In the most flood prone areas where building quality is the worst, there are islands created through canals. Those islands are used as town forests and restricted for people apart from the forestry workmen. On the opposite side of the canal there are eight storey courtyard buildings placed, which are of a mixed use of housing, shops and working space. The courtyard is one storey raised in order to get space for infrastructure (membrane filtration system, water tanks, garbage collection) and open working area for the workshops in the first storey which are on a flood proof level. The concrete structure provides infrastructural cores (stairs and wet walls) and slabs. Therefore the facade is nonstructural and can be constructed by the inhabitants.