Housing area calculation

More troublesome. Below I list the specifications. Please take a closer look at the specification for real estate measurement.

People's Republic of China (PRC) national standard GB/T 17986-2000.

Unit 1: Regulations on Real Estate Survey

1, Scope This standard specifies the contents and basic requirements of urban real estate survey, and is applicable to the real estate survey of cities, towns, built-up areas, industrial and mining enterprises and institutions outside the built-up areas and their adjacent residential areas. Real estate surveys in other regions can also be referred to.

2. Reference Standards The clauses contained in the following standards constitute the clauses of this standard by being quoted in this standard. At the time of publication of this standard, all versions shown are valid. All standards will be revised, and all parties using this standard should explore the possibility of using the latest version of the following standards. GB/T 2260- 1995 administrative division code of the people's Republic of China GB 6962- 1986 1: 500,1:1: 2000 scale topographic map aerial photography.

Unit 2: Tu Tu CH1003-1995 Quality Evaluation Standard for Real Estate Surveying and Mapping Products.

3. Calculation of real estate area

3 1 1 Content area measurement of real estate area refers to horizontal area measurement. It is divided into two categories: housing area and land area calculation, in which housing area calculation includes housing construction area, shared construction area, property right area and use area.

3. 1.2 Building area The building area of a building refers to the horizontal projection area of the external wall (column) above the foot of the building, including balconies, corridors, basements, outdoor stairs, etc. , and it is a permanent building with a solid structure and a height of more than 2.20m (inclusive).

3. 1.3 The usable floor area of the house refers to all available indoor space areas of the house, calculated according to the horizontal projection of the interior wall of the house.

3. 1.4 The property right area of a house refers to the construction area of the house legally owned by the property owner. The area of housing property rights shall be determined by the administrative departments of real estate of municipalities, cities and counties directly under the central government.

3. 1.5 Shared building area refers to the building area jointly occupied or used by all property owners.

3. 1.6 requirements for area measurement. Various area measurements must be independently measured twice, and the difference should be within the specified tolerance range, and the middle value should be taken as the final result. The measuring distance should be measured with a tape measure that has passed the verification or other instruments and tools that can achieve the corresponding accuracy. The area is in square meters, that is, 0.0 1 ㎡.

3.2 Relevant regulations on calculation of building construction area

3.2. 1 Scope for calculating the total construction area.

A) Single-storey houses with permanent structure, with a construction area of one floor; Multi-storey residential buildings are calculated according to the total construction area of each floor.

B) Calculation of the construction area of mezzanine, interlayer, technical layer, elevator room, etc. where the inner layer of the house is more than 2.20 m high.

C) The area of the passage, hall and hall passing through the house shall be calculated as one floor. The corridor part of the foyer and hall, which is more than 2.20 m high, should be calculated according to its horizontal projection area.

D) The area of stairwell, elevator (sightseeing elevator) well, elevator well, garbage chute and pipeline well shall be calculated according to the natural floor of the building.

E) The house is a permanent building in the air, and the stairwell, water tank room, elevator machine room and sloping roof with a height of more than 2.20 m are only calculated according to their peripheral horizontal projection plane.

F) A totally enclosed balcony with cantilevered buildings shall be calculated according to its peripheral horizontal projection area.

G) Outdoor stairs with permanent structure and cover are calculated according to the horizontal projection area of each floor.

A) The corridor with columns connecting houses and the corridor with columns between two houses shall be calculated according to the horizontal projection area of the column periphery.

B) The permanently closed overhead corridor between houses is calculated according to the horizontal projection area of the periphery.

C) Basements, semi-basements and their corresponding entrances and exits with a height exceeding 2.20m shall be calculated according to the horizontal projection area of the periphery of the external wall (excluding light wells, damp-proof layers and protective walls).

D) porches and doors with columns or retaining structures shall be calculated according to the horizontal projection area of the periphery of columns or retaining structures.

E) If the glass curtain wall is used as the external wall of the house, it shall be calculated according to the horizontal projection area of its periphery.

F) The carport with columns in the permanent building is calculated according to the horizontal projection area of the column periphery.

G) For houses built on slopes, hanging feet should be used as overhead floors. If there is a retaining structure, it shall be calculated according to the peripheral horizontal area of the part with a height of 2.20m or more. ..

