Skylight work in New Jersey carries no single fixed total: a new skylight installed runs $1,600 to $4,200 and a replacement $800 to $2,400 per HomeGuide, while leak repair runs $225 to $800 per Angi and Modernize. A free written estimate prices the specific unit and roof.
The price depends on whether the job is a new installation, a like-for-like replacement, or a targeted leak repair, so each band sits in its own range below.
How Much Does a New Skylight Installation or Replacement Cost?
A new skylight installed runs $1,600 to $4,200 per HomeGuide, and replacing an existing unit runs $800 to $2,400 per HomeGuide, because replacement reuses the existing roof opening while a new installation cuts and frames one.
The installation range reflects the work of cutting the deck, framing the opening, setting the unit, and waterproofing the penetration with an engineered flashing kit. Replacement falls into the lower $800 to $2,400 band per HomeGuide because the rough opening already exists and the labor focuses on removing the old unit, setting the new one, and reflashing it. The watertight result in both cases depends on a VELUX or Fakro flashing kit matched to both the mounting type and the roof covering, which sheds water without relying on caulk that breaks down over time, per VELUX America.
Replacement becomes the grounded choice once a skylight passes the 10-to-20-year service life on the InterNACHI Estimated Life Expectancy Chart or once the insulated-glass seal fogs between the panes. A failed perimeter seal lets moisture into the sealed airspace and causes persistent fogging that cleaning cannot fix, the failure VELUX America covers under its 20-year insulated-glass-seal warranty, and a replacement unit resolves it where a reseal of the glass cannot.
What Does a Skylight Leak Repair Cost?
A skylight leak repair runs $225 to $800 overall per Angi and Modernize, with a reseal at $75 to $250 and a flashing repair at $150 to $500, so the figure depends on whether the seal or the flashing failed.
The flashing repair band of $150 to $500 per Angi and Modernize addresses the leading cause of a skylight leak, which is failed or improperly installed flashing rather than the glass, per roofing trade consensus. A reseal at $75 to $250 per Angi and Modernize handles cracked, dried, or peeling caulk around the curb on a unit still inside its service life, while a larger flashing repair restores the engineered kit that sheds water at the penetration. A diagnostic step precedes the price: water that tracks with rain and storms is a true leak, while water that comes and goes with temperature and humidity is condensation from excess indoor humidity on cold glass, not a leak, per VELUX America.
What Drives a Skylight Price Up or Down in NJ?
Mounting type, roof slope, the flashing kit, and the depth of the repair drive a skylight price, and no federal or New Jersey tax credit offsets the cost. A written estimate prices the unit and the roof in front of it.
Roof slope sets the detail and the cost of the penetration. A skylight on a roof under 3:12 sits on a curb at least 4 inches above the roof plane under IRC R308.6.8, unless the manufacturer instructions specify otherwise, and that curb adds work over a low-profile deck-mounted unit on a steeper slope. The two mounting types, deck-mounted and curb-mounted, each take their own matched flashing kit per VELUX America, which carries into the labor and material side of the estimate.
Permit framing and warranty conditions round out the picture in New Jersey. Repair or replacement of the roof covering and its penetrations on a detached one- and two-family dwelling counts as ordinary maintenance requiring no construction permit, while a commercial building repairing more than 25 percent of its total roof area in a 12-month period requires a permit, per N.J.A.C. 5:23-2.7. The VELUX No Leak installation warranty applies only when the unit is installed to spec with a matching VELUX flashing kit, per VELUX America, so a spec installation protects the value of the price paid.
Skylight pricing in New Jersey splits into installation at $1,600 to $4,200, replacement at $800 to $2,400 per HomeGuide, and leak repair at $225 to $800 per Angi and Modernize, with the final figure set by the unit, the mounting, and the depth of the work.