How much does it cost to replace a skylight?
Short answer. Replacing a skylight in the same opening usually costs less than installing a new one, because the framing and light shaft already exist; the price comes down to the new unit, a new flashing kit, the roofing work around it, and any interior water damage. Doing it during a roof replacement is the most economical timing, since the shingles around the skylight are coming off anyway.
What sets the price
- Same size or resize. A unit made to fit the existing opening is the simplest swap. Changing size means reframing and reworking the drywall shaft.
- Unit type. Fixed, manual venting, then electric or solar venting, each a step up in price.
- Curb or deck mount. An old curb-mounted unit can often be replaced with a matching curb unit or converted to a deck-mounted one, and conversion means more framing.
- Flashing kit. Always new with a new skylight, since kits are made for each unit size and roof type.
- Roof work. Removing and reinstalling shingles around the unit, which on an older roof can mean brittle shingles and a visible patch.
- Interior damage. Water-stained drywall in the shaft, a rotted curb, or stained ceilings below.
- Access. Steep or high roofs need more setup.
When to replace rather than repair
- Fog or moisture between the panes, meaning the glass seal has failed.
- A cracked, yellowed or brittle acrylic dome.
- A rotted curb or frame.
- A unit around 20 years old when the roof is being replaced.
Gather the details first
Most manufacturers put a model and size code on a label inside the frame. Having that code, or the outside curb dimensions on a curb unit, makes it much easier to price a direct replacement. See replacing skylights with the roof and roof replacement cost in Georgia.