The minimum exterior open spaces around buildings that are 55 meters or more, should be 16 meters. On sides where no habitable rooms face, a minimum space of 9 meters shall be left for heights above 27 meters.in this drawing show sufficient area of parking and other activities space Commercial buildings are buildings where commercial activities take place. Commercial buildings include office buildings, retail space, warehouses and more. This differs somewhat from commercial property, for more details of Commercial with landscape view download this file.