builder cannot sell car parking slots . it forms part of common area and cannot be sold by builder . you can move consumer forum against builder and ask for refund of parking charges .

builders are required to furnish car parking plans to muncipial corporation . take inspection of parking plans submitted by builder . cross check whether area mentioned in plans is the same as offered to you by builder . society will have to allot car parking slots to members are per parking plans submitted to corporation

Parking slots cannot be sold by builders as they form a part of the common area. Parking area is to be dealt with by the society by formulating its own policies. Issue a legal notice to the builder and move the court to seek monetary damages from him.