Checking Modernization Notices for Tenants in Germany

Modernization & Cost Allocation 2 min read · published September 07, 2025

What is a modernization notice?

A modernization notice informs tenants about planned construction measures intended to permanently improve the use of the apartment. In Germany, the BGB regulates tenant and landlord rights; especially relevant are provisions on notification deadlines, notice of rent increases after modernization and cost allocation. [1]

Modernizations can lead to rent increases if legal conditions are met.

Which mandatory details must the notice contain?

The notice must clearly and understandably describe what is planned, when the work is expected to start and what burdens are anticipated. If essential information is missing, the notice may be formally challengeable.

  • Deadline for start and duration (deadline)
  • Type of measures and precise description (notice)
  • Estimated costs and planned cost allocation to tenants (rent)
  • Contact for questions and landlord contact person (contact)
  • Notice of legal consequences and rights to object (document)
Keep the notice and all follow-up correspondence in writing.

Practical example: text blocks and avoiding errors

Sample wording: "The landlord announces the following modernization measures: replacement of the heating system, expected start 01.09.2025, duration approx. 4 weeks, total costs X EUR, expected rent increase pursuant to § 559 BGB." Make sure the start and duration are specified concretely. [1]

The more precise the information, the lower the risk of later disputes.

What to do if information is missing or costs seem excessive?

First, request clarification in writing and set a deadline for specification. Document every communication. If no satisfactory answer is given, you can file an objection and, if necessary, seek judicial clarification; local courts (Amtsgerichte) are usually responsible for tenancy disputes. [2]

Do not wait until deadlines expire to respond, otherwise you may lose rights.

How-To

  1. Check the announced deadline immediately and note the date (deadline).
  2. Request missing information in writing and ask for specification (document).
  3. Prepare a template letter for objection or inquiry (notice).
  4. Seek legal advice or tenant protection if costs or procedures are unclear (contact).
  5. If necessary, file a suit at the competent local court and observe ZPO deadlines (court).
Use photos and witnesses to document expected disruptions.

FAQ

How far in advance must modernization be announced?
There is no blanket statutory period; however the notice must be given sufficiently in advance so tenants can prepare, respond and possibly object. Check specific timings and case law.
Can the landlord raise the rent because of modernization?
Yes, under certain conditions the BGB allows a rent increase after modernization; the allocation and calculation are legally regulated. [1]
Which courts are competent in disputes?
In first instance local courts (Amtsgerichte) are usually competent; appellate decisions can reach the Federal Court of Justice (BGH). [3]

Help and Support / Resources


  1. [1] Gesetze im Internet: BGB
  2. [2] Gesetze im Internet: ZPO
  3. [3] Federal Court of Justice (BGH)
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.