Which department should be responsible for the owner's unauthorized removal of the external wall?

Legal analysis: the demolition of the external wall by the owner without authorization is under the jurisdiction of the real estate administrative department of the local people's government at or above the county level.

Legal basis: Regulations on Property Management

Forty-eighth real estate administrative departments of local people's governments at or above the county level shall promptly handle complaints from owners, owners' committees, property users and property service enterprises in property management activities.

Fiftieth owners and property service enterprises shall not occupy or dig roads and sites within the property management area without authorization, which will harm the interests of owners.

Because of the maintenance of property or public interests, the owners really need to temporarily occupy or dig roads and sites, and shall obtain the consent of the owners' committee and the realty service enterprise; If it is really necessary for a realty service enterprise to temporarily occupy or dig roads and sites, it shall obtain the consent of the owners' committee.

Owners and property service enterprises shall restore the roads and sites temporarily occupied and excavated to their original state within the agreed time limit.

Fifty-second owners need to decorate the house, it should inform the property service enterprises in advance. The realty service enterprise shall inform the owners of the prohibited acts and matters needing attention in the house decoration.