An apartment (American English), flat (British English) or unit (Australian English) is a self-contained housing unit (a type of residential real estate) that occupies only part of a building, generally on a single level. Such a building may be called an apartment building, apartment complex, flat complex, block of flats, tower block, high-rise or, occasionally, mansion block (in British English), especially if it consists of many apartments for rent. In Scotland, it is called a block of flats or, if it is a traditional sandstone building, a tenement, a term which has a pejorative connotation in the United States. Apartments may be owned by an owner/occupier, by leasehold tenure or rented by tenants (two types of housing tenure).
A Waterside Apartment is the one located on the banks of a water body like river, lake, beach etc as shown in photo above.