1, first follow the room change procedure. Generally, this situation is a problem of housing quality. If the developer agrees, everything will be handled according to the process.

2. Change the purchase contract. If you change rooms, you must re-sign a new purchase contract in order to safeguard your legitimate rights and interests in the future.

3. Bring the relevant proof materials for changing houses, listen to the requirements of the bank, and apply for loans according to the new house. Dissolve the previous loan and re-sign the loan contract according to the procedure. Mortgage according to the area and price of the house.