This is the area of the apartment excluding the thickness of the walls. In simpler words, if a carpet had to be laid the area that the carpet would cover
This includes the built up area of the flat together with the area under common spaces such as the lobby, lifts, stairs, open space around the building etc.
Flats would be provided with open to sky area with access from within the flat. This is called private terrace and can be used only by the occupants of that particular flat.
The proposed building set in the form of a drawing has to be submitted for sanction by the appropriate authorities. Once the sanction is obtained, it is called the approved building plan.
The city development authorities - for eq. The Chennai Metropolitan Development Authority CMDA is the appropriate authority for building sanctions in Chennai. This is a decentralized activity - the various panchayat union and municipal unions can accord sanction on behalf of the CMDA in respect of property located within their jurisdiction.
The universal rule is that the purchaser has to bear all expenses regarding registration. However if the seller and buyer mutually agree otherwise, then the seller would have to bear the expenses.
The non-judicial stamp papers are required to be purchased in the name of either the purchaser or seller. Generally it is bought in the name of the purchaser since he bears the expenses of registration.
The Sub-Registrar of the area, in whose jurisdiction the property is located, is the appropriate authority for knowing the guideline value of the property. This is also available on the internet.
Under Section 88 of the income tax you can claim benefit for the principle repayment, interest on loan is deductible u/s 24 from income from House Property.