Reference Decision: Court of Cassation, 3rd Civil Chamber • No. 70-10.389 • 17 March 1971 • View the decision →
Imagine: you have just bought a small investment property in Grasse, in the residential quarter of La Parfumerie. Everything seems in order: the seller gave you the planning permission obtained in 1968, and the building has been completed for two years. But one fine morning, your neighbour sues you, claiming that the construction violates the planning rules applicable at the time. He demands demolition and damages. Your notary had assured you that the permission was valid. So, whom to believe? This situation, more common than one might think, was at the heart of a landmark decision of the Court of Cassation in 1971. The case concerned the Paris Region General Development and Organisation Plan (PADOG) and the development plan approved by the 1941 law. But the principles established by the judges apply to all territories, including the French Riviera.
The crux of the problem: a planning permission granted on the basis of a development plan that was no longer in force, because a new plan (the PADOG) had been adopted in the meantime. But the PADOG, a mere policy document, did not automatically replace the old plans. Result: buildings erected under a potentially illegal permission, with consequences for owners and neighbours. What does the Court of Cassation say? That the planning permission, even if granted, does not necessarily cover all irregularities. And that neighbours can take action if their rights are harmed. Analysis.
The Facts: A Story That Happens Every Day
In this case, a property developer had obtained planning permission for a building in the Paris region, based on the Paris region development plan approved by the law of 28 August 1941. This plan set out precise rules on height, density and siting. But in the meantime, the State had adopted the PADOG, a policy plan defining general principles for future inter-municipal local plans. The developer built the building in accordance with the permission, but deviating from the 1941 plan rules. Neighbours then sued the developer and the municipality, arguing that the construction violated the applicable planning rules and caused them harm (loss of sunlight, obstructed view, reduction in property value).
Before the courts, the central question was: which development plan was in force at the time the permission was granted? The developer argued that the PADOG had impliedly repealed the 1941 plan, or at least allowed departure from it. The neighbours argued that the PADOG was merely a framework document, so the old rules remained applicable until local plans were adopted. The Court of Appeal ruled in favour of the neighbours, ordering partial demolition and damages. The developer appealed to the Court of Cassation.
The twist: the Court of Cassation dismissed the appeal, confirming that the PADOG did not automatically replace the 1941 plan. In short, until the local development plan (the current PLU) was approved, the old rules remained in force. The planning permission granted on a wrong basis was therefore illegal, and the construction, although compliant with the permission, violated the planning rules. The neighbours were entitled to seek redress.
The Reasoning of the Court — Dissected
The Court of Cassation relied on Article 35 of the Decree of 27 March 1952 (relating to town planning) and on Article 1240 of the Civil Code (liability for fault: "Any act of man which causes damage to another obliges the person by whose fault it occurred to make reparation"). It first recalled that the PADOG, by its nature, merely defines "the general principles to serve as a basis for the preparation of inter-municipal local development plans." It therefore did not repeal the more detailed provisions of the 1941 development plan. Consequently, "the provisions of the Paris region development plan approved by the law of 28 August 1941 remain applicable in each territory until the approval of the local development plan and the detailed local plan concerning it."
In other words, a general planning document cannot, by itself, terminate the application of an earlier, more detailed plan. This may surprise you, but it is logical: imagine a regional plan stating that "city centres should be densified." That does not mean that local rules on height or setbacks disappear overnight. For the judges, the planning permission granted without verifying compliance with the 1941 plan was tainted with illegality. And this illegality rendered the developer liable, even if the construction complied with the permission. Why? Because the permission does not prevent third parties (neighbours) from complaining about a violation of planning rules that causes them harm.
What few people know is that this decision established an important principle: the grant of planning permission does not cure all irregularities. The civil court can, on the basis of Article 1240, order the demolition of a building erected in breach of planning rules, even if it was authorised by a permission. However, the harm must be certain and direct. undefined, I have come across cases where neighbours have succeeded because the construction blocked their view of the sea in Cannes, or reduced the sunlight on their terrace. But the damage must be proved.
