Skylight pricing varies a lot—not because contractors are guessing, but because skylights touch multiple trades: roofing, flashing, waterproofing, interior drywall, and sometimes electrical.
Instead of focusing on a single number, use this guide to understand what actually drives cost.
Top cost factors
1) Skylight type
- Fixed: simplest, fewer moving parts.
- Manual venting: adds functionality and complexity.
- Solar/electric venting: higher component cost, often better convenience.
2) Roof pitch and access
Steep roofs, multi-story access, and limited staging areas increase labor and safety needs.
3) New cut-in vs replacement
- Replacement: using an existing opening is often more predictable.
- New cut-in: includes framing, opening layout, and interior shaft work.
4) Flashing and waterproofing system
Quality skylight installs rely on correct flashing kits, underlayment tie-ins, and water management details—not caulk.
5) Interior shaft depth and finish
Deeper shafts require more drywall, texture, and paint work.
6) Add-ons
- Blinds/shades
- Electrical controls
- Multiple units or combined reroof projects
How to control cost without cutting corners
- Replace with a similar size when possible
- Bundle skylight work during a reroof or major repair
- Choose a flashing system matched to your roof type and pitch
Next step
If you’re planning a skylight project, explore skylights, read Velux flashing kits, and request an estimate. If financing helps align timing with budget, see financing.