Deck-mount or curb-mount, fixed or venting, new opening or replacement—get the full installed cost including unit, flashing, interior framing, and labor before you quote it.
A skylight is only as watertight as its flashing. Manufacturer-specific flashing kits ($80–$250 each) are designed for that unit's curb profile. Generic step flashing and improvised sealant is how you get a leak-at-year-3 callback. Always specify "factory flashing kit included" in your proposal—it protects you legally and justifies the price premium.
Cutting into asphalt shingles takes 30 minutes. Cutting into tile or slate, removing surrounding tiles without cracking, and re-bedding after flashing takes 2–3 hours more per skylight. Price this explicitly in your proposal or you'll eat it. Tile skylight installs should be quoted at 1.5–2× the asphalt price for the same unit.
Most skylight quotes cover the roof opening. They skip the interior: cutting through ceiling drywall, framing the shaft, drywalling, taping, priming. A splayed shaft can add 6–8 hours of interior work that the homeowner assumes is included. Itemize it—or clarify "roof work only" and the customer arranges drywall separately.
The Roofer's Business Starter Kit includes a skylight and general roofing price book, an inspection report form, and a service agreement template. Guide from $19 — Complete Kit with all 19 templates, $49.
Get the Roofer's Kit →Skylight installation is a high-value job that requires precision — the curb, flashing, interior trim, and waterproofing all have to be right or you're going back to fix a leak. This calculator prices the installation based on skylight size, roof type, interior finish, and whether a shaft or tunnel is needed for a dark ceiling space.