Repairs and Maintenance in Germany: What Tenants Are Legally Responsible For

German law puts most repair obligations on the landlord — but tenants do carry responsibility for damage they cause, for reporting defects promptly, and in some cases for minor repairs under a valid contract clause. This guide explains where the line is.

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Key takeaways

  • German law (§535 BGB) places the primary repair burden on the landlord. Tenants are not liable for deterioration caused by normal use (§538 BGB).
  • A Kleinreparaturklausel can shift minor repair costs to tenants, but only if the clause includes both a per-repair cap (typically 75 to 150 EUR) and an annual total cap (6 to 8% of cold rent). A clause missing either limit is void.
  • Cosmetic repair clauses (Schoenheitsreparaturen) have been heavily restricted by BGH rulings since 2015. Rigid time-based repainting schedules are unenforceable. Many lease templates still in circulation contain clauses that are already void.
  • Mould is the landlord's responsibility by default. Tenants can become liable only where poor ventilation or heating habits are shown to have caused it.
  • Smoke detector maintenance varies by Bundesland. Six states assign maintenance to the landlord; ten assign it to the tenant, subject to tenancy law overrides.
  • Always report defects in writing. Delayed notification under §536c BGB can cost you the right to rent reduction and compensation.

Quick answer

German law makes the landlord responsible for almost all repairs. Tenants can only be charged for minor items if the lease contains a valid Kleinreparaturklausel with both a per-repair and annual cost cap, or for cosmetic repainting under a clause meeting strict BGH standards. Without a valid clause in writing, tenants owe nothing.

Legal disclaimer: This article provides general information about German tenancy law and does not constitute legal advice. The law and court rulings in this area evolve regularly. For questions specific to your tenancy or a live dispute, consult a Mieterverein (tenants' association) or a qualified Rechtsanwalt (solicitor). Wunderflats accepts no liability for decisions taken on the basis of this article alone.

Overview: the general principle

German tenancy law starts from a protective premise: the landlord provides a property and is responsible for keeping it in the agreed condition for the entire duration of the rental. This duty is anchored in §535 of the Buergerliches Gesetzbuch (BGB), Germany's Civil Code. It is not a one-time handover obligation. It continues for as long as the tenancy lasts, covering everything that keeps the apartment safe, habitable, and fit for its contracted purpose.

§538 BGB reinforces this by specifying that tenants are not liable for changes or deterioration arising from ordinary, contractual use. Wear on carpets, fading paintwork, a tap washer that slowly fails after years of use: none of these create a repair obligation for the tenant by default. German law treats them as the landlord's operating costs, reflected in the rent charged.

This default allocation is adjustable, but within limits. Two specific categories of cost can be transferred to tenants through express lease clauses: minor repair costs via the Kleinreparaturklausel, and cosmetic repair costs via a Schoenheitsreparaturklausel. Both are common in German rental contracts. Both have been heavily shaped by Bundesgerichtshof (BGH) rulings that draw firm lines around what landlords can impose. The critical question for any tenant is not simply whether such a clause appears in the lease, but whether it meets the precise legal requirements that make it enforceable.

Wunderflats data

Wunderflats operates in Berlin, Hamburg, München, Frankfurt am Main, Köln, Düsseldorf, Stuttgart, and Leipzig, with average furnished rents ranging from 1,168 EUR to 1,828 EUR per month. At these rent levels, the stakes in maintenance and repair disputes are significant. A single misunderstood clause can cost tenants hundreds of euros at move-out.

Source: Wunderflats internal data (BigQuery), Jun 2025–May 2026.

What landlords are responsible for

The scope of the landlord's §535 BGB duty is broad. It covers the entire building fabric, all essential systems, and any appliances the landlord included in the lease. Structural work, heating, plumbing, and electrical systems all fall here without exception or caveat.

Major appliances supplied as part of the rental, such as a built-in oven, refrigerator, or washing machine, are part of what the tenant contracted to rent. If a heating boiler breaks down, a pipe leaks inside a wall, or a window frame rots to the point it no longer seals, that is the landlord's problem to resolve. The same applies to the roof, exterior walls, staircases, and shared infrastructure throughout the building.

