How much does a finished basement or a legal ADU add to my Folly Beach home's value?

A legal ADU adds more measurable value on Folly Beach than a finished basement would, since flood zone construction there pushes living space up rather than down, making a true basement rare to begin with. An ADU's rental potential also matters more on a beach town like Folly Beach, where short-term rental demand is strong, provided current zoning and rental rules allow it. Brian Beatty checks a specific Folly Beach property's zoning before crediting either feature.