2. The petitioner is into business of construction and sale of apartments, independent houses, villas and commercial spaces. On 28.01.2008, the petitioner obtained permission for construction of multi-storeyed residential complex building consisting of cellar, ground and seven upper floors. As per the norms prescribed by the respondent Municipal Corporation and the Hyderabad Metropolitan Water Supply & Severage Board, it is mandatory for such a building to provide for rain water harvesting structures. Initially, an amount of Rs.2,00,000/- was charged from the petitioner and thereafter, another amount of Rs.24,25,572/- was also charged to undertake such construction. The petitioner alleges that in spite of taking such huge amount, the rain water harvesting structures were not constructed and as there was inordinate delay, the petitioner had to undertake such construction so that he can obtain Occupancy Certificate. After constructing the appropriate structures, Occupancy Certificate was issued to the petitioner on 26.02.2013. Since the petitioner has undertaken the construction of required structures, it is incumbent upon the respondents to refund the amount collected from him. Asking to refund the amount, several representations are made, but no reply was furnished to the petitioner and amount is not refunded. One such representation was submitted to the first respondent Board on 07.11.2014.