Apartment

An apartment is a building that holds housing units for many people, each individual unit usually smaller than a full-size house.

811 East 68th Street (New York City)
Gary Seven and his associates worked in Apartment 12B, using advanced alien technology, including his servo hidden in his office in New York City. 

James Kirk's apartment (San Francisco)
James T. Kirk's San Francisco apartment was the home of Admiral James T. Kirk in 2285. It was in a tall skyscraper in San Francisco and featured sweeping views of the city, the bay, Alcatraz, the Golden Gate Bridge and at least two other prominent 23rd century skyscrapers. The apartment featured a fireplace in the living room with a curved wall and mosaic treatment behind it. To the left of the fireplace and to the right of the windows there was a metallic sculpture that perhaps could have been a model of the skyscraper the apartment was in. Kirk filled the apartment with antiques, reflecting his fondness for them; in particular, a lot of the antiques were of a nautical nature. Also among the items were 18th and 19th century Earth firearms and a late 20th century Earth computer.