You can also go to the Housing Authority to inquire about your own house ownership certificate information (including: owner's name, house ownership certificate number, registration approval date, building area, design purpose of the house, ownership source, whether the house is mortgaged, whether it is sealed up, etc.). ), you need to bring your identity certificate and house ownership certificate to the archives or window of the local housing authority (real estate trading center, housing authority, housing management office) to inquire about the house ownership certificate.