Hamburg Commercial Maintenance: Shell-and-Core to Triple Net

Under the German Civil Code (Bürgerliches Gesetzbuch), effective 1 January 1900, Hamburg landlords in the residential sector bear a nearly non-delegable duty to keep the property habitable. The commercial sector is the opposite: provided clauses are properly drafted and sufficiently specific, commercial leases in Hamburg can transfer most maintenance and repair obligations to the tenant. This flexibility is one of the main reasons Hamburg's commercial real estate market is attractive to institutional investors.

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

The Default Legal Position

The starting point under § 535 BGB remains: the landlord must deliver the property fit for use and maintain it in that condition.

In the commercial context, this can be comprehensively re-allocated by contract.

"Dach und Fach" — The Hamburg Standard Allocation

The most common maintenance distribution clause in Hamburg commercial leases divides obligations along the following lines:

Landlord retains ("Dach und Fach"):

• Structural elements: load-bearing walls, foundations, roof (waterproofing and structural integrity)
• Exterior envelope: façade, exterior windows (structural glazing), building services shared with other tenants

Tenant takes ("alles andere" / everything else):

• Internal partitions, doors, ceilings, and floor coverings
• Internal HVAC equipment (air conditioning units, fan coil units serving only the demised space)
• Internal plumbing and electrical fittings
• Tenant's own signage and equipment
• Decoration in all forms

Critical drafting issue: Shifting the obligation for 'Dach und Fach' (structural elements, roof, and shell) to the tenant in standard-form contracts (AGB) is void (BGH XII ZR 112/17). Such a transfer is only legally enforceable through an individually negotiated agreement (Individualvereinbarung). Furthermore, tenants cannot be made responsible for repairs of defects that existed prior to the start of the lease (Anfangsmängel) via standard-form clauses (BGH XII ZR 15/15).

AGB Cap on Maintenance Costs: When maintenance cost-shifting clauses appear in standard-form contracts (AGB), § 307 BGB places limits on their enforceability. Courts have restricted these clauses — particularly those shifting small repair costs — to a cap of typically 5–10% of the annual net rent. Maintenance cost-shifting that exceeds this level in standard-form contracts is routinely void; such arrangements are only fully enforceable as individually negotiated agreements (Individualvereinbarungen).

Triple-Net Leases (Dreifach-Netto-Mietvertrag)

Common for single-tenant assets (logistics centers, retail parks, stand-alone retail buildings) in Hamburg's suburban and industrial zones.

The tenant takes on three layers beyond standard rent:

1. Maintenance and repair of the entire property interior and exterior (beyond structural only)
2. Insurance premiums for the building
3. Real estate taxes (Grundsteuer) — passed directly to the tenant

The landlord receives the net rent unchanged, functioning purely as a capital provider. Any tax changes or insurance premium increases flow directly to the tenant's cost base.

German law compatibility: True triple-net structures must be carefully drafted to comply with § 307 BGB (prohibition of unfair standard-form clauses). Key requirements:

• The clause must identify all costs clearly and specifically — a catch-all "all costs" transfer is routinely void
• Must not include costs for the structural renewal of major components (e.g., complete roof replacement) in standard-form contracts — such clauses are typically void; they only work as individually negotiated agreements (Individualvereinbarungen) separately documented
• Annual cost caps for CAM charges in multi-tenant buildings (see below)

Common Area Maintenance (CAM) Charges

In Hamburg multi-tenant buildings (shopping centers, office complexes), costs of maintaining shared areas — lobbies, lifts, car parks, green spaces — are allocated to tenants through CAM charges:

• Allocation basis: Usually based on each tenant's share of the total lettable area relative to the building total.
• Annual reconciliation: CAM is typically invoiced as a monthly advance with an annual actual-cost settlement.
• Cap requirement: Under § 307 BGB, standard-form clauses that shift maintenance and repair (Instandhaltung und Instandsetzung) costs for common areas to the tenant must include an absolute annual cap (typically 5–10% of annual net rent). This cap requirement does not apply to general operating costs (Betriebskosten) as defined in the Betriebskostenverordnung (BetrKV), such as utilities, property taxes, and insurance.
• Audit rights: Tenants are entitled to review and audit CAM cost breakdowns; documented CAM statements are legally required.

Note: Following the Fourth Bureaucracy Relief Act (BEG IV), § 550 BGB was amended to allow the text form (§ 126b BGB)—such as email or PDF—for the entire commercial lease agreement and its amendments, replacing the strict written form requirement. This change became effective January 1, 2025, for all new and amended contracts. For contracts concluded before this date, the written form requirement remains relevant only until January 1, 2026.

Practical Guidance for Hamburg Commercial Landlords

Landager helps Hamburg commercial landlords track CAM reconciliation timelines, building maintenance budgets, and warranty periods on major equipment replacements.

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