penthouse
//ˈpɛntˌhaʊs//
Noun
penthouseSingular
penthousesPlural
1
A luxurious apartment or suite on the top floor of a tall building, typically with large windows and a terrace.
They moved into a penthouse with a stunning view of the city.
2
A structure on the roof of a building, such as a small house or shed.
The building has a small penthouse on the roof for storing maintenance equipment.