Modernization: Tenant Rights in Germany

Modernization & Cost Allocation 3 min read · published September 07, 2025
When landlords announce modernizations, tenants in Germany often face many questions: Which works are permitted, how are costs allocated among tenants, and what deadlines apply? This practical guide explains step by step how to review modernization notices, spot formal errors and, if necessary, file an objection. I explain the most important sections of the BGB in plain language, name responsible courts such as the local court (Amtsgericht) and explain when cost allocation is permissible. This includes practical templates for letters to the landlord, tips for documenting defects and advice on meeting deadlines and appointments to protect your rights as a tenant in Germany. I also show which official forms are provided by authorities.

Which modernizations are permitted?

Landlords may generally carry out modernizations if they follow the rules of tenancy law and the announcement is formally correct. Relevant legal rules can be found in the BGB regarding obligations and modernization measures.[1] Check whether the notice specifies the type, the timeframe and the expected cost allocation.

In most regions, landlords must announce modernizations in a timely manner.
  • Check deadlines: Verify the start, duration and deadlines of the announced works.
  • Check cost allocation: Clarify which costs are to be passed on to you and how the calculation is made.
  • Document defects: Photograph and record condition, damage and disruptions during the works.
  • File an objection: Check whether formal errors or unclear cost statements justify an objection.
Pay attention to legal deadlines, otherwise you may lose rights.

How does cost allocation arise?

Cost allocation is only permissible if the landlord meets the legal requirements and the measure qualifies as a modernization under tenancy law. Allocation can affect pro rata depreciation or operating costs; exact rules are set out in the BGB and related regulations.[1] In disputes over the amount or permissibility, the local court (Amtsgericht) is responsible.[2] Many situations are covered by official templates and guidance, for example from the Federal Ministry of Justice.

FAQ

Do I have to tolerate modernization?
No, not every announcement is automatically binding. Permitted modernizations are those that serve to maintain or improve the dwelling and meet the legal requirements.[1]
When can my rent increase because of modernization?
The rent can increase if the landlord correctly allocates the costs and the measure qualifies as modernization; the permissible amount is determined by statutory provisions and regulations.[1]
Where do I go in case of a dispute with the landlord?
For legal disputes about modernization, rent increases or eviction suits, the local court (Amtsgericht) is the first point of contact. Higher appeals may go to the regional court or the Federal Court of Justice.[2]

How-To

  1. Check deadlines: Read the announcement carefully and note start and end dates of the works.
  2. Prepare a form or letter: Use a clear, written statement or an objection.
  3. Collect evidence: Photograph damages and gather invoices or witness statements.
  4. Submit in writing: Send your objection or inquiries by registered mail or other verifiable delivery.
  5. Consider legal action: If no agreement is reached, consider filing a claim or defense at the local court (Amtsgericht).[2]

Help and Support / Resources


  1. [1] Gesetze im Internet — BGB §§ 535–536
  2. [2] Justizportal — Information on courts
  3. [3] Federal Ministry of Justice — Forms and guidance
Bob Jones
Bob Jones

Editor & Researcher, Tenant Rights Germany

Bob writes and reviews tenant law content for various regions. They’re passionate about housing justice and simplifying legal protections for tenants everywhere.