Category Examples Legal basis
Structural repairs Roof leaks, cracked exterior walls, subsidence, staircase repair §535 BGB
Heating system Boiler failure, radiator replacement, central heating repair §535 BGB
Plumbing and drainage Burst pipes, blocked drains (not caused by tenant), faulty water mains §535 BGB
Electrical systems Fuse box faults, wiring defects, faulty sockets beyond normal wear §535 BGB
Windows and doors Rotting frames, broken seals, structural door faults, double-glazing failure §535 BGB
Major appliances (if in lease) Built-in oven, refrigerator, washing machine supplied by landlord §535 BGB
Normal wear and tear Faded paintwork, worn floor surfaces, gradual deterioration from ordinary use §538 BGB
External elements Balcony waterproofing, exterior painting, shared garden infrastructure §535 BGB

One point worth knowing if you are in a furnished rental: if a landlord-supplied appliance breaks midway through your tenancy, you are entitled to report it as a defect. The landlord must repair or replace it within a reasonable time. Delaying that repair without cause is not an option they have. You contracted for a functioning apartment, and a broken oven or washing machine represents a partial failure to deliver that.

If the landlord refuses to act, §541 BGB gives you the right to claim damages for any loss arising from their failure to repair. This right becomes particularly relevant when a defect causes further damage to your property, such as a leaking roof that damages your belongings, or a faulty heating system during a German winter. Document everything and report in writing from day one.

What tenants are responsible for

Tenants carry a duty of careful use and an obligation not to damage the property beyond normal wear. Damage caused through negligence, misuse, or accident falls on the tenant regardless of what the lease says. A wall with a large hole, a sink cracked by force, windows broken in an avoidable incident: these are the tenant's cost to repair.

Beyond that, tenant responsibilities are defined by what the lease actually says, within the limits of what the law permits. Two clause types can extend obligations significantly. The table below shows what can and cannot be transferred to tenants.

Responsibility area Tenant liable? Conditions
Damage caused by the tenant Yes Always, regardless of any clause
Minor repairs (Kleinreparaturklausel) Conditional Only with a valid clause containing both a per-repair cap and an annual cap
Cosmetic repairs (painting/wallpaper) Conditional Only with a valid, BGH-compliant Schoenheitsreparaturklausel and apartment handed over renovated
Prompt defect reporting Yes Always required under §536c BGB; failure risks loss of rent-reduction rights
Smoke detector battery (some states) Conditional Where state building law assigns maintenance to tenant and detectors use replaceable batteries
Garden maintenance Conditional Only if expressly stipulated in the lease and reasonable in scope
Structural repairs No Cannot be transferred to tenant under any clause
Heating, plumbing, electrical systems No Cannot be transferred to tenant under any clause
Normal wear and tear No §538 BGB; landlord's cost by default

Access and cooperation also sit with the tenant. When a repair is needed, the tenant must allow the landlord or a qualified contractor reasonable access to the property. Moving furniture to give access to a wall or pipework is part of that obligation. Refusing access without good reason can in some circumstances expose the tenant to liability for additional damage that results from the delayed repair.

The Kleinreparaturklausel explained

The Kleinreparaturklausel transfers the cost of small, specific repairs from the landlord to the tenant. The underlying rationale is practical: a tenant who uses a tap handle dozens of times every day has a closer relationship with that fitting than the landlord does, and it is reasonable to ask the tenant to cover the modest cost of a worn washer or a loose handle. The BGH has accepted this logic, but surrounded it with strict requirements.

For a Kleinreparaturklausel to be valid, it must satisfy three cumulative conditions derived from BGH ruling VIII ZR 129/91 (6 May 1992) and confirmed in subsequent case law. All three must be present. If even one is missing, the clause fails entirely and the tenant owes nothing.

  • Written into the lease: an oral agreement or a verbal instruction from the landlord has no legal effect in this context.
  • Per-repair cost cap: the clause must specify a maximum amount for each individual repair. Current BGH-accepted thresholds are in the range of 75 to 150 EUR. A clause with no per-repair limit is void in its entirety.
  • Annual total cap: the clause must also cap the tenant's cumulative exposure across a year. The accepted range is 6 to 8% of the annual cold rent (Nettokaltmiete). A clause that could expose the tenant to unlimited yearly costs is void.

The scope of qualifying items is equally restricted. The clause may cover only components that are in frequent, direct physical contact with the tenant: tap washers and cartridges, shower fittings, toilet seats, door handles, light switches, and window catches. It cannot extend to the underlying pipework, the central heating system, electrical wiring, or anything structurally embedded in the building. The distinction is between the interface the tenant touches and the infrastructure that sits behind it.

