also: とうおく
rooftop structure; penthouse; elevator machine room
Refers to a small structure on a building's roof, such as an elevator machine room, stairwell housing, or a decorative tower.
The elevator machine room is in the rooftop structure of the building.
The penthouse on that apartment building looks like a small tower.
Standard kanji spelling. The reading とうおく is less common.
Rare reading; とうや is the usual pronunciation.
Compound of 塔 (tower) and 屋 (roof/house), literally 'tower house'. The reading とうや is a standard on'yomi combination; とうおく is a less common variant.