Increase in utility value

Increase in utility value refers to modernization measures carried out on a rental property that permanently raise the standard of living and objectively improve the utility value for tenants-in contrast to maintenance measures, which merely preserve the existing condition. Increasing utility value is significant under tenancy law because landlords are permitted to allocate the costs of such modernizations proportionally to the net base rent (Section 559 of the German Civil Code (BGB)).

Distinction: Modernization vs. Maintenance

This distinction is crucial in tenancy law:

Modernization (Increase in Utility Value):

• Installation of an elevator in a building without an elevator
• Installation of modern heating (e.g., radiant floor heating, heat pump)
• Initial thermal insulation of exterior walls
• Installation of a built-in kitchen or modern bathroom fixtures
• Barrier-free renovation (floor-level shower, widened doorways)

Maintenance (no increase in utility value):

• Repair of a defective heating system
• Replacement of old windows with equivalent new windows
• Repainting the exterior
• Repair of moisture damage

Measures that, upon completion, both increase the utility value and serve a maintenance purpose are split: Only the modernization portion is apportionable.

Rent Increase Following Modernization (Section 559 BGB)

Following modernization, landlords may increase the annual net base rent by up to 8 percent of the modernization costs incurred for the apartment. A cap applies here: The rent may not increase by more than 3 euros per square meter of living space due to modernization rent increases within a six-year period (Section 559b(4) BGB). The tenant must be notified in writing of the planned modernization three months before the work begins.

Calculation example: A modernization project for an 80-square-meter apartment costs 20,000 euros. The apportionable portion (after deducting maintenance costs and any subsidies) amounts to 15,000 euros. In this case, the annual rent may increase by 8 percent × 15,000 euros = 1,200 euros, or 100 euros per month. If a modernization increase of 2 euros/m² has already been applied to the same apartment within the last six years, the new increase is limited to a maximum of 1 euro/m² (equivalent to 80 euros per month)-the 3-euro cap applies.

Notice, Obligation to Tolerate, and Hardship Clause

Tenants are generally obligated to tolerate modernization measures (Section 555d BGB). However, they may raise objections if the measure constitutes an unreasonable hardship for them (Section 555d(2) BGB)-e.g., in the event of serious illness or if the rent increase is financially unfeasible. In such cases, the court weighs the interests of the landlord and the tenant.

The notice of modernization must be in writing and contain the following information:

• Type and scope of the measures
• Start date and expected duration
• Expected rent increase upon completion
• Reference to the right to invoke hardship

An incorrect or incomplete notice may result in tenants not being required to tolerate the measure-or in the subsequent rent increase being invalid.

Energy-Efficiency Modernization: A Special Case in the Context of the GEG

Energy-efficiency modernizations (facade insulation, heating system replacement, window replacement) are a special form of increasing the utility value of the property, as they simultaneously improve living comfort and reduce energy costs. The following should be noted regarding energy-efficiency measures:

• Subsidies (BAFA, KfW) must be deducted from the apportionable costs (Section 559a BGB)
• The tenant’s energy savings may be taken into account in the hardship assessment
• Energy-efficiency upgrades are privileged under Section 555b No. 1 BGB-tenants can only invoke hardship under more stringent conditions

Practical Tip for Landlords in Nuremberg and Franconia

In Nuremberg and the metropolitan region, energy-efficiency upgrades (thermal insulation, heating system replacement) are particularly relevant, as many apartment buildings from the 1950s to the 1970s are in significant need of renovation. We recommend that landlords check before undertaking a modernization whether subsidies (KfW-BEG, BAFA) are available-these reduce the net construction costs and thus the amount that can be passed on to the tenant. At the same time, utilizing subsidies protects against placing an excessive burden on the tenant.

Particularly important: The correct distinction between modernization and maintenance costs in the case of mixed measures. When replacing an old gas heating system with a new heat pump, the portion of the costs corresponding to the mere maintenance of the heating function is not apportionable. Only the additional expense for the energy-related added value (higher efficiency, renewable energy) should be classified as modernization. In such cases, we recommend consulting with a tenancy law attorney or tax advisor in advance to determine the cost allocation.

Frequently Asked Questions

How is the rent increase calculated after a modernization?

Example: Modernization costs for the apartment amount to 20,000 euros. Maximum annual rent that can be passed on: 8% × €20,000 = €1,600 per year, or €133 per month. If subsidies were utilized, these must be deducted from the costs that can be passed on (Section 559a of the German Civil Code).

Can the landlord modernize the apartment without asking the tenant?

Modernization measures must be announced to the tenant at least three months in advance; the tenant’s consent is not required. However, the tenant has the right to terminate the lease early, effective at the end of the second month following the start of modernization, after receiving notice of the rent increase (Section 555e of the German Civil Code (BGB)).

What happens if the landlord declares maintenance measures to be modernization?

This is not permitted. If a rent increase is based on measures that do not result in an increase in the property’s utility value, the tenant may reject the increase or demand a refund of overpaid amounts. In the event of a dispute, the local court decides; expert opinions are frequently consulted.

As a tenant, can I prevent the modernization entirely?

No, there is no general right to prevent it. Anyone who is unreasonably burdened by the modernization or the subsequent rent increase may invoke a hardship clause under Section 555d(2) of the German Civil Code (BGB). The court will then decide whether the measure may still be carried out or whether and to what extent the rent increase must be limited.

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