First of all, correct your opinion. The ownership of the house is subject to the house ownership certificate. I don't know what your room card is. If you own a private house, the house must have a real estate license. If you rent a public house, you should have a lease form. You must first understand the nature and ownership of the house. If you own the ownership or partial ownership of the house, you have the right to live in the house. If not, it depends on the master's wishes. In addition, if your grandfather's house belongs to your grandfather's house without his signature, according to the current system, it should be impossible to sell it to others without his signature. I suggest you go to the real estate department to check and consult.

In addition, if your father dies, you can be the first heir to inherit your father's estate, including your father's property.