Renting in Hamburg: the rules that differ from the rest of Germany.

German tenancy law is federal, but the Bürgerliches Gesetzbuch leaves several of its most important dials to the states. Hamburg has turned nearly all of them up. Most English-language advice describes the national default. In Hamburg, the rules that actually decide a rent dispute are stricter.

1. The rent brake covers the whole city

Under the Mietpreisbremse, the rent agreed in a new tenancy may generally not be more than 10% above the local comparative rent. The rule is federal (§ 556d BGB), but it only applies where a state switches it on for a named area. Hamburg has switched it on for the entire city, and its current ordinance runs from 1 January 2026 to 31 December 2029.

There are federal exceptions: a flat let for the first time after 1 October 2014, a first letting after comprehensive modernisation, and cases where the previous tenant already paid more. These are the landlord's to rely on, and in most cases the landlord has to tell you before you sign if they are relying on one.

A rent above the cap is not automatically void. You have to object in writing (a Rüge) before you can reclaim anything, and the timing of that objection affects how much comes back. How this works is covered in our guide to the rent brake.

2. The Mietenspiegel and your street

The "local comparative rent" in Hamburg is read off the Hamburger Mietenspiegel. The current edition is the Mietenspiegel 2025, published in December 2025. It is a qualified rent index, which gives it extra weight in court, and it is normally renewed every two years.

Hamburg does something other cities don't: the location category is set street by street, and sometimes by side of the street, in the Wohnlagenverzeichnis. Whether your address counts as a "normal" or "good" location moves the whole range. The city's calculator, map and street directory are at hamburg.de/mietenspiegel.

The calculator gives a range, not an answer. Where a flat sits inside that range depends on features such as the kitchen, bathroom, floor and condition, and that is exactly where landlords and tenants disagree.

3. 15%, not 20%, for increases

During a tenancy, a landlord can ask you to agree to an increase up to the local comparative rent. Nationally the rent may rise by at most 20% in three years. In Hamburg the Kappungsgrenze is 15% across the whole city, under an ordinance valid until 31 August 2028.

The general rules on consent, the consideration period and what a demand must contain are in our guide to rent increases. Only the ceiling is different in Hamburg.

4. If your flat is sold as a condominium

When a rented building is split into condominiums and your flat is sold, the new owner normally has to wait before giving notice for their own use (Eigenbedarf). The federal minimum wait is three years. In Hamburg it is ten years, citywide, under § 577a BGB and the Hamburg ordinance made in 2023.

Hamburg also limits conversion itself. For existing buildings with more than five flats, splitting them into condominiums needs a permit (§ 250 BauGB, extended to the end of 2030). In the city's social preservation areas, including St. Pauli, Sternschanze, St. Georg and parts of Altona, Eimsbüttel, Nord and Wandsbek, conversion permits are normally refused. Renovations there that go beyond a standard fit-out also need approval.

If you receive an Eigenbedarf notice after a sale, check when the flat was converted and when it was sold before doing anything else. Our Eigenbedarf guide covers the rest.

5. Short lets, subletting and the registration number

Hamburg's Wohnraumschutzgesetz protects housing from being used for other purposes, and it was tightened with effect from 20 May 2026. Older advice you find online is now out of date.

• Letting your own home to holiday guests without a permit is limited to eight weeks per calendar year, however much of the flat you let. The old exemption for letting less than half of your home is being phased out, with transitional rules until 1 January 2027.
• Every short-term listing needs a Wohnraumschutznummer, a registration number, shown in the advert. Advertising without one is already an administrative offence, and the fine can reach €500,000. Platforms now report booking data to the authorities under an EU regulation.
• Leaving a flat empty for more than four months without permission can also count as misuse.

Two separate permissions apply to short lets. The city's rules come on top of your landlord's consent, which you need for subletting in any German city. Subletting is also not meant to make you a profit. The Federal Court of Justice confirmed this in January 2026, so a sublet that charges noticeably more than you pay is a risk to your own tenancy. If you are looking at a short furnished let as a tenant, a landlord who cannot show a registration number is a warning sign.

6. Where to get help in Hamburg

• ÖRA (Öffentliche Rechtsauskunft- und Vergleichsstelle) is Hamburg's public legal advice service. It is for residents on low incomes and advises on tenancy law for a fee of at most €15. It does not provide interpreters, so bring someone if your German is limited.
• Tenant associations such as the Mieterverein zu Hamburg and Mieter helfen Mietern advise members for an annual fee. The Mieterverein charges €90 a year in 2026. Most have waiting periods before they will take on a dispute that already exists.
• A tenancy lawyer is the route when there is a deadline, a court claim or a termination. They can also check a Mietenspiegel classification against your specific flat, which neither a calculator nor an article can do.

7. What to check this week

Local rules checked September 2026. Hamburg's ordinances have fixed end dates and are renewed from time to time, so check that a rule is still in force before relying on it.