Düsseldorf – October 28, 2026 -- Landlords who have rented to the same tenants for at least 20 years collect an average net rent of €8.29 per square meter, against €16.20 on a new contract, roughly half. The figures come from the Vermieterspiegel 2026, published by property software provider immocloud with scientific support from EBS University for Business and Law. The study analyzed anonymized data from running leases in twelve large German cities.