noun
General term for a place to stay, such as a hotel, inn, or dormitory. Often used in compound words like 宿舎費 (lodging expenses).
旅行の宿舎はもう予約しましたか。
Have you already booked accommodation for the trip?
noun
Specifically refers to housing provided for government officials, police, or military personnel. Often used in official contexts.
警察官は官舎という宿舎に住んでいる。
Police officers live in official housing called 官舎.
Compound of 宿 (lodging) and 舎 (building, house). The kanji combination directly conveys a building used for lodging.