You can demand the details of the increased super area.
The area of a property is often calculated in three different ways – carpet area, built-up area and super built-up area. Hence, when it comes to buying a property, this can leads to a lot of disconnect, between what you pay and what you actually get.
Carpet Area Based Pricing
For example, an apartment with a super-built area of 1,000 sq. ft in an upscale area in southern Kolkata has a saleable price of Rs.5,000 per sq. ft, which totals to a price of Rs.50 lakh. Let’s assume, out of this 1,000 sq. ft the carpet area (or the usable space excluding the space occupied by walls & common area) of the property is 700 sq. ft, and the rest 300 sq. ft is space for walls, common spaces like passages, staircases, lift-well etc. From now on, with the implementation of the new rule, buyers will be paying only for the carpet area of 700 sq. ft.
The Financial Equation and how it Affects you?
Irrespective of whether it’s super-built or carpet area, there wouldn’t be much difference as far as the net pricing of a property is concerned. Developers won’t be paying for the common spaces out of their own pocket, so they will adjust the price per sq. ft and charge the carpet area of 700 sq. ft at Rs.7143 to get their desired price of Rs.50 lacs for the apartment.
However in your case since it is exorbitant, you can demand the details and take him to legal forum for excess demand