Covered area refers to the area occupied by land, and the construction area should be added with the area occupied by space, and the construction area is generally larger than the occupied area.

For example, the building area of a building only refers to the area occupied by the first floor, part of which is also included in the green area, and the building area includes all the usable area. 1 The floor up to the top floor also includes corridors, etc. In the construction area calculated when buying a house, the area below 1.2 meters is not counted, the area below 1.8 meters is counted as half area, and the balcony is counted as half area.

If we look at the area by elementary school math problems, it is the area of this land or building, and the horizontal projection area of the land occupied by the planning objects built in this building. In the calculation, the total construction area of this building is generally selected.