Within 30 days. As of March 2, 2023, KLOC-0/day, the real estate license for self-built houses was examined and prepared by the public security organ of Mianyang real estate information publicity platform, and all the real estate registration materials were complete, which met the requirements of relevant policies and regulations of the National Development and Reform Commission. The real estate registration agency accepts and completes the real estate registration within 30 days. Property ownership certificate A certificate that a property buyer obtains the legal ownership of the house through transactions and can exercise the right of possession, use, income and disposal of the purchased house according to law.