Covered by a valid Kleinreparaturklausel Not covered (landlord's responsibility)
Tap washers and cartridges Water pipes and supply lines
Showerhead (within cap) Shower tray or bath replacement
Door handles and window catches Door frames, structural hinge wear
Light switches and socket covers Electrical wiring or fuse box
Toilet seat replacement Toilet cistern mechanism or pan
Light bulbs (if clause specifies) Light fixtures or wiring faults

Warning: If your lease contains a Kleinreparaturklausel but it lacks either a per-repair cap or an annual total cap, the clause is void under BGH case law. You are not obliged to pay anything under it. Before paying a repair invoice presented under this clause, check the exact wording of your contract. If in doubt, contact your local Mieterverein before paying.

Even with a perfectly valid clause, the repair cost must not exceed the cap. If a plumber charges 200 EUR to replace a tap cartridge and the per-repair cap in your lease is 120 EUR, you owe only 120 EUR. The landlord covers the balance. The cap is a hard ceiling, not a guideline.

Kleinreparaturklausel validity checklist

Use this checklist to assess whether a clause in your lease is enforceable. A valid clause must satisfy all four points.

  • In writing: the clause appears in the signed rental agreement, not as a verbal side arrangement.
  • Per-repair cap stated: a specific maximum amount per repair is written into the clause (typically 75 to 150 EUR).
  • Annual cap stated: a maximum annual total is written into the clause (typically 6 to 8% of annual cold rent).
  • Scope limited to tenant-contact items: the clause applies only to fittings in frequent, direct physical contact with the tenant, not to plumbing, heating, or structural components.
  • No rigid time intervals: the clause does not require repairs on a fixed schedule regardless of actual condition.

Requirements can change as case law develops. If your clause is borderline or unclear, consult a Mieterverein before assuming it binds you.

Schoenheitsreparaturen (cosmetic repairs)

Schoenheitsreparaturen is the German legal term for cosmetic repairs: the redecoration work that keeps an apartment looking maintained. The statutory definition under §28 Abs. 4 of the Zweite Berechnungsverordnung (II. BV) covers wallpapering, painting or whitewashing of walls and ceilings, painting floors, radiators and heating pipes, interior doors, and interior surfaces of windows and exterior doors. That list is exhaustive. Work not on it, including exterior painting of windows or sealing parquet floors, cannot be imposed on tenants.

By default, Schoenheitsreparaturen are the landlord's responsibility under §535 BGB. It has long been standard practice in Germany to transfer this obligation to tenants via lease clauses. The Bundesgerichtshof has spent considerable effort over the years defining exactly when such transfers are valid, and the law in this area changed significantly in 2015.

The BGH 2015 rulings

Two landmark rulings in April 2015 (BGH VIII ZR 185/14 and BGH VIII ZR 242/13) reshaped cosmetic repair law. The BGH held that clauses imposing rigid repainting schedules, such as every three years for kitchens and bathrooms and every five years for other rooms, regardless of actual condition, are void. The reasoning: such clauses unfairly disadvantage tenants who take excellent care of their apartments, forcing them to redecorate even when there is no visible wear. Condition matters; calendars do not.

The same rulings voided the Quotenabgeltungsklausel, the pro-rata cost-sharing clause requiring tenants leaving before a renovation cycle was due to pay a proportionate share of the estimated future cost. The BGH found these clauses too uncertain: tenants could not reasonably predict their financial exposure at the time of signing. Both clause types remain common in older lease templates still circulating in Germany.

"A clause obliging tenants to redecorate on a rigid time schedule, regardless of actual wear, is invalid."

The January 2024 BGH ruling

BGH ruling VIII ZB 43/23, issued in January 2024, added a further development. The court confirmed that tenants bear the burden of proving an apartment was handed over in an unrenovated state if they want to argue that a cosmetic repair clause should not bind them. Previously, tenants sometimes succeeded in escaping obligations by claiming the apartment was already worn when they moved in, without strong documentary proof.

This shifts significant weight toward documenting the apartment's exact condition on move-in. Photographs of every room, signed by both parties, and the formal Uebergabeprotokoll (handover protocol) are no longer optional good practice. They are essential evidence if a dispute about cosmetic repairs arises at the end of the tenancy.

