Can my aunt and uncle sell the house without my permission?

If your father was registered at the time of your grandparents' death, he automatically received the inheritance. Then you need to submit an application to the court to receive a decision. First, the father is recognized as the heir, and then you are recognized as the father's heir.

But if your father was not registered at the time of the death of his parents together with his parents, and there was no will (the father did not apply for inheritance), then you need to involve a lawyer to prove that you are the heir of the father and have the right on the house