House has been designed for an older married couple. Therefore, the aim of all major functions should be concentrated on the ground floor. There were bedroom, kitchen, dining room, laundry room, pantry and living room. On the first floor would be only two rooms: an office (with sofa bed) and guest bedroom. Diagram below shows shaping the form of the building. We started from a simple cube, which was then divided into four parts (living room with dining room, kitchen, bedrooms, office with guest bedroom). To gain more space on the living room I decided to widen and lift at 3 meters office and guest bedroom. it created twisted staircase.