Abstract: Building for a group housing facility in the form of a building body divided into a housing section (1) with a number of housing units (4-12) and a common unit (2, 3). The building body is in its outer shape essentially symmetric around a standing central axis (19), for example with a circular or polygon shaped periphery, and exhibits a roof (25). The housing units are arranged as sectors in a ring-shaped peripheral section, that the common unit comprises at least a central common unit (2) arranged on the inside of the housing section. The central common unit comprises a centrally placed pool area with a central pool (28) and a common ring-shaped walking space (33) around the pool and between the pool and the housing units. The roof is light transmittable over at least parts of the common unit.