Thuringia Commercial Lease Requirements: Written Form and Key Clauses

Commercial leases in Thuringia benefit from broad freedom of contract compared to residential tenancies. The primary governing law, the German Civil Code (Bürgerliches Gesetzbuch – BGB), which has been in effect since 1 January 1900, allows parties to agree on almost any terms they wish — including extensive maintenance transfers, deposit arrangements without a cap, and prolonged exclusion of ordinary termination. However, two critical constraints apply to every commercial lease: the text form requirement and — where standard-form contracts are used — judicial review of general terms and conditions (AGB).

Legal DisclaimerThis guide provides general legal information. Lease laws can change. Always consult a licensed notary or lawyer in this region.

The Text Form Requirement — § 550 BGB

Under § 550 BGB (applied to commercial premises via § 578 BGB), any tenancy agreement for a term exceeding one year must be concluded in text form (Textform) according to § 126b BGB. Following the Fourth Bureaucracy Relief Act (BEG IV), this requirement is modernized:

• The agreement does not require a handwritten signature or a single, physically coherent document.
• Electronic communication (e.g., email, PDF) is sufficient to satisfy the requirement.
• All material terms and subsequent amendments must be documented in this text form to avoid the lease being treated as an indefinite-term contract.

The Danger: Immediate Exposure to Early Termination

If the text form requirement is breached — at any point during the lease term — the lease is deemed converted to an indefinite-term tenancy.

The following rules then apply to termination:

• Notice Period: Under § 580a (2) BGB, ordinary termination is permissible at the latest on the third working day of a calendar quarter for the end of the next calendar quarter (effectively a notice period of approximately six months).
• Timing Restriction: According to § 550 BGB, if a lease is converted to an indefinite term due to a form defect, ordinary termination is only permissible at the earliest one year after the handover of the property to the tenant.

The financial consequences can still be significant: a tenant who has invested heavily in fit-out or a landlord who has forward-funded construction may find their fixed-term security lost due to a failure to document changes in text form.

Healing Clauses

Leases often include a "Schriftformheilungsklausel" — a clause obligating both parties to put any oral agreements into the required form promptly. The German Federal Court (BGH) has significantly limited the effectiveness of such clauses, particularly after a change of ownership (§ 566 BGB "Kauf bricht nicht Miete"). They cannot be relied on as reliable protection — the only safe approach is strict text form discipline throughout the tenancy.

Standard vs. Individually Negotiated Clauses

Standard Terms (AGB) — Subject to Judicial Review

If a commercial landlord uses a pre-printed template contract — regardless of how many parties are involved — it may qualify as General Terms and Conditions (AGB) under § 305 BGB and be subject to the fairness review of § 307 BGB. Even in B2B contexts, unacceptably burdensome clauses will be struck down.

Commonly used but potentially void AGB clauses include:

• Transfer of "Dach und Fach" maintenance: Requiring the tenant to bear all maintenance costs, including the roof and shell (structural systems), is invalid in standard-form contracts. Only maintenance for damage attributable to the tenant's use or within their sphere of risk (e.g., interior maintenance) can be transferred via AGB.
• Mandatory end-of-lease renovation: Requiring repainting and refurbishment regardless of actual condition.
• Disproportionate liquidated damages for early exit.

Individually Negotiated Terms — Much Broader Latitude

Where a clause has been genuinely negotiated — both parties had a real opportunity to influence its terms — the AGB fairness controls do not apply. This means highly commercial arrangements (e.g., true "triple-net" leases, full maintenance transfers including structural elements, fit-out contributions with clawback provisions) are achievable in individually negotiated contracts with sophisticated parties.

Proving that clauses were individually negotiated in subsequent litigation can be difficult — document negotiations carefully.

Checklist: What Every Commercial Lease in Thuringia Should Address

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