Illegal View Over Party Wall: Prescription Can Regularise a Prohibited Opening

Imagine the scene: you have just bought a beautiful village house in Grasse, with a walled garden. You are enjoying your terrace when, suddenly, your neighbour, Mr. Martin, opens a window in the wall separating your two properties. Problem: this wall is a party wall, you are co-owners in equal shares. Under Article 675 of the Civil Code, neither neighbour may, without the other's consent, make any opening in a party wall, nor affix or lean any structure against it. Yet Mr. Martin has pierced a window and, for years, he has enjoyed an uninterrupted view over your garden. What can you do? Can he regularise this situation by invoking acquisitive prescription? The Court of Cassation ruled on this question in a judgment of 10 April 1975 (No. 73-14.136).

But what exactly does that change? The decision clarifies that an opening made in a party wall contrary to the prohibition of Article 675 is capable of being acquired by prescription (i.e., by passage of time) when it constitutes a right of view (direct or oblique view) and not a mere light opening (an opening that does not allow a view into the neighbour's property). In other words, if your neighbour opened a window in the party wall more than thirty years ago without your objection, he may have definitively acquired the right to it. This decision, handed down by the Third Civil Chamber of the Court of Cassation, remains authoritative today.

undefined, I have encountered cases where owners, often in Sophia-Antipolis, find themselves with views created by the previous owner without authorisation. The dispute can last for years. Understanding this case law is essential for any owner, tenant or property professional faced with a party wall. Let us examine the facts of this case.

The Facts: A Story That Happens Every Day

In this case, the Admiral spouses owned a house in Brudieu (in the Aude). Their house adjoined that of their neighbour, Mr. de Cave. Between the two properties stood a party wall. At an undetermined time, but before 1940, the predecessors in title of the Admiral spouses had pierced an opening in this party wall to create a view over the neighbouring property. Later, they even built a staircase and a terrace outside the wall, encroaching on the neighbour's land.

Mr. de Cave, considering that this opening was unlawful (contrary to Article 675 of the Civil Code) and that the construction of the staircase and terrace constituted an encroachment (unauthorised occupation of his land), sued the Admiral spouses to have the view removed and to obtain damages. He argued that the opening was merely a light opening (a means of letting in light without a view) and that, in any event, it could not be acquired by prescription because its situation was precarious (tolerated, without right).

The Montpellier Court of Appeal, in a judgment of 14 May 1973, partially ruled in favour of Mr. de Cave: it ordered the Admiral spouses to pay damages for the encroachment, but it refused to order the removal of the view. It held that the opening, although originally unlawful, had become a right of view acquired by thirty-year prescription (thirty years of peaceful and uninterrupted existence). Mr. de Cave appealed to the Court of Cassation.

Before the Court of Cassation, the neighbour argued that openings in a party wall, made without opposition from the neighbour, have only a precarious existence based on pure tolerance and can therefore never be acquired by prescription. But the Court of Cassation did not follow this reasoning. It upheld the appeal judgment, on the ground that the opening constituted not a mere light opening, but a right of view, and that it could be prescribed. The Court thus validated the principle that acquisitive prescription is possible for an unlawful view over a party wall, provided it is not a mere light opening.

The Reasoning of the Court — Analysed

The heart of the legal debate concerns the interpretation of Article 675 of the Civil Code, which provides: "One of the neighbours may not, without the consent of the other, make any opening in the party wall, nor affix or lean any structure against it." This prohibition is absolute. However, the Civil Code also provides for the possibility of acquiring a servitude (a real right over another's property) by prescription, i.e., by continuous, uninterrupted, peaceful, public, unequivocal possession as owner for thirty years (former Article 2229, now Article 2258 of the Civil Code).

The question was therefore: can an unlawful opening in a party wall be acquired by prescription? The Court of Cassation answers in the affirmative, but on an essential condition: it must not be a mere light opening. What is a mere light opening? It is an opening that does not allow a view into the neighbour's property (for example, a light shaft, a small opening with a fixed opaque frame). In contrast, a right of view allows a view (direct, oblique or panoramic).

Note, however, that prescription only runs if the possession is peaceful and unequivocal. If the neighbour opposed the opening from its creation or if the view was tolerated (without formal opposition but without title), the possession may be considered precarious. What few people know is that tolerance does not prevent prescription if it lasts thirty years without opposition. In this case, the Court of Appeal had found that the opening had existed for more than thirty years and that Mr. de Cave had not opposed it. The Court of Cassation validates this sovereign assessment by the trial judges.

