There is no time, but a space limit in Berlin. You can rent out as much as you like if it's less than 50% of the space of your apartment you're actually living.

There is no time, but a space limit in Berlin. You can rent out as much as you like if it's less than 50% of the space of your apartment you're actually living. If it's over 50% or you are not living there at all, you need a permit.