Apartment

When there is no tenant occupying an apartment, the apartment owner or landlord is said to have a vacancy. For apartment landlords, each vacancy represents a loss of income from rent-paying tenants for the time the apartment is vacant (i.e., unoccupied). Landlords' objectives are often to minimize the vacancy rate for their units. The owner of the apartment, typically when transferring possession to the occupant, gives him/her the key to the apartment entrance and any other keys needed, such as a common key to the building or any other common areas and a mailbox key. When the occupant(s) move out, these keys are typically returned to the owner.
Apartment types and characteristics
Apartments can be classified into several types. In North America the typical terms are a studio, efficiency or bachelor apartment (bedsit in the UK). These all tend to be the smallest apartments with the cheapest rents in a given area. This kind of apartment usually consists mainly of a large room which is the living, dining, and bedroom combined. There are usually kitchen facilities as part of this central room, but the bathroom is a separate, smaller room.