1) Floor area ratio: that is, the ratio of the total building area of ??various types in the planned plot to the land area. The calculation formula is: floor area ratio = total building area/land area

Volume The upper and lower limits of the rate can be set according to needs. The lower limit of the floor area ratio is to ensure the efficiency of land development and prevent the waste of land caused by unprofitable or low-profit development. The upper limit on floor area ratio prevents overloading of urban infrastructure caused by excessive development. The floor area ratio can also be divided into all building floor area ratios, public building floor area ratios, residential building floor area ratios, etc. according to different building uses.

(2) Building density: that is, the building density of each building in the planned plot The ratio of the base area to the plot area, calculation formula: building density = building base area/plot area

(3) Greening rate, also known as green space rate: refers to the planned plot The ratio of the total area of ??various types of green space to the planned land area, calculation formula:

Green space rate = green space area/land area

The green space rate is usually controlled by a lower limit. The green spaces here include public green spaces, green spaces next to houses, and green spaces belonging to public service facilities (green spaces within the road red lines), excluding artificial green spaces on rooftops and terraces. Sculptures, pools, pavilions and other small green buildings that occupy no more than 1% of the public green space can be regarded as green space.

The so-called "floor area ratio" refers to the ratio of the total building area to the land area of ??a community. Building density refers to the ratio of building base area to parcel area within a specific "parcel".

For developers, the floor area ratio determines the proportion of land cost in a house, while for residents, the floor area ratio is directly related to the comfort of living. The same is true for the greening rate. The greening rate is higher, the floor area ratio is lower, and the building density is generally lower. The less area developers can use to recover funds, and the more comfortable residents are. These two ratios determine whether the project will design a community from the perspective of people's residential needs or purely from the perspective of making money. For a good residential area, the floor area ratio of high-rise residential buildings should not exceed 5, the floor area ratio of multi-story residential buildings should not exceed 3, and the greening rate should not be less than 30. However, due to land cost constraints, not all projects are feasible. The floor area ratio is about 50% lower than the net floor area ratio. Both indicators are legal. Unless otherwise specified, when talking about floor area ratio, it generally refers to net floor area ratio. However, the state does not explicitly stipulate that developers can only promote the net floor area ratio. Therefore, some developers take advantage of legal loopholes and convert the net floor area ratio into gross floor area ratio for publicity. House buyers do not understand the mystery and think that the community's The floor area ratio was really low, and I realized I had been deceived after I moved in. What is floor area ratio? According to the explanation of the "Chengdu Technical Regulations on Land Use and Building Planning Management (Trial)", the floor area ratio is the ratio of the sum of the building areas above the ground to the building land area. Floor area ratio and building density are directly related to living comfort. The lower the floor area ratio and the smaller the living density, the higher people's living comfort will be, and vice versa. But for developers, the floor area ratio determines the proportion of land cost in house prices and the gold content of the land being developed. Therefore, the higher the floor area ratio, the greater the developer’s profit.

For example:

The total area is 100,000 square meters, the total construction area is 100,000 square meters, and the floor area ratio is 1

The total area is 100,000 square meters , with a total construction area of ??150,000 square meters and a floor area ratio of 1.5

A total area of ??100,000 square meters, a total construction area of ??80,000 square meters and a floor area ratio of 0.8

The floor area ratio exceeds Small, the smaller the living density, the floors are relatively low, and relatively comfortable. The larger the floor area ratio, the opposite is true.

It is not recommended to buy if the floor area ratio exceeds 5

I hope it can help you