How to control the building height and calculate the floor area ratio index?

1. Objective: To standardize the design of building floors, rationally use urban space and underground space, improve the urban environment, and encourage the setting of overhead floors on the ground floor of buildings. These rules are formulated.

Two. Scope of application: The scope of application of these Detailed Rules covers commercial buildings, office buildings and residential buildings (including various apartments and townhouses) within the urban planning area of Hangzhou (excluding Xiaoshan and Yuhang), excluding industrial, warehousing, cultural, sports and educational buildings.

Third, the basic provisions:

1. The height of the residential building is more than 4.5 meters. When calculating the floor area ratio index, the building area is calculated by multiplying the building area by 1.5 times, regardless of whether there is interlayer on the floor. When the duplex living room (hall) is high indoors, it can be included in the floor area ratio according to its actual area.

2. When the height of an office building is 4.8m or above, whether there is a mezzanine or not, when calculating the floor area ratio index, the building area shall be calculated by multiplying the building area by 1.5 times. The floor area ratio of foyer, lobby, atrium, inner corridor and lighting hall can be calculated according to its actual construction area.

3. When the height of a commercial building is more than or equal to 5 meters, when calculating the plot ratio index, the construction area shall be calculated by multiplying the standard construction area by 1.5 times. The building height of large-scale commercial buildings (such as supermarkets, large shopping malls, specialty stores, restaurants, entertainment and other commercial buildings with concentrated functions) that reach more than 2,000 square meters can be appropriately increased according to functional requirements. The floor area ratio of foyer, lobby, atrium, inner corridor and lighting hall can be calculated according to its actual construction area.

4. Underground space: when the floor height is more than 2.2m, and the ceiling of basement and semi-basement is not more than 1.5m higher than the outdoor floor, it is not included in the plot ratio; When the local upper part is greater than 1.5m, the building area of this floor is included in the plot ratio. Outdoor floor due to terrain changes, should be calculated separately according to the above provisions.

5. Overhead floor: an overhead floor with a height of more than 3.0 meters is set on the ground floor of the building, and its construction area may not be included in the floor area ratio, but closed departments such as elevator shafts, hallways and aisles should be included in the floor area ratio. The overhead floor should meet the following conditions: landing with columns and shear walls, transparent sight and open space; It has no specific function, and only serves as a public open space for leisure, transportation and greening.

The overhead floor should be included in the building elevation.

Four, the right to interpret: the specific issues in the implementation of these rules shall be interpreted by the Municipal Planning Bureau.

5. Effective time: These Rules shall take effect as of the date of promulgation and adoption by the municipal government. Xiaoshan, Yuhang District can refer to these rules.

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