Illegal Practice of Surveyor-Expert: What the Court of Cassation Says

You have just bought a plot of land in Mont-de-Marsan, and your neighbour is disputing the boundary. The surveyor you instructed tells you that he can carry out the boundary determination. But is this legal? I hear this question almost every week in my office. The decision of the Court of Cassation of 16 May 2006 (No. 05-82.870) provides a valuable answer: a topographical surveyor can carry out preparatory surveying work without being prosecuted for illegal practice of the profession of surveyor-expert, provided that this work does not directly aim to fix the boundaries of land property. In short, the boundary between the two professions is more subtle than it appears. But then, who can do what? And above all, how can you be sure that your boundary determination will be valid? Let's dive into this case that shook the world of real estate in the Landes region.

The facts: a story that happens every day

In 2001, in Biscarrosse, an owner, Mr X, wishes to divide his land to sell a plot. He instructs a topographical surveyor, Jean-Paul, to prepare a surveying document to be filed with the land registry (cadastre). Jean-Paul carries out the on-site surveys, determines the areas, and submits his work to a surveyor-expert who signs the final document. But then: the Order of Surveyors-Experts files a complaint, considering that Jean-Paul has encroached on reserved competences. The case ends up before the criminal court of Mont-de-Marsan, then on appeal in Pau, and finally in cassation. The prosecution argues that Jean-Paul performed acts reserved for surveyors-experts, in particular the fixing of boundaries. But the defence argues that he only carried out technical surveys, without ever deciding where the boundary markers should go. The Court of Appeal rules in his favour, and the Court of Cassation confirms: Jean-Paul's work did not directly have the purpose of fixing the boundaries of land property and defining the rights attached thereto. In other words, a topographical surveyor can prepare the ground, provided that he does not decide the legal issues of ownership.

The reasoning of the court — dissected

The Court of Cassation relies on Article 1 of the Law of 7 May 1946 (which reserves boundary determination and delimitation operations to surveyors-experts) and on Article 34 of the Law of 27 February 2002 (which defines their monopoly). But it also recalls that preparatory work, such as topographical surveying, is not prohibited if it is carried out under the supervision of a surveyor-expert. The reasoning is as follows: for there to be illegal practice, the act performed must be a reserved act. However, preparing a surveying document with a view to a parcel division, without deciding the boundaries, is not a reserved act. Be careful, however: if the topographical surveyor had himself proposed boundary markers or fixed boundaries, he would have fallen foul of the law. What few people know is that this decision has been criticised by some practitioners because it creates a grey area. But it has the merit of clarifying that simple technical surveying is not prohibited. undefined, I have come across cases where owners had a survey carried out by a topographical surveyor, and the boundary determination was contested. The 2006 case law is often used against them to validate the approach, provided that the surveyor-expert supervised.

What this changes for you — concretely

For an owner in Mont-de-Marsan, this decision means that you can use a topographical surveyor for preparatory division work, provided that you then go through a surveyor-expert for the legal validation. But be careful: if the topographical surveyor exceeds his role, the boundary determination may be annulled. Concrete example: in Biscarrosse, an owner had a division plan prepared by a topographical surveyor, then sold a plot. The buyer contested the boundaries, and the court had to check whether the topographical surveyor had fixed the boundaries or simply recorded the measurements. In this case, the topographical surveyor had noted dimensions without indicating boundary markers, and the sale was validated. But if you are a buyer, I advise you to check that the surveying document is signed by a surveyor-expert. For a tenant, this is less relevant, but if you rent land, know that boundaries must be fixed by a qualified professional. In a condominium, the managing agent must ensure that divisions of lots are carried out by a surveyor-expert. How much does it cost? A survey by a topographical surveyor costs between €200 and €500, while a boundary determination by a surveyor-expert can range from €800 to €2,000 depending on complexity. The price difference is explained by the legal liability involved.

Four tips to avoid this type of dispute

• Check the professional's title: Before signing a contract, ask whether the person is a surveyor-expert (registered with the Order) or a topographical surveyor. If it is a topographical surveyor, insist that the final document be countersigned by an expert.
• Do not sign a surveying document without checking the boundaries: If you are an owner, make sure that the boundary markers are placed by a surveyor-expert. A simple topographical plan is not conclusive.
• Keep all documents: Keep contracts, surveys and correspondence. In case of a dispute, you will be able to prove that the topographical surveyor did not fix the boundaries.
• In case of a dispute, consult a lawyer lawyer: Boundary actions are complex. A lawyer can analyse whether the professional exceeded his competences and bring an action for liability.

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Further reading: related case law and developments

Before 2006, case law was stricter. For example, a judgment of the Court of Appeal of Bordeaux of 12 March 1998 had convicted a topographical surveyor for illegal practice because he had himself proposed boundaries. The 2006 decision therefore marks a relaxation. Since then, courts have been attentive to the exact nature of the acts. Another interesting decision is that of the Court of Cassation of 22 January 2014 (No. 12-28.033), which specified that the surveyor-expert can delegate technical tasks to his employees, but not to an unregistered independent contractor. The trend is therefore towards a reinforced protection of the monopoly, while allowing a certain flexibility for preparatory work. For the future, surveyors-experts are pushing for stricter sanctions, but the current case law remains favourable to cautious topographical surveyors.

Frequently Asked Questions

Can a topographical surveyor carry out a boundary determination?

No, boundary determination (which fixes property boundaries) is reserved for surveyors-experts. A topographical surveyor can carry out the surveys, but cannot decide where the boundary markers go.

What if my neighbour contests a survey carried out by a topographical surveyor?

First check whether the final document was signed by a surveyor-expert. If so, it is valid. If not, you can request a judicial boundary determination from the judicial court of Mont-de-Marsan.

What are the risks if a topographical surveyor fixes boundaries?

He faces criminal prosecution for illegal practice of the profession of surveyor-expert (fine of up to €15,000 and prohibition from practising). The owner risks having the boundary determination annulled and having to start over.

Can I use a topographical surveyor to divide my land?

Yes, for technical surveys, but the final surveying document must be prepared and signed by a surveyor-expert to be enforceable against the land registry and third parties.

How much does a boundary determination by a surveyor-expert cost?

Between €800 and €2,000 depending on the area, complexity and region. In Mont-de-Marsan, expect around €1,200 for a standard plot.

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