The space of the apartment in the top floor of the housing block is designed according to the needs of a young family. A wish to have bright and cozy space was fulfilled by introducing one dark rough texture plane which goes from the entrance to the kitchen provides the axis of the space around which all rooms are located. This apartment located in the southern side consists of combined space including a living room, a kitchen a dining room, two bedrooms and a bathroom. The minimal bathroom with an area of six square meters is equipped with all necessary plumbing and household appliances (washing and drying machines). Mirror and stretched illuminated ceiling planes were used to visually enlarge this small space.