H) If the house with expansion joints is connected to the interior, the construction area shall be calculated by expansion joints.

3.2.2 The calculation scope is half of the construction area.

A) The corridor and eaves gallery connected to the house and covered without columns shall be calculated as half of the horizontal projection area of the periphery of the enclosure structure.

B) If the porches, carports and sheds with independent columns and single-row columns are permanent buildings, it shall be calculated as half of the horizontal projection area of the upper cover.

C) The balcony and corridor that are not closed shall be calculated as half of the horizontal projection area of the periphery of the enclosure structure.

D) Outdoor stairs without roof shall be calculated according to half of the horizontal projection area of each floor.

E) The permanent overhead corridor whose top cover is not closed shall be calculated as half of the peripheral horizontal projection area.

3.2.3 The scope of construction area is not calculated.

A) mezzanine, mezzanine, technical layer, basement and semi-basement with a height less than 2.20m.

B) Components, fittings, decorative columns, decorative glass curtain walls, cribs, pedals, steps, pillar-free awnings, etc. Highlight the wall of the house.

C) Overhead corridor without cover between houses.

D) ceiling, platform, garden and swimming pool of the house.

E) Operating platform, feeding platform in the building and platform for placing boxes and cans in the building space.

F) The ground floor of arcades and street buildings is used as the passage part of roads, streets and alleys.

G) Houses built with approach bridges, elevated roads, viaducts and sidewalks as roofs.

H) Mobile homes, temporary houses and simple houses.

I) Independent chimneys, pavilions, towers, tanks, pools, underground civil air defense trunk lines and branch lines.

J) Expansion joints between houses not connected with rooms.

3.3 Calculation of land area

3.3. 1 Measuring range of land area The land area is measured in hills, including housing area, land area for other uses and land area of various types.

3.3.2 The following land is not included in the land area:

A) Cold alley, roadway or gap with unclear ownership.

B) Public land such as roads, streets and lanes within the municipal jurisdiction.

C) Rivers, ditches and sewage ditches for public use.

D) The land that has been requisitioned, allocated or belongs to the original real estate license needs to be used for municipal construction with the approval of the planning department.

(five) other areas that are not included in the scope of land use according to regulations.

3.3.3 Calculation method of land area The calculation of land area can adopt coordinate analytic method, field distance method and graphic method.

3.4 Method and accuracy requirements of area measurement

3.4. 1 coordinate analysis method

A) Calculate the area according to the data in the boundary point coordinate result table. 1ns = Xi (yi+1-yi-1) .................................................................. (18) 2 I =1or 1ns = yi (. Xi ordinate of boundary point, m; Yi—— abscissa of boundary point, m; N-the number of boundary points I-the serial number of boundary points, arranged clockwise.

B) Calculate the area error according to the following formula. 1n ms = mj8d2i- 1, I+1I =1.............................................. (20) where: ms-area error, ㎡; Mj—— the point median error specified by the corresponding grade boundary point, m; D I- 1, I+ 1- diagonal length of polygon, m.

3.4.2 Field distance method

A) Regular graphics, which can directly calculate the area according to the side length measured in the field; Irregular figures are divided into simple geometric figures, and then the areas are calculated separately.

B) The area error shall be calculated according to the provisions of 3.2.6, and the applicable scope of its accuracy grade shall be decided by the real estate administrative departments of each city according to the local actual situation.

3.4.3 Graphic method can be used to measure the area on the drawing, such as meter-integrating method and geometric figure method. The area measurement on the drawing shall be carried out twice independently. The area difference of secondary measurement shall not exceed the following formula: △ S = 0.0003 m s …………………………………………………………………………………………………………………………………………………………………………………………………… (21), where S-measured area, ㎡; Denominator of m scale of chart. When measuring the area by graphic method, the graphic area should not be less than 5cm2. The distance on the map should be accurate to 0.2 mm.

4, change the measurement

4 1 general provisions

4. 1. 1 Classification of change measurement Change measurement is divided into state change measurement and ownership change measurement.

4. 1.2 Measurement content of status quo change

A) Building, demolishing, rebuilding and expanding houses, and changing the building structure and floors;

(b) Damage and loss of houses, including total or partial demolition, collapse and burning;

C) Changes in fences, fences, fences, barbed wire fences and other ancillary facilities of houses;

(d) Widening and rebuilding roads, squares and rivers, and changing the boundaries of rivers, lakes, ditches and ponds;

E) change of place names and house numbers; F) Changes in the classified area of houses and their land use.

