Right to Light: The 30-Year Prescription Excludes Any Other Prescription (Cass. civ., 21 May 1979)

Imagine the scene: you have just bought a charming villa in Mandelieu-la-Napoule, with a stunning sea view. You are enjoying your terrace when, suddenly, your neighbour begins building a wall that will block your panorama. You check your deed of sale: nothing is mentioned about a right to light. Yet, your living room window has existed for over thirty years. Are you protected? This question is asked by hundreds of property owners each year, whether on the Côte d'Azur or in the Landes.

The law of easements (these real rights burdening one estate for the benefit of another) is a complex area, where limitation periods play a crucial role. A right to light is said to be 'continuous and apparent': continuous because its exercise does not require repeated human action (the view exists permanently), apparent because it manifests through a visible sign (a window, a French window). The law provides that such easements can be acquired by prescription (prolonged possession without opposition). But what duration? Thirty years or ten years? Confusion was common.

The decision of the Court of Cassation of 21 May 1979 (No. 77-14.873) settled this debate clearly and definitively: the only prescription applicable to continuous and apparent easements is the 30-year prescription, to the exclusion of any other prescription, notably the 10-year prescription. In other words, to acquire a right to light merely by the passage of time, one must prove peaceful and unequivocal possession for thirty years. This principle, although old, remains an absolute reference in all neighbour disputes. Let us dissect this case and its practical implications.

The facts: a story like many that happen every day

The case pits two neighbouring owners in the south of France against each other. Mr. Chabas, owner of a villa in Vallauris (famous for its pottery and artists' studios), had long enjoyed an unobstructed view from his property. His windows, genuine French windows (and not mere skylights or basement windows), offered a perspective over the surrounding landscape. However, his neighbour, Mr. X, undertook constructions which, according to Mr. Chabas, threatened to block this view.

Mr. Chabas then sued his neighbour to have the existence of a right to light acquired by prescription recognised. He argued that his windows had existed for more than ten years, and that the 10-year prescription (which applies, for example, to discontinuous easements like a right of way) should suffice. The court of first instance ruled in his favour, considering that possession for ten years was sufficient to acquire a right to light.

But the neighbour, dissatisfied, appealed. The Court of Appeal reversed the judgment: it held that the applicable prescription was the 30-year prescription, not the 10-year one. Mr. Chabas then appealed to the Court of Cassation. In this judgment of 21 May 1979, the Court of Cassation dismissed his appeal and confirmed the position of the Court of Appeal. In short, the High Court recalled that, for continuous and apparent easements (such as a view), only a period of thirty years allows them to be acquired by prescription. This solution is based on Article 690 of the Civil Code, which states that continuous and apparent easements are acquired by title (written deed) or by thirty years' possession.

The reasoning of the court — broken down

The Court of Cassation relies on a precise legal reasoning. Article 690 of the Civil Code provides: 'Continuous and apparent easements are acquired by title, or by possession for thirty years.' This article is the cornerstone of the decision. But why exclude the 10-year prescription? Because the 10-year prescription (provided for in Article 689 of the Civil Code for discontinuous easements) only concerns easements that require a human act to be exercised (like a right of way, which must be used regularly). A view, on the other hand, is permanent: it is exercised without continuous human intervention. It therefore falls under continuous easements.

The Court also specifies that the windows in question must be 'real windows' (openable, allowing a direct view) and not mere skylights (fixed openings that only let in light). In this case, the disputed windows were indeed standard windows, which characterised an apparent right to light. Thus, the condition of appearance was satisfied.

What few people know is that this decision was not unanimous at the time. Some judges believed that the 10-year prescription could apply if the possession was peaceful and unequivocal. But the Court of Cassation put an end to this controversy: the 30-year prescription is the only applicable one. undefined that to acquire a right to light, the owner must prove that the windows have existed for thirty years without challenge from the neighbour. If the neighbour has allowed it for thirty years, he can no longer object.

However, beware: prescription does not operate if the view was created in violation of planning rules (for example, a window installed without respecting legal distances). The possession must be 'useful', i.e., peaceful, public, unequivocal, and as owner. The mere passage of time is not enough; the owner must have behaved as the true holder of the easement.

What this means for you — practically

This decision has major implications for owners, buyers, and property professionals. Here is what you need to remember according to your profile.

