There is a saying about his history:

Pooled area is a practice adopted by Li Ka-shing in related real estate development, which was later adopted by other Hong Kong developers. It is difficult for us to judge whether this statement is reliable or not.

However, according to the information we have found, the first discussion on pool area in domestic media appeared in a law journal of 1996, which involved a lawsuit of real estate transaction dispute of 1993, so it can be understood that there was pool area before 1993.

When a five-story building is divided into five parts and each floor is sold to one person, there is no dispute. Everyone can share the cost of the common area equally, because it is really used equally. However, when each floor is divided into several small apartments, it is troublesome. The appearance and occupied area of each apartment are different, so there is no way to divide it equally. It is easy to produce disputes and contradictions on various expenses.

Hong Kong real estate developers have come up with a solution. According to the mode of "convention", they distribute all the property rights of the land and the whole building to all residents in a certain proportion in the form of construction area, so what you spend money on is the construction area.

Then how to calculate the construction area of elevator shaft, lobby and sentry box? Deduct in turn according to the agreed proportion, and the rest is your usable area. This is the origin of the pool system. The original intention of pool is to share with the public.

Extended data:

Swimming pool area

Public building area refers to the building area shared by the property owner of the whole building and all public parts of the whole building. Including elevator shaft, pipeline shaft, stairwell, garbage chute, power distribution room, equipment room, public hall, aisle, basement, guard room on duty, etc. , as well as the construction area of the public service room and management room of the whole building, calculated according to the horizontal projection area.

* * * The construction area also includes the partition wall between the suite and the public building, and the construction area of half of the horizontal projection area of the external wall (including gables). Basements for independent use, carports, garages, guard rooms serving multiple buildings, management rooms and basements for civil air defense projects are not included in the * * * construction area.

Apportioned public construction area refers to the public construction area allocated by each set (unit) of commercial housing according to law. The property right of public building area and shared public building area belongs to the purchaser of the whole building, and the purchaser enjoys the rights and assumes the responsibilities in accordance with the provisions of laws and regulations.

References:

Swimming pool area-Baidu encyclopedia