Construction Without Planning Permission: A Third Party Cannot Claim Demolition Without Proving Direct Loss

You live in Saint-Malo, and for six months your neighbour has been carrying out work without authorisation. A party wall has been exceeded, a terrace encroaches on the view, the building work drags on. You wonder: can you demand the demolition of this building erected without planning permission? The answer is less straightforward than it seems.

The question every owner asks: "Can I bring legal proceedings to have what has been illegally built razed?" The Court of Cassation, in a judgment of 17 November 1971 (No. 69-13.989), gives a nuanced answer: no, not without proving that this building violates planning servitudes (public rules protecting the general interest) and causes you personal loss.

This judgment, handed down over fifty years ago, remains an absolute reference for neighbour disputes relating to the absence of planning permission. It establishes a simple rule: administrative irregularity does not automatically give a right to demolition. You still need to demonstrate concrete damage. Let us decipher this landmark decision together.

The Facts: A Story That Happens Every Day

The case begins in Redon, Ille-et-Vilaine. An owner, whom we shall call Mr Y, obtains several successive planning permissions to erect a building on his land. These permissions are granted by the mayor, but are subsequently annulled by the administrative court for a procedural defect (an error in the procedure). Despite these annulations, Mr Y continues the work and completes his building.

A neighbour, Mr X, owner of an adjoining house, considers that this building causes him loss: it blocks his view, reduces the value of his property, and above all, it was built without valid permission. He sues Mr Y in court to obtain the demolition of the structure.

Before the Tribunal de Grande Instance of Rennes, Mr X succeeds: the judges order demolition, considering that the absence of permission alone justifies demolition. Mr Y appeals. The Rennes Court of Appeal upholds the judgment. Mr Y then appeals to the Court of Cassation. The Court of Cassation quashes the appeal judgment and remands the case, on the ground that the mere lack of permission is not enough: it is necessary that the building violates a planning servitude (a substantive rule, not just a formality) and that the neighbour suffers direct loss from it.

The Reasoning of the Court — Explained

The Court of Cassation, in its judgment of 17 November 1971, relies on Article 1240 of the Civil Code — then Article 1382 — which provides: "Any act of man whatsoever, which causes damage to another, obliges the person by whose fault it occurred to repair it." In other words, to obtain a remedy (here demolition), one must prove a fault (building without permission), a loss (the damage suffered) and a causal link between the two.

The judges of the Supreme Court specify that the mere fact of building without permission, or with an annulled permission, does not in itself constitute a sufficient fault to support a demolition action. It is not because the permission is void that the building is necessarily unlawful on the merits. It must be shown that the building violates a planning servitude — for example, a rule on height, setback (distance from boundaries) or ground coverage — and that this violation causes loss to the neighbour.

The Court thus makes a fundamental distinction between administrative legality (the permission) and substantive legality (compliance with planning rules). A permission may be annulled for a procedural defect, but if the building complies with the substantive rules, it is not "faulty" in the civil sense. The third party cannot therefore demand demolition without establishing this twofold element: violation of a planning servitude and personal loss.

This judgment confirms constant case law: the right of property is not absolute, but its protection cannot be invoked lightly. The Court of Cassation intends to avoid procedural abuses where a malicious neighbour could have a building demolished simply because the permission was tainted by a formal defect, without the building causing any real disturbance.

What This Means for You — Practically

For the owner who builds: you must always obtain a valid planning permission, but even if it is subsequently annulled, your building is not automatically doomed to demolition if it complies with planning rules. Example: in Saint-Malo, if your permission is annulled for an omission in the file, but your house complies with the maximum height of 9 metres and the distances of 3 metres from boundaries, your neighbour will not be able to obtain demolition without proving concrete loss (loss of sunlight, obstructed view, etc.).

