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No, there are only property related regulations.
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The upstairs renovation changed the bathroom to the downstairs above the kitchen, and the upstairs manure pit was facing my downstairs stove.
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The position of the toilet opening in the bathroom can be changed, but you need to discuss it with downstairs
It seems that in the regulations on the approval and management of construction projects, it is said that according to the approval drawings for construction, a little less can be built within the permitted volume, and more can not be built; If it is built, it must be rebuilt, and it must be re-approved; What you are talking about demolishing the balcony entity may fall under the category of remodeling.
This is a private matter for every family, and there is no explicit rule in the state, so if your daughter has already recognized him as her husband, why should you not recognize him as your son-in-law? Go with the flow, maybe the two of them have this fate, and you can face the reality.
But what is installed by an individual and affects others is definitely not allowed.
No specific provisions were found. However, the leakage is generally due to the pipe or water container ring upstairs, and the water leaks downstairs (the water flows to the lower place). Therefore, it is up to the owner of the pipe (vessel) to repair it.
There is no regulation for this, but safety comes first, and outsiders cannot enter and exit the monitoring room casually.