Reference Decision: cc • No. 08-16.324 • 2009-06-17 • View the decision →
Imagine you own a flat in a residential building in Tarnos, near Mont-de-Marsan. Every quarter, you receive your co-ownership service charge statement and notice that the amount seems abnormally high compared to your neighbours. You feel you are paying more than your fair share, but you hesitate to challenge it: is it really an error in apportionment or simply a poor estimate? How can you assert your rights without embarking on a complex procedure?
This situation, which I have encountered several times in my practice between Mont-de-Marsan and Tarnos, is at the heart of an important decision by the Court of Cassation. Co-owners often wonder if they can take action when they suspect an overvaluation of service charges, even without being able to prove a misunderstanding of the legal criteria for apportionment. The answer, as you will see, is more accessible than it seems.
The judgment of 17 June 2009 precisely clarifies this point: an action for the revision of shareholdings (the shares of charges allocated to each unit) can be brought even if the owner primarily invokes an overvaluation of service charges. In other words, you are not required to demonstrate a technical error in the apportionment to obtain justice. But what does this change concretely for you?
The Facts: A Story That Happens Every Day
The story begins with an owner, whom we will call Madame Martin, who owns a flat in a co-ownership. Like many owners in Mont-de-Marsan or neighbouring communes such as Tarnos, she regularly receives her service charge demands. Over the years, she notices that her shareholdings (the shares that determine her contribution to common charges) seem too high relative to the reality of her unit.
Madame Martin decides to call in a surveyor-expert to check these shareholdings. This professional, after examination, confirms her suspicions: the shareholdings allocated to her unit are indeed overvalued. The error, according to the expert, likely dates back to November 1972, well before Madame Martin's acquisition. In a letter addressed to the co-ownership managing agent, she clearly sets out the problem: "the overcharge in shareholdings" constitutes, in her view, the essence of the dispute.
Faced with the managing agent's refusal to proceed with a rectification, Madame Martin initiates legal proceedings. She does not merely invoke a simple overvaluation of service charges—she requests the revision of the shareholdings themselves. The judicial trajectory then experiences several twists: the court of appeal must precisely qualify the nature of her action. Is it a simple challenge of charges or a genuine action for the revision of shareholdings? The answer to this question will determine the outcome of the dispute.
undefined, I have encountered cases where owners in Tarnos hesitated to act because they thought they had to prove a complex technical error in the apportionment of charges. Madame Martin's story shows that sometimes it is enough to demonstrate a significant overvaluation to succeed. But how did the judges analyse this situation?
The Court's Reasoning—Analysed
The court of appeal, then the Court of Cassation, had to decide an essential question: what is the exact nature of the action brought by Madame Martin? The owner primarily invoked an overvaluation of service charges, but the magistrates examined whether this nonetheless corresponded to an action for the revision of shareholdings provided for by Article 12 of the Law of 10 July 1965.
Article 12 of the Law of 10 July 1965 (which governs the co-ownership statute) precisely provides for the possibility of revising shareholdings when they no longer correspond to reality. The judges noted a crucial point: even though Madame Martin spoke of "overvaluation of service charges", the surveyor's expertise and the analysis of the situation revealed in reality a problem of overvalued shareholdings. In other words, the substance of the dispute concerned the apportionment itself, and not simply the amount of the charges.
The Court of Cassation confirmed the reasoning of the court of appeal: the action indeed constituted an action for the revision of shareholdings. The magistrates emphasised that the contractual origin of the shareholdings (i.e., their establishment by contract or initial deed) did not prevent their revision when an error was demonstrated. The error dated from 1972, but it persisted and still affected the owner at the time of the dispute.
What few people know is that the precise legal qualification of an action can determine its success or failure. Here, by qualifying the action as an action for the revision of shareholdings rather than a simple challenge of charges, the judges allowed Madame Martin to benefit from the more favourable legal regime provided by the 1965 Law. But what does this change concretely for owners, tenants, and real estate professionals?
