Is it illegal for the owner to dismantle the non-bearing wall?

Its behavior is not illegal. In the current "Administrative Measures for Interior Decoration of Residential Buildings", only the outer wall of non-load-bearing wall is stipulated, as long as it does not violate the prohibitive provisions of the law, it is ok. If the owner violates the prohibitive provisions in the Measures for the Administration of Residential Interior Decoration during the decoration process, the property management company can report it to the relevant administrative department, which will handle it instead of imposing a fine. If the owner's decoration behavior causes damage to the building structure or public facilities in the community, the property management company may, according to the provisions of the General Principles of the Civil Law, require the owner to bear the liability for damages and pay a certain amount of compensation for the repair, instead of a fine. If there is no actual damage, the owner does not need compensation.

legal ground

Article 54 of the Regulations of Shanghai Municipality on Property Management in Residential Areas.

Before applying for property delivery, the construction unit shall, jointly with the property service enterprise, inspect the property within the property management area, confirm the on-site inspection results, sign an agreement to undertake the inspection, and disclose the inspection results to the owners. Property inspection can invite the owner's representative and the housing management agency where the property is located to participate.

skill

The above answer is only for the current information combined with my understanding of the law, please refer carefully!

If you still have questions about this issue, I suggest you sort out relevant information and communicate with professionals in detail.