Sash is thought to affect the common area and exterior of the building. appraisal can not be changed arbitrarily. Two types of electrical wiring. Veranda is available only for the portion of the common area of each dwelling unit. Floor store to make holes in the concrete. Water, the floor is a communal area, dedicated space and drain pipes, gas pipes, moving parts, so that both can not be shared. If a range is allowed, even gardening can be used as a passageway for the evacuation.