Is the property fee charged according to the contract area or the property area?

Q: My commercial housing sales contract stated that the construction area was 127 square meters, but when I received the house, I was told that the measured area had increased by 2 square meters, and I paid the balance according to the contract. However, the property manager said that my property management fee, heating fee and other expenses related to the construction area should be paid according to the measured area, but I only have a commercial housing sales contract that can explain the construction area, of which the measured construction area is 127, and I asked him to change it for me. A: Up to now, the heating fee and property fee of the house are still charged according to the registered area of the house property right, that is, the construction area. What is agreed in your sales contract is the temporary measured area of the house, and the final area is subject to the measured area data approved by the competent department of housing surveying and mapping. You can ask the developer to show you the measured area data of the house.