Disturbance of Enjoyment in Co-owned Property: When Neighbour’s Works Become Abusive

Imagine: you live in Schiltigheim, in a posh 1930s building. Your south-facing terrace is your little piece of paradise. One morning, workers arrive at your upstairs neighbour's flat and extend their roof by one metre, right above your head. Goodbye sunshine, hello shade and noise nuisance. What can you do when the general meeting has given the green light but your peace is shattered?

The French Supreme Court (Cour de cassation) settled this question in 1998 in a ruling that remains a benchmark for all co-owners. The message is clear: a majority authorisation is not enough to eliminate an abnormal neighbourhood disturbance (i.e., a nuisance that exceeds what one is normally obliged to tolerate between neighbours). And above all, judges must examine concretely whether this disturbance alters the way you enjoy your flat or terrace.

So, what does the law actually say? And how can you protect yourself if you are in a similar situation, whether in Strasbourg, Lyon, or Marseille? Full analysis.

The Facts: A Story That Happens Every Day

In this case, two co-owners of a Parisian building (but the lesson applies throughout France, from Strasbourg to Perpignan) undertook works to extend their roof over the part of their terrace adjoining the lot of their neighbours, the Nkaké couple. The latter, owners of a flat directly below, found themselves with a roof overhang that reduced their view, sunlight, and, according to them, created noise nuisances (sound of rain, animals passing by, etc.).

The works had been authorised by the general meeting of co-owners by the majority required under Article 25(b) of the Law of 10 July 1965 (simple majority of all co-owners' votes). The Nkaké couple did not challenge this decision within the two-month legal deadline. Thinking everything was in order, the neighbours carried out the works. But the Nkaké couple, considering their peace was seriously disturbed, took legal action to obtain the demolition of the extension.

The Court of Appeal dismissed their claim, ruling that the works were consistent with the building's purpose and that the alleged disturbance of enjoyment did not exceed normal neighbourhood inconveniences. In short, according to the lower court, it had to be accepted as ordinary neighbourly annoyance. The Nkaké couple then appealed to the Supreme Court (pourvoi en cassation) to review the application of the law.

The Reasoning of the Court — Explained

The Supreme Court quashed (annulled) the appeal decision. Why? Because the Court of Appeal did not go far enough in its analysis. It merely noted that the works were authorised and that the disturbance was 'normal' in its view. But it did not consider whether this disturbance altered the conditions of enjoyment of the private parts of the Nkakés' lot.

The legal basis? Article 544 of the Civil Code (right of ownership) and the theory of abnormal neighbourhood disturbances (developed by case law from Article 1240 of the Civil Code, which requires compensation for damage caused by one's fault). In essence, even if works are authorised by the community of co-owners, they may constitute an abuse of right (an excessive use of one's right of ownership) if they cause a neighbour a disturbance that exceeds the ordinary inconveniences of community life.

What is innovative here is that the Supreme Court requires lower courts to verify a specific point: does the disturbance affect the conditions of enjoyment of the private unit? For example, a terrace that loses all sunlight, a flat that becomes noisy due to a roof, a blocked view... All this may constitute a modification of the conditions of enjoyment, even if the general meeting's authorisation is valid.

The Court does not question the validity of the authorisation (it was not challenged in time), but it clearly distinguishes two things: the law of co-ownership (which governs relations between co-owners) and the ordinary law of civil liability (which protects each owner against abuses).

What This Changes for You — Practically

This decision is a powerful weapon in the hands of any co-owner suffering from works carried out by a neighbour. Here is what it implies depending on your situation.

If you are a co-owner suffering from works: You do not have to put up with excessive nuisance, even if the general meeting voted in favour. You can act on the basis of abnormal neighbourhood disturbance. However, the disturbance must be real, objective, and exceed normal inconveniences. Example: a 30% loss of sunlight on your terrace in Strasbourg could be deemed abnormal. However, a temporary shadow will not suffice. You have a limitation period of 5 years from the manifestation of the damage (since the 2008 reform).

If you are a co-owner planning works: Even with authorisation in hand, you must ensure you do not cause excessive disturbance to your neighbours. Before undertaking works, have an impact study carried out on neighbouring lots: loss of light, view, noise... If the risk is established, it is better to negotiate an amicable solution (compensation, modification of the project) to avoid a lawsuit. A concrete example: in Schiltigheim, a roof extension of 1.20 m cost €8,000 in works, but compensation for disturbance of enjoyment reached €15,000.

If you are a co-ownership manager (syndic): You must be vigilant when preparing the agenda for general meetings. Before submitting modifying works for a vote, check their potential impact on neighbouring lots. A failure to inform may render you liable. Do not hesitate to request an independent technical opinion.

Four Tips to Avoid This Type of Dispute

• Before any works, consult a lawyer specialised in property law. A simple 30-minute consultation (often charged between €60 and €120) can save you months of proceedings. In Strasbourg, Maître Zakine receives by appointment to analyse your project and its risks.
• Have a bailiff's report made before and after the works. This official document (costing about €200) will prove the initial state of your lot and the modifications suffered. Indispensable to demonstrate an abnormal disturbance.
• Negotiate an amicable solution before taking legal action. Offer your neighbour mediation or compensation. Most disputes are settled amicably. If you are in Schiltigheim, the town's justice conciliator can help you free of charge.
• Act quickly. The deadline to challenge a general meeting decision is two months. To act on the basis of abnormal disturbance, you have 5 years. But the longer you wait, the harder it will be to prove the link between the works and the disturbance.

Further Reading: Related Case Law and Developments

This 1998 ruling is part of a line of cases protecting co-owners' rights. A few years later, the Supreme Court specified that abnormal disturbance may exist even if the works comply with the co-ownership rules (Cass. 3e civ., 19 May 2004, n°02-20.102). More recently, it held that loss of sunlight can be compensated even in the absence of noise nuisance (Cass. 3e civ., 10 September 2015, n°14-20.324).

The trend is therefore towards increased protection of the owner against encroachments and nuisances. Judges no longer hesitate to order the demolition of even authorised constructions if they cause excessive disturbance. Conversely, if the disturbance is minor or if the claimant consented to the works, the claim may be rejected.

For the future, the question of proportionality is central. Courts will increasingly have to balance the property right of the builder and that of the neighbour, relying on precise technical expertise. In Strasbourg, as elsewhere, local case law follows this national trend.

Frequently Asked Questions

1. Can I obtain the demolition of works authorised by the general meeting? Yes, if these works cause you an abnormal neighbourhood disturbance. The meeting's decision is not a blank cheque. You must prove that the nuisance exceeds normal inconveniences.
2. What is the deadline to take legal action? To challenge the authorisation itself: 2 months after the general meeting. To act on the basis of abnormal disturbance: 5 years from the day you suffered the damage. Do not delay.
3. How much does a neighbourhood disturbance procedure cost? Legal fees vary: count €1,500 to €3,000 for an urgent application (référé), €3,000 to €8,000 for a full trial. In addition, there are expert fees (€1,000 to €3,000) and bailiff fees. But compensation can cover these costs.
4. What should I do if my neighbour refuses to stop the works? Apply to the urgent applications judge (juge des référés) of the competent judicial court (e.g., that of Strasbourg for facts in the Bas-Rhin). In an emergency, the judge can order the works to stop under a penalty payment (astreinte).
5. Can I be compensated for the loss of value of my property? Yes, if the works reduce the value of your lot (e.g., loss of view, sunlight). A property expert can estimate this decrease in value. For example, in Schiltigheim, a terrace losing 40% of its sunlight may see its value drop by 10 to 15%.

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