Legal analysis: It is illegal to buy a house only by land certificate, because there are clear regulations in our country now. To buy a house by oneself, the parties must first have complete documents and two documents. 1 is the land use certificate, which is the title certificate of our country.

Legal basis: Article 261 of People's Republic of China (PRC) Real Estate Management Law. The state practices a system of registration and certification of land use rights and house ownership.