Boundary Survey: When the Judge Orders an Expert Report Despite Criminal Proceedings

Imagine: you are the owner of a beautiful house in Aytré, with a garden overlooking the sea. One morning, you notice that your neighbour has torn down part of your fence and cut down two old oak trees that marked the boundary between your properties. Furious, you file a criminal complaint (for destruction of property) and, at the same time, you sue your neighbour in the civil court for a boundary survey (official determination of the boundary between the two plots). But the civil judge tells you: “I will order an expert report, and in the meantime, your request for a stay of proceedings (to wait for the outcome of the criminal proceedings) is rejected.” You want to appeal this decision. But can you do so immediately? The question divided the courts for years. The Court of Cassation, in a judgment of 3 April 1973, ruled: yes, you can. And this decision protects your rights.

This decision, made in a boundary dispute case, has a much broader scope. It concerns all judgments which, although apparently “preparatory” (decisions that do not decide the merits of the dispute but organise the rest of the procedure), have a concrete impact on your rights. In other words, if a judge makes a decision that harms you (causes you prejudice), even if it is not the final decision, you can challenge it on appeal. In this article, I will dissect this decision, explain why it is important, and give you practical advice to avoid ending up in a similar situation.

The facts: a story like many that happen every day

Mr Aubry and Mr X are neighbours in Châtelaillon-Plage. Their properties, two beautiful plots with sea views, have never been officially surveyed. One day, a dispute arises: Mr X accuses Mr Aubry of destroying his fence and cutting down trees that, according to Mr X, were on his property. Mr X files a criminal complaint (criminal proceedings for destruction of fence and felling of trees). At the same time, he sues Mr Aubry in the civil court to obtain a boundary survey of their properties and an order requiring Mr Aubry to cut back overhanging branches.

Mr Aubry, on the other hand, disputes this. He argues that the properties were already surveyed in the past (there are old boundary markers) and that, therefore, a new boundary survey is inadmissible. He also asks the civil judge to stay the proceedings (suspend the procedure) until the criminal proceedings are over, arguing that the facts are the same. The civil judge rejects the stay request and, above all, orders an expert report to determine the boundaries of the properties.

Mr Aubry immediately appeals this decision. But the question arises: is this judgment ordering an expert report a “preparatory” judgment? If so, an appeal is not possible immediately (you must wait for the final decision). If not, the appeal is admissible. The Court of Appeal (the second-instance court) held that the judgment was preparatory and declared the appeal inadmissible. Mr Aubry appeals to the Court of Cassation (the highest court).

The reasoning of the court — analysed

The Court of Cassation quashes (annuls) the Court of Appeal's decision. It recalls a fundamental principle: the restriction on the right of appeal imposed by Article 31 of the Code of Civil Procedure (old) only concerns preparatory judgments. So what is a preparatory judgment? It is a judgment which, without deciding the merits of the dispute, orders an investigative measure (such as an expert report) or a provisional measure, and which does not cause prejudice to the parties. But in this case, the judgment did not merely order an expert report: it also rejected the request for a stay of proceedings. This rejection, in itself, causes prejudice to Mr Aubry, because it obliges him to participate in an expert report whereas he wished to await the outcome of the criminal proceedings.

In short, the Court of Cassation says: a judgment ordering an expert report is not automatically preparatory. You have to consider whether it decides a substantive issue or causes prejudice. Here, the rejection of the stay of proceedings is a decision that has a concrete impact on the rights of the parties. It prevents Mr Aubry from benefiting from a possible effect of the criminal proceedings (for example, if the criminal court had found that the trees were not on Mr X's property, this would have influenced the boundary survey). By rejecting the stay, the civil judge made a decision that is not simply preparatory: it is “mixed” (it touches on the merits) and therefore subject to immediate appeal.

What few people know is that the distinction between a preparatory judgment and a mixed judgment is often subtle. undefined, I have come across cases where judges ordered an expert report while rejecting a stay request, and opposing counsel argued that an appeal was not possible. The Court of Cassation clarified: as soon as the judgment rejects a request that has an impact on the merits (such as a stay of proceedings), it is no longer preparatory. This is a protection for litigants: you cannot be forced to participate in an expert report without having the possibility of immediately challenging the decision that imposes that expert report on you.

