別べつ棟むね

noun

separate building; outbuilding; outhouse

Refers to a building that is physically detached from the main building on the same property. Can be used for annexes, sheds, or separate wings. The gloss 'outhouse' here means a separate small building, not necessarily a toilet.

• 本ほん館かんとは別べつ棟むねの会かい議ぎ室しつをご利り用ようください。

  Please use the meeting room in the separate building, not the main building.