Legal analysis: Property-free houses belong to small property houses. The main reason for the low price is that there is no land cost or the land cost is extremely low, and there is no formal development and transaction procedures, so the tax cost is also very low, so the price is cheap. However, small property houses are not protected by law, and the state explicitly prohibits the sale of small property houses.

Legal basis: Interpretation of the Supreme People's Court on Several Issues Concerning the Specific Application of Law in the Trial of Disputes over Urban Housing Lease Contracts.

Article 2 The lease contract concluded between the lessor and the lessee for the house that has not obtained the construction project planning permit or has not been built in accordance with the provisions of the construction project planning permit is invalid. However, if a construction project planning permit is obtained before the end of the debate in the court of first instance or the construction is approved by the competent department, the people's court shall deem it valid. "

Measures of People's Republic of China (PRC) Municipality on the Administration of Construction Permit for Urban Construction Projects

Article 5 To apply for a construction permit, the following procedures shall be followed:

(1) The construction unit shall obtain the application form for the construction permit from the issuing authority.

(two) the construction unit holds the building construction permits application form stamped with the seal of the unit and the legal representative, together with the supporting documents stipulated in Article 4 of these Measures, and applies to the issuing authority.

(3) The issuing authority shall issue a construction permit within fifteen days from the date of receiving the application after receiving the building construction permits Application Form and the attached supporting documents submitted by the construction unit; If the supporting documents are incomplete or invalid, it shall inform the construction unit of all the contents that need to be supplemented on the spot or within five days. After the supporting documents are complete, the examination and approval time can be postponed accordingly; Do not meet the requirements, it shall notify the construction unit in writing within fifteen days from the date of receiving the application, and explain the reasons.

In the process of construction, if the construction unit or the construction unit changes, it shall re-apply for the construction permit.