Underground: beneath the surface of the ground.

Study room: a room in a house used for reading, computer work, or paperwork.

Porch: a covered shelter projecting in front of the entrance of a building.

Basement: the floor of a building which is partly or entirely below ground level.

Loft: a room or space directly under the roof of a house or other building, which may be used for accommodations or storage.

Deck: a structure of planks or plates, approximately horizontal, extending across a ship or boat at any of various levels, especially one of those at the highest level and open to the weather.

landing: a level area at the top of a staircase or between one flight of stairs and another.

Attic: a space or room just below the roof of a building.

Utility room: a room equipped with appliances for washing and other domestic work.

Terrace: a level paved area or platform next to a building

Garage: a building for housing a motor vehicle or vehicles.

Playroom: a room in a house that is set aside for children to play in.

Balcony: a platform enclosed by a wall or balustrade on the outside of a building, with access from an upper-floor window or door.