What a valid clause looks like today

A cosmetic repair clause that meets current BGH standards must use flexible, condition-based language. Something like: "The tenant shall carry out cosmetic repairs as needed, taking into account the actual state of wear." Rigid intervals are out. The clause must also only cover the items listed in §28 II. BV. It cannot apply to an apartment handed over unrenovated, unless the tenant received adequate compensation such as a rent reduction or a decoration allowance at the start of the tenancy.

Warning: Many lease templates still in circulation contain rigid time-based cosmetic repair clauses that are void under the 2015 BGH rulings. If your lease specifies fixed intervals for repainting (for example "every 3 years" or "every 5 years"), that clause is very likely unenforceable. Do not simply comply at move-out without checking. A local Mieterverein can review your clause quickly and at low cost.

At the end of the tenancy, if your lease contains a valid cosmetic repair clause and the apartment shows genuine wear from your occupation, you may be required to repaint before returning the keys. The standard is light-coloured, professionally finished walls. Hiring a professional painter is generally not required unless the clause explicitly demands it. Photograph everything thoroughly before and after any repainting, as disputes about the quality of move-out work are common.

Mould and damp: who pays?

Mould is a defect under German tenancy law. The default position is clear: the landlord must remedy it at their own cost. When black mould appears on a wall or ceiling, the tenant's first move is to report it in writing and allow the landlord access to inspect and remedy the situation. This is the starting point, regardless of any suspicion about how the mould developed.

The complexity arises because mould has two different categories of cause. Structural causes, such as insufficient insulation, leaking pipes, thermal bridges in the building fabric, condensation from inadequate building ventilation design, or rising damp from foundations, are unambiguously the landlord's responsibility. These are defects in the property itself, not in how the tenant lives.

Behavioural causes, meaning a tenant who rarely opens windows, heats selectively or not at all, or pushes furniture flush against cold exterior walls without allowing air to circulate, can contribute to mould growth. German courts have found that where a tenant's habits were a material cause of the problem, liability can shift toward the tenant. The threshold is not trivial. Occasional failure to ventilate on a cold morning is not sufficient. Courts look for a pattern of inadequate ventilation and insufficient heating sustained over time.

Proof is shared and sequential. The landlord must first demonstrate there is no structural cause for the mould. Only once that is established does the burden shift to the tenant to show they maintained proper habits. Courts generally expect tenants to ventilate by opening windows fully several times a day for at least five to ten minutes (cross-ventilation, not tilted windows, is most effective), to heat living spaces to at least 18 to 20 degrees Celsius, and to keep furniture at a minimum of 5 to 10 centimetres from exterior walls. Even when a tenant's habits contributed, German courts frequently apportion liability rather than placing it entirely on one side.

Tip: Keep a simple ventilation log in your first winter in any new apartment. Note the times you ventilate and the approximate outside temperature. This takes under a minute per day and can be decisive evidence if a mould dispute arises later. Photograph any condensation on windows or walls as soon as you notice it, and report early signs of mould to your landlord before they develop further.

Reporting defects (Maengelanzeige)

The Maengelanzeige, the formal defect notice, is not optional: it is a legal requirement under §536c BGB. As soon as a tenant discovers a defect in the rental property, they must notify the landlord without undue delay. The notification must be specific enough for the landlord to understand what is wrong, where it is, and what is needed.

The consequences of delayed reporting are significant and go beyond the defect itself. A tenant who discovers a problem and sits on it loses the right to reduce rent for the period before notification. They also lose the right to claim compensation for any consequential damage that developed because the landlord was not told. If the defect worsens after the tenant's failure to report, the tenant can become personally liable for the additional harm caused. A small water ingress that becomes severe dampness because the tenant waited three months to mention it is a realistic example of how this plays out.

How to make a valid defect notification

  • Use written form: email is sufficient and creates an automatic timestamp. For serious defects, also send a letter by Einschreiben mit Rueckschein (registered post with return receipt) so delivery is provable.
  • Describe the defect specifically: state where it is, what you observe, when you first noticed it, and how it is affecting your use of the apartment. Vague notices (for example "there is a problem with the bathroom") are less effective in a dispute.
  • Set a reasonable deadline: German courts expect tenants to give the landlord a reasonable opportunity to investigate and remedy. For non-urgent defects, two to four weeks is standard. For urgent problems such as heating failure in winter or an active leak, a much shorter deadline is appropriate.
  • Keep copies of everything: store every communication. You will need it if the dispute escalates to rent reduction, court proceedings, or a Mieterverein review.
  • Photograph the defect immediately: dated photographs taken before and after you report are valuable evidence. Take them from multiple angles and include context showing the location.

