How much does it cost to fix a leaking skylight?

The cost to fix a leaking skylight typically ranges from $200 to $1,500, depending heavily on the root cause of the leak and the extent of the required repairs. If the leak is minor and can be resolved by cleaning the frame and applying a fresh bead of professional-grade polyurethane or silicone sealant around the flashing and glass joints, the cost usually ranges from $200 to $500. However, if the leak stems from a severely damaged, rusted, or improperly installed flashing kit that requires complete removal and replacement, or if the underlying wooden curb and roof decking have rotted due to prolonged water exposure, expenses can easily escalate from $800 to over $1,500. In scenarios where the skylight unit itself is old, fogged, and structurally failing, replacing the entire skylight and flashing assembly may be recommended, which typically costs between $1,000 and $3,000.