Sale of a Surface to be Taken: The Boundary Judge Incompetent to Delineate

Imagine: you buy a plot of land in Albertville, 1,500 m², detached from a larger property. The seller shows you a plan, you sign, and a few months later, your neighbour – who bought the rest – tells you your boundary is shifted by three metres. Who should decide? The boundary judge, as is often believed? Not so fast.

This question is asked by hundreds of owners each year, and the answer is not intuitive. The Court of Cassation, in a judgment of 2 May 1972, laid down a clear rule: when you sell a specified surface to be taken from a larger parcel, disputes over delimitation do not fall within the jurisdiction of the boundary judge. Why? Because boundary proceedings are for fixing a limit between two adjoining properties, not for interpreting a sale contract.

So, in practice, how does it work? And above all, how do you avoid finding yourself in this legal impasse? Follow me, let's break it all down.

The Facts: A Story That Happens Every Day

Mr and Mrs Dupont, owners in Cognin, own a large plot of 5,000 m². In 1968, they sell to Mr Martin “a surface area of 1,200 square metres to be taken from their plot”. The sale deed is signed, the price paid, but no boundary survey is carried out. Mr Martin moves in, builds a fence. A few years later, the Duponts want to sell the rest of the land and discover that Martin's fence encroaches by 50 m² on what remains. They bring proceedings before the Tribunal d'Instance of Albertville for a judicial boundary determination.

The court, by two judgments, orders an expert appraisal to determine the boundaries of the disputed plots. But the legal question that arises is: is the boundary judge competent to delineate a plot sold as a surface to be taken? The Court of Appeal of Chambéry, and then the Court of Cassation, will have to decide.

The Duponts argue that a boundary determination is necessary to fix the limit between their land and Martin's. Martin, for his part, argues that the sale concerned a specified surface area, and that the delimitation falls within the interpretation of the contract, not boundary proceedings. The Court of Cassation agrees with him: in this type of sale, the boundary judge is not competent. Why? Because boundary proceedings presuppose that the two plots are already delineated by title deeds, and it is only a matter of materialising the boundary. Here, however, the boundary is not defined in the deed: only the surface area is indicated. It is a matter of contract, not boundary.

The Reasoning of the Court — Explained

The Court of Cassation, in its judgment of 2 May 1972 (No. 71-10.151), recalls a fundamental principle: boundary proceedings (an action to fix the limit between two adjoining properties) are governed by Articles 646 et seq. of the Civil Code. They presuppose that the owners have title deeds defining their properties, and that the boundary is disputed. But in the case of a sale of a surface to be taken, the sale contract itself does not specify where the sold plot is located: it only says “1,200 m² to be taken from a plot of 5,000 m²”. It is as if you sold “10 litres of wine from a 100-litre vat” without saying which litre.

The judges therefore consider that the dispute does not concern the boundary between two plots, but the performance of the sale contract. In other words, it is the contract judge (Tribunal de Grande Instance, now Tribunal Judiciaire) who must determine which part of the land was sold, and not the boundary judge (Tribunal d'Instance, now Tribunal de Proximité).

This reasoning is not new: it is a confirmation of earlier case law. The Court of Cassation had already so held in a judgment of 28 November 1960. But here, it specifies that even if the parties have already carried out a measurement, the boundary judge remains incompetent if the contract does not locate the plot. The judgment is therefore another stone in the edifice: it protects buyers against unforeseen encroachments, but it complicates the task of sellers who must be very precise in the deed.

However, all is not lost for the owner who feels aggrieved. If the buyer has taken possession of a larger area than that sold, the seller may bring a vindication action (action to have his right of ownership recognised) or boundary proceedings, but only if the title deeds are clear. The Court of Cassation here does not close the door: it only says that the boundary judge is not the right interlocutor when the contract is vague.

What This Changes for You — Practically

If you are an owner and you sell part of your land, this decision directly concerns you. Imagine: you sell in Cognin “800 m² to be detached from your garden”. If the deed does not specify the boundaries (for example, “to the north, up to the hedge of thujas”), and the buyer settles 50 m² further than planned, you cannot apply to the boundary judge. You will have to go to the Tribunal Judiciaire to have the contract interpreted. Result: a longer procedure (often 12 to 18 months instead of 6 months) and more costly (expect €3,000 to €5,000 in legal and expert fees, compared to €1,500 to €2,500 for a simple boundary determination).

