This is a concept design for a multi-suite shopping building which utilizes the roof as a park like recreation area.
The roof would feature a reinforced structure with a thin layer of dirt laid ontop followed by a layer of green turf to give the area a natural look. An additional banister or tall fence might enclose the upper area while the stairs at the sides provide access.
Typical roof accessories, such as HVAC system, would be enclosed in a fence and/or raised up.