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

A finished basement or a legal accessory dwelling unit can meaningfully raise a Sandy Springs home's value by adding counted living space or rental income potential, though the exact amount depends on permits, quality of the work and what comparable sales with similar additions have fetched nearby. An unpermitted version of either typically adds far less. Joel Boss can compare Fulton County comparable sales with and without these features before you invest in one.