For the neighbour who suffers: you cannot act solely on the basis of the absence of permission. You must show that the building violates a planning rule (for example, the Local Urban Plan of Rennes requires a setback of 5 metres, and the building only respects 2 metres) and that this violation causes you damage: loss of market value of your property (quantified by an expert), loss of enjoyment (noise, overlooking view), etc. A quantified example: an owner in Redon obtained €15,000 in damages for loss of view over the Vilaine, because the neighbouring building exceeded the authorised height by 2 metres.

If you are in this situation, you must first consult your commune's PLU to check the applicable rules, then gather evidence of the loss: photos, witness statements, expert report. The time limit to act is 5 years from completion of the works (Article 2224 of the Civil Code).

Four Tips to Avoid This Type of Dispute

• Before buying land or a house, check the conformity of existing constructions with the PLU: ask the seller for planning permissions and certificates of conformity. In Saint-Malo, a buyer discovered that the veranda of his future home exceeded the authorised height by 1.5 metres: he negotiated a price reduction of €20,000.
• If you are building, use an architect or a planning consultancy firm: a declaration error can lead to the annulment of the permission. In Redon, an individual lost his permission for failing to mention a swimming pool on the site plan: the construction was nevertheless compliant, but the procedural defect cost 3 years of proceedings.
• In case of dispute, first try mediation or a bailiff's report: before bringing a demolition action, have the loss recorded by a commissaire de justice (formerly bailiff). The cost (around €150) is low compared to a judicial procedure costing several thousand euros.
• Keep all documents relating to your construction: permission, plans, correspondence with the town hall, photos of the works. In the event of annulment of the permission, these elements will allow you to prove that the building complies with the substantive rules and to avoid demolition.

Further Reading: Related Case Law and Developments

The 1971 decision has been confirmed and refined by the Court of Cassation on several occasions. For example, in a judgment of 28 January 2009 (No. 07-20.676), the Court held that the demolition of a building erected without planning permission can only be ordered if the loss is "certain and current": a mere risk of diminution in value is not enough. Similarly, in a judgment of 13 September 2018 (No. 17-22.367), the judges recalled that the violation of a planning servitude must be "characterised": a mere procedural irregularity is not sufficient.

Court trend: judges are increasingly demanding on proof of loss. They often require a judicial expert report to quantify the damage, which makes proceedings heavier. Conversely, the trend is to protect the good faith builder: if the permission was granted by the town hall, even if later annulled, the builder can rely on legitimate expectation to avoid demolition (except in cases of fraud).

For the future, the reform of contract law and civil liability (Ordinance of 10 February 2016) did not change the substance of the rule: Article 1240 of the Civil Code remains the basis. But case law tends to clarify the concept of "abnormal neighbourhood disturbance", which could offer an alternative route to the third party: even without violation of a servitude, a disturbance exceeding ordinary neighbourhood inconveniences may justify damages, or even demolition in extreme cases.

Frequently Asked Questions

1. Can I obtain demolition of a building that encroaches on my land, even without planning permission? Yes, in that case it is an encroachment (violation of your right of property), which is direct loss. The 1971 judgment does not apply, as it concerns a planning servitude, not a private right.
2. What should I do if my neighbour builds without planning permission and I suffer loss of view? First check whether the PLU imposes a minimum distance or maximum height. If so, and if these rules are violated, you can act. Otherwise, you will need to prove that the loss of view is "abnormal" in the sense of neighbourhood disturbance.
3. What is the time limit to bring a demolition action for lack of planning permission? The civil liability action is time-barred after 5 years from the day on which the claimant knew or ought to have known the facts enabling him to act (Article 2224 of the Civil Code). In practice, from completion of the works.
4. Can I claim damages without seeking demolition? Yes, absolutely. This is often the most realistic solution: you obtain compensation for the loss of value of your property or loss of enjoyment, without going through a long and costly demolition procedure.
5. If the planning permission is annulled, is the building automatically illegal? No, the annulment of the permission does not make the building illegal on the merits. It is merely deprived of authorisation. The town hall may regularise the situation by issuing a new permission, if the building complies with the PLU.

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 →