There are seven aspects that can help the building owner to judge whether to demolish this area. First, if it is necessary to expropriate houses, it should meet the requirements of the national economic and social development plan, the overall land use plan, the urban and rural planning and the special planning. If there are other beneficial purposes and adverse factors, adulteration is illegal, but the overall judgment of this aspect is difficult. II. The announcement of expropriation requires that the decision on the expropriation of houses for the purpose of expropriation should be announced to everyone in a timely manner. The announcement should be accompanied by a compensation plan for housing expropriation and resettlement, and everyone can pay attention to whether there is any content that tells the expropriated person that he has the right to apply for administrative reconsideration, file an administrative lawsuit, etc. III. Requirements for the formulation of resettlement compensation As for the resettlement compensation plan, the proposed expropriation and resettlement compensation plan needs to be demonstrated and published, and the most important thing is to seek public opinions (the duration shall not be less than 30 days). If everyone disagrees, the government should organize a hearing and modify the plan according to the hearing. 4. The requirements of the standard plan for collection During the collection process, you can refer to whether the collection items conform to the standard plan. For example: 1. The development and reform department reviews whether the project conforms to the national economic and social development plan; 2. The urban and rural planning department reviews whether the project conforms to the urban and rural planning and special planning; 3. The land and resources department reviews whether the project conforms to the overall land use plan; 4. If the old city reconstruction and affordable housing projects need to be levied, they should be included in the national economic and social development plan of the previous year due to review. This part needs to be tested in combination with the information disclosure application. V. The requirements of the survey and statistical results of the housing area measurement should be noted that after the expropriation party organizes the survey and registration of the ownership, location, use, building area and other conditions of the housing, it should disclose the relevant information to the expropriated within the scope of expropriation. 6. The differential treatment of unlicensed houses can not be generalized as illegal buildings if they are unregistered buildings. Before making a decision on housing expropriation, the unregistered buildings within the scope of expropriation shall be investigated, identified and disposed of. If it is identified as a legal building or a temporary building that does not exceed the approval period, compensation shall be given. VII. Conditions for the selection of housing assessment institutions. For the selection of housing assessment institutions, attention should also be paid to the fact that they are selected by the acquiree through consultation. If consultation fails, they can be determined by majority decision, random selection, etc.