What this means for you — practically

For a property owner in Aytré or Châtelaillon-Plage, this decision has very practical implications. Take an example: you are a landlord (you rent out your property) and your tenant complains of an encroachment by the neighbour. You start boundary survey proceedings. The judge orders an expert report and rejects your stay request because you have also filed a criminal complaint for trespass. Thanks to this decision, you can immediately appeal the decision rejecting the stay, without waiting for the end of the expert report. This can save you time and money, because if the Court of Appeal rules in your favour, the expert report may be suspended pending the criminal proceedings.

However, be careful: an appeal is not automatically suspensive (the expert report procedure may continue during the appeal, unless you apply for a stay of execution). But the mere fact of being able to challenge the decision immediately gives you leverage to negotiate or to assert your rights. If you are a buyer of an unsurveyed plot, this decision also protects you: if the seller refuses a boundary survey and the judge orders an expert report, you can challenge the conditions of the expert report (for example, if the expert is biased) by appealing, even if the expert report is not yet complete.

Practically, here is what you need to remember: as soon as a judgment imposes a measure on you (expert report, site visit, etc.) while rejecting a request you made (stay, inadmissibility, etc.), that judgment is not preparatory. You can appeal within one month from its service. Do not let this deadline pass, otherwise you will be time-barred (you will lose the right to challenge).

Four tips to avoid this type of dispute

• Have your land surveyed as soon as you buy it. Before signing the sale deed, insist on an amicable boundary survey (between neighbours) or, failing that, a clause in the preliminary contract providing for a judicial boundary survey if necessary. The cost of a surveyor (around €1,000 to €2,000) is negligible compared to the costs of a lawsuit.
• Keep all documents relating to your property. Cadastral plans, notarial deeds, photographs of the premises, statements from former owners. In the event of a dispute, this evidence may avoid a long and costly expert report.
• If a fence or trees are destroyed, file a criminal complaint quickly. The criminal proceedings may result in a conviction that will facilitate the civil boundary survey. And if the civil judge refuses to stay, you can appeal immediately thanks to the 1973 decision.
• Consult a lawyer lawyer before starting proceedings. A lawyer will help you choose the most appropriate strategy: request a stay of proceedings, seek an amicable expert report, or directly start a boundary survey action. A wrong direction can cost you dearly.

Further reading: related case law and developments

The decision of 3 April 1973 is part of a line of case law that protects the right of appeal. Before this decision, some courts considered that any judgment ordering an expert report was preparatory, regardless of its content. The Court of Cassation put an end to this restrictive interpretation. Since then, several decisions have confirmed this position: for example, a judgment that rejects a request for disclosure of documents and orders an expert report is not preparatory (Civ. 2nd, 14 February 1974).

More recently, the Court of Cassation has extended this reasoning to other measures: a judgment that orders an investigative measure while ruling on a procedural objection (such as a preliminary objection) can be immediately challenged. The trend is therefore clear: judges want to avoid decisions that cause prejudice to parties being unchallengeable for months, or even years. In the future, this case law could apply to new situations, such as digital expert reports or provisional measures in co-ownership disputes.

Frequently asked questions

1. What is a preparatory judgment? It is a decision that organises the procedure without deciding the merits of the dispute and without causing prejudice to the parties. Example: a simple order closing the investigation.
2. Can I appeal an order for an expert report? Yes, if the order at the same time rejects a stay request or another request that causes you prejudice. Otherwise, an appeal is only possible with the final decision.
3. What is the deadline for appealing? One month from the service of the judgment (or notification if you are represented by a lawyer). After this deadline, you can no longer challenge it.
4. What if the judge orders an expert report without ruling on my stay request? You can ask the case management judge to decide this issue before the expert report. If he refuses, you can appeal the decision rejecting your request.
5. Is a boundary survey mandatory? No, but in the event of a dispute, any owner can request a judicial boundary survey. The judge may order it even if the other party opposes it.

Are you 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 →