Commercial and residential tenancy law operate under fundamentally different rules in Germany. Residential tenancy law, governed primarily by Sections 535 to 580a of the German Civil Code (Bürgerliches Gesetzbuch, BGB), provides tenants with extensive statutory protections: rent control mechanisms, strict limits on termination, and comprehensive eviction protection. Commercial tenancy law applies the general BGB provisions but strips away most of those tenant-specific safeguards, leaving the contract itself as the primary legal framework for both parties.

Because commercial tenants enjoy far fewer default protections than their residential counterparts, the content of the lease agreement itself is the primary legal safeguard for both parties. This makes professional legal advice at the drafting stage essential.

Under German law, there is no single prescribed form for a commercial lease (Gewerbemietvertrag). However, for any lease with a term longer than one year, the agreement must satisfy the written form requirement under Section 550 BGB, a requirement with significant legal consequences that are frequently underestimated in practice. Beyond that threshold, the parties should ensure the following key elements are clearly addressed in the written agreement:

• The identity and precise scope of the leased premises, including any storage areas, parking spaces, and shared facilities
• The contractually agreed and permitted use of the premises
• The rent amount, including operating costs (Betriebskosten) and the basis on which they are calculated and settled
• The mechanism for rent increases: index-linked (Indexmiete), graduated (Staffelmiete), or turnover-based (Umsatzmiete)
• The commencement date, fixed term, and any options to extend or renew
• Deposits and other forms of rental security (Mietsicherheiten)
• The allocation of maintenance and repair obligations between landlord and tenant
• Non-compete and competition protection clauses (Konkurrenzschutzklauseln)
• Provisions governing structural alterations and reinstatement obligations at the end of the lease
• Liability limitations

Our lawyers draft commercial lease agreements from the tenant’s or landlord’s perspective, ensuring that the agreed terms are legally sound and aligned with each client’s commercial priorities. We also review existing leases before signature to identify unfavorable clauses, protective gaps, or provisions that may be unenforceable under German law.

One of the most consequential rules in German commercial tenancy law is the written form requirement under Section 550 BGB, read together with Sections 126 and 578 BGB. Any commercial lease with a fixed term longer than one year must be executed as a single signed document containing all material terms. Verbal agreements, emails, and addenda not physically attached to or expressly incorporated into the original contract may fail to satisfy this requirement.

The legal consequence of a written form defect is severe: a lease that was intended to be fixed-term is treated as concluded for an indefinite period and becomes terminable by either party with the ordinary statutory notice period under Section 580a(2) BGB – notice given by the third working day of a calendar quarter, to expire at the end of the following calendar quarter. A tenant who believed they had a five-year secured lease could find themselves without premises on roughly three months’ notice if the agreement was not properly executed.

Any subsequent amendments to a commercial lease must also satisfy the written form requirement. Side agreements, oral modifications, or email exchanges that alter material lease terms can trigger a written form defect in the original agreement, rendering it terminable on short notice. Many commercial leases include written form healing clauses (Schriftformheilungsklauseln), under which the parties undertake to cure any defect retrospectively, though German courts have not consistently confirmed how far such clauses are effective in practice. Our lawyers advise on correctly documenting amendments and on the current status of these clauses before they are relied upon.

Where a lease runs for several years, the mechanism governing how the rent changes over time is commercially critical. German commercial tenancy law recognises three principal approaches.

• Index-linked rent (Indexmiete): The rent is tied to a published price index, typically the Consumer Price Index (Verbraucherpreisindex) published by the Federal Statistical Office (Destatis). Adjustments are triggered automatically when the index moves by a specified threshold. This approach provides predictability but requires careful drafting to comply with the Price Clause Act (Preisklauselgesetz).
• Graduated rent (Staffelmiete): The rent increases by fixed, pre-agreed amounts at specified intervals. This gives both parties complete certainty about future rent levels without the need for renegotiation or index tracking.
• Turnover-based rent (Umsatzmiete): The rent is calculated as a percentage of the tenant’s turnover, most commonly used in retail and hospitality settings. This model aligns landlord and tenant incentives but requires robust turnover-reporting mechanisms and carefully drafted audit rights.

Where no rent adjustment clause is included, ordinary rent increases can only be achieved by giving notice of termination conditional on a new rent being agreed, an inefficient and potentially relationship-damaging process. Our lawyers ensure that the selected rent adjustment mechanism is clearly documented and consistent with applicable German law.

German commercial tenancy law distinguishes between ordinary (ordentliche) and extraordinary (außerordentliche) termination. For indefinite-term commercial leases, either party may give ordinary notice by the third working day of a calendar quarter, to expire at the end of the following calendar quarter (Section 580a(2) BGB) – an effective notice period of roughly three months. Fixed-term leases cannot ordinarily be terminated before the term expires, subject to the written-form considerations described above. Notably, unlike in residential tenancy law, there is no right for a commercial landlord to recover premises on grounds of personal use (Eigenbedarf): that basis for termination does not apply to commercial leases.

