How do I apply for a permit or registration number if I want to rent out my own main apartment on a daily or weekly basis?

You intend to let your own main apartment on a daily or weekly basis...

You do not require a letting permit (“Genehmigung”). You only need a free registration number (“Registrierungsnummer”). To obtain the registration number, proceed as follows:

„Ich beantrage hiermit eine Genehmigung zur Kurzzeitvermietung meiner Berliner Hauptwohnung für den Zeitraum vom … bis zum …. Ich werde meine Wohnung in Berlin während dieser Zeit nicht nutzen, weil ich, [andernorts arbeite/studiere/auf Reisen bin]. Während meiner Abwesenheitszeit möchte ich die Wohnung kurzzeitig vermieten.“

[= I hereby apply for a permit to let my main Berlin apartment on a short-term basis for the period from ... to .... I will not be using my apartment in Berlin during this time because I am, [working/studying/traveling elsewhere]. During my absence I would like to rent out the apartment on a short-term basis.”

That’s it!

You can obtain the permit in the following way:

Examples: 

“Internship abroad/international work assignment/holiday from...to...” 

“Regular brief absences for personal and/or work-related reasons at weekends/during the week and/or during the holidays of under 2/3/4/5/6 months during the year”.

That’s it!