What are the four types of ADUs?

ADUs are generally grouped into four types: a detached standalone cottage, an attached addition built onto the main house, a converted garage or accessory structure, and an internal conversion such as a basement or upper-floor unit. Which types a given lot allows depends on local zoning, and not every Lowcountry town permits all four. Brian Beatty can explain which type fits best on a specific property's zoning and layout.