The study plot is located on Ermou street, a commercial street near Aristotelous square. The main idea is to provide a multifunctional sustainable indoor-outdoor space for the people that use the outdoor market. The wood and steel construction stands at 28 meters tall and contains: shops, a bicycle parking lot, an outdoor cooking and sitting area, a public WC, office spaces and also hydroponic and regular farming on the top floors. The building uses renewable energy sources, rain water and rubish to transform them into compost, which then can be used for the farming.