administrative building; administration building
Refers to a building on a campus, hospital, factory, or similar site where administrative offices are located.
The hospital's administrative building is to the right of the main entrance.
Please complete the procedures at the university's administration building.
校舎 is a school building (classrooms, etc.), whereas 管理棟 is the administrative building on a school campus.
Compound of 管理 (kanri, 'management, administration') and 棟 (tō, 'building, wing').