A building includes a rigid dwelling-house enclosing an inner space, a swimming-pool, and a device for moving the dwelling-house relative to the swimming-pool between a first position in which the dwelling-house is positioned on top of the swimming-pool which is thereby incorporated within the inner space of the dwelling-house, and a second position in which the dwelling house is adjacent the swimming-pool. The swimming-pool is usable as an outdoor swimming-pool or a covered swimming-pool, each of the dwelling-house and the swimming-pool retaining a separate functionality and being usable separately and simultaneously.
