Skylight Types Explained
Skylights come in four primary categories, each suited to different budgets, roof configurations, and ventilation needs. Understanding the differences will help you choose the right option before requesting quotes.
- Fixed skylights are sealed glass or acrylic units that let in light but do not open. They are the most affordable option and work well in vaulted ceilings, hallways, and stairwells where ventilation is not needed.
- Vented (operable) skylights open to allow hot air and moisture to escape. Manual crank models cost less, while electric and solar-powered models offer remote-control convenience and rain sensors.
- Tubular skylights (sun tunnels) use a small rooftop dome and a reflective tube to channel light into interior rooms. They are the easiest to install and ideal for bathrooms, closets, and hallways.
- Custom architectural skylights include ridge skylights, pyramid skylights, and large multi-panel arrays. These are premium installations typically starting at $3,000 and exceeding $10,000.
Fixed skylights account for roughly 50% of residential installations, followed by vented models at 35% and tubular skylights at 15%. Most homeowners choose glazed glass over acrylic for better clarity, UV protection, and longevity.
Cost by Skylight Type
The table below shows 2026 pricing for each skylight type, including the unit cost (materials only) and the fully installed cost with labor, flashing, and finishing.
| Skylight Type | Unit Cost | Installed Cost | Best For |
|---|---|---|---|
| Fixed | $150–$700 | $800–$2,000 | Light without ventilation |
| Vented (manual crank) | $350–$1,000 | $1,200–$2,500 | Kitchens, bathrooms |
| Vented (electric/solar) | $500–$1,500 | $1,500–$3,500 | High ceilings, smart home |
| Tubular / Sun Tunnel | $200–$600 | $500–$1,200 | Interior rooms, hallways |
Electric and solar-powered vented skylights include a built-in rain sensor that automatically closes the skylight when moisture is detected. Solar models from VELUX qualify for the federal energy tax credit, which can offset a significant portion of the unit cost.
Cost by Skylight Size
Skylight size directly impacts both material and labor costs. Larger units require more structural reinforcement, wider flashing kits, and often a larger light shaft if the attic space is deep.
| Size (ft) | Installed Cost Range | Common Use |
|---|---|---|
| 2 x 2 | $700–$1,500 | Bathrooms, closets |
| 2 x 4 | $900–$2,000 | Kitchens, bedrooms |
| 3 x 4 | $1,200–$2,500 | Living rooms, lofts |
| 4 x 4 | $1,500–$3,200 | Great rooms, additions |
The most popular residential skylight size is 2 x 4 feet, which fits between standard 24-inch rafter spacing without requiring headers or structural modifications. Going wider than 24 inches almost always requires cutting and reframing rafters, adding $200–$600 to the installation cost.
Brand Comparison
Three brands dominate the residential skylight market in 2026. VELUX holds approximately 50% market share, followed by Fakro and Sun-Tek. Here is how their fixed skylight pricing compares for a standard 2 x 4 size.
| Brand | Fixed Unit Price | Warranty | Notable Feature |
|---|---|---|---|
| VELUX | $350–$650 | 10-year on product, 20-year on glass | Clean, Quiet & Safe glass |
| Fakro | $250–$500 | 10-year limited | EZPro installation system |
| Sun-Tek | $200–$400 | 10-year limited | Budget-friendly, self-flashing |
VELUX commands a premium price but offers the widest product range, the most installer familiarity, and superior warranty coverage. Fakro is the strongest mid-range contender with competitive pricing and good build quality. Sun-Tek is the go-to budget option, particularly for rental properties and utility installations.
New Installation vs Replacement
The cost difference between a brand-new skylight installation and replacing an existing one is substantial, primarily because new installations require cutting through the roof deck and framing the opening.
New Installation
$500–$1,500 labor
- Cut opening through roof deck
- Frame opening with headers
- Install flashing and waterproofing
- Build interior light shaft
- Drywall, tape, and paint shaft
Replacement
$300–$800 labor
- Remove old skylight unit
- Inspect existing frame
- Install new unit in existing opening
- Replace flashing kit
- No structural work needed
If your existing skylight is leaking but the frame and flashing are sound, a replacement is straightforward and typically takes 2–4 hours. A new installation in a location that has never had a skylight can take a full day and may require permits in many jurisdictions.
Interior light shaft costs: If the attic is between your ceiling and the roof, you will need a light shaft to channel light from the skylight down to the living space. A straight shaft costs $500–$1,000, while a splayed (angled) shaft that spreads light across the room runs $1,000–$2,000+. Light shaft construction is often the single biggest variable in total skylight installation cost.
