How to verify whether a house is illegal? You can entrust a lawyer to investigate, or you can go to the local housing construction bureau for consultation and investigation. Generally, projects that are newly built or expanded without the approval of the land department and the construction department are illegal. At present, the only officially recognized identification method is the Rural Housing Land Use Permit and the Urban Construction Land Planning Permit. Buildings within the permitted area are not illegal buildings. This is the relevant law about your problem.