In short, this judgment marks a partial reversal: the Court of Cassation admits that prescription can regularise a violation of Article 675, contrary to what some had argued (the precariousness of possession). This is a liberal development, favourable to the owner who has allowed the situation to persist. But the distinction between light opening and view remains crucial.

What This Means for You — Concretely

If you own a property in Grasse or Sophia-Antipolis, and your neighbour pierced a window in the party wall more than thirty years ago, you can no longer demand its removal if it constitutes a view. On the other hand, if it is only a mere light opening (an opening that does not allow a view), you can still demand its removal, because a mere light opening cannot be prescribed. However, if the view is less than thirty years old, you can take legal action to have the opening removed and obtain damages.

For a tenant: if you rent a house and notice an unlawful view, you must inform your landlord. It is the landlord, as co-owner of the wall, who has standing to act. You cannot act alone.

For a purchaser: before buying a property, check for the existence of views over the party wall. If a view was created without authorisation, inquire about its age. A view older than thirty years is regularised. A recent view may be a source of dispute. In a property transaction in Sophia-Antipolis, a developer bought a plot of land with a party wall that had a view. The previous owner had not disclosed it. The purchaser had to negotiate compensation with the neighbour to avoid a lawsuit. Cost: €5,000 in legal fees and €15,000 in compensation.

If you are a co-owner of a party wall, you must be vigilant: any opening must be authorised by the other co-owner. If you wish to create a view, have a servitude agreement (notarial deed) drawn up to avoid any future dispute. Otherwise, you risk an action for removal and damages.

In practice, if you are in this situation, you should: 1) Check the age of the view (thirty years or not). 2) Gather evidence (photos, witness statements, notarial deeds). 3) Consult a solicitor specialising in property law. A lawsuit can cost between €2,000 and €8,000 depending on complexity.

Four Tips to Avoid This Type of Dispute

• Never pierce an opening in a party wall without your neighbour's written consent. A simple verbal agreement can be disputed. Have a servitude agreement drawn up by a notary by way of an authentic deed. This will save you years of litigation.
• If you notice an unlawful view at your neighbour's, act quickly. Do not wait thirty years. Send a recorded delivery letter with acknowledgement of receipt to formally oppose it. Keep a copy. This opposition interrupts prescription.
• Before buying a property, have a notary verify the state of servitudes. Request a certificate of non-prescription. If a view exists, inquire about its date of creation. You may also call upon a surveyor to measure the regulatory distances.
• If you inherit a property with a disputed view, do not let the situation become established. You can bring an action for removal within thirty years of the opening. After that period, the view is acquired. Consult a solicitor to assess your chances.

Besoin d'un conseil personnalisé ? Contactez Maître Zakine — première consultation 30 min à 45€.

Further Detail: Related Case Law and Developments

This 1975 decision is part of a consistent line of case law. Before this judgment, some courts considered that any opening in a party wall was precarious and could not be prescribed. The Court of Cassation clarified the distinction between light opening and view. Since then, case law has confirmed this position. For example, in a judgment of 24 March 1993 (No. 91-16.045), the Third Civil Chamber held that a view opened in a party wall for more than thirty years could be acquired by prescription, even if the opening had been made without authorisation. The trend is therefore liberal: time can cure unlawfulness.

For the future, the question arises whether prescription can be invoked for views created after the entry into force of the ALUR law (2014) which strengthened co-ownership rules. It seems that the principle remains the same, but judges are stricter on proof of peaceful possession. In any event, this 1975 decision remains an essential reference.

In Practice: What to Do

Checklist for the owner faced with an unlawful view:

1. Identify the nature of the opening: is it a mere light opening (no view) or a right of view? Take photos, measure the distance from the neighbouring property.
2. Date the opening: how long has it existed? More than thirty years? Less? Consult notarial deeds, old photos, witnesses.
3. Take legal action if less than thirty years: sue the neighbour for removal of the view and damages. The limitation period for the action is thirty years from the opening.
4. If more than thirty years: check whether the possession was peaceful and unequivocal. If so, the view is acquired. You can no longer act.
5. Consult a solicitor: an initial analysis can assess your chances. Maître Zakine offers a 30-minute consultation at €45 to guide you.

In summary, this 1975 Court of Cassation decision is a double-edged sword: it can regularise an old situation, but it does not forgive inaction. If you are concerned, do not wait.

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