Flashing & Accessories
Proper flashing is the single most important factor in preventing skylight leaks. Never reuse old flashing when replacing a skylight - the $40–$160 investment prevents thousands in water damage.
| Accessory | Cost Range | Notes |
|---|---|---|
| Flashing kit (shingle roof) | $40–$80 | Step + counter flashing, included by some brands |
| Flashing kit (tile/metal roof) | $80–$160 | Profile-specific, more complex |
| Blinds / shades (manual) | $50–$150 | Light control, room darkening |
| Blinds / shades (solar-powered) | $150–$350 | Remote control, eligible for tax credit |
| Curb mount adapter | $50–$200 | For converting curb mount to deck mount |
Most skylight leaks are caused by failed flashing rather than the skylight unit itself. When getting quotes, confirm that the price includes a brand-new, manufacturer-matched flashing kit. Flashing typically lasts 10–20 years, so if your skylight is 15+ years old, the flashing is likely due for replacement even if the glass is fine.
Energy Efficiency & Tax Credits
ENERGY STAR-certified skylights can reduce heating and cooling costs, and the federal government offers a generous tax credit to offset your investment.
Federal Energy Tax Credit (2026)
Under the Inflation Reduction Act, homeowners can claim 30% of the cost of ENERGY STAR-certified skylights as a tax credit, up to $600 per year. This applies to the product cost only (not labor). Solar-powered blinds from the same manufacturer also qualify. The credit is available through 2032.
Example savings: A VELUX solar-powered vented skylight costing $1,200 (unit + blinds) qualifies for a $360 tax credit, bringing your effective material cost down to $840.
Modern ENERGY STAR skylights feature Low-E coatings, argon gas fill between panes, and warm-edge spacers. Look for these performance ratings when shopping:
- U-Factor: 0.30 or lower (measures heat loss; lower is better)
- SHGC (Solar Heat Gain Coefficient): 0.25–0.40 depending on climate zone
- VT (Visible Transmittance): 0.40 or higher for good daylight
Skylight lifespan: Quality skylights last 15–30 years. Flashing typically lasts 10–20 years. Plan on at least one flashing replacement over the skylight's lifetime. Acrylic dome skylights yellow and become brittle faster, typically lasting 10–15 years versus 20–30 for glass.
Installation Process
A professional skylight installation typically follows these steps. Understanding the process helps you evaluate contractor quotes and ask the right questions.
- Site assessment and marking (30 min): The installer identifies the best location from inside and outside, checking for rafters, wiring, plumbing, and HVAC ducts in the path.
- Interior opening (1–2 hours): Drywall is cut and removed. If rafters need cutting, temporary supports are installed and headers are framed in.
- Roof opening (1 hour): Shingles are removed around the area, and the roof deck is cut to the exact skylight dimensions.
- Skylight installation (1–2 hours): The unit is set into position, leveled, shimmed, and secured with screws to the frame or curb.
- Flashing and waterproofing (1–2 hours): Step flashing, counter flashing, and ice-and-water shield membrane are installed per manufacturer specifications.
- Light shaft construction (2–6 hours): For installations with attic space, the shaft is framed, insulated, drywalled, taped, and primed.
- Finishing (1–2 hours): Interior trim is installed, the shaft is painted, and the exterior shingles are sealed around the flashing.
Timeline: A replacement skylight can be completed in half a day. A new installation with a light shaft typically takes 1–2 full days. Multi-skylight projects may take 2–3 days. Always plan for weather - installers need dry conditions for the roof opening and flashing work.
Regional Pricing Differences
Labor rates and permit costs vary significantly across the country. Here is how a standard fixed skylight installation (2 x 4, new opening) typically prices out by region.
| Region | Installed Cost (Fixed, 2x4) | vs National Avg |
|---|---|---|
| Northeast (NY, MA, CT) | $1,400–$2,800 | +15–25% |
| West Coast (CA, WA, OR) | $1,300–$2,600 | +10–20% |
| Midwest (IL, OH, MN) | $1,000–$2,000 | Baseline |
| Southeast (FL, GA, NC) | $950–$1,900 | -5–10% |
| South Central (TX, OK, AR) | $900–$1,800 | -10–15% |
Permit costs add $50–$300 depending on your municipality. Some jurisdictions require permits for new roof penetrations but not for replacement-in-kind work. Always verify with your local building department before starting the project.
Skylight Pros & Cons
Pros
- Adds natural daylight, reducing electricity usage
- Vented models improve air circulation and reduce humidity
- Increases perceived space in small or dark rooms
- Federal tax credit covers 30% of ENERGY STAR product cost
- Adds resale value - skylights have a 50–80% ROI
- Modern units are well-insulated and leak-resistant
Cons
- New installations are expensive ($1,500–$4,500+)
- Any roof penetration is a potential leak point
- Can cause unwanted heat gain in summer
- North-facing skylights provide less direct light
- Light shaft construction adds significant cost
- Cleaning exterior glass requires roof access