A sanctioned plan is the government’s approval to build. It is not proof the project was built to that plan. That sign-off is the Occupancy Certificate (OC) — issued by the planning authority, the same body that approved the plan, not by RERA— and it isn’t in this record. Ask the builder for it, or check with the authority. Without an OC, banks may decline home loans, and any deviation from the sanctioned plan carries penalty or demolition risk.