How to calculate the use area of shops, including the area of walls and columns?

As far as the laws and regulations of real estate surveying and mapping are concerned, the national standard is "Code for Real Estate Surveying and Mapping", and there are also corresponding detailed rules for the implementation of real estate surveying and mapping in various places, which will be more or less different from place to place. Now it is generally calculated according to the construction area, that is, the actual use area+pool area.

The pool calculation method is: pool coefficient = pool area/(divided) interior area, and interior area = building area-pool area.

According to the Code for Calculation of Building Area of Building Engineering and its annexes, it is defined as: building area = effective area+structural area = usable area+auxiliary area+structural area. The area that the owner can directly use is called "usable area", commonly known as "floor tile area".

The building area includes walls, columns and cavities less than 0.3 square meters. The actual usable area does not include walls, columns and cavities. This is the difference between the building area and the actual use area.

1, the use area is written in the contract, indicating that the developer is an amateur. Whether it is the real estate mapping report or the final title certificate, there will be no words "interior area", only: construction area, interior area and pool area.

2. The usable area usually refers to the internal area of the sleeve. The interior area is calculated from the center line of partition wall and entrance wall. If there are columns on the wall or inside the house, these columns will also be divided into indoor areas.

3. If you are the store number. 1, there will be a partition wall between you and Store 2. If the wall thickness is 240 mm, when calculating the internal area of this wall, it will be divided into Store No. 1 20mm to WarehouseNo.1and Store No.2, respectively.

4. As far as the laws and regulations of real estate surveying and mapping are concerned, the national standard is "Code for Real Estate Surveying and Mapping", and each place also has corresponding detailed rules for the implementation of real estate surveying and mapping, which will vary from place to place, but how to calculate the interior area is definitely the same.

Extended data:

The National Unified Construction Area Calculation Rules is a normative document issued by the State Economic Commission in document 1982, and its main calculation rules are as follows:

1, calculate the building area range.

(1), a single-story building, regardless of its height, is calculated as one floor, and its construction area is calculated as the horizontal area above the external wall of the building. If a single-story building has several floors, the building area should also be calculated.

(2) For high-low span single-story buildings, if the construction area needs to be calculated separately, when the high span is a side span, the construction area shall be calculated by multiplying the horizontal length between the outer surfaces of gables at both ends above the foot by the horizontal width between the outer surfaces of the outer walls above the foot and the outer lines of the high-span columns; When the high span is a middle span, its construction area should be calculated by multiplying the horizontal length between the outer surfaces of gables at both ends above the foot by the horizontal width between the outer lines of the central column.

(3) For multi-storey buildings, the construction area is calculated according to the sum of the construction areas of each floor, and the bottom floor is calculated according to the peripheral horizontal area above the toe of the external wall of the building; The second floor and above are calculated according to the horizontal area of the external wall.

(4) Basement, semi-basement, underground workshop, warehouse, shop, underground headquarters and other construction areas. The corresponding entrances and exits are calculated according to the horizontal area of the periphery of the external wall (excluding light wells, moisture-proof layers and their protective walls).

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