Primary Factors That Influence Cost
The size of the leak and the amount of water intrusion set the baseline cost. A small spot on your ceiling costs far less than a large area where water has soaked insulation, drywall, and framing. The duration of the leak also matters greatly. Undetected slow leaks over weeks can cause extensive hidden rot and mold, which increases the project's complexity and price.
The location of the damage is another major factor. An accessible attic leak may be simpler to address than a leak inside a finished cathedral ceiling or a wall cavity. The types of materials affected also change the cost, as restoring hardwood floors or custom millwork is more involved than replacing standard drywall and insulation.