How to calculate the sales area of commercial housing

How to calculate the sales area of commercial housing
In accordance with the Interim Provisions on the calculation of commercial housing sales area and area sharing of public buildings in Beijing (Beijing property right [1998] No. 1,285th ): the sales area of a commercial housing refers to the sum of the construction area (that is, the construction area) of the set or unit purchased by the purchaser and the area of the public buildings to be shared. That is:

Commercial housing sales area = the sum of the construction area inside the set + the area of shared public buildings

I. Calculation Method of building area inside a set:

① Inner use area: the residential buildings are calculated according to the method specified in "Residential Building Design Specification" (GBJ96-86; other buildings shall be calculated in accordance with the methods specified in the design specifications for special buildings or in accordance with the design specifications for residential buildings.

② Inner wall area: maintenance or load-bearing walls around the used space in the housing unit. There are two types of shared walls and non-shared walls:

(1) The shared wall includes the separation wall between each set, the separation wall of the projection area between the set and the public building space, and the external wall (including the mountain wall ); half of the horizontal projection area of the shared wall is included in the area of the internal wall.

(2) the horizontal projection area of Non-shared wall walls is included in the area of the internal wall.

2. The area of public buildings shared by commercial housing mainly includes the following two parts:

(1) The area of public facilities and Management buildings whose functions serve the whole building, such as elevator shafts, stairwells, garbage tunnels, power change rooms, equipment rooms, public foyer and aisles;

(2) the partition wall between each unit and the public building space of the building and 50% of the horizontal projection area of the wall of the exterior wall (including the mountain wall.

The following spaces cannot be included in the public building area:

(1) used as an independent space rent, basement for sale, and carport.

(2) serves as the basement of the civil air defense project.

Calculation Formula of public building area:

Public Building Area = Area of the entire building-sum of the area of each set of buildings-used as an independent space rent and sale basement, carport, civil air defense project basement

Public building area sharing coefficient = public building area/sum of building area in each set

Area of shared public buildings = area of each set of buildings x area of public buildings

Therefore, the commercial housing sales area formula can also be shown:

Commercial housing sales area = construction area inside the Set (1 + public building area sharing coefficient)