Apartments are buildings or a part of building that is used as a dwelling or business premises. The word “apartment” typically refers to a self-contained suite of rooms designed for one person or couple. Apartments come in all shapes and sizes, with different features and amenities. There is no single apartment size because they can vary by region. An apartment is a self contained unit, traditionally constructed in a high-rise building. It may contain one or more bedrooms (although multiple bedroom apartments are less common), as well as a living room, bathroom and kitchen. Single family dwellings often include three or four rooms and one bathroom. The term apartment also describes the function of an individual unit.