The house bought with the loan can be sold. In principle, you can't sell a house without paying off the mortgage, but if you still have a loan and want to sell it, you can use the down payment paid by the buyer to repay the loan, and then transfer the house to the buyer, so that you can sell the house yourself without paying back the loan. If the buyer's down payment is not enough to pay off the loan, only the seller can find a way to pay off the house loan or other ways to complete the transfer formalities. According to the regulations, the establishment, alteration, transfer and extinction of the real right of immovable property shall take effect after being registered according to law; Without registration, it will not take effect, except as otherwise provided by law.

Article 209 of the Civil Code of People's Republic of China (PRC)

The establishment, alteration, transfer and extinction of the real right of immovable property shall take effect after being registered according to law; Without registration, it will not take effect, except as otherwise provided by law. Natural resources owned by the state according to law may not be registered.

Article 2 10

The registration of real estate shall be handled by the registration agency where the real estate is located. The state implements a unified registration system for real estate. The scope, organization and method of unified registration shall be stipulated by laws and administrative regulations.

Article 2 1 1

When applying for registration, the parties concerned shall provide ownership certificate, property boundary, area and other necessary materials according to different registered items.