The main idea in the design of a one-room apartment in the residential complex of Harbour City is based in dividing the space into functional zones. Separating the bedroom part with a sliding wall, consists of wooden bars, allows the space to be changed according to the user’s needs. The proposal goes through functional simplicity, clear lines and the possibility of intervention by the user to divide the space. The sliding wall acts as a changing element, which can separate the intimate zone from the social zone. With such a minimum area, it is essential to highlight and use all its potential without creating any unused areas.