Residential Rent Increase Laws in Hesse: A Guide

Raising rent in Hesse requires strict adherence to the local reference rent (ortsübliche Vergleichsmiete). In "tight" markets, you face even stricter caps on how fast and how high you can increase monthly payments.

Rent increases in Hesse are governed by a set of rules that are further tightened by the Hesse Tenant Protection Ordinance in 49 municipalities. Landlords must observe strict limits for both new leases and existing tenancies to implement rent increases lawfully.

Rent Increase Rules at a Glance

1. Rent Brake for New Leases (Mietpreisbremse) In the 49 Hesse municipalities with tight housing markets, the rent for new leases may not exceed the local comparative rent (Mietspiegel) by more than 10%. The ordinance was extended in November 2025 until November 25, 2026.

Exemptions

• Higher previous rent: If the previous tenant's rent was already above the permitted level, the landlord may maintain that rent (BGB § 556e)
• ** modernization:** If major modernization was completed in the last three years (BGB § 556e (2))
• New construction: Apartments first occupied and rented after October 1, 2014 are fully exempt (BGB § 556f)

Disclosure Obligation

The landlord must inform the tenant proactively and before lease signing in writing if claiming an exemption

Failure to disclose forfeits the right to claim the exemption.

Affected Municipalities (Selection) Frankfurt am Main, Wiesbaden, Darmstadt, Offenbach, Marburg, Bad Homburg, Dreieich, Langen, Rüsselsheim, Neu-Isenburg, Dietzenbach, Maintal, Eschborn, Kelkheim, Groß-Gerau, Viernheim, and 34 more.

2. Rent Increase Cap for Existing Tenancies

In the 49 Covered Municipalities Rent may increase by a maximum of 15% within three years up to the local comparative rent.

In Other Hesse Municipalities The standard cap of 20% within three years applies.

Requirements for a Valid Rent Increase

1. The rent must have been unchanged for at least 15 months
2. The increased rent must not exceed the local comparative rent
3. The increase notice must be in writing and justified, e.g., by reference to:

• The qualified rent index (available in Frankfurt, Wiesbaden, Darmstadt)
• Three comparable apartments
• An expert appraisal

4. The tenant has a consideration period until the end of the second month following the notice

3. Modernization Surcharge Landlords may pass on 8% of modernization costs (minus maintenance share) as an annual rent increase (BGB § 559). Since the 2019 reform:

• Cap: Monthly rent may increase by a maximum of €3/m² within 6 years through modernization surcharges (€2/m² if rent is below €7/m²)
• Advance notice: Modernization must be announced at least 3 months before in text form

4. Graduated and Index-Linked Rent

Graduated Rent (Staffelmiete, § 557a BGB)

• Pre-agreed rent increases at fixed intervals (minimum 12 months apart)
• Each increase must be stated as a specific euro amount (percentages are insufficient)
• In the 49 municipalities with the rent brake, the initial rent must comply with the maximum allowed rent

Index-Linked Rent (Indexmiete, § 557b BGB)

• Rent is tied to the Consumer Price Index (CPI) published by the Federal Statistical Office
• Adjustments no sooner than every 12 months, communicated in text form
• Initial rent must also comply with the rent brake where applicable

Best Practices for Landlords

1. Verify whether your property is in one of the 49 covered municipalities
2. Use the qualified rent index to justify rent increase notices
3. Document modernization measures carefully for future surcharges
4. Calculate the 3-year cap before each increase
5. Proactively disclose any rent brake exemptions at new lease signing

Landager helps you calculate permissible rent increases, check deadlines, and generate compliant rent increase notices.

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