Breach of Planning Regulations: Your Neighbour Is Building Without Permission, What Can You Do?

Imagine: you live in Redon, in the peaceful district of the station. One morning, you notice that your neighbour has started extension works. Problem: his new construction easily exceeds the height limits set by the Local Planning Plan (PLU). Worse, it deprives you of sunlight and encroaches on your privacy. You are furious, but what can you do? Go to court? Criminal law can penalise the offence, but rarely order demolition. And civil law? Until 1977, the answer was unclear. That is when the French Supreme Court, in a landmark ruling of 22 November 1977, changed the situation: now, a private individual can invoke a breach of planning regulations before a civil judge, provided they prove direct personal harm. In other words, you are not obliged to wait for the administration to act. You can act yourself, and demand demolition.

The Facts: A Story That Happens Every Day

Mr Dupont, a property owner in Vitré, built an extension to his house without complying with the local planning regulations concerning setbacks (minimum distances from property boundaries) and sunlight. His neighbour, Mr Martin, complained: the construction cast a shadow over his property and reduced his view. Mr Martin filed a criminal complaint, and Mr Dupont was convicted for building without planning permission. However, the criminal judge did not order demolition, considering that the construction could be regularised. Dissatisfied, Mr Martin then brought a civil claim seeking demolition. The question before the French Supreme Court was: can a private individual, before a civil court, invoke a breach of administrative planning regulations to obtain demolition, even though the criminal court did not order it? The Court answered yes, subject to two conditions: the individual must prove personal harm, and that harm must be directly caused by the breach.

The Court's Reasoning — Analysed

The French Supreme Court relied on Article 1240 of the French Civil Code (formerly Article 1382), which provides that 'any act of a person which causes harm to another obliges the person by whose fault it occurred to make reparation'. Here, the fault is the breach of planning regulations. But note: not every neighbour can sue. The breach must cause personal and direct harm. For example, loss of sunlight, obstructed view, or a decrease in property value. The Court also clarified that a criminal judgment that does not order demolition does not have absolute res judicata effect on the civil claim. In other words, the civil judge is free to order demolition, even if the criminal judge did not. This reasoning is a major development: previously, some courts held that a private individual could not rely on planning rules, which were reserved for the relationship between the administration and the builder. Now, the private individual is a full-fledged actor in protecting his living environment.

What This Means for You — Practically

This decision has immediate practical implications:

• Neighbouring owner: If your neighbour builds in breach of the PLU, you can take legal action to obtain demolition, provided you prove your harm. For example, in Vitré, if a construction blocks your view of the valley, you can claim damages or demolition.
• Purchaser: Before buying a property, check that all constructions comply with the PLU. If not, you could be exposed to a demolition action by a neighbour.
• Tenant: You suffer a loss of sunlight or view? You can act, but your harm must be personal (e.g., your home is directly affected).
• Co-owner: If a co-owner carries out works that do not comply with the PLU, the management company can act, but each affected co-owner can also act individually.

Practically, if you are in this situation, you must gather evidence: photos, a bailiff's report, witness statements, and above all an extract of the PLU showing the breached rule. Then, you can bring a claim before the civil court (tribunal judiciaire). Note: time limits are short (5 years from completion of the works to claim demolition). Legal and expert fees may be incurred, but a successful action can result in damages (a few thousand euros) or demolition (costs borne by the builder).

Four Tips to Avoid This Type of Dispute

• Check the PLU before any property purchase: Go to the town hall or your municipality's website (e.g., Redon, Vitré) to check the rules applicable to the plot. A notary can also help.
• Have a boundary survey before building: A boundary survey (precise delimitation of property boundaries) avoids encroachments and setback conflicts.
• Obtain all necessary permits: A planning permission, prior declaration or development permit are mandatory. Never start works without authorisation.
• In case of dispute, act quickly: Do not wait until the works are completed. An interim injunction (référé) can suspend the works. Consult a lawyer lawyer at the first signs of non-compliance.

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Further Analysis: Related Case Law and Developments

This 1977 ruling has been confirmed by consistent case law. For example, the French Supreme Court held in 2015 (Civ. 3e, 4 February 2015, no. 13-27.254) that a breach of a subdivision regulation can be invoked by a private individual if he suffers harm. More recently, in 2021, the Court clarified that the harm can simply be loss of sunlight or view, without needing to prove financial loss. The trend is therefore towards greater protection of the neighbour, but with a requirement to prove personal harm. In the future, civil judges may be increasingly inclined to order demolition, especially if the construction is manifestly excessive.

In Practice: What to Do

Here is a checklist for action if you are a victim of a PLU breach:

1. Note the breach: Take photos, note dates, take approximate measurements. If possible, have a bailiff's report prepared (cost approx. €200-300).
2. Check the PLU: Obtain an extract of the PLU from the town hall (free). Identify precisely the rule breached (height, setback, footprint, etc.).
3. Assess your harm: Loss of sunlight, obstructed view, reduction in property value. A property expert can estimate the loss in value (allow €500-1500 for an expert report).
4. Send a formal notice to the builder: Send a registered letter with acknowledgement of receipt requesting cessation of works and restoration of the previous state. This may suffice to settle the dispute amicably.
5. Bring a claim before the court: If the formal notice fails, consult a lawyer specialising in property law. You can apply for an interim injunction to suspend the works, or bring a main claim for demolition and damages.

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