Hi, it is the duty of the builder to form the association as per the provisions of the Karnataka Apartment Ownership Act, 1972.
2. Hi, B Katha is also valid but when the "Akaram Sakaram" Scheme comes you have to apply before the BBMP for A katha.
3. For demanding extra money for BWSSB It is not as per agreement you can file a complaint before the Consumer Court for not providing BWSSB Connection and don't pay the amount and ask him to give it in writing for extra amount so you have evidence before the court.
4. It is the duty of the Builder to get Occupancy certificate if there is any violation BBMP will not issued OC so on this ground also you can file a complaint in Consumer forum.