@aem1337 wrote:
My dad passed away and my mom was the sole owner so her capital gains exemption is 250K.
When did your dad pass and was he on title with your mom at that time?
If so, your mom likely took your dad's share of the property (presumably 50%) at the fair market value on the date of his passing (i.e., a stepped-up basis for your dad's share). Depending on the date of his passing and the FMV at that time, this could produce a better result than tracking down the cost of improvements made decades ago.
