Twelve situations are not included in the building area calculation

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Question: I want to purchase a commercial apartment in Nanchang, but I’m not sure which areas within the residential complex are included in the calculated floor area 　　Answer: In accordance with the \"Regulations on Real Estate Surveying\" and the Ministry of Construction’s latest \"Notice on Issues Concerning the Calculation of Building Area and the Registration of Property Rights\" (hereinafter referred to as the \"Notice\"), the following 12 situations do not qualify for inclusion in the building area: 1. Buildings with a floor height (height) of 2.20 meters or less (not including 2.20 meters), as well as buildings with sloping roof structures, are not included in the building area ； 　　II. For the space beneath the stairs, if the area of the stairs has already been included in the building area, then the space beneath them is not counted as part of the building area, regardless of whether it is utilized or not ； 　　III. The ground floors of public passages, buildings facing the street, and covered walkways that are used as public roads or alleys are not included in the building area, regardless of whether they have columns or any supporting structures ； 　　IV. Structures similar to balconies, porches, or verandas that are not connected to the interior areas are not included in the building area ； 　　V. Mezzanines, interlayers, technical floors, basements, and semi-basements with a floor height of less than 2.20 meters ； 　　VI. Elements that stand out on the house’s walls: fixtures, decorative columns, decorative glass facades, pilasters, base courses, steps, columnless canopies ； 　　VII. Uncovered covered walkways between buildings ； 　　VIII. The roof of the building, extensions on the roof, gardens on the roof, swimming pool ； 　　IX. Operating platforms and loading platforms within buildings, as well as spatial platforms in buildings and platforms for placing boxes and tanks in such spaces ； 　　X. Houses constructed using approach bridges, viaducts, and elevated road surfaces as rooftops ； 　　XI. Mobile homes, temporary houses, simple structures ； XII. Expansion joints between rooms of a building that are not connected to the interior spaces of the building ； Regarding the calculation of the building area relevant to housing ownership registration, where the \"Real Estate Surveying Standards\" provide no regulations or have unclear provisions, the rules set out in the \"Notice\" shall be applied temporarily: 1. Exterior wall surfaces. For the exterior walls on the same floor that consist of both main walls and glass curtain walls, the building area is calculated based on the main walls, with the wall thickness being determined according to the thickness of those main walls. When the wall thickness varies across different floors, calculations are performed separately for each floor. Metal curtain walls and curtain walls made of other materials shall be handled in accordance with the relevant regulations for glass curtain walls ； 　2. Irregular enclosures. If the horizontal projection of the perimeter of a balcony, porch, or elevated walkway exceeds the outer edge of its base slab, the floor area shall be calculated based on the horizontal projection of the base slab ； 　　3. Expansion joints. Expansion joints and settlement joints that are connected to any side of the interior, meet the general requirements of a building, and can be used properly should be included in the calculated floor area ； 　　4. Non-vertical walls. For houses with non-vertical walls such as inclined or curved walls, the floor area is calculated for sections with a height of 2.20 meters or more. If the wall of a building slopes outward and extends beyond the outer edge of the base slab, the building area is calculated based on the projection of the base slab ； 　　5. The building area of outdoor stairs is calculated as the sum of the horizontal projection areas on each floor ； 　　6. In the registration of property rights for a house, the parts within the living space that have functional uses but have a ceiling height of less than 2.20 meters shall have their respective rights clearly defined. Calculation of wall thickness. When the wall thickness varies across different floors, calculations are performed separately for each floor. Metal curtain walls and curtain walls made of other materials shall be handled in accordance with the relevant regulations for glass curtain walls. (According to the Information Daily)