The building has such unique program and location. This facility is served as a place where the park janitors rest, wash and store cleaning tools at the same time. Boramae Park has small and large hills within the park. The site is located at the endpoint of one of those hills. The fan shaped area, which is about two-thirds of the site, is in contact with the road and the rest one-third touches the end of the hill.
In fact, the site is in-between the last tail of the hill and the road. With the site given, the park required a shelter for the janitors and the storage for the equipment. First, the initial design concept was to minimize the shape of the site, which results an arc-shaped mass along the road providing a shelter for the janitors. Then, the arc-shaped mass has been elevated from the ground in order to allow the flow of the hill into the inner courtyard of the building. The floating mass is supported by the several storage rooms rather than the columns.