At the time of purchase of the property you will need to pay stamp duty and regsitration charges that will add up about 5% of the cost stated in the Agreement for Sale.

Subsequently proeprty taxes will need to be paid every year that will be charged to you as part of the building maintenance fee by the Society that will manage the property.This tax will be about Rs.1 per sq ft.

If this is an Under construction property the builder will also charge you VAT + Service tax on each slabwise part payment that will be about 3% of the slabwise payment you make.