My grandmother owned our house, but my uncle changed the ownership documents to his name. As her grandson, can I claim my rightful share in the property?

Yes, you can. Under Indian law, a grandson has a legal right to inherit property from his grandmother. You can file a legal claim to challenge the transfer of ownership to your uncle if it was done without your grandmother’s consent or was fraudulent. Consult a lawyer to understand the specific legal options available to you.