Before signing a contract for a new home, read how an area discrepancy is handled, and photograph and keep the promises in the sales brochure, the ads and the sand-table model

In plain words

If the contract says nothing else, and the area registered after handover differs from the contract by 3% or less, the price is settled on the actual area (refund the excess, make up the shortfall). If the difference is more than 3%, you can return the home, and the developer must refund your money plus interest within 30 days. Specific promises in ads about the community's homes and facilities, if they affect whether you buy, count even when they are not written into the contract.