Can I write my sister's name when buying a house?

Of course. The property you bought is registered in your and your sister's name, and the property right belongs to you and your sister * * *, and the property right belongs to * * *; When registering my sister, if there is no special explanation, my brother-in-law is also involved. Whether the house is personal property before marriage or the same property after marriage mainly has the following situations: 1. The house purchased in full by one party before marriage belongs to that party's personal property before marriage; 2. After marriage, * * * contributes the whole amount or mortgages it to the same property after marriage; 3. If one party buys a house in full before marriage and adds the name of the other party after marriage, it will be regarded as the same property; 4. After marriage, if one of the parents contributes in full and is registered in the name of that party, it belongs to his personal property; 5. After marriage, if one parent contributes in full and is registered in the names of both husband and wife, it belongs to the joint property of husband and wife; 6. If one party buys a house by mortgage before marriage and repays the loan after marriage, the share of the property repaid by * * * belongs to the same property; 7. After marriage, if one parent pays off all the money and registers it in the name of the other, it belongs to the joint property of husband and wife. Article 1087th of the Civil Code of People's Republic of China (PRC) stipulates that in case of divorce, the joint property of husband and wife shall be handled by mutual agreement; If the agreement fails, the people's court shall make a judgment based on the specific circumstances of the property and the principle of taking care of the rights and interests of the children, the woman and the innocent party. The rights and interests enjoyed by husband and wife in the contracted management of family land are protected according to law.