Demolition of Prefabricated Slab Houses in Nanjing

There is no fixed standard for the demolition of prefabricated slab houses in Nanjing. It is not a case of 'must be demolished after 30 years' or 'unified demolition'. Only D-grade dilapidated houses (where the load-bearing structure has completely failed) need to be demolished, and this decision must be made in combination with factors such as the results of the house safety appraisal and urban planning.

I. Demolition Basis: Centered on the House Safety Appraisal Grade According to the four-grade classification standard in the 'House Safety Appraisal Report', prefabricated slab houses are classified into four grades—A, B, C, and D—based on their degree of danger:

• Grade A/B: The structure is basically safe or has local hazards. Usually, living conditions are improved through the renovation of old residential areas, such as adding insulation layers, updating pipelines, and repairing exterior walls, without the need for demolition.
• Grade C: Some load-bearing structures have insufficient load-bearing capacity. They may continue to be used through reinforcement and renovation (such as adding supports and repairing cracks). For example, a 60-year-old prefabricated slab building in Beijing, after being appraised as Grade C, achieved the return of residents to their original homes through reinforcement.
• Grade D: The load-bearing structure has completely failed, posing a risk of collapse. The demolition process must be initiated. However, D-grade prefabricated slab houses account for less than 4% nationwide, and there are relatively few actual cases requiring demolition.

II. Disposal Methods: Graded Treatment to Avoid a 'One-Size-Fits-All' Approach The management of prefabricated slab houses in Nanjing follows the principle of 'graded treatment', with the specific path depending on the appraisal results:

1. Old Residential Area Renovation: For Grade A/B houses, living conditions are improved through environmental improvement and facility updates.
2. Demolition and Reconstruction on the Original Site: If the house structure is severely damaged but the land value is high, it may be demolished and rebuilt according to the original plan, with residents returning to their homes.
3. Relocation and Demolition: Relocation and demolition will only be initiated when the house is Grade D and cannot be reinforced, or when it is required by urban planning or infrastructure construction projects (such as subway or road expansion).

III. Information Acquisition Channels Since whether a house is demolished is influenced by multiple factors, residents can learn about specific plans through the following ways:

• Pay attention to government announcements or notices from street communities to obtain information on area renovation.
• Consult the local housing and construction department to inquire about the house safety appraisal results and disposal plans.

Summary: The demolition of prefabricated slab houses in Nanjing is based on the safety appraisal grade and dynamically adjusted in combination with urban planning needs. There is no 'unified demolition' policy. Residents do not need to worry excessively about the age of their houses and should focus on the house safety status and official information releases.