The 6-8 weeks is generally consecutive, not per year, but German rental law doesn't have a hard number written down. Most landlords and courts consider anything over 6 weeks as establishing a "Dauerwohnrecht" which gives the guest tenant-like protections.

You should tell your landlord if the friend is staying more than 4 weeks total, even if they keep their other registration. If you don't, it could be considered a breach of your contract if your landlord finds out from the Hausverwaltung or neighbors.

If your friend reimburses you without a contract, that's legally a "Gefälligkeitszahlung" and fine for short stays, but for regular 2-week visits each month it looks like a rental relationship to the landlord. A proper Untermietvertrag makes everything clean and protects both of you.

For the contract type, you want a "Zeitmietvertrag für Untermiete" rather than a generic roommate agreement. That way you get the deposit handled properly and the exact dates are written down. It also makes it clear your friend is a subtenant with limited rights, not a permanent co-tenant who could refuse to leave.

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yeah the 6-8 weeks thing is per stay, not per year, so if your friend is here 1-2 weeks every month that's basically half the year and definitely not a visitor situation anymore. most landlords in berlin have a clause in the contract about long-term guests, and regular monthly visits will count as that pretty quickly.

for the money thing, honestly if you want to keep it above board you should talk to your landlord. berlin landlords can be weird about this but many are fine with a sublet if you frame it right. a proper untermietvertrag is the way to go, it protects both of you and makes it clear your friend isn't a permanent tenant. just check your lease first for any verbot of subletting.

the difference between "mitbewohner" and "untermieter" is mostly legal - as a roommate they'd have the same rights as you which could get messy if things go south. subtenant is cleaner, they're renting from you not the landlord. also your friend already has their anmeldung sorted so that simplifies things a lot, you don't have to deal with the bürgeramt headache

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The 6-8 week rule is about consecutive stays, not cumulative over a year. So if your friend is here for two weeks at a time with gaps in between, that's fine as long as each individual stay doesn't stretch past that window. Landlords in Berlin usually care about someone establishing residency and getting Anmeldung, which your friend already has elsewhere, so you're in a better spot.

You don't technically have to tell your landlord for short-term guests, but if your friend is here for a full week or two every month, that starts to look less like a visitor and more like a regular occupant. Some landlords in Berlin are strict about this, especially with the newer contracts that have a Zweckentfremdungsverbot clause. If you want to take money from your friend, you should absolutely get written permission first, because accepting rent without a proper sublease agreement can be grounds for a Kündigung.

A sublease (Untermietvertrag) is the cleaner option here. It makes it clear that your friend is a temporary tenant with defined rights and you're the Hauptmieter. Calling them a roommate in a contract can blur things legally and might give them more protections than either of you want. Just keep the sublease specific to the dates they're actually staying, and don't try to cover the whole month if they're only there half of it.

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The guide gets Prenzlauer Berg right for families but doesn't mention how good it is for solo travelers who want quiet. I stayed near Helmholtzplatz for a week and loved having the U2 line right there, it's about 12 minutes to Alexanderplatz. The Saturday flea market at Mauerpark gets packed but the food stalls are worth fighting through the crowd, especially the Turkish gozleme stand near the back. Just know that finding a grocery store open past 8pm in Prenzlauer Berg can be a hassle, so stock up early.

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I stayed in Schöneberg on my last visit and it was the right call. The morning market at Winterfeldtplatz on Saturdays is worth planning around. You can grab fresh produce and a crepe for breakfast, then walk to U-Bahn Nollendorfplatz in about five minutes. Mitte is only ten minutes by train but the neighborhood feels genuinely local.

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solid breakdown, i'd add that the Schöneberg mention is spot-on but the guide leaves out how good the U1 line is for getting around. from Nollendorfplatz you're at Warschauer Strasse in like 10 minutes and Kottbusser Tor in maybe 6, so you can hit both Kreuzberg and Friedrichshain without a transfer. my partner and i stayed near Akazienstrasse last year and paid 95 a night for a quiet room with a balcony, way better value than anything in Mitte. the Akazienstrasse itself has a couple of great italian delis and a small cinema that shows english-language films, worth a lazy afternoon

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