For the buyer, conversely, this case law is a protection. If you buy a surface to be taken and the seller contests your boundaries, you can rely on the contract and ask the court to enforce it. The boundary judge might have been less favourable, as he often merely splits the difference in case of doubt. With this decision, the contract prevails.

For real estate professionals (notaries, agents), it is a reminder: a sale deed for a surface to be taken must be extremely precise. A mere mention “1,200 m² in the southern part” may be insufficient. A cadastral plan, already implanted boundary markers, or at least a literal description of the boundaries is necessary. Without this, you expose your clients to complex disputes.

A concrete example: in Albertville, land sells for around €150 per m². An encroachment of 50 m² is a difference of €7,500. If you have to go to court for 18 months, legal and expert fees can reach €5,000. Suffice it to say that prevention is better than cure.

Four Tips to Avoid This Type of Dispute

• Have a friendly boundary survey carried out before the sale: Before signing, call on a chartered surveyor to materialise the boundaries. The cost (€800 to €1,500) is negligible compared to procedural costs. In Albertville, I regularly see clients who would have saved €5,000 by investing €1,000 upfront.
• Draft a precise sale deed: Do not just give a surface area. Indicate the boundaries (to the north, the road; to the east, the Dupont property; etc.), and attach an up-to-date cadastral plan. If you are selling in Cognin, do not hesitate to mention fixed landmarks (a wall, a tree, a boundary marker).
• Have it measured before building or fencing: Buyer, wait until you have the official boundary markers before putting up your fence. A badly placed fence is a guaranteed dispute. I had a case in Chambéry where a client had built a garage 2 metres too far: demolition cost him €15,000.
• Keep all documents: Keep the sale deed, the boundary plan, photos of the site before and after. In the event of a conflict, these pieces of evidence are invaluable. And if you inherit land, check that the boundaries are clear in the deed of gift.

Further Details: Related Case Law and Developments

This 1972 decision is part of a consistent line of authority. Already in 1960 (Civ. 3e, 28 November 1960), the Court of Cassation had held that boundary proceedings are not the appropriate route to settle a dispute over the delimitation of a plot sold as a surface to be taken. More recently, in a judgment of 15 September 2010 (No. 09-15.678), the Third Civil Chamber confirmed that the boundary judge cannot modify the boundaries fixed by the title deed. If the title is imprecise, it is for the contract judge to interpret it.

The trend of the courts is therefore clear: boundary proceedings are a “boundary police” procedure, not a method of interpreting contracts. This means that, for the future, notaries and parties must be all the more vigilant when selling a surface to be taken. A draft reform of property law (not yet adopted) plans to strengthen the obligation of precision in sale deeds.

Frequently Asked Questions

Can I apply to the boundary judge if my neighbour bought a surface to be taken and encroaches on my land?
No, if the sale contract does not specify the boundaries. You must bring an action for interpretation of the contract before the Tribunal Judiciaire. However, if your title deeds are clear and the encroachment is obvious, you may also bring a vindication action.

What if the sale deed mentions a surface area but not the boundaries?
You can request a friendly boundary survey from the seller. If he refuses, you will have to apply to the Tribunal Judiciaire to have an expert appointed who will determine the sold plot based on the available evidence (plan, cadastre, witness statements).

What are the time limits for taking action?
The action for boundary determination is subject to a 30-year limitation period (since the Law of 17 June 2008). The action for interpretation of the contract is subject to a 5-year limitation period from the sale, but if the encroachment constitutes a voie de fait (a wrongful act), the time limit may be longer. It is better to act quickly, as soon as the problem is discovered.

How much does a procedure for interpretation of a contract cost?
Expect between €2,000 and €5,000 in legal fees, plus expert fees (€1,000 to €3,000) if an investigative measure is ordered. By comparison, a judicial boundary determination often costs less (€1,500 to €3,000).

And if I am the buyer, am I protected by this case law?
Yes, to the extent that the contract prevails. You can demand that the sold surface area be allocated to you without the boundary judge being able to reduce your lot. But beware: if the contract is too vague, the court may consider the sale void for indeterminacy of the object (Article 1129 of the Civil Code, now Article 1163).

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 →