Consequences of buying 2nd floor flat without permission

Willing to buy in 2nd floor flat but don't have permissions for it? Get guidance from our real estate experts from here.

I am planning to buy a 2nd floor flat in Krishnaja Hills, Nizampet, Hyderabad, Telangana 500049 , Gram panchayat area. But the builder is saying he will apply for BRS for the above 2floors also. Should I buy this property or not? Is there any demolition threat for the building in the future? Please give me a suggestion.