Chartered Surveyor: Monopoly Confirmed for Setting Property Boundaries

Imagine you own a beautiful villa with a garden in Cagnes-sur-Mer, on the heights overlooking the Mediterranean. You wish to sell part of your land to your neighbour so they can enlarge their swimming pool. You agree on the new boundary, you draw a line on the ground, you sign a little paper between yourselves. Everything seems settled, doesn't it?

But what happens when, ten years later, the purchaser of your neighbour's property challenges this boundary, arguing that it encroaches on their property? Or worse, when the land registry service refuses to register the modification because the documents are not compliant?

This is precisely the question answered by the ruling of the Court of Cassation of 8 November 2022. The judges forcefully remind us that certain acts concerning property boundaries fall within the monopoly of chartered surveyors, and this, even when the concerned owners are in agreement between themselves. A decision that goes well beyond a simple professional conflict and that affects every owner, every purchaser, every real estate professional.

The Facts: A Story as Happens Every Day

Mr Martin, owner of a 2,000 m² plot of land in Cagnes-sur-Mer, wishes to subdivide his parcel to sell a part to his neighbour, Mr Dubois. They agree together on the new boundary that will separate their future properties. Rather than calling upon a chartered surveyor, Mr Martin contacts a land surveyor (a distinct profession, without the title of expert) to prepare the necessary documents.

This land surveyor produces two survey documents (precise record of the boundaries and area of a plot of land) that record the new subdivision (division of a parcel into several lots). These documents are then certified and numbered by the land registry service. Everything seems regular: the two owners are in agreement, the documents are registered.

But the Order of Chartered Surveyors files a complaint against the land surveyor for illegal practice of the profession. According to them, the acts performed – setting new boundaries and creating real rights (rights attached to a property, such as ownership or an easement) – fall exclusively within the monopoly of chartered surveyors, defined by law. The land surveyor defends himself by arguing that he only prepared fiscal documents, without land consequence (without impact on the property itself), and that in any case, the owners were in agreement.

The criminal court convicts him. He appeals. The court of appeal confirms the conviction, considering that the documents indeed had the effect of setting new boundaries and creating real rights, regardless of the parties' agreement. The land surveyor appeals to the Court of Cassation, but the highest court rejects his appeal on 8 November 2022, thus validating the interpretation of the lower courts.

The Court's Reasoning — Analysed

The judges' reasoning rests on a clear legal foundation: Article 1 of the law of 7 May 1946, as amended, which reserves to chartered surveyors acts whose purpose is to set the boundaries of land property and to create real rights attached thereto. In other words, the law establishes a professional monopoly for these sensitive technical and legal acts.

The Court of Cassation approves the court of appeal which sovereignly assessed (without its assessment being challengeable, except for error of law) the nature of the documents. The judges consider that these survey documents were not simple fiscal documents, but that they indeed had the effect of setting new boundaries of land property. In short, they modified the physical and legal reality of the properties.

A crucial point of the decision: the Court emphasises that this effect of setting boundaries exists regardless of whether the current owner and the future purchaser are in agreement. This is where the decision takes on its full significance. Even an amicable agreement between neighbours is not sufficient to circumvent the chartered surveyor's monopoly when the act has this scope. Why? Because these acts commit the future: they create rights that will be binding on future owners, neighbours, and the administration (land registry).

The Court thus validates consistent case law: these acts participate in the drafting of conveyancing or declaratory deeds of property (deeds that transfer or record ownership, such as a deed of sale or a boundary agreement). They are often the necessary preliminary step. By reserving them to chartered surveyors, the law guarantees their technical reliability and legal security.

What This Changes for You — Practically

But what exactly does this change for you, owner, tenant, or real estate professional? Let's take concrete examples.

If you are a landlord in Nice and you wish to subdivide your land to build an additional house to let, you cannot call upon a simple surveyor or an architect friend to trace the new boundaries. You must obligatorily go through a chartered surveyor registered with the Order. undefined, I have encountered cases where owners had plans drawn up by a non-expert to save €1,500 to €2,000. Result: during the sale of the lot, the notary refused the deed, everything had to be redone with a chartered surveyor, with additional delays of 3 to 6 months and doubled fees.

