How to calculate the area inside the suit

How to calculate the area inside the suit

At present, there are three areas in the house purchase contract, one is the building area, the other is the shared area
The building area includes the built-in area and the shared area
The built-up area is the use of indoor area plus the wall area
The shared area is calculated by multiplying some public facilities in the community and the public part in the corridor by the shared area
The calculation formula of the built-in area is: built-in area = used area + wall area + balcony area
1. The calculation of the usable area of the apartment shall comply with the following provisions: (1) the usable area of the apartment includes the total area of the bedroom, living room, hall, aisle, kitchen, toilet, false floor, toilet, storage room, wall cabinet and other household doors; (2) the staircase in the room of the jump floor residence shall be included in the usable area according to the total area of the natural floor; (3) the chimney and airway not included in the structural area Equal area
2. Calculation of wall area: there are public wall and non-public wall in the maintenance or load-bearing wall around the use space of each new house
The partition wall between the new residential units, the partition wall between the new residential units and the public building space, and the external wall (including the external gable) are all public walls. The public wall is included in the wall area of the new residential unit according to half of the horizontal projection area
Non public wall is also included in the wall area of the set according to half of the horizontal projection area
The thickness of interior wall decoration is included in the area of interior wall
3. Calculation of balcony building area: (1) the building area of the closed balcony originally designed shall be calculated according to its peripheral horizontal projection area; (2) the building area of cantilevered balcony (bottom balcony) shall be calculated according to half of its floor horizontal projection area; (3) the building area of concave balcony shall be calculated according to half of its net area (including parapet wall area); (4) cantilevered and concave balcony, The construction area of the overhanging part is calculated as half of the horizontal projection area of the bottom plate, and the construction area of the concave part is calculated as half of its net area