For the owner of a villa in Mandelieu or Vallauris: if you have a window that offers a view over the neighbouring property, and that window has existed for less than thirty years, you cannot rely on an easement acquired by prescription. Conversely, if it has been there for more than thirty years without opposition, you are protected. But beware: proving this thirty-year possession can be difficult. You will need documents such as old photographs, witness statements, earlier notarial deeds, etc. undefined, I have come across cases where owners had to provide extracts from the Napoleonic cadastre to prove the existence of a window in the 19th century.

For the buyer: before purchasing a property with a good view, check the notarial deed to see if a right to light is mentioned. If not, ask the seller to provide evidence of thirty-year possession. Otherwise, you could find yourself in a situation where the neighbour builds a wall that blocks your view, without you being able to do anything. A concrete example: in Vallauris, a developer bought a plot with a view over the Bay of Cannes. He did not check the easement. A few years later, the neighbour built a three-storey building, completely obstructing the view. The developer lost his case for lack of proof of thirty years' possession.

For the tenant: you cannot acquire an easement by prescription, as you are not the owner. Only the owner can do so. But if you suffer a loss of view, you may be able to claim a rent reduction or terminate the lease for disturbance of enjoyment.

For the co-owner: in co-ownership, rights to light may concern private or common parts. If a window of a co-owner has existed for more than thirty years, it may constitute an easement in favour of their unit, even if the co-ownership regulations do not mention it. This can complicate projects for raising floors or altering facades.

Four tips to avoid this type of dispute

• Check the history of your windows before any property purchase. Ask the seller for old photos, plans, neighbour statements, or cadastral extracts. If the view is crucial to you, insert a clause in the deed of sale recognising the existence of a right to light acquired by thirty-year prescription.
• If you plan to build or alter your property, consult a lawyer specialising in property law. Before starting works that could block your neighbour's view, have the situation analysed. A mistake can be costly: damages, demolition, etc. For example, in Mandelieu, an owner had to demolish a 2-metre high boundary wall he had erected without checking existing easements.
• In the event of a dispute, gather evidence as early as possible. The thirty-year prescription requires solid evidence. Do not wait until the conflict escalates. Take dated photos, have a bailiff make a report, collect written testimonies. The earlier you act, the better your chances of proving your possession.
• Negotiate an amicable solution before going to court. A lawsuit over an easement can last several years and cost thousands of euros. Propose a transaction to your neighbour: for example, compensation in exchange for recognition of the easement, or a land swap. Most disputes are settled amicably if both parties act in good faith.

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Further reading: related case law and developments

The 1979 decision is not isolated. It is part of a consistent line of case law from the Court of Cassation. For example, a judgment of 13 May 1975 (No. 73-14.320) had already established the principle that continuous and apparent easements can only be acquired by title or by thirty-year prescription. More recently, the Court of Cassation reaffirmed this solution in a judgment of 6 July 2017 (No. 16-19.233), specifying that the thirty-year prescription applies even if the easement was created by a void or non-existent deed.

The trend in the courts is therefore very clear: no ten-year prescription for views. This means that owners must be vigilant. A notable development is the influence of planning law: since the SRU law of 2000, the rules on distances between buildings (notably Article 678 of the Civil Code) are often recalled. But they do not affect acquisitive prescription. In other words, even if a window complies with legal distances, it must have existed for thirty years to be protected as an easement.

For the future, we can expect judges to continue applying this principle strictly. Property professionals (notaries, agents, developers) have every interest in systematically checking the age of openings in transactions. The digitisation of cadastral archives facilitates these searches, but complexity remains.

Summary and next steps

FAQ:

1. What is the prescription period for a right to light? Thirty years, exclusively.

2. Can I acquire a right to light if my window is less than thirty years old? No, unless you have a title (notarial deed) that mentions it.

3. What if my neighbour builds and blocks my view? First check if you benefit from a right to light acquired by thirty-year prescription. If so, you can demand demolition and damages. If not, you have no recourse, unless the construction violates planning rules.

4. How to prove thirty years of possession? By any means: photos, testimonies, notarial deeds, cadastre, bailiff's report, etc.

5. Does the thirty-year prescription also apply to rights of way? No, rights of way are discontinuous; they are also acquired by thirty-year prescription, but case law also admits the ten-year prescription in some cases. Be careful, the regime differs.

Checklist if you are in dispute:

1. Identify the date of creation of the window (or opening).
2. Gather evidence of possession (photos, testimonies, deeds).
3. Consult a lawyer specialising in property law to assess your chances.
4. Consider mediation or a transaction before starting proceedings.
5. If you take action, issue a summons as soon as possible to prevent the other party from acquiring prescription.

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 →