Appendix B (Prompt Appendix) Allocation of Building Area and Common Parts of Complete Houses.

B 1 calculation of construction area of complete house

B 1. 1 Building area of the whole house The indoor building area of the whole house consists of three parts: the usable area of indoor houses, the area of interior walls and the building area of indoor balconies.

B 1 2 usable area of interior house The usable area of interior house is usable area of interior house, and the horizontal projection area is calculated according to the following provisions:

A) The usable area in the suite is the sum of the space areas such as bedroom, living room, lobby, aisle, kitchen, bathroom, storage room and wardrobe.

B) Stairs in the suite are included in the usable area according to the total area of natural floors.

C) Chimneys, ventilation pipes and tube wells not included in the structural area are included in the usable area.

D) Interior wall decoration thickness is included in the usable area.

B 1.3 interior wall area refers to the area occupied by maintenance or load-bearing walls or other load-bearing supports around the use space in the suite, in which the shared walls such as partitions between suites, partitions between suites and public building spaces, and external walls (including gables) are included in the interior wall area of the suite according to half of the horizontal projection area. The self-owned walls in the suite are included in the wall area of the suite according to the horizontal projection area.

B 1 4 set of indoor balcony construction area is calculated according to the provisions of 8.2. The building area of the balcony in the suite is calculated according to the horizontal projection area between the balcony periphery and the external wall of the house. The closed balcony is calculated according to the horizontal projection, and the unsealed balcony is calculated according to half of the horizontal projection.

B2 Formula for Handling and Distributing Common Area

B2. 1 The contents of shared common area include shared housing construction area and shared housing land area.

B2 Principles of Dealing with Public Areas in the New Protocol

A) If both parties to the property right have legal ownership to divide the document or agreement, it shall be implemented according to the provisions of the document or agreement.

B) If there is no document or agreement on the division of property rights, it can be shared according to the construction area of the relevant house.

B2 3 The formula for sharing the common area is as follows: Δ Δ δδSi = K Si∑δSi K =∑Si, where k is the area sharing coefficient; Si-construction area shared by each unit, ㎡; Δ Δ Si —— sharing area of each unit participating in sharing, ㎡; ∑δSi—— total area shared, ㎡; ∑Si—— the total construction area of each unit participating in the apportionment, ㎡;

B3 Share the common building area

B3 1 The shared building area includes: elevator shaft, pipeline shaft, stairwell, garbage chute, power distribution room, equipment room, public hall, corridor, basement and guard room on duty. , as well as the construction area of public buildings and management buildings serving the whole building, are calculated according to the horizontal projection area. The total construction area also includes half of the horizontal projection area of the partition wall and external wall (including gables) between the suite and public buildings. 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 total construction area.

B3 2 Calculation method of total construction area The total construction area of the whole building minus the sum of all sets of construction areas of the whole building, as well as the construction areas of basements, carports, garages, guard rooms, management rooms and civil air defense projects that have been used independently, is the total construction area of the whole building.

B3 3 Sharing method of shared building area

A) The allocation method of shared construction area of residential houses is based on residential houses. According to the method and calculation formula of B2, the shared construction area of each house is obtained according to the interior construction area of each house.

B) Allocation method of commercial and residential shared floor area First, according to the different functions of residential and commercial buildings, the shared floor area of the whole building is divided into residential part and commercial part, that is, the shared floor area of the whole building obtained by residential part and the shared floor area of the whole building obtained by commercial part. Then the residential and commercial parts will share the allocated area respectively. Residential part: Add the shared floor area of the building and the shared floor area of the residential part itself, and calculate the shared floor area of each house according to B2 method and formula. Commercial part: add the shared floor area and your own shared floor area to each floor according to the proportion of the floor area, as a part of the shared floor area, add it to the shared floor area to get the total floor area, and then allocate it to each floor according to the proportion of the shared floor area of each house to find out the shared floor area of each house.

C) Allocation method of multi-functional comprehensive building allocation construction area The allocation construction area of multi-functional comprehensive building is allocated according to their respective functions and with reference to the allocation calculation method of commercial and residential buildings.