Succession certificate mandatory for legal heirs

My grandfather by relegion Hindu had a single marriage. He died without any will. My grandmother is still alive. My grandfather has 2sons and 1daughter(widow). My uncle has a daughter, my father has 2sons(including me) and aunt(widow) has a son. Is my understanding correct? That by Hindu Law the current legal heir of the immovable property (a residential building registered in the name of my grandfather) are my grandmother, uncle, my father and aunt?? None is in a plan to sell or transfer or reconstruct the building but to reside in the same jointly and amicably. Is a succession certificate mandatory in this case to establish the common title of the property by the legal heir???