulation and air sealing on payback period but above many other upgrades on occupant satisfaction.
Look for the NFRC label on any skylight, which provides independently certified U-factor, solar heat gain coefficient (SHGC), and visible transmittance ratings. Compare those numbers across brands rather than trusting marketing claims. ENERGY STAR certifies skylights separately from vertical windows, with less stringent U-factor thresholds that reflect the inherent performance limitations of horizontal glazing.
Skylight Lifespan and Maintenance
A quality skylight lasts 20–30 years before the seals and glazing warrant replacement. That roughly matches a composition shingle roof’s lifespan, which is why roofers push for simultaneous replacement.
Maintenance is minimal but not zero:
- Clean the glass inside and out once or twice per year. Exterior cleaning on a roof requires safe access. A telescoping window squeegee works from a ladder for first-floor rooflines; steeper or higher installations need a professional.
- Inspect flashing seals annually, especially after heavy storms. Flashing failure, not glass failure, causes most skylight water problems.
- On venting models, lubricate the hinge mechanism every 2–3 years. VELUX recommends their own silicone-based lubricant, but any non-petroleum silicone lubricant works.
- Check shaft insulation if you notice condensation on the glass or drywall staining around the shaft. Most “leaking skylight” complaints trace to condensation from a poorly insulated shaft , not actual water intrusion. Spray-foam insulation on all six sides of the shaft eliminates most condensation issues; exposed fiberglass batts leave gaps that let warm moist air reach cold surfaces.
How Skylight Cost Compares to Other Window Projects
Skylights sit in a middle tier when measured against other window installations, costing more than a standard window replacement but less than structural window projects.
| Project | Typical Cost | Structural Work? |
|---|---|---|
| Standard window replacement | $300–$1,300 | No (insert) to moderate (full-frame) |
| Skylight — tubular | $600–$1,500 | Minimal (small roof penetration) |
| Skylight — fixed or vented | $1,500–$5,000 | Moderate (roof cut, framing, flashing) |
| Bay window | $1,500–$5,000 | Yes (header reinforcement, exterior finishing) |
| Egress window | $2,500–$5,500 | Heavy (foundation cutting, excavation, well) |
The comparison matters when budgeting a whole-house project. If you’re already replacing windows, adding a skylight during the same project leverages the contractor’s mobilization and may qualify for a bundled discount. Check the window cost overview for the full picture across window types, and see our window project planning guide for sequencing decisions when combining multiple window upgrades.