All guides, by topic

Tenant rights in Germany: rent brake (§ 556d BGB), rent increase, notice, deposit, rent reduction, service charges – the key figures. Free rent check.

Read the article 31 October 2026

Cosmetic repairs in your German lease: which clauses are invalid, what § 535 and § 548 BGB say, the six-month deadline and what to do when you move out.

Read the article 29 October 2026

Rent increase in Germany: what § 558 BGB allows, the 20 or 15 per cent cap, your deadline to respond, and when a free rent check is worth it.

Read the article 31 October 2026

Rent reduction under § 536 BGB: when you may cut the rent, how much you can deduct and how to report the defect to your landlord correctly.

Read the article 29 October 2026

Tenant protection in Germany explained: rent brake (§ 556d BGB), rent increases, deposit, notice periods and service charges – the key numbers and deadlines.

Read the article 29 October 2026

Termination of a tenancy in Germany: the landlord needs a reason (§ 573 BGB), notice runs three to nine months (§ 573c BGB), and you can object on hardship.

Read the article 31 October 2026

Rent control in Germany explained: what the Mietpreisbremse (§ 556d BGB) says, who it covers, exceptions and how to lower your rent with a free rent check.

Read the article 31 October 2026

Rent control in Cologne applies city-wide until end of 2029. See the exceptions and how tenants can lower rent and reclaim overpaid rent with CONNY.

Read the article 31 October 2026

Rent control Berlin: the Mietpreisbremse applies to leases signed since 1 June 2015, extended to end of 2029. Check exceptions and how to lower your rent.

Read the article 31 October 2026

Lower your rent with no cost risk: CONNY only gets paid if your rent goes down, usually by your landlord. How our success-based promise works for tenants.

Read the article 31 October 2026

Mietspiegel Germany: how the rent index sets the local comparative rent, simple vs qualified index, and how to check your rent under the Mietpreisbremse.

Read the article 31 October 2026

Lower your rent without fear of the landlord: invoking the Mietpreisbremse is your legal right and no ground for termination. CONNY explains and enforces it.

Read the article 31 October 2026

Landlord offering a lease addendum instead of a new lease? Learn when the rent brake still applies, which addenda fail in court, and get a free rent check.

Read the article 31 October 2026

Rent control in Munich applies citywide until end of 2029. Check whether your rent is over 10% above the local comparable rent and reclaim overpaid rent.

Read the article 31 October 2026

Rent brake landlord tricks: furnished flats, fixed-term leases, addenda, commercial-use clauses – why they often fail in court. Check your rent free.

Read the article 31 October 2026

Rent control in Hamburg applies city-wide to leases signed since 11 July 2018, until end of 2029. Check your rent free with CONNY – no cost risk.

Read the article 31 October 2026

Rent control in Leipzig applies to leases signed since July 2022, until June 2027. Check for free and reclaim overpaid rent with CONNY.

Read the article 31 October 2026

Rent control applies across Frankfurt for leases signed since June 2019, with new rules on the way. Check for free whether your rent is too high.

Read the article 31 October 2026

Rent control despite modernisation? Exempt only after a comprehensive refurbishment (§ 556f BGB), about a third of new-build costs. Free rent check.

Read the article 31 October 2026

Rent control in Hamburg: Lilli from Barmbek pays €150 less rent a month with CONNY. In the interview: her doubts, how it went and the result.

Read the article 31 October 2026

Timothy and Peta paid €750 cold rent for 60 m² in Friedrichshain. CONNY's Mietpreisbremse check cut it by about €200 a month, settled out of court.

Read the article 29 October 2026

How Stiftung Warentest and Finanztip rate CONNY's rent brake (Mietpreisbremse) service, what they quote, and why they recommend it to tenants.

Read the article 29 October 2026

Review period: three to six months. Service charge retention only up to the expected back payment. Three years for you, six months for the landlord.

Read the article 29 October 2026

Getting your rental deposit back after moving out: how long the landlord may hold the deposit for service charges and how you reclaim it.

Read the article 29 October 2026

The Berlin Mietendeckel was struck down in 2021. The Mietpreisbremse (§ 556d BGB) still applies: how to cut rent that is more than 10 % above the local rate.

Read the article 29 October 2026

Mietpreisbremse flat share story: Tom's Berlin flat share paid almost €250 too much rent. How they cut it with CONNY – no cost risk.

Read the article 29 October 2026

Termination without notice: you only have to leave once a court rules. Grounds under § 543 BGB, and paying arrears in the grace period cures the notice.

Read the article 29 October 2026

Mietpreisbremse: 7 reasons to lower your rent now. CONNY tenants save around €300 a month on average, with no cost risk and a free rent check.

Read the article 29 October 2026

BGH ruling VIII ZR 228/23: when subletting is allowed, why a profit can cost you the permission and what tenants must now watch under § 553 BGB.

Read the article 28 October 2026

Mietrecht II 2026: furnishing surcharge cap, index rent cap, grace-period payment. What the government's draft tenancy law reform changes for tenants.

Read the article 28 October 2026

Rent control applies in shared flats: max. 10 % above the comparable rent (§ 556d BGB). What applies to main tenants, subtenants and individual contracts.

Read the article 28 October 2026

Sara was paying €346 too much rent every month. With CONNY she cut it by €237.91. Check your own rent for free now.

Read the article 28 October 2026

Rent control customer story: a CONNY customer cut his rent by €108 a month – form filled in, lease sent, reply after one month, lower rent after two.

Read the article 28 October 2026

Rent control in Berlin: Helena's rent fell from €13.70 to €10.80 per m², over 20% less. How long it took and why so few tenants use their right.

Read the article 28 October 2026

Rent control experiences from Berlin: Richard had doubts, called CONNY for advice and cut his overpriced rent by €80 a month. His story.

Read the article 28 October 2026

Rent control in Kreuzberg: Katharina cut her rent by around €230 a month with CONNY. Read her story and check your rent for free.

Read the article 28 October 2026

Rent control story: a tenant challenged an excessive rent with CONNY, had nothing to do and now pays 390 euros less a month – no cost risk.

Read the article 28 October 2026

A Berlin tenant's rent control experience: he uploaded his lease, CONNY enforced the Mietpreisbremse against a big landlord, and now pays €120 less a month.

Read the article 19 October 2026

Free tenancy law consultation: a 10-minute phone call with CONNY's experts to check if your rent is too high under the Mietpreisbremse. No obligation.

Read the article 17 October 2026

Rent control (Mietpreisbremse) is extended to 31 Dec 2029. What changed, new 2026 state ordinances, exceptions and how to reclaim overpaid rent.

Read the article 16 October 2026

How Tamás from Berlin-Moabit used CONNY to cut his rent by €190 a month within a week under Germany's rent brake – and how to check your rent for free.

Read the article 16 October 2026

Excessive rent in Berlin-Neukölln: Kamilla's flat share paid €1,070 net for 82 m². With CONNY and the rent brake, the rent fell to €514. Here's how.

Read the article 16 October 2026

Pretextual Eigenbedarf? If your landlord faked a personal-use eviction, you can claim damages: moving costs, broker fees and higher rent. CONNY explains how.

Read the article 15 October 2026

Where does rent control apply in Germany? See the 13 federal states and ~730 cities covered, and check for free whether your rent is too high.

Read the article 14 October 2026

Does rent control apply to furnished flats? Yes. Here's how to check your furnishing surcharge after the 2026 reform – free of charge and with no risk.

Read the article 14 October 2026