If you are a purchaser of a plot of land in Cagnes-sur-Mer resulting from a subdivision, systematically check in the sale file that the subdivision documents were prepared by a chartered surveyor. Ask to see their registration number with the Order. Otherwise, you risk, in turn, not being able to resell the property or seeing a neighbour challenge the boundaries. The cost of subsequent regularisation can reach €3,000 to €5,000, depending on the complexity.

If you are a tenant of a house with a garden whose owner is considering a subdivision, this decision protects you indirectly. It guarantees that the boundaries will be established with precision, avoiding neighbourhood conflicts that could affect your peace and quiet.

If you are a co-owner and the co-ownership decides to sell a part of the common areas (a piece of garden, for example), here again, the subdivision must be carried out by a chartered surveyor. A simple decision of the general meeting is not sufficient.

Be careful however: not all land surveys fall within this monopoly. A survey for a swimming pool project or a fence, without modification of the legal boundaries, can often be done by another professional. The boundary is fine, hence the importance of consulting.

Four Tips to Avoid This Type of Dispute

• Always check the professional's qualification before entrusting them with work touching on the boundaries of your property. Demand their registration number with the Order of Chartered Surveyors and verify it online. A land surveyor or a DPLG surveyor (diplômé par le gouvernement) does not have the title of expert and cannot perform these acts.
• Be wary of verbal agreements or little papers between neighbours to set a new boundary. Even with the best will in the world, without a deed prepared by a chartered surveyor, this agreement will have no value against the land registry or a future purchaser. Always have a boundary agreement (deed that definitively sets the boundaries) prepared by a chartered surveyor.
• Anticipate delays and costs in your projects. The intervention of a chartered surveyor for a simple subdivision generally takes 2 to 4 months (survey, file, deposit with the land registry) and costs between €1,500 and €4,000 depending on the region and complexity. On the Côte d'Azur, rather count €2,500 to €5,000. Integrate this expense from the start of your budget.
• Consult a notary or a specialised solicitor in advance if you have a doubt. A consultation of 30 to 45 minutes (approximately €45 to €80) can save you thousands of euros in proceedings and months of stress. The notary who will draft the deed of sale will refuse to do so if the subdivision is not regular.

In-Depth Analysis: Related Case Law and Developments

This decision fits within consistent case law of the Court of Cassation. Already, in a ruling of 13 January 2016 (No. 14-87.237), the Court had reminded that acts of boundary setting (fixation of boundaries) and subdivision fall within the monopoly of chartered surveyors, even when carried out amicably. It regularly rejects appeals that attempt to restrict this monopoly to contentious situations.

What few people know is that this case law also protects purchasers. By imposing the intervention of an expert, it guarantees a certain objectivity and technicality that secure transactions. The trend of the courts is clear: they interpret the monopoly strictly to avoid future disputes over the demarcation of properties, a source of many conflicts (approximately 15% of real estate disputes according to barometers).

For the future, this decision confirms that the legislator and judges prioritise legal security and the protection of third parties (future purchasers, neighbours) over the simple immediate will of the parties. An evolution to be welcomed, as it prevents often inextricable situations.

Summary and Next Steps

Here is a checklist of what to do if you are concerned:

1. You plan to subdivide your land (in Nice, Cagnes-sur-Mer or elsewhere): contact without delay a chartered surveyor registered with the Order. Do not sign any preliminary agreement with a neighbour without their advice.
2. You are buying a plot of land resulting from a subdivision: ask to see the attestation of the chartered surveyor who prepared the documents. Verify that the subdivision plan is indeed annexed to the notarised deed of sale.
3. You discover that irregular documents were used for a previous subdivision: consult a specialised solicitor to assess the risks and means of regularisation (often possible, but costly).
4. You are in conflict with a neighbour over a boundary: have the disagreements recorded by a chartered surveyor with a view to a boundary agreement, even amicable. Avoid forceful measures (unilateral fencing) that would worsen the situation.

Do you find yourself in a similar situation? A first consultation of 30 minutes with Maître Zakine (€45) can save you months of proceedings — and often much more. Book an appointment →