Converting a leasehold property to freehold in Kanpur, specifically with the Kanpur Development Authority (KDA), requires meeting certain criteria. Generally, the property must be a self-contained block of at least two flats, with no more than 25% non-residential use. Additionally, two-thirds of the flats need to be owned by qualifying tenants with leases longer than 21 years. You'll need to approach the KDA directly to understand their specific conversion rules and it's advisable to consult a local lawyer for personalised guidance.