What's the difference between building area and building area? How to calculate?

The building area refers to the sum of the horizontal areas of each floor of the building. Including usable area, auxiliary area and structural area.

The usable area refers to the net area directly used for production and living in the plane of each floor of the building.

Auxiliary area refers to the net area occupied by each floor of the building for auxiliary production or life, such as the area occupied by stairs, walkways, bathrooms and kitchens in residential buildings. The sum of the used area and the auxiliary area is called the "effective area".

Structural area refers to the area occupied by walls, columns and other structures in the plane of each floor of a building.

2. Coverage area:

For buildings, the construction area refers to the horizontal projection area of the land occupied or used by the building construction area, which is generally calculated according to the construction area. It is usually used to plan the building density of a plot, and the calculation formula is: building density = occupied area/land area.

Can refer to the square meter area of blank land, that is, the total area of land. The word "floor space" is often used when the project is first submitted for approval, which means this. The land area multiplied by the plot ratio is equal to the building area.

3. Calculation of floor area:

For buildings, the calculation formula is: building density = base area/land area.

For flat land, the building area multiplied by the plot ratio is equal to the building area.

4. Calculation of construction area:

Building area = the horizontal area of each floor of the building.

Extended data:

According to whether it produces economic benefits:

Beneficial construction area, non-beneficial construction area and necessary supporting construction area (non-beneficial part)

Buildings can generate economic benefits by selling, transferring, replacing, leasing and putting into operation. When estimating the buying and selling price, lease price, mortgage value, insurance value and tax value of real estate, it is often necessary to judge the final value according to the comprehensive analysis of the profitable part, non-profit part and necessary supporting part of real estate (or building).

According to the different functions used in the building:

Construction area of residential function, commercial function, office function, industrial function, supporting function and civil air defense function.

This division is mainly based on people's different use functions of buildings, which can better meet people's different needs in production or life. Of course, the economic benefits and purposes of different functions are basically different.

According to the composition of the housing construction area:

Construction area of complete houses = interior construction area+shared public construction area.

The interior construction area and the shared public construction area of a house are the total construction area owned by the owner of the house, and are also the two major elements of the registration of house ownership. The indoor construction area of a house refers to the construction area occupied and used by the owner of the house alone, which consists of three parts: indoor construction area, interior wall area and indoor balcony construction area.

From a professional point of view, the building area is a measure of the amount of building objects. The calculation basis refers to the horizontal projection area of the building's external walls or floors above columns, including balconies, corridors, basements, outdoor stairs and other ancillary parts of the building. Moreover, the building is required to have a solid upper cover and enclosure with a height of more than 2.20 meters. The significance of people's measurement of building area mainly considers the following aspects:

1, human beings need to build various activities or living places to meet the needs of social development, which is also one of the accumulation forms of social material wealth, also known as buildings, so it is an important economic indicator to evaluate national economic construction and people's material life.

2. It is an important basis for technical and economic analysis in the stage of planning and investment decision-making of construction projects, and it is also one of the bases for selecting budget indicators when preparing the preliminary design budget of projects.

3. It is an important technical index of the planning conditions of the construction project approved by the competent department of city planning administration, and it is also an important basis for the preliminary engineering investigation and construction drawing design of the project.

4. The basic data of the project budget and partial engineering quantity calculation is also the basis of calculating the technical and economic indicators such as project cost, engineering quantity and material consumption per unit construction area.

5. It is one of the basic data of transaction, lease, mortgage, tax collection, property service fee payment and heating fee payment in buildings.

6. Provide important basic data for the property registration management, property right confirmation, property right area confirmation and housing registration books of the housing management department, and also provide basic data for the national statistical department to summarize the market indicators of the real estate market, such as newly started housing area, construction area and completed housing area, so that the state can macro-control the development of the real estate market, release real estate market information in a timely manner, and effectively control the market development, thus better promoting the healthy development of the national economy.

References:

Baidu encyclopedia-coverage area

Baidu encyclopedia-construction zone