The owner of the second-hand house can bring a lawsuit to the court for breach of contract.
First, get the petition from the people's court of the jurisdiction where the case is located to apply for filing, and then wait for the court to accept it, and at the same time prepare the evidence materials. The court will serve the hearing announcement and notify both parties of the hearing time within seven working days, and bring all the materials to the court on the day of the hearing.
[Legal Basis]
In Article 126 of the Civil Procedure Law, the people's court shall inform the parties of the relevant litigation rights and obligations in the notice of acceptance of the case and the notice of response to the action, or orally inform the parties of the decision to accept the case.