What is the impact of a finished basement on home value?

A finished basement adds usable living space without increasing the home's footprint, which can significantly boost value. It typically recoups 50 to 75 percent of the cost at resale, depending on the quality of the finish and how it is used. A well-finished basement with a bathroom, egress window, and flexible space adds the most value. A poorly finished basement may add little to nothing.