Urban Backyard Container House

Placing container houses behind urban residences may involve illegal construction issues and requires careful consideration. The following provides a科普 (popular science explanation) on legality, renovation requirements, and application scenarios:

I. Definition of Legality
According to the 'Regulations on Residential Property Management in Shanghai' and the law enforcement practices of urban management departments in various regions, placing containers behind houses and renovating them into living spaces without approval constitutes illegal construction. For example, the owner of a restaurant in Lvxiang Town, Jinshan District placed a container behind the house as an employee dormitory and was identified as illegal construction due to the lack of approval procedures. Such actions are equivalent to building houses without a permit and require rectification responsibilities.

II. Renovation and Usage Requirements
To legally use container houses, the following conditions must be met:

1. Approval Procedures: It is necessary to apply for temporary building permits from planning and housing construction departments, clarifying the usage period and purpose.
2. Structural Safety: Containers must undergo anti-corrosion and load-bearing optimization treatments. For example, a company in Baotou City added C-shaped steel purlins between the bottom beams, enabling the stacked three-layer container to maintain structural stability.
3. Thermal Performance: A three-layer structure (outer layer of galvanized sheet, middle layer of rock wool insulation, and inner layer of PVC-coated steel plate) should be adopted, and an elevated layer should be added at the bottom of the container to block cold bridge conduction, meeting living comfort requirements.
4. Functional Zoning: It is necessary to reasonably plan the space, such as compressing the kitchen and bathroom to one end of the container to form a wet area and adopting integrated bathroom technology for waterproofing.

III. Legal Application Scenarios
Container houses can be legally used in the following scenarios:

1. Temporary Uses: Such as construction site dormitories, emergency shelters, and mobile police stations, which must comply with temporary building management regulations.
2. Commercial Innovations: Such as characteristic homestays and mobile shops, which require obtaining commercial business permits and meeting fire protection and hygiene standards.
3. Public Services: Such as community libraries and shared service stations, which must be included in urban public service facility planning.