Info: Once you have reported a defect and the landlord has failed to remedy it within the deadline you set, you may be entitled to reduce your rent in proportion to the impact of the defect on the apartment's usability. The right to withhold rent (Zurueckbehaltungsrecht) is broader but must be used with care: courts have found that tenants who withheld rent disproportionately or without a valid prior defect notice lost their own legal standing. Always take advice from a Mieterverein before withholding rent.

For expats and internationals unfamiliar with the formalities: the most common mistake is reporting a defect by phone or in person without following up in writing. Verbal reports are almost impossible to prove and will not protect your legal position. A brief, factual email immediately after a verbal conversation is enough to create the written record you need.

Smoke detectors: all 16 Bundeslaender

Smoke detectors are mandatory in all 16 German federal states, a process completed when Sachsen extended the requirement to existing buildings in January 2024. The obligation to install them rests without exception on the landlord or property owner (Eigentuemer) in every state's building code. Bedrooms, children's rooms, and escape-route corridors (hallways) are the minimum requirement across all 16 states. Berlin and Brandenburg additionally require detectors in living and working rooms.

Maintenance responsibility under building codes varies significantly by state. Six states place ongoing maintenance responsibility on the landlord. The remaining ten assign it to the tenant or resident under their building code, with an important qualification: tenancy law overlays building law. The landlord retains an overarching obligation under §535 BGB to ensure devices they have installed remain operational. Even in states where building law assigns maintenance to the tenant, a landlord cannot simply ignore a reported non-functioning smoke detector.

A practical distinction applies to battery replacement. Where state law assigns maintenance to tenants and the detectors in the apartment use replaceable 9V batteries, the tenant is typically responsible for replacing batteries when they run low. Replacing an entire device that has reached the end of its 10-year service life is always the landlord's cost and responsibility, regardless of which state you live in. Sealed-battery (10-year) devices are increasingly common in newer installations.

Federal state (Bundesland) Installation Maintenance (building code) Required rooms (minimum)
Baden-Wuerttemberg Landlord / owner Tenant (unless owner takes over) Bedrooms, children's rooms, escape routes
Bayern Landlord / owner Tenant (unless owner takes over) Bedrooms, children's rooms, escape routes
Berlin Landlord / owner Tenant (unless owner takes over) Bedrooms, living rooms, working rooms, escape routes
Brandenburg Landlord / owner Tenant (unless owner takes over) Bedrooms, living rooms, children's rooms, escape routes
Bremen Landlord / owner Tenant (unless owner takes over) Bedrooms, children's rooms, escape routes
Hamburg Landlord / owner Landlord / owner Bedrooms, children's rooms, escape routes
Hessen Landlord / owner Tenant (unless owner takes over) Bedrooms, children's rooms, escape routes
Mecklenburg-Vorpommern Landlord / owner Landlord / owner Bedrooms, children's rooms, escape routes
Niedersachsen Landlord / owner Tenant (unless owner takes over) Bedrooms, children's rooms, escape routes
Nordrhein-Westfalen Landlord / owner Tenant (unless owner takes over) Bedrooms, children's rooms, escape routes
Rheinland-Pfalz Landlord / owner Landlord / owner Bedrooms, children's rooms, escape routes
Saarland Landlord / owner Tenant (unless owner takes over) Bedrooms, children's rooms, escape routes
Sachsen Landlord / owner Tenant (unless owner takes over) Bedrooms, children's rooms, escape routes
Sachsen-Anhalt Landlord / owner Landlord / owner Bedrooms, children's rooms, escape routes
Schleswig-Holstein Landlord / owner Landlord / owner Bedrooms, children's rooms, escape routes
Thueringen Landlord / owner Landlord / owner Bedrooms, children's rooms, escape routes

Source: Rauchmelder retten Leben / Forum Brandrauchprävention e.V., 2024 guidance. Note: building code provisions on maintenance can be superseded by tenancy law obligations. If a landlord has installed devices and a tenant reports a fault, tenancy law (§535 BGB) places an overarching duty on the landlord to ensure the apartment remains safe. Check your specific lease wording and, when in doubt, consult a Mieterverein.

