German Court Rules: Homeowners Can Install Air Conditioning

Introduction

In a ruling that will affect thousands of apartment owners across Germany, the Federal Court of Justice (Bundesgerichtshof, or BGH) has confirmed that homeowners have the right to install air conditioning units — and that a homeowners' association (Wohnungseigentümergemeinschaft, or WEG) cannot simply block them. The decision comes at a time when German summers are becoming increasingly dangerous, with over 5,100 heat-related deaths recorded in the first half of this year alone. For expats who own property in Germany, or who are considering buying, this ruling changes the practical landscape of what you can do to make your home livable during extreme heat.

What the Court Actually Decided

The BGH ruled that an individual apartment owner's right to make reasonable structural changes to their property — including installing an external air conditioning unit — cannot be categorically prohibited by a WEG. In Germany, most apartment buildings are managed collectively by a homeowners' association, which sets rules about shared spaces, building facades, and structural modifications.

Previously, many WEGs used their authority over the building's exterior and shared structure to block residents from mounting AC units on outer walls or balconies, citing aesthetic concerns or potential structural impact. The court's ruling clarifies that such blanket bans go too far. Homeowners have a legally protected interest in being able to cool their homes, and associations must engage with individual requests rather than refuse them outright.

Importantly, this does not mean you can install anything anywhere without approval. The ruling reinforces a right to apply and to receive fair consideration — not an unconditional right to install without any process.

What This Means in Practice

If you own an apartment in Germany and want to install air conditioning, here is what the ruling means for you concretely:

• You have a strengthened legal basis to request permission from your WEG. A flat refusal based purely on aesthetics or blanket policy is now legally more difficult to sustain.
• You still need to go through the WEG process. Submit a formal written request (Antrag) to your WEG, describing the type of unit, installation method, and any measures to protect the building fabric.
• Decisions should be made per case. The WEG must assess your specific request, not apply a one-size-fits-all ban.
• Technical and aesthetic conditions may still apply. The association can set reasonable conditions — for example, requiring a specific type of unit or a particular installation method that minimizes visual impact.
• If refused without valid reason, you can challenge the decision in a German civil court (Amtsgericht or Landgericht depending on the value of the case).

What About Renters?

This ruling applies specifically to Eigentümer — people who own their apartment. If you are renting (Mieter), the situation is different. Renters do not have the same property rights as owners and generally need explicit permission from their landlord (Vermieter) to make any structural changes, including installing AC.

However, the ruling may have an indirect effect on the rental market:

• Some landlords may now be more willing to install air conditioning themselves, knowing they have clearer legal footing to do so in buildings with a WEG.
• Renters who want AC can still request it in writing; landlords are not required to agree, but the broader cultural and legal shift toward cooling rights may make conversations easier.

If you are a renter and want to install a portable (non-fixed) air conditioning unit that does not require wall mounting or external components, you generally do not need permission — but always check your rental contract (Mietvertrag) first.

Germany's Air Conditioning Gap

Germany has one of the lowest rates of residential air conditioning in Europe. Historically, summers were mild enough that cooling was seen as unnecessary, and energy efficiency concerns reinforced this view. But repeated heat waves — including the deadly summers of 2003, 2019, and 2023 — have made clear that this is no longer a luxury question. It is a health and safety issue.

The BGH ruling reflects a broader legal and social reckoning with this reality. Public buildings, schools, and care homes are also under increasing pressure to install cooling infrastructure. For private homeowners, the court has now removed one of the key bureaucratic barriers.

Frequently Asked Questions

Do I need to inform my WEG before installing air conditioning, even after this ruling?

Yes. The ruling does not remove the requirement to seek approval — it strengthens your right to have your request fairly considered. You should always submit a formal written request to your WEG before proceeding with installation. Installing without approval could result in legal disputes and a requirement to remove the unit at your own cost.

Can my WEG set conditions on how the AC unit is installed?

Yes, and this is entirely normal. Your WEG may require a specific type of unit, a particular location (e.g., not visible from the street), or specific installation standards to protect the building's structure and appearance. As long as conditions are reasonable and proportionate, they are legally valid.

What if my WEG still refuses after this ruling?

If your WEG refuses your request without providing a valid, case-specific reason, you have the right to challenge the decision in a German civil court. It is advisable to consult a lawyer specializing in property or tenancy law (Wohnungseigentumsrecht) before taking this step. Many lawyers offer an initial consultation (Erstberatung) at a fixed fee.

Does this ruling apply across all of Germany?

Yes. The Bundesgerichtshof is Germany's highest civil court, and its rulings set binding precedent for all lower courts across all 16 federal states (Bundesländer).

Conclusion and Next Steps

The BGH's ruling is a meaningful win for apartment owners in Germany who want the right to cool their homes. If you own property and have been blocked by your WEG from installing AC, you now have a stronger legal foundation to make your case. Start by submitting a formal written request to your WEG, document everything, and if you face unreasonable refusal, speak to a property lawyer.

If you are renting, this ruling does not directly help you — but it is worth having a written conversation with your landlord, particularly as heat safety becomes a more prominent public issue in Germany.

Source: The Local Germany / Bundesgerichtshof (BGH)