This is:

In Germany, for example, the tenant has no right to raise the rent even to the next tenant, not the current.
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I live in Berlin, renting an apartment. The tenant has the right to raise the apartment fee once every two years. This is legally stipulated. The contract of renting is written indefinitely. And the next tenant already has the right to increase the fee in accordance with the change in the market value of the housing. At least 30% if there are such prices on the housing market.