Rent increase in Düsseldorf: local comparative rent and cap

01Local reference rent: what it means

The local comparative rent is the rent that is usual for comparable apartments in Düsseldorf. Comparable means: similar type, size, equipment, condition and location, including energetic equipment.

Only rents that have been newly agreed or changed in the last six years are included (§ 558 para. 2 BGB). Old existing rents that have never been increased do not count. Comparative rent, current asking rents and an average of all existing rents are based on different bases and must not be equated.

The comparison rent always refers to the net rent, i.e. without operating and heating costs. If you have agreed an inclusive or partially inclusive rent, the operating cost portion must be deducted for the comparison. The same standard applies to tenants and landlords: If the rent is already at or above the comparative rent, an increase according to § 558 BGB is excluded.

02The Düsseldorf rent index

AI-generated

The Düsseldorf rent index, edition 08/2026, is published by Haus und Grund Düsseldorf und Umgebung e. V. and Mieterverein Düsseldorf e. V. Use the current publication on miete-duesseldorf.de. Qualified status is not asserted here.

A qualified rent index is created according to recognized scientific principles. It must be adapted to market developments after two years and recreated after four years (§ 558d para. 2 BGB). If the legal requirements are met, the presumption according to Section 558d Para. 3 BGB applies. This does not result in any statement about the status of the Düsseldorf rent index.

The specific location category matters. Use the criteria in the relevant edition of the rent index. Classification may change from street to street within a district: Bilk, Flingern and Gerresheim all have quiet residential streets near busy routes. Always check the exact address, not just the district.

03Step by step: Calculate the comparative rent for your apartment

You need four details: residential location, living area, year of construction and current rent excluding operating and heating costs. Then proceed as follows:

1. 1Look up residential areaCheck the specific location based on the rent index criteria. If you are unsure, clarify the classification; “Medium” is not an automatically correct substitute.
2. 2Assign construction year class and areaSelect the appropriate table field from the rent index. It gives a mean and a range.
3. 3Check surcharges and discountsModernized bathrooms, new windows or modern heating can push the rent up within the range, while missing amenities can push it down.
4. 4Compare with your rentThe city’s information page links to the rent index. It is not a DDORF calculator and does not establish the comparative rent for an individual apartment.

For an apartment in a neighboring city, check the relevant publication and responsible authority there. A Düsseldorf rent index is not a replacement for local rules.

04Capping limit: maximum 15 or 20% in three years

Even when the local comparative rent is higher, increases remain limited over a three-year period. The statutory limit is 20%. In areas with a tight housing market, the state may reduce it to 15% by ordinance (§ 558(3) BGB).

North Rhine-Westphalia regulates this in the Tenant Protection Ordinance. Düsseldorf is listed there (as of 10/2026), so 15% applies. The current version and its duration can be found at recht.nrw.de.

The lower value always applies: comparative rent or capping limit. The relevant rent is the rent that was in effect three years before the new increase took effect. All increases according to § 558 BGB during this period will be added together.

05Deadlines: blocking period, approval period, effectiveness

A rent increase according to § 558 BGB follows a fixed schedule:

1. 1Blocking periodThe request for an increase may not come until one year after the last increase at the earliest. The new rent can only take effect once the old one has been unchanged for 15 months.
2. 2Reflection periodYou have until the end of the second calendar month after receipt. Example: receipt on 10 October, deadline 31 December.
3. 3EffectivenessIf you agree, you owe the new rent from the beginning of the third calendar month after receipt - in the example from 1 January.
4. 4Deadline for raising a complaint with the landlordIf you do not agree, the landlord may sue for consent within a further three months. If no claim is filed within that period, the request lapses.

Instead of agreeing, you may terminate the tenancy. After receiving a request to increase rent to the local comparative rent, tenants have a special right to give notice until the end of the second calendar month after receipt, with termination taking effect at the end of the month after next (§ 561 BGB). If you exercise this right, the increase does not apply.

06Formal errors that render the rent increase ineffective

Many rent-increase requests fail to meet the formal requirements. Check these points:

If the justification is missing or clearly incorrect, the request is invalid. The landlord may correct it and serve a new request; the deadlines then begin again.

Common mistakes in practice: The landlord assigns the apartment to the wrong location or year of construction, calculates that the living space is too large or adds surcharges for equipment that the tenant installed himself. Such features are left out of the comparison. Also check whether the living space in the increase request corresponds to the actual area - the actual size is decisive.

If there are three comparable apartments, they must be described so precisely that you can find them: address, floor, size and rent per square meter. An expert opinion must come from a publicly appointed and sworn expert and be comprehensibly justified.

07Rent increase after modernization (§ 559 BGB)

After modernization, the landlord is allowed to pass on 8% of the costs incurred for this to the annual rent. Costs for pure maintenance do not count. This is a separate approach in addition to the comparative rent.

The increase is capped at 3 € per square metre of living area over six years. If the previous rent was below 7 € per square metre, the increase is capped at 2 €. Modernisation must be announced in advance; you may object on grounds of unreasonable hardship.

The announcement must be made in text form no later than three months before the start of the work and must state the type, scope, duration and the expected rent increase (§ 555c BGB). The landlord will explain the actual increase with a cost breakdown after the work has been completed. Have this list checked: parts for maintenance, such as replacing windows that are already worn out, must be deducted.

08Stepped and index-linked rents: § 558 BGB does not apply here

If you have agreed on a graduated rent, the rent only increases according to the steps in the contract (§ 557a BGB). With an index rent, it follows the consumer price index (§ 557b BGB). An additional increase on the comparative rent is excluded in both cases.

In the case of index rent, the landlord must explain the adjustment in text form and state the index change. The capping limit does not apply here; however, the rent brake takes effect at the start of the contract.

09Average rent in Düsseldorf: existing vs. offer

There is no such thing as “the average rent”. Depending on the source, the figure means something different – and only one of them counts for a rent increase.

Asking rents, rents under existing contracts and local comparative rent are different measures. A current listing does not prove that an increase is lawful. Check the justification and property features using the information about the rent index, and seek professional advice if anything is unclear.

10Advice: Mieterverein, Haus & Grund

Tenants receive advice from the Düsseldorf tenants' association or other tenants' associations, and landlords from the Haus & Grund owners' association. Both require membership. In the event of a dispute in court, specialist lawyers in tenancy law can help.

Bring your tenancy agreement, details of previous increases, the increase request and your calculation based on the relevant edition to the consultation. The information about the rent index from the city offers further guidance. For a new tenancy, also consult the Tenancy law basics and comparative rent.