Your grandmother can transfer the ownership of the house to her (paid or unpaid) through consultation with your father. Of course, your father can accept it or refuse it.
If your father refuses to transfer the ownership of the house to your grandmother, then your grandmother has the right to let the relevant departments demolish the house because your grandmother has the right to use the land. Of course, she may not be torn down, but she has the right.
If your father accepts it, then the ownership of the house and the right to use the land will belong to your grandmother! If your grandmother lets you live in your house, you will still live with Harmony III. If your grandmother won't let you live, you can rent your own house! After your grandmother is 100 years old, if there is no will, all her children will inherit the property and everyone will share it equally. At this time, if your father wants this house, he can negotiate with his other brothers and sisters and buy the inheritance inherited by them. Or sell the house and split the money.
If there is conclusive evidence that your father's other brothers and sisters have failed to fulfill their maintenance obligations, you can apply to the court to deprive them of their inheritance rights after your grandmother is 100 years old.