The hall is located on a building line that defines a new public space and forms another building stone in the mosaic of the existing and planned buildings. The facade, which defines the public space, is two-storeys high and further surmounted by a roof-slant. The ground plan is as broad as possible, while retaining setback from the adjacent buildings. The awning-covered entry and a shop window upon up to the public space. The building is compact. The ground plan is defined by the handball field with a small gymnasium attached perpendicularly to the field. The rest of the space is used by service facilities. The handball field is oriented in the east-west direction and is longitudinally illuminated by north-facing windows; hence it requires no shading. The building makes use of the fact that the building plot descends some 2.5 meters below the street level. The auditorium hence descends along the hillside in the fashion of ancient amphitheatres. Since the gymnasium does not require as high ceiling as the handball field, the heights of the ceilings are thus naturally aligned at the same height of the ceiling structure. With the exception of the entrance shall, the common facilities area is divided into two storeys. The upper floor rooms are illuminated either with facade-wall windows or through roof openings. The slanted roof covered with extensive greenery draws the rainwater into a massive spouter protruding from the house, where a waterfall drops into an underground reservoir. The rainwater can be used for watering of the outdoor athletic fields and of the garden. Extensive roofs always collect vast amounts of water that usually disappears without trace. On this roof, the water cycle gets transformed into a natural phenomenon.
