Accessory Dwelling Units are an innovative way to increase affordable housing options in Atlanta. Like a guest or carriage house, an ADU is basically a tiny functional home that can be built in backyards, behind a main residence. They can be rented out or used as an extra living space for family members. Reynoldstown resident James Martin is one of the first in the city to build an ADU. He, like many others, believes they have the potential to redefine communities and help protect legacy residents against gentrification.