Tenants: Facade & Roof Insulation in Germany

Modernization & Cost Allocation 3 min read · published September 07, 2025

As a tenant in Germany, you face many questions with modernizations such as facade or roof insulation: who bears the costs, when can the landlord terminate, and what rights do families have? This text explains in plain language which rules the German Civil Code (BGB) contains on modernization and cost allocation, how modernization measures must be announced, and which deadlines apply. You will receive practical negotiation tips, advice on documenting defects, and concrete steps, for example when an objection or rent reduction makes sense. I also explain how to check the jurisdiction of the local court and which official forms can be helpful in proceedings.

What does modernization mean?

Modernization includes measures that improve living quality or energy efficiency, such as facade or roof insulation. The landlord may carry out modernizations but must announce them in text form and explain which measures are planned and how long they will last. For cost allocation, rules from BGB §559[1] apply, which determine how much of the modernization costs may be passed on to the rent.

Modernization can increase the local comparative rent if certain conditions are met.

Costs, deadlines and rights

Not all costs can be allocated: planning, subsidies or disproportionate expenses can limit allocation. The landlord must inform you before starting and observe deadlines; as a tenant you have the right to a clear breakdown of costs and to inspect invoices. If the works significantly impair your use, you can claim a reduction or demand remedial measures.

  • Check the modernization letter carefully and note dates and scope.
  • Request cost estimates in advance and ask about possible subsidies.
  • Document damage, noise and restrictions with date and photos.
  • Negotiate execution times, especially if children or home office are affected.
Keep a photo and defect log before and after the works.

How to negotiate in a family-friendly way

Rely on factual communication: propose fixed times for noisy work, request dust protection and access restrictions, and ask about alternative housing or rent reductions if the impairment lasts long. If talks fail, check legal options: in first instance, rental disputes are often decided by the local court[2], and civil procedure law regulates claims and deadlines.

Respond to letters within deadlines, otherwise you may lose legal rights.

Practical steps for problems

  • Record date and time of each disturbance and collect evidence.
  • Send a formal written request to the landlord with a deadline.
  • Consider rent reduction or damages with legal advice if necessary.
  • Inform yourself about billing of heating and operating costs after modernization (e.g. Heating Cost Ordinance).
Early, documented communication reduces conflicts and increases chances of compromise.

FAQ

Can the landlord raise the rent because of insulation?
Yes, under conditions §559 BGB allows partial passing on of modernization costs to rent if legal requirements are met.[1]
Do I have to move out during the works?
Only in rare cases is a temporary move necessary; usually protection measures and time limits are possible.
Which court do I contact in case of dispute?
Usually the competent local court decides rental disputes; on appeal, the regional court and the Federal Court of Justice may be involved.

How-To

  1. Read the modernization letter carefully and mark deadlines.
  2. Collect evidence: photos, messages, witnesses, invoices.
  3. Send a formal request to the landlord with a concrete deadline.
  4. Use legal advice or your state conciliation body if needed.
  5. If necessary, file a lawsuit at the competent local court.[2]

Help and Support


  1. [1] BGB §559 — Modernization measures and cost allocation
  2. [2] ZPO — Rules of civil procedure
  3. [3] Heating Cost Ordinance — billing after modernization
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.