Lease Increase Letter Template for Germany

A Lease Increase Letter (Mieterhöhungsverlangen) is a formal legal document that allows landlords in Germany to request rent increases within the limits established by German tenancy law. Under the German Civil Code (BGB), this document must meet specific legal requirements to be valid and enforceable.

When do you need this document?

You need a Lease Increase Letter when you want to raise rent up to the local comparative rent level (ortsübliche Vergleichsmiete) as permitted under BGB § 558. This typically occurs when market rents have increased since the lease began, when you've made significant property improvements, or when your current rent falls below comparable properties in the area. The letter is also required when transitioning from subsidized housing to market-rate rent, or when local rent indexes show your property is underpriced. In Germany's regulated rental market, you cannot simply increase rent without following the proper legal procedures outlined in the Civil Code.

Key legal considerations

Your rent increase letter must include specific justifications based on local rent indexes (Mietspiegel), expert opinions, or comparable properties in your area. The increase cannot exceed 20% over three years, and you must respect any applicable rent control laws (Mietpreisbremse) in your municipality. The letter must be formally delivered and give your tenant at least two months to consider the increase before it takes effect. Include detailed property information, current rent amounts, proposed new rent, and clear justification for the increase. Remember that tenants have the right to request additional documentation supporting your comparative rent calculations, and they can refuse the increase if it doesn't meet legal requirements.

Legal requirements in Germany

German law under BGB § 558a requires your rent increase notice to be in written form and include specific mandatory elements. You must reference the local rent index or provide detailed comparisons with at least three similar properties rented within the last four years. The notice must specify the exact rental unit, current rent amount, proposed new rent, and effective date of the increase. Under BGB § 558b, your tenant has until the end of the second month following receipt to agree to the increase. If they don't respond or refuse, you can only enforce the increase through court proceedings. Additionally, you must comply with local rent control regulations where they apply, which may limit increases in certain urban areas to prevent excessive rent growth.