Skylight replacement in the D/FW Area usually involves a skylight that is mounted to a wooden curb. Replacing these skylights without disturbing the roof flashing or skylight well is fairly routine. The most critical thing is to get the measurements of the curb right. Skylight Solutions offers a couple of options for curb mount replacement:

With its 10-year hail proof guarantee and a clear view to the outdoors the Velux Fixed Curb Mount with 2 layers of tempered lo-e3 glass and argon gas fill is a great choice. It is also available in white laminated glass. Velux makes manual and solar powered blind options to filter or block the light. Velux Curb Mount Replacements with tempered glass range from $350.00 to $675.00+tax installed.
Acrylic skylights are the most common in this area. All of our Acrylic Skylights are made with commercial grade extruded aluminum frames with welded joints. Every dome is inspected for quality and guaranteed for 5 years. We stock double dome skylights in white over clear and bronze over clear. Special order sizes and acrylic options are available within a week. Double Dome Acrylic Curb Mount Replacements range from $245.00 to $475.00+tax installed.
If your skylight is not curb mounted, it is self-flashed or pan flashed. The acrylic version can usually be replaced without disturbing the flashing. The measurement needed is the top of the skylight cap. Glass self-flashed or deck mount skylights usually need to be replaced. We bid these per job.

If your skylight is leaking and it does not have a crack or a hole in it, the flashing is probably leaking where your skylight ties into the roof. The only way to properly fix this is to remove the shingles around the skylight, wrap the curb with ice and water shield and then re-flash the skylight and re-shingle the roof. Prices start at $350.00+tax.