The purchase of commercial housing maintenance fund has been paid with the heating fee for three years. Is it reasonable to pay the heating fee and be told that the housing area has increased by several square meters? Housing area is a matter between the developer and the Housing Authority, and has nothing to do with the property company. What's more, if your community is officially developed, there will be no sudden deviation in the area after three years, and there must be problems. You can refuse the unreasonable demands of the property, which is really bad. Complain to them with a house purchase contract or real estate license. Besides, your owner and the property management company are not managed, but cooperative!