The Cent Gardes Gymnasium is a type X public building built in 1989, with an area of 4 700m², dispatched on 3 different floors, 2 of which are underground. This gymnasium welcomes everyday a considerable number of children from different schools and adults from different sport associations in the neighborhood. The intervention here consists of the accessibility of the establishment, interior and exterior. Our design group is determined to identify every existing accessibility problems in order to deliver a public building that is accessible to everyone.