According to the construction area or usable area, 90% of Changsha people have been cheated.

Is the decoration priced according to the construction area or the usable area? Most decoration companies intentionally blur this concept when signing contracts with customers, or inadvertently calculate by building area, in which the difference is more than 1000 or even tens of thousands. For the owners, it is very important to know the construction area and usable area in the decoration.

Definition of decorative area

Decoration area refers to the calculation of the content that needs to be measured in family decoration, which is roughly divided into walls, ceilings, floors, doors and windows.

Use zone definition

The usable area can be literally understood as the actual usable area of the householder. Professionally speaking, it refers to the sum of the net area directly used for production or life in the plane of each floor of a building.

Definition of building area

If the building area is larger than the usable area, it shall be calculated according to the usable area plus the area occupied by the wall. Professionally speaking, it refers to the sum of the floor area measured by the peripheral horizontal plane above the external wall of residential buildings. Generally speaking, the building area includes the usable area, which can be simply described as a place where floor tiles can be laid. The general usable area accounts for about 70% of the building area.

Difference between construction area and usable area

Difference 1: the construction area is greater than the usable area, and the usable area is the construction area minus the indoor wall area.

Difference 2: the use area is not used as the calculation of the purchase price, and the purchase price is calculated according to the size of the construction area.

Difference 3: The included space is different, and the construction area includes the usable area, half of the interior wall area, half of the exterior wall area and half of the household wall area. The usable area of the suite includes all occupied areas except the interior and exterior walls, and the sum of the net usable areas of the kitchen, dining room, living room and bedroom.

The swimming pool is not decorated, so by definition, the decoration should be priced according to the use area. If the quotation calculated according to the construction area and the quotation calculated according to the usable area are the same, then the total cost of decoration is quite different.

At present, most decoration companies in Changsha calculate the decoration expenses according to the construction area, and a few calculate the decoration expenses according to the use area. In fact, the decoration company is not a loss-making transaction, they are playing some tricks on the quotation or materials. Finally, no matter which calculation method is adopted, the decoration company will not let the decoration cost difference be too far. When the owner signs the renovation contract with the decoration company, it must be clear which part of the area the decoration expenses are calculated according to, and it should be clearly stated in the contract, so as to avoid wrangling when paying.

(The above answers were published on 2015-10-19. Please refer to the actual situation for the current purchase policy. )

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