Info: BGH ruling VIII ZB 43/23 (January 2024) also clarified aspects of smoke detector maintenance liability in tenancy disputes. A tenant is only liable under maintenance clauses where the clause itself is valid and specific. A lease that vaguely assigns "all maintenance" to the tenant without specificity may not validly transfer smoke detector maintenance in states where this is otherwise the landlord's duty.

FAQs about tenant repair obligations in Germany

Who is responsible for repairs in a German rental apartment?

Under §535 BGB, the landlord bears the primary obligation to keep the rental property in a condition fit for its agreed use throughout the entire tenancy. This is not a one-time obligation at handover: it runs for the full duration of the rental. It covers structural repairs, heating and plumbing systems, the roof, windows, and major appliances included in the lease. Tenants are not responsible for changes or deterioration caused by normal contractual use under §538 BGB. Wear and tear from ordinary living, including fading paintwork, floor surface wear, and the gradual deterioration of fittings, is legally the landlord's cost.

However, tenants can be made responsible for two categories of work if valid lease clauses exist: minor repairs under a Kleinreparaturklausel, and cosmetic repairs under a Schoenheitsreparaturklausel that meets current BGH standards. Both clause types are subject to strict case law. If a clause is missing a required limit or was drafted too broadly, it is void and the landlord bears all costs. Reading your lease before assuming any repair is your obligation is always the right first step. A local Mieterverein can review any clause quickly and at low cost.

What is the Kleinreparaturklausel and what does it cover?

The Kleinreparaturklausel is a lease clause that shifts the cost of minor repairs from the landlord to the tenant. For it to be valid under BGH case law (VIII ZR 129/91 of 6 May 1992 and subsequent rulings), it must satisfy three cumulative conditions: it must be written into the lease (oral agreements carry no weight here); it must cap the cost of each individual repair, with BGH-accepted thresholds currently in the range of 75 to 150 EUR per repair; and it must cap the tenant's total annual exposure, typically at 6 to 8 percent of the annual cold rent (Nettokaltmiete).

The clause may only cover items in frequent, direct physical contact with the tenant: tap washers, door handles, light switches, showerheads, and window catches. It cannot extend to the underlying plumbing, the heating system, electrical wiring, or any structural component. The distinction is between the fitting the tenant touches and the infrastructure behind it. If any one of the three conditions is missing from the clause in your lease, the entire clause is void and you owe nothing under it. Always check the exact wording before paying any invoice presented under this basis.

Can my German landlord require me to repaint the apartment when I move out?

Only if the lease contains a valid cosmetic repair clause (Schoenheitsreparaturklausel) that meets current BGH standards. Two landmark rulings in April 2015 (BGH VIII ZR 185/14 and BGH VIII ZR 242/13) voided rigid repainting schedules and pro-rata cost-sharing clauses outright. A clause requiring repainting every three or five years, regardless of actual condition, is unenforceable. This applies to vast numbers of lease templates still in circulation in Germany today.

A further BGH decision from January 2024 (VIII ZB 43/23) confirmed that tenants bear the burden of proving an apartment was handed over in an unrenovated state if they want to argue that a renovation clause should not bind them. Without that proof, tenants cannot simply claim the apartment was already worn at move-in. This makes thorough move-in documentation essential.

Practically: if you moved into a freshly decorated apartment and your lease contains a valid, condition-based renovation clause (not a rigid interval clause), you may be required to repaint at move-out when wear is genuinely visible. If the lease clause uses fixed intervals, it is almost certainly void. Photograph every room on move-in, retain the signed handover protocol (Uebergabeprotokoll), and do not repaint unless you have confirmed the clause is valid. A Mieterverein can check this for you before you spend money on a decorator.

Who is responsible for mould in a German rental?

Mould is a defect under German tenancy law, and the landlord must remedy it at their own cost by default. This applies whenever mould results from structural causes: insufficient insulation, leaking pipes, inadequate building ventilation, thermal bridges in the building fabric, or rising damp from foundations. Report any mould to the landlord in writing as soon as you notice it, even if it is small. Do not wait for the problem to develop.

