Lease Extension Addendum Template for Germany

A lease extension addendum is an essential legal document that allows you to formally extend an existing rental agreement under German law. This document becomes necessary when your current lease is approaching its expiration date and both you and the other party wish to continue the landlord-tenant relationship without negotiating an entirely new contract.

When do you need this document?

You need a lease extension addendum when your current lease term is ending and you want to extend it for a specific additional period. This situation commonly arises in residential rentals where tenants wish to stay longer, or in commercial leases where businesses want to continue operating from the same location. The document is also necessary when you need to modify the lease duration while keeping all other terms intact, or when converting a fixed-term lease into a longer arrangement. In Germany's rental market, this addendum provides legal certainty for both parties and ensures compliance with strict tenancy laws.

Key legal considerations

Several critical legal factors must be addressed when creating a lease extension addendum in Germany. The document must clearly identify both parties exactly as they appear in the original lease agreement to maintain legal continuity. You must specify the exact extension period, including the new end date and when the extension becomes effective. Any changes to rent amounts or payment terms should be explicitly stated and must comply with German rent control regulations. The addendum should confirm that all other terms from the original lease remain unchanged unless specifically modified. Additionally, you must ensure proper witness requirements are met if the total lease term exceeds certain thresholds, and both parties should retain signed copies for their records.

Legal requirements in Germany

German law imposes specific formal requirements on lease extension addendums that you must follow for the document to be legally valid. Under BGB §550, any lease agreement or modification with a term longer than one year must be in written form (Schriftform), meaning electronic signatures may not be sufficient. The document must comply with provisions under BGB §§535-580a regarding lease agreements and tenant rights. If the extension involves rent increases, you must ensure compliance with BGB §557 and local rent control laws (Mietpreisbremse). The addendum should reference the original lease agreement by date and parties to establish clear legal connection. German courts strictly enforce these requirements, so proper documentation is essential to avoid disputes and ensure the extension is legally binding and enforceable.