What is abnormal neighbourhood nuisance?

A standalone no-fault liability regime

Everyone must put up with the normal inconveniences of communal life: a neighbour's occasional noise, the presence of a shop, the comings and goings in a building. Liability is only triggered when the nuisance goes beyond this threshold of normality and becomes abnormal. It is this excessive character, and not any fault, that grounds the right to compensation.

Long a purely case-law principle, it was codified by Act no. 2024-346 of 15 April 2024, in force since 17 April 2024, which created Article 1253 of the French Civil Code. The text provides that the person causing a nuisance exceeding the normal inconveniences of neighbourhood is liable as of right for the resulting harm. The victim therefore does not have to prove any fault: it is enough to establish the nuisance, its abnormal character and the link with the neighbour.

How the abnormal character is assessed

No text sets a numerical threshold above which a nuisance would become abnormal. Article 1253 merely refers to nuisance that exceeds the normal inconveniences of neighbourhood: the characterisation therefore rests on an assessment in concreto, case by case, which the lower courts carry out in their sovereign discretion.

In practice, several factors combine: the intensity of the nuisance, its duration, its repetition over time, but also the moment at which it occurs. To this is added the context: the same noise, the same smell or the same smoke is not assessed in the same way in a dense city centre, a suburban housing estate or a rural area. The victim's particular sensitivity, however, is not the benchmark: what is sought is the objective excess measured against what a neighbour must normally put up with in that environment.

Who can be held liable

Article 1253 designates broadly the persons who may answer for the nuisance: the owner, the tenant, the occupant without title, the holder of a right whose main purpose is to authorise them to occupy or operate land, as well as the project owner (maître d'ouvrage) or the person exercising its powers. An owner who lets out property may thus be pursued for the nuisance caused by the activity they authorised, and the project owner of a building site for construction nuisance.

The pre-existence exception and the case of farming activities

Article 1253 provides for an exception known as antériorité (pre-existence), close to the theory of prior occupation: liability is not incurred where the nuisance comes from activities existing before the deed transferring ownership or enjoyment of the property to the injured person, or, failing a deed, before that person took possession. Those activities must, however, comply with laws and regulations and have continued under the same conditions, or under new conditions that do not cause the nuisance to worsen.

This pre-existence exception applies subject to Article L. 311-1-1 of the French Rural and Maritime Fishing Code, which organises a protection of its own for pre-existing farming activities. The 2024 Act was precisely intended to secure those activities against claims by new neighbours.