(1) State-owned land use certificate:

The state-owned land use certificate is a legal document for units and individuals to use state-owned land and is protected by law.

(2) Construction project planning permit:

The construction project planning permit is the legal certificate for the construction unit and construction project to use the land. Without this permit, the land used by the unit is illegal, and its engineering construction is also illegal, so it is impossible to obtain the real estate ownership certificate.

(3) Construction land planning permit:

Construction land planning permit is a necessary procedure after handling the construction land planning permit.

(4) Construction permit for construction project:

The construction permit is the legal certificate for the construction unit to carry out the project construction, and it is also one of the main bases for the registration of house ownership. Construction projects without work permits are illegal and are not protected by law. The Construction Committee is responsible for the examination and approval of construction.

(5) Pre-sale permit for commercial housing:

The competent authority of the pre-sale certificate of commercial housing is the urban comprehensive development management office, and the certificate is uniformly printed, registered, approved and issued by the municipal development office.

The most important of the "five certificates" are the land use certificate and the pre-sale permit of commercial housing, indicating that the purchased house belongs to the legal transaction category.