Hesse rent brake in doubt after AG Frankfurt rulings, Jun & Sep 2026

What the two Frankfurt rulings decided

On 10 June 2026, the Local Court (Amtsgericht, AG) Frankfurt held that Hesse’s attempt to prolong its rent‑control ordinance (Mieterschutzverordnung, MiSchuV) by one year in November 2025 was unlawful. The court said the extension did not meet the stricter justification requirements in section 556d(2) of the German Civil Code (BGB), which since 17 July 2025 requires current, municipality‑specific reasons for every area designated as an “overheated market.” The court therefore applied the rent brake only up to the end of the 2020 ordinance’s term and rejected the tenant’s claim for the period after it expired. Case: AG Frankfurt, 33029 C 130/25, 10 June 2026.

The second case on 9 September 2026

On 9 September 2026, the AG Frankfurt again addressed the MiSchuV. It confirmed that Hesse did have a valid ordinance in force up to late November 2025, but treated the 2025 extension as ineffective. The tenant obtained a repayment order and a judicially set starting rent (Ausgangsmiete) for future index‑linked adjustments; the tenor shows €11,332.79 awarded, with a permissible base rent fixed at €842.89. Case: AG Frankfurt, 33029 C 147/25, 9 September 2026.

What the Hesse rules actually say and when they expired

Hesse consolidated three federal rent‑protection tools in one ordinance on 26 November 2020: the rent brake for re‑lettings under section 556d BGB (cap of local comparable rent plus 10%), the reduced rent‑increase cap (Kappungsgrenze) of 15% over 3 years under section 558(3) BGB, and an eight‑year block on termination for own use after condominium conversion under section 577a(2) BGB. This 2020 MiSchuV explicitly covered 49 municipalities including Frankfurt, Wiesbaden, Darmstadt, Kassel suburbs and others. It expired by its own terms on 25 November 2025.

Why the 2025 one‑year extension is under fire

The federal amendment of 17 July 2025 kept the Länder’s power to designate rent‑brake zones until 31 December 2029 and tightened the duty to justify each designated area with up‑to‑date data (section 556d(2) sentences 5–6 BGB). Hesse then issued a short “amending ordinance” on 12 November 2025 that simply replaced the expiry date from 2025 to 2026 and largely reproduced reasoning from 2015/2018 and 2020. The AG Frankfurt held that this did not satisfy the statute’s requirement to show, municipality by municipality, why an overheated market still exists based on current evidence. The Hesse government counters that a new, fully updated ordinance is being prepared and stresses that an Amtsgericht ruling binds only the parties and does not annul a regulation erga omnes. A new MiSchuV is targeted to enter into force in November 2026.

So what can landlords and tenants in Hesse still rely on today?

Dates matter. As of 20 September 2026:

• Leases signed on or before 25 November 2025 in one of the 49 municipalities named in the 2020 MiSchuV: the rent brake (local rent plus 10%), the 15% three‑year cap and the eight‑year post‑conversion block applied while the ordinance was in force. Overcharge claims up to that date can still be pursued; the 10 June 2026 Frankfurt case awarded only up to expiry.

• Leases signed from 26 November 2025 onward: the AG Frankfurt decisions treat the 12 November 2025 extension as ineffective. Practically, tenants cannot count on invoking the rent brake for post‑expiry contracts in Frankfurt, while landlords face litigation risk until higher courts clarify. Whether the reduced 15% cap still applies is similarly disputed; without a valid ordinance, the nationwide default 20% cap in section 558(3) sentence 1 BGB applies.

• Exceptions always remain: the rent brake never applied to first lets of new builds first rented after 1 October 2014 or to the first let after a “comprehensive modernization” (typically at least one‑third of comparable new‑build cost and an upgrade to near‑new‑build condition), both per section 556f BGB.

• The Frankfurt rent index 2026 has been recognized as a qualified rent index since 25 June 2026 and remains the benchmark for the local comparable rent in rent‑brake and rent‑increase disputes alike.

• Other legal tools are unaffected: tenants may still rely on the statutory concept of “Mietpreisüberhöhung” under section 5 of the Wirtschaftsstrafgesetz (WiStG) and, in extreme cases, on general civil‑law controls against usury or unconscionable terms under section 138 BGB. These are fact‑intensive and separate from the rent‑brake regime.

Because Amtsgericht decisions do not bind other courts or nullify a regulation statewide, outcomes can diverge until an appellate court in Hesse speaks or the planned new MiSchuV takes effect. For live cases and contract drafting, ask a Fachanwalt für Miet‑ und Wohnungseigentumsrecht in Hesse.

What to watch between now and November 2026

• New Hesse ordinance: The ministry says a fully updated MiSchuV will be issued by November 2026. Expect a revised map of affected municipalities and fresh reasoning based on newer datasets.

• Appeals or guidance from higher courts in Hesse: if appellate courts endorse or reject the AG Frankfurt’s reasoning, it will reset litigation risk for post‑November‑2025 contracts.

• Use the current rent index: The qualified Frankfurt rent index 2026 (recognized on 25 June 2026) will remain central evidence for both rent‑brake calculations (if applicable) and general rent‑increase disputes under section 558 BGB.