While most condominiums are apartments, a townhouse is attached to one or more houses and can run the gamut from duplexes and triplexes to communities with hundreds of homes. Buyers separately own their homes and the land on which the houses sit. With a condominium, the unit owners jointly own the land and this common interest cannot be separated from the others.
Townhouses can be structured in many ways. Some, particularly huge communities, have common areas—such as swimming pools—that are similar to condominiums.