HOW TO USE IT
How to use the Skylight Installation Cost Calculator
- 1
Enter the number of skylights.
- 2
Choose size and type (fixed, venting or tubular).
- 3
Set the roof pitch and flashing level.
- 4
Review the total cost and line-item breakdown.
THE MATH
Skylight installation cost formula
Total = count × unit price × size × type × pitch + flashing + laborThe model starts at $1,000 for a small fixed unit; medium size adds 25%, venting adds 20%, and steep pitch adds 30%. Premium flashing adds ~$300 per unit. Labor runs ~$60/hr.
PRACTICAL EXAMPLE
2 fixed medium skylights, medium pitch, standard flashing
Units = 2 × $1,000 × 1.25 × 1.1 = $2,750. Labor = 2 × 6 h × $60 = $720. Total ≈ $3,470.
FAQ
Frequently asked questions
How much does a skylight cost installed in 2026?
Use $1,000-$2,800 per skylight as an initial planning range depending on size, type and roof conditions.
Fixed or venting?
Fixed is simpler and cheaper; venting adds fresh air.
Does steep pitch change the price?
Yes. A steep roof increases access and fall-protection work; replace the 30% planning factor with a job-specific quote.