noun
privately owned unit; exclusive portion
Legal term for the individually owned parts of a condominium or multi-unit building, as opposed to shared common areas. The second gloss 'exclusive element' is a less common, more general translation.
マンションの専有部分は、区分所有者が自由に使える。
The privately owned unit of the condominium can be freely used by the unit owner.
専有部分と共用部分の境界は、壁の中心線で決まる。
The boundary between the exclusive portion and the common areas is determined by the center line of the wall.
Compound of 専有 (せんゆう, 'exclusive possession') and 部分 (ぶぶん, 'part'). A modern legal term.