Maybe just a matter of semantics, but high-density housing in the U.S. is mostly comprised of "condos" and "apartments". Condos are owned but must comply with

Maybe just a matter of semantics, but high-density housing in the U.S. is mostly comprised of "condos" and "apartments". Condos are owned but must comply with homeowners association (HOA) rules on upkeep and maintenance. Apartments are rented and maintained by Landlord.