What This Changes for You—Concretely
If you are a co-owner in Mont-de-Marsan or the surrounding area, this decision directly concerns you. Imagine you own a 70 m² flat in a residential building where your shareholdings cause you to pay €1,200 in annual service charges, while your neighbour with a similar flat pays only €900. Before this decision, you might have been less likely to challenge, thinking you had to prove a complex technical error. Now, you know that a simple demonstration of overvaluation may suffice.
For landlord owners (who rent out their property), the issue is twofold. On one hand, overvalued charges reduce your rental yield. On the other hand, if you must pass on a portion of the charges to your tenant (as is often the case for co-ownership service charges), an error in the shareholdings can lead to disputes with the latter. undefined, I have encountered cases where landlords in Tarnos had to refund overpayments to their tenants after a revision of shareholdings.
For tenants, this decision is also important. If you notice that the recoverable charges you pay seem abnormally high, you can encourage your landlord to check the shareholdings. A vigilant tenant can thus avoid paying excessive charges for years. However, be cautious: the tenant cannot directly bring an action for the revision of shareholdings—only the owner or the co-owners' association has this prerogative.
For purchasers of a property in co-ownership, this decision underscores the importance of checking shareholdings before purchase. A diligent notary in Mont-de-Marsan will advise you to carefully examine the co-ownership regulations and the descriptive schedule of division. If you discover after acquisition that the shareholdings are overvalued, you now have favourable case law to have them rectified. How should you react in this case?
Four Tips to Avoid This Type of Dispute
- Systematically check shareholdings before purchasing a property in co-ownership: ask your notary to compare the shareholdings with the actual surface area and situation of the unit. A significant discrepancy should alert you.
- Carefully keep all documents relating to charges: demand notices, regulations, account statements. These documents will be essential if you need to challenge shareholdings.
- Call in a surveyor-expert if in doubt: as in the commented case, an expert can note an overvaluation and produce a report that will be authoritative before the courts.
- Act quickly as soon as you notice an anomaly: limitation periods (the deadlines beyond which you can no longer act) can vary, but the longer you wait, the more you risk losing significant sums.
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Deep Dive: Related Case Law and Developments
The decision of 17 June 2009 fits into a jurisprudential trend favourable to co-owners. Already, in a judgment of 6 March 2002 (No. 99-21.168), the Court of Cassation had recalled that the action for the revision of shareholdings could be brought even several years after the establishment of the shareholdings, provided the error persisted. This case law has been confirmed and clarified by the judgment we are commenting on.
However, there are divergent decisions on certain technical points, particularly concerning proof of error. Some courts of appeal require a more rigorous demonstration than others. The general trend of the courts is nevertheless clear: they increasingly readily recognise the right of co-owners to have manifestly erroneous shareholdings revised.
For the future, this jurisprudential evolution means that co-ownership managing agents and association boards will have to be particularly vigilant in establishing and verifying shareholdings. Real estate professionals in Mont-de-Marsan and the Landes will need to integrate this case law into their practices to avoid disputes. But concretely, what should you do if you find yourself in a similar situation?
In Practice: What to Do
If you suspect an overvaluation of your charges linked to erroneous shareholdings, here is the course of action:
- Gather your documents: co-ownership regulations, descriptive schedule of division, all your service charge notices from recent years.
- Compare your shareholdings with those of similar units: ask the managing agent (respecting confidentiality) for the shareholdings of other units comparable to yours.
- Consult a professional: a lawyer specialised in real estate law or a surveyor-expert can help you assess the situation.
- Attempt mediation: before initiating legal proceedings, propose mediation to the managing agent to find an amicable solution.
- Initiate legal proceedings if necessary: if mediation fails, an action for the revision of shareholdings before the judicial court may be necessary.
In short, this decision strengthens the rights of co-owners facing overvalued shareholdings. It demonstrates that judges know how to distinguish the substance of a dispute behind the terms used by the parties. For Madame Martin, as for all owners in a similar situation, it is an important victory that can translate into substantial savings on service charges.
Do you find yourself 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 →

