Condos
A condo is a unit that's part of a larger building like a high-rise or garden-style community. Condos have shared public spaces such as hallways, pools, gyms, and courtyards to which all residents have access. The condo association owns and manages the building, shared spaces, and grounds. The residents own the individual units. Depending on the ownership structure, a condo could also be classified as a townhome.
Townhouses
A townhouse may also be a condo, depending on the ownership structure. Townhouses typically have more than one story and are connected to the house(s) next door, much like a rowhome. Some townhouses are part of a condo association, making them a condo, and others aren't.