Latest Answer: I am agree with Hamsika and Bhaskar. Without a valid OC, your occupancy is illegal as it can be classified as an unauthorised structure by the authorities.
OC is crucial while applying for a home loan or loan to purchase a resale flat. You cannot even sell your property without a valid OC in hand.
Key amenities like water, sewage connection, electric supply, etc, can be disconnected in case you do not have an OC