Night noise: a professional convicted even without intent to harm

Imagine: you have just bought a house in Mont-Saint-Aignan, a quiet residential area. You were hoping for peaceful nights, but every evening an engine noise keeps you awake. Your neighbour, a tradesman, uses a motor pump for his professional activity. You ask him to stop, he replies that he has the right to work. Who is right? This question is asked by hundreds of owners and tenants every year. And what if the answer were not so simple?

The decision of the Court of Cassation of 17 January 1990 (No. 89-83.504) provides a clear answer: even in the absence of any intent to harm, even if the noise is related to the exercise of a profession, the offence of night noise (abnormal disturbance caused by noise at night) can be established. The essential point lies elsewhere: the accused (the person prosecuted) must have been aware of the disturbance caused to the neighbourhood and must have taken no measures to remedy it.

This decision, handed down more than thirty years ago, remains extremely relevant today. Whether you are an owner, a tenant, or a professional, it sets out rules that everyone must know to avoid costly neighbourhood disputes and legal proceedings. Let's take a close look at what this case teaches us.

The facts: a story that happens every day

Mr X, owner in Sotteville-lès-Rouen, operates a professional activity requiring the use of motor pumps. During the months of July and August 1988, he used these machines, producing significant noise that disturbed his neighbours. The neighbours, exasperated, warned him of the disturbance. But Mr X took no measures to reduce the noise: no insulation around the engines, no change in usage times. The neighbours eventually filed a complaint.

A bailiff (public officer responsible for recording facts) was instructed. He drew up a report establishing the noise. Statements from neighbours were also collected. The file was brought before the police court, which tries minor offences (the least serious infractions). Mr X was prosecuted for night noise, then provided for by Article R. 34.8° of the Criminal Code (now Article R. 623-2 of the same code).

Before the court, Mr X defended himself: he did not intend to harm, he was simply exercising his profession, and the noise was inherent in his activity. But the court found him guilty. Mr X appealed. The Court of Appeal upheld the conviction. He then appealed in cassation (appeal to the Court of Cassation, the highest judicial court). His argument: there is no night noise without intent to harm. The Court of Cassation dismissed his appeal and confirmed the decision. The reasoning is clear: the offence is constituted as soon as the accused was aware of the disturbance and did nothing to remedy it, regardless of whether he intended to harm.

The reasoning of the court — dissected

The legal basis of the decision is the former Article R. 34.8° of the Criminal Code, which punished insulting or night-time noises or disturbances. Today, it is Article R. 623-2 of the Criminal Code that punishes night noise (noise caused between 10 pm and 7 am) or daytime noise (noise likely to disturb the tranquillity of the place). The Court of Cassation interprets this text broadly: the mental element of the offence (the intention) is not the will to harm, but the awareness of the disturbance caused.

In other words, it is sufficient that the person knows they are disturbing and does nothing to stop disturbing. It does not matter that they have a good reason (working, partying, etc.). The trial judges (the magistrates who judge the facts) have sovereignly assessed that Mr X had been warned by the neighbours and had taken no measures to reduce the noise, such as placing insulation around the engines. His passivity constitutes the offence.

This decision is a confirmation of previous case law. It is neither a reversal nor an evolution, but a firm reminder: the rights of one person end where the abnormal neighbourhood disturbance begins. The Court of Cassation thus rejects Mr X's argument that the absence of intent to harm excludes the offence. It specifies that the intentional element is constituted by the awareness of the disturbance and the absence of corrective measures. This is a protective position for victims of noise nuisances.

What this changes for you — concretely

If you are a landlord (you rent out a property), this decision concerns you directly. Imagine that your tenant in Sotteville-lès-Rouen complains about the noise of a professional neighbour. You must know that this neighbour cannot hide behind his professional activity to justify night noise. As an owner, you can act, but it is mainly the disturbed tenant who must file a complaint or take action. If you are yourself a professional, this decision is a warning: you must take all possible technical measures to limit noise (soundproofing, adapted hours). Failing that, you risk a fine (5th class offence, up to €1,500, or even €3,000 for repeat offence) and damages (compensation) for the harm suffered by the neighbours.

For an individual suffering nuisances, this decision gives you leverage. If your neighbour says "I'm working, I have the right", you can reply that awareness of the disturbance is sufficient. You must first warn him in writing (registered letter with acknowledgement of receipt) so that he cannot claim to be unaware of the disturbance. Then, have the noise recorded by a bailiff, as in the case judged. The bailiff's report costs between €150 and €300, but it is solid evidence. Finally, file a complaint at the police station or gendarmerie, or seize the police court. You can also bring a civil action (before the judicial court) to obtain damages. The amount may vary: for a disturbance lasting several months, courts often award between €500 and €3,000 depending on the severity.

If you are a buyer of a property, check potential noise nuisances before buying. A noisy professional neighbour can devalue your property. Find out about neighbours' activities, visit at different times, and do not hesitate to request acoustic diagnostics.

Four tips to avoid this type of dispute

• Act at the first signs: If you are disturbed, talk to your neighbour. A dialogue can resolve the problem without proceedings. If the noise persists, send a registered letter with acknowledgement of receipt to formalise your request. This establishes proof that the neighbour is aware of the disturbance.
• Have the nuisances recorded by a bailiff: A bailiff's report is irrefutable evidence. It describes the noise, its intensity, duration, and time. This document is essential for any legal action. Do not wait months: the sooner you act, the sooner the disturbance stops.
• Propose amicable solutions: Before filing a complaint, propose technical solutions to your neighbour: installing insulation, moving the machine, limited hours. If you are the professional, implement these measures immediately after being warned. Your good faith will be recognised.
• Consult a lawyer specialising in property law: A professional will help you assess your chances, build a solid file, and choose the appropriate procedure (criminal and/or civil). In Mont-Saint-Aignan as elsewhere, a lawyer can make a difference.

Further reading: related case law and developments

The decision of 17 January 1990 is part of a consistent line. Already, a judgment of the Court of Cassation of 8 March 1988 (No. 86-95.476) had held that night noise is constituted even if the noise is unintentional, as long as its author was warned and did not react. More recently, case law has extended this principle to daytime noise: the judgment of 23 November 2016 (No. 15-85.383) specifies that daytime noise (noise disturbing the tranquillity of the place) also does not require intent to harm. The trend is therefore clear: judges protect the neighbourhood against noise nuisances, whether professional or not.

For the future, this decision remains a cornerstone. With the rise of teleworking and home-based craft activities, neighbourhood conflicts related to noise are likely to increase. Judges will have to apply these principles, perhaps by specifying what constitutes a "sufficient measure" to remedy the disturbance. In the meantime, the rule is simple: if you know you are disturbing and you do nothing, you are at fault.

In practice: what to do

Checklist: "What to do if you suffer professional night noise?"

1. Identify the source: Note the days, times, duration and nature of the noise. Record it with your phone (note: a recording alone has limited evidentiary value, but it can help).
2. Warn the perpetrator: First orally, then by registered letter with AR. Keep a copy.
3. Have it recorded: Instruct a bailiff to make a report. The cost varies, but you can claim it in court if you win.
4. File a complaint: At the police station or gendarmerie, or directly by letter to the Public Prosecutor. You can also seize the police court by direct citation (with the help of a lawyer).
5. Bring a civil action: In parallel, you can claim damages before the judicial court for abnormal neighbourhood disturbance. This action is independent of the criminal complaint.
6. Consult a lawyer: From the outset, a lawyer will guide you and maximise your chances.

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