Neighbourhood Nuisance: When Corrosion from Fumes Renders the Owner Liable

Imagine: you have just had the roof of your house in Salon-de-Provence redone, a beautiful zinc roof that cost a small fortune. A few months later, corrosion stains appear. The culprit? The fumes from your neighbour's central heating system, which seep in and attack the metal. What to do? Who can you claim compensation from? This question was put to the French Supreme Court in 1977 by a property owner in Marseille, and the answer is still relevant today. Let's take a look at this landmark decision.

The French Supreme Court ruled: the property owner whose heating installation gives off harmful fumes may be ordered to compensate his neighbour for the damage caused. But be careful, it's not that simple. It is necessary to prove a direct causal link between the fumes and the corrosion, and to rule out other causes such as general air pollution. The judgment we are about to analyse perfectly illustrates this difficulty.

Although this decision is nearly 50 years old, it remains an absolute reference in matters of neighbourhood nuisance. It recalls an essential principle: no one may cause an abnormal neighbourhood nuisance to another. And when that nuisance comes from a technical installation such as central heating, the property owner is liable, even if no intentional fault has been committed. So how does this principle apply in everyday life? That's what we'll see.

The facts: a story that happens every day

Mr. X, owner of a building in Marseille, had recently had the zinc roof of his building completely redone. Everything was perfect until traces of corrosion appeared, damaging the aesthetic and waterproofing of the roof. Worried, he called in an expert who pointed the finger at the central heating system of the neighbouring building, owned by Mr. Y. The fumes, laden with acidic particles, settled on the zinc and slowly ate it away.

Mr. X then sued Mr. Y for compensation for his loss. Before the Tribunal de Grande Instance of Marseille, he succeeded: the judge ordered Mr. Y to pay 50,000 francs (approximately 11,000 € today) in damages. But Mr. Y disagreed. He appealed, arguing that the corrosion could have other causes, such as natural air pollution, and that his heating system complied with standards. The Court of Appeal of Aix-en-Provence upheld the decision: the damage found was caused by the fumes from Mr. Y's building's heating system.

Mr. Y then appealed to the French Supreme Court. He argued that the Court of Appeal had not sufficiently established the causal link, and that the neighbourhood nuisance was not covered by his insurance. The French Supreme Court dismissed his appeal in 1977, finding that the lower courts had sovereignly assessed the facts. The owner of the building responsible for the fumes had to compensate his neighbour.

The reasoning of the court — analysed

The reasoning of the French Supreme Court rests on two pillars: first, the concept of abnormal neighbourhood nuisance; second, the obligation to repair damage caused by a thing under one's control, based on Article 1240 of the Civil Code (formerly 1382). Simply put, if your installation causes damage to your neighbour, you must repair it, even if you have committed no intentional fault.

In this case, the Court of Appeal had found that the fumes from Mr. Y's central heating system were the generating cause of the damage. It took into account the ambient atmospheric corrosion but concluded that, without the fumes, the deterioration would not have been as severe. The French Supreme Court validated this reasoning: it suffices that the nuisance attributable to the neighbour is a determining cause of the damage, even if it is not the sole cause.

A crucial point: the Court also dismissed Mr. Y's argument that it was an unforeseeable accident not covered by his insurance. It held that the neighbourhood nuisance was attributable solely to the insured building and was not an external event. This decision confirms a consistent line of case law since the beginning of the 20th century: the property owner is liable for nuisances caused by installations in his building, without the need to prove fault.

This solution is all the more important because it applies to all types of nuisances: fumes, noise, odours, vibrations, etc. It establishes strict liability, based on the principle of equality of citizens before public burdens: whoever creates an abnormal nuisance for his neighbour must bear the consequences.

What this means for you — practically

Whether you are a landlord, tenant, or co-owner, this decision has direct implications. If you suffer damage caused by a neighbouring installation (heating, ventilation, air conditioning), you can claim compensation without having to prove fault. You only need to show that the nuisance is abnormal and originates from the neighbouring building. For example, a property owner in Salon-de-Provence whose facade is blackened by fumes from a neighbouring restaurant can obtain damages.

For owners of potentially polluting installations, vigilance is required. If you operate a central heating system, an industrial chimney, or an extraction system, you must ensure that your emissions do not cause damage to neighbours. In Marseille, a recent case involved a bakery whose chimney emitted greasy particles that damaged the paint of cars parked nearby. The baker had to compensate the owners and modify his extraction system.

Regarding insurance, check whether your policy covers neighbourhood nuisances. Many home insurance policies exclude or limit this cover. If you are ordered to pay, you may have to pay out of your own pocket. Conversely, if you are a victim, your own insurance may cover you and seek recourse against the person responsible. In the 1977 case, the French Supreme Court reminded that the nuisance was not an unforeseeable accident – so it was not covered by Mr. Y's insurance – meaning he had to pay himself.

Four tips to avoid this type of dispute

• Have your heating and ventilation systems checked annually by a professional. Regular maintenance reduces the risk of polluting emissions. Keep the invoices: they prove your diligence in the event of a dispute.
• Install filtration or purification systems if your emissions are likely to contain aggressive particles. For example, a particle filter on a chimney or an acid fume neutralisation system. The cost is often less than that of compensation.
• Before buying a property, have a neighbourhood survey carried out. Find out about neighbours' activities (restaurants, workshops, boiler rooms) and the condition of roofs and facades. An expert can detect traces of corrosion that would betray a source of pollution.
• If you are a victim, act quickly. Have the damage recorded by a bailiff or expert as soon as it appears. Send a recorded delivery letter to your neighbour informing them of the nuisance and asking them to stop the emissions. Keep all evidence (photos, repair invoices).

Further reading: related case law and developments

The 1977 decision is part of a consistent line of French Supreme Court rulings. As early as 1965, a judgment condemned a property owner whose trees too close to the boundary caused damage to the neighbour's roof (Cass. 3e civ., 9 March 1965). More recently, in 2018, the Court reaffirmed that neighbourhood nuisance does not require fault: an abnormal nuisance is sufficient (Cass. 3e civ., 24 May 2018, no. 17-16.110).

The trend is therefore towards increasingly strict liability. Courts do not hesitate to condemn property owners even in the absence of any negligence. This means you cannot hide behind the compliance of your installation with standards: if it causes damage, you are liable. This development is consistent with growing environmental and public health concerns.

In the future, judges are likely to be even more demanding in terms of nuisance prevention. New technologies (pellet heaters, heat pumps) could generate new types of nuisances. It is therefore crucial to follow current case law and consult a specialist lawyer as soon as a problem arises.

Summary and next steps

Here is a checklist of steps to follow if you are a victim of neighbourhood nuisance from fumes or corrosion:

1. 1. Record the damage: Photograph, film, call in an expert or bailiff. Date the deterioration.
2. 2. Identify the source: Investigate the origin of the fumes (neighbour, next building). Consult co-ownership or business registers.
3. 3. Put the perpetrator on notice: Send a recorded delivery letter with acknowledgement of receipt describing the nuisance and requesting its cessation and compensation.
4. 4. Consult a lawyer: Before starting proceedings, a lawyer specialising in property law will assess your chances and assist you in amicable or judicial steps.
5. 5. Take legal action: If no agreement is reached, sue in the judicial court. You can claim damages, restoration under penalty, and sometimes interim measures (suspension of the installation).

If you are the source of the nuisance, the best approach is to act quickly to stop it and negotiate amicable compensation. This will save you legal costs and negative publicity.

Are you in a similar situation? A 30-minute initial consultation with Maître Zakine (€45) can save you months of proceedings – and often much more. Book an appointment →