The Residential Tenancies Act, 2006 governs how those leases transfer to a new owner, so confirm the rent roll matches what tenants are actually paying before you list, not after a buyer's lender asks for it.
If a unit is unpermitted, its rent generally cannot be underwritten the same way a legal suite's can, which means a tenant-occupied unpermitted space may add less value than the rent itself suggests.
Documentation, not occupancy alone, is what makes a tenanted sale work. Get your hand-reviewed valuation from Joel Dyck.