What This Means for You — Practically
Landlord: You bought a building with a planning permission from a few years ago. If a neighbour discovers that the construction violates the planning rules in force at the time of the permission, you could be sued. For example, an owner in Cannes had to demolish an extra storey built with a permission, because the local plan (PLU) prohibited that height. The permission was granted by mistake. Result: demolition costs: €50,000, plus €10,000 in damages to the neighbour. If you are in this situation, you must check the planning rules in force at the date of the permission, not just the current ones.
Buyer: Before buying, ask for a certificate of compliance with the planning permission. If the seller cannot provide one, insist on a warranty in the sale deed. In case of a hidden defect (non-compliant construction), you can bring an action for hidden defects (Article 1641 of the Civil Code). An example: a buyer in Grasse obtained a €30,000 price reduction because the garage was not compliant with the permission.
Neighbour: If a new construction causes you harm (loss of light, obstructed view, reduction in value), you can sue the owner and the municipality. But note: the limitation period is 5 years from completion of the works (Article 2224 of the Civil Code). After that, you are time-barred. And you must prove the harm (expert report, photos, property valuations).
Co-owner: If works in the common parts violate planning rules, the management company must stop them. An example: in Cannes, a co-ownership had to demolish a communal veranda because it exceeded the permitted height. The management company was ordered to pay €5,000 in damages for failure to maintain.
Four Tips to Avoid This Type of Dispute
- Check the planning rules applicable at the date the permission was granted. Do not rely solely on the permission. Consult the town hall archives or a chartered surveyor. A simple check can save you from demolition.
- Insist on a certificate of compliance when buying. Ask the seller to provide a certificate of conformity (CERFA) or a notarial certificate. If refused, negotiate a price reduction or a warranty clause.
- If a dispute arises with a neighbour, try mediation first. Legal fees and judicial expert costs can exceed €10,000. Free conciliation is available before a justice of the peace conciliator.
- Keep all planning documents. Keep the permission, plans, correspondence from the town hall. In proceedings, you will need to prove that you complied with the rules in force.
- Insure your property against construction defects. The ten-year warranty (10 years) covers damage affecting the structure, but not planning violations. A specific "legal protection" insurance may be useful.
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Further Analysis: Related Case Law and Developments
The 1971 decision is part of a consistent line of the Court of Cassation. It was confirmed by a judgment of 28 March 1973 (No. 71-13.567) where the Court held that a planning permission granted in violation of the local land use plan (POS) is not enforceable against third parties. More recently, in a judgment of 10 September 2015 (No. 14-17.392), the Court clarified that demolition can be ordered even if the building is completed and compliant with the permission, as long as the permission has been annulled for abuse of power. The trend is therefore towards increased protection of neighbours' rights. However, since the ALUR law of 2014, courts are more reluctant to order demolition if it is disproportionate to the harm (for example, a simple height excess of 50 cm may be compensated by damages). But in cases of flagrant violation (building in a non-constructible zone), demolition remains the rule.
Summary and Next Steps
FAQ
Q: Can I challenge a planning permission granted 10 years ago?
R: Yes, if you are a neighbour and the construction causes you harm. But the limitation period is 5 years from completion of the works (Article 2224 of the Civil Code). After that, you are time-barred.
Q: What should I do if my permission is annulled after construction?
R: You may be ordered to demolish or pay damages. It is possible to regularise if the construction complies with the new PLU. Consult a lawyer promptly.
Q: What are the costs of a planning defect lawsuit?
R: Expect €3,000 to €10,000 in legal fees, plus expert costs (€1,500 to €5,000). If demolition is ordered, costs can exceed €50,000.
Q: Can I buy a property with a non-compliant planning permission?
R: Yes, but you take a risk. Insist on a warranty clause in the sale deed. You can also ask the seller to regularise before the sale.
Q: My neighbour is building without planning permission, what can I do?
R: Report it to the town hall. You can also bring an interim injunction to stop the works. If the building is completed, you can seek demolition.
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