What is the difference between a finished basement and an ADU in Milton?

A finished basement is simply additional living space inside the main home, without its own kitchen or a legally separate entrance, while an accessory dwelling unit is a distinct, permitted dwelling with its own kitchen, bathroom and typically a separate entrance. Whether Milton's zoning code recognizes and permits ADUs, and under what conditions, is a question for the city's planning department rather than something this site can confirm generally. Joel Boss can point Milton buyers toward that office directly.