Situated in a quiet residential suburb of Colombo known as the Cinnamon Gardens, it occupies an area of 15 hectares (with the Sports Complex) along the Rajakeeya Mawatha, bordered by Reid Avenue to the east; Kumarathunga Munidasa Mawatha (formally Thurstan Road) to the west and to the south its former premises, which now houses the Department of Mathematics of the University of Colombo.