These kinds of apartments typically consist of one large room which serves as the living, dining, and bedroom. Kitchen facilities may either be located in the central room, or in a small separate room, and the bathroom is usually in its own smaller room.
Studio, efficiency, and bachelor style apartments all tend to be the smallest apartments with the lowest rents in a given area, usually ranging around 300 to 450 square feet (25–45 square metres) in the United States, but considerably smaller in countries such as Japan, South Korea, and several European capitals.
In British usage, a studio flat has its own bathroom; a single room with cooking facilities. Traditionally, if a dwelling has a shared bathroom, it is known as a bedsit. This distinction is encountered less frequently, as are bedsits themselves (especially in large cities) due to the consequences of the Housing Act 1989 discouraging landlords from offering this type of - once widespread - accommodation.
A variation common in New York City is the "L-shaped" or "alcove" studio, in which the central room branches off into a small alcove that can be used for sleeping or dining.
Bachelor apartment, or simply "bachelor," is the common term in English Canada for any single room dwelling unit which is not a shared accommodation. A shared room, or particularly small bachelor, is sometimes referred to as a "bachelorette." Residents of the province of Quebec (most in French) widely use the term "studio".
Japan has an even smaller variation of the studio apartment known as the one room mansion.
Known as studio rooms in New Zealand, they frequently feature a bedroom with study area and an en-suite bathroom. Spaces such as kitchen, lounge and dining area are communal between other people staying in that apartment.
Studio apartments in Norway are called "1-romsleilighet", ”one-room-apartment" in English, because they count both the living room and the bedrooms. Hence an apartment with one bedroom is called a "two-room-apartment" (2-romsleilighet).
Studio apartments in generally are called One room kitchen apartment featuring a hall cum bedroom, including a bathroom and attached kitchenette to the hall mostly availed by one or more Bachelor or a small family ranging around 200 to maximum up to 450 square feet (equivalent to approximately 15 – 40 square metres).
Studio apartments are commonly referred to as quads; and are a common feature in Eastern Kingston. They generally consist of one main room, acting as the living room, dining room and bedroom. The kitchen exist within the same room, with partitioning wall. The bathroom is in a smaller room, by itself. These studio apartments generally come adequate yard space and washing facilities (on the outdoors). They have a bed, a stove and a TV too.
A studio apartment is called quitinete (from kitchenette). It is basically composed of one room, one bathroom, and a kitchen, which is often in the same space as the room. Lately, newly built quitinetes are starting to be called "studios", for the modern appeal English as a foreign language has.
Studio apartments are called T0, the "0" meaning that the apartment has no separate bedrooms.