1. Mortgaged houses can be bought and sold. However, you can only buy and sell if the following conditions are met. If you want to buy or sell a mortgaged house, you need to get the consent of the mortgagee, or the other party in the sale will repay the mortgage loan, then you can buy or sell the mortgaged house.

2. Legal basis: Article 406th of the Civil Code of People's Republic of China (PRC).

During the mortgage period, the mortgagor may transfer the mortgaged property. Unless otherwise agreed by the parties, such agreement shall prevail. If the mortgaged property is transferred, the mortgage right will not be affected.

Where the mortgagor transfers the mortgaged property, it shall promptly notify the mortgagee. If the mortgagee can prove that the transfer of the mortgaged property may damage the mortgage right, he may require the mortgagor to pay off the debt or deposit the proceeds of the transfer in advance with the mortgagee. The part of the transfer price exceeding the amount of creditor's rights belongs to the mortgagor, and the insufficient part is paid off by the debtor.

Article 407

The mortgage right shall not be transferred separately from the creditor's rights or used as a guarantee for other creditor's rights. Where the creditor's rights are transferred, the mortgage right guaranteeing the creditor's rights shall be transferred together, unless otherwise provided by law or agreed by the parties.

Second, what are the conditions of housing mortgage loan?

1. The mortgaged house should have obtained the house ownership certificate, and the mortgaged house must have clear property rights;

2. The borrower has complete disposition right and can register the mortgage;

3. The mortgagor must use the full value of the mortgaged house for mortgage loan;

4. The house can be legally listed and traded, which is easy to realize.