How to seal the terrace is not illegal?

There is no uniform regulation on how to close the terrace, but buildings that change the appearance or function of the building without permission are illegal buildings.

Property approval

If the balcony must be sealed, it must be approved by the relevant property department, because the reason for not sealing the balcony is to consider the beauty and safety of the balcony.

Owner * * * owns

It depends on the right to use the terrace, mainly whether the terrace is owned by the owner. If it is owned by the owner, it is illegal to build a terrace or not.

Relevant regulations

If it is privately owned, you can check whether there are any clauses prohibiting construction according to relevant regulations.

Affect the living environment of others

If the terrace is privately owned and there are no relevant laws and regulations prohibiting the construction, it is not illegal to build a terrace in this case, but the premise is to ensure that it will not affect the living environment of others.