Extraordinary termination for cause is available to both parties under Section 543 BGB, where the other party has materially breached the lease. Common grounds include:

• Non-payment of rent: extraordinary termination is available on either of two alternative bases under Section 543(2) No. 3 BGB – where the tenant is in arrears for two consecutive rent payment dates, or where arrears accumulated over more than two payment periods reach the equivalent of two months’ rent,
• Unauthorized use of the premises, significant endangerment of the property through the tenant’s neglect, or unauthorized subletting to a third party (Section 543(2) No. 2 BGB),
• The landlord’s failure to grant or restore the tenant’s right to use the premises in the agreed condition (Section 543(2) No. 1 BGB).

Two important limitations apply to rent-arrears termination under Section 543(2) No. 3 BGB. First, the right to terminate is excluded if the landlord receives full payment of the outstanding arrears before serving notice. Second, a notice already served becomes ineffective if the tenant could have discharged the debt by way of set-off (Aufrechnung) and declares that set-off immediately after receiving the notice.

Before exercising extraordinary termination on other grounds, the terminating party must generally serve a formal written warning (Abmahnung) giving the other side a reasonable opportunity to remedy the breach, unless the breach is so serious that a warning would clearly be futile, immediate termination is justified after weighing both parties’ interests, or the tenant is in rent arrears as described above (Section 543(3) BGB).

Receiving a termination notice is alarming, particularly when business operations depend on the premises. The correct response matters from the outset. Our lawyers advise commercial tenants to take the following steps immediately:

1. Secure all documentation. Obtain full copies of the lease, all addenda, prior correspondence, and any notices received. Do not discard any communications from the landlord.
2. Continue paying rent. Do not stop paying rent without legal advice. Arrears arising after a termination notice can give the landlord an independent ground for extraordinary termination and will weaken any challenge to the original notice.
3. Seek legal advice before responding. Do not admit liability, agree to vacate, or sign any documents without first obtaining a legal assessment of whether the notice is valid.
4. Have the grounds assessed. Our lawyers will review whether the stated grounds for termination are legally sufficient, whether the correct procedures were followed, and whether the notice is defective on formal grounds.
5. Consider whether remediation is possible. In some cases, a breach can be remedied after notice has been given. Our team will advise whether remedying the breach would affect the validity of the notice under Section 569(3) BGB.
6. Act promptly. Failure to respond within the applicable timeframe can foreclose available remedies. The earlier legal advice is obtained, the more options remain available.

Where a tenant refuses to vacate after a valid termination, the landlord must bring eviction proceedings before the competent court. German civil procedure does not permit self-help eviction: the landlord must obtain a court judgment and, where necessary, enforce it through the court’s enforcement officers (Gerichtsvollzieher). Higher-value commercial eviction disputes are typically heard by the Landgericht (Regional Court).

A notarized eviction clause (vollstreckbare Unterwerfungserklärung) included in the lease agreement allows the landlord to proceed to enforcement directly without first obtaining a separate court judgment, significantly accelerating the process. Our lawyers regularly include this provision in commercial leases for landlord clients and advise tenant clients on its implications before they sign.

For landlords, our team assesses whether the grounds for eviction are legally secure, prepares the necessary documentation, and represents the client throughout proceedings. For tenants, we challenge defective eviction claims and advise on available defenses, including counterclaims for the landlord’s own breach of the lease.

Even carefully drafted leases give rise to disputes. The most common matters our lawyers handle in German commercial tenancy law include:

• Rent disputes: contested rent increases, disagreements over operating cost settlements (Betriebskostenabrechnungen), and claims for rent reduction on grounds of rental defects (Mietmängel)
• Maintenance and repair disputes: disagreements over which party bears the cost of repairs, and whether the landlord has fulfilled its obligation to maintain the premises in the agreed condition
• Unauthorised alterations: claims arising from structural changes made without the landlord’s consent, and disputes over reinstatement costs at the end of the lease
• Competition protection disputes: claims that the landlord has breached a contractual non-compete obligation by leasing adjacent or nearby space to a directly competing business
• Early termination disputes: challenges to extraordinary termination notices and claims for damages arising from premature vacation or wrongful lockout
• Rental defect claims: tenants are entitled under German law to a rent reduction where the leased premises are affected by defects that impair their agreed use. The scope of qualifying defects and the appropriate reduction are frequently disputed

Our approach in all commercial tenancy disputes is to seek an out-of-court resolution in the first instance. Litigation is time-consuming and expensive, and German courts expect parties to have explored settlement before bringing proceedings. Where litigation is unavoidable, our litigation lawyers represent clients before the Landgericht and, on appeal, before the Oberlandesgericht.

Schlun & Elseven Rechtsanwälte is a full-service law firm with offices in Cologne, Aachen, and Düsseldorf. With over ten years of experience advising international businesses and private clients on German law, our lawyers bring specialist expertise in commercial tenancy alongside broader corporate, contract, and litigation knowledge that matters to business clients dealing with complex lease or dispute situations.

We advise in English and German, making our services fully accessible to international clients operating in the German market. Whether you are a foreign investor acquiring commercial property in Germany, an international company establishing operations, or a domestic landlord managing a commercial portfolio, our team provides practical, commercially minded legal advice at every stage.