A building is provided in which safety, comfort, and economic efficiency are improved by an enclosed structure and by shielding from an exterior. The building has a foundation 3, a wall 8 standing around the foundation 3 so as to be integrated with the foundation 3, a housing section 2 serving as an interior space arranged in a center of the foundation 3, a roof 30 covering an internal space surrounded by the wall 8, the roof 30 being supported by the wall 8 and not structurally combined with the housing section 2, and seismic isolation mechanisms 40 for suppressing vibration of the housing section 2 upon generation of earthquake. An interior of the building is formed as an enclosed space defined by the foundation 3, the wall 8, and the roof 30.