The position shifts when mould is caused by the tenant's own behaviour. Courts assess whether the tenant ventilated properly, typically several times a day by fully opening windows for five to ten minutes (tilted windows are insufficient), heated consistently to at least 18 to 20 degrees Celsius, and kept furniture away from exterior walls. The burden of proof is shared: the landlord must first show there is no structural cause. Only then does it shift to the tenant. Even when both parties share responsibility, German courts frequently apportion liability rather than placing it entirely on one side.

Keep a simple ventilation log and photograph any condensation on windows or walls early. Early documentation and prompt reporting are the most effective protections. A mould dispute that starts at move-out, without any contemporaneous evidence of how the property was maintained during the tenancy, is extremely difficult to resolve in the tenant's favour.

What happens if I do not report a defect to my landlord?

Failing to report a defect promptly carries serious legal consequences under §536c BGB. You can lose three distinct rights: the right to reduce your rent for the period during which the defect existed before you notified the landlord; the right to claim compensation from the landlord for any consequential damage that developed because they were not told in time; and the right to terminate the lease on the basis of that defect.

There is a further risk. If the unreported defect worsens because you delayed notification, you can become personally liable for the additional damage caused. A small roof leak that you noticed but did not report, which then causes serious water damage to the apartment below, is one example. The standard courts apply is notification as soon as reasonably possible after you discovered the problem.

Always report in writing: email is sufficient and creates a clear timestamp. Describe the defect specifically, state when you first noticed it, and set a reasonable deadline for repair. Keep a copy of every communication. If the defect is urgent, such as a burst pipe or heating failure in winter, call immediately and follow up in writing the same day. Photograph the defect from the moment you discover it. The most common and easily avoidable mistake among tenants in Germany is reporting by phone or in person only, with no written record to show afterward.

Do tenants have to maintain smoke detectors in Germany?

Smoke detectors are mandatory in all 16 German federal states, and installation responsibility always rests with the landlord or property owner. Maintenance responsibility under state building codes varies. In Hamburg, Mecklenburg-Vorpommern, Rheinland-Pfalz, Sachsen-Anhalt, Schleswig-Holstein, and Thueringen, the landlord must also carry out maintenance under building law. In the remaining ten states, the building code assigns maintenance to the tenant or resident.

However, building code rules do not operate in isolation. Tenancy law overlays them. The landlord retains an overarching duty under §535 BGB to ensure devices they have installed remain operational. Even in states where building law assigns maintenance to the tenant, a landlord cannot simply ignore a reported non-functioning smoke detector. BGH ruling VIII ZB 43/23 (January 2024) also confirmed that maintenance liability under a lease clause requires the clause to be valid and specific: a vague general maintenance clause may not validly transfer smoke detector responsibility.

In practical terms: if your detectors use replaceable 9V batteries and your state assigns maintenance to tenants, you are responsible for replacing batteries when they run low. Replacing an entire device that has reached the end of its 10-year service life is always the landlord's cost, regardless of which state you live in. Check your lease for any specific clause on smoke detector maintenance. When in doubt, consult your Mieterverein.

Can a landlord charge a tenant for a broken appliance that came with the furnished apartment?

No, not for normal mechanical failure or end-of-life wear. If an appliance, such as a built-in oven, dishwasher, or refrigerator, was listed in the lease inventory and included as part of the rental, it forms part of what the landlord is obliged to maintain in working order under §535 BGB. When an appliance stops working through ordinary age or wear, the landlord must repair or replace it at their own cost and within a reasonable timeframe.

The position changes if the tenant caused the damage. Misuse, incorrect operation, using unsuitable products that damaged the mechanism, or allowing a known fault to worsen without reporting it would shift liability toward the tenant. The dividing line is always between ordinary use and the tenant's own conduct. Most courts apply a common-sense test: would a careful, typical tenant using this appliance normally have caused this fault? If yes, it is the landlord's cost. If not, the tenant bears it.

Report the fault in writing as soon as the appliance stops working, set a clear repair deadline (two to three weeks for a non-urgent item), and document the appliance's condition with photographs. If the landlord does not repair within a reasonable time, you may be entitled to a proportional rent reduction for the period the appliance is out of service, provided it was a meaningful part of what you contracted to rent. Wunderflats platform data shows that furnished mid-term rentals in Germany's major cities command average rents between 1,335 EUR and 1,828 EUR per month. At those levels, working appliances are a core part of the contract, not an optional extra.

Sources