Amicable Boundary Survey Impossible in Nice: What to Do When Your Neighbor Refuses

LAND — CÔTE D’AZUR

You’ve bought a villa in Nice, up in the hills of Cimiez. The garden is beautiful, but the boundary with the neighbor is unclear. You propose an amicable boundary survey. He refuses. The vast majority of boundary disputes in the Alpes-Maritimes end up in court. Why? Because everyone believes they hold the truth with their own cadastral map and tape measure.

What you see — and what it’s really hiding

On the ground, you see an old wire fence, a leaning low wall, a century-old olive tree. You measure 12 meters from the edge of the road. Your neighbor measures 11.50 m. Who’s right?

What I often find: property owners compare cadastral maps at different scales, or worse, use Géoportail without correcting for parallax. One property owner had measured with Google Maps: a 3.20 m error. The cadastral register is not a surveying document — it’s a tax representation. The only truth is on the ground.

Boundary survey principle: contradictory measurement

The calculations that change everything: the tolerance under Decree 2011-1309

A boundary survey isn’t done with a tape measure. Surveyors use a Leica TS16 total station (angular precision 1″, distance ±1 mm + 1.5 ppm) or GNSS RTK in RGF93/Lambert 93 (planimetric precision ±1 cm). The distance between two existing markers is measured. The legal tolerance is set by Decree 2011-1309: T = (0.05 + 0.01 × √D) meters, where D is the distance in meters.

Concrete example: you measure 12.00 m, the neighbor measures 11.50 m. Difference = 0.50 m. For D = 12 m, T = 0.05 + 0.01 × √12 = 0.05 + 0.0346 = 0.0846 m. The gap is 6 times greater than the tolerance. What this means in practice: an amicable boundary survey is impossible because the positions are too far apart. The court will have to rule based on a court-appointed expert.

What happens if you do nothing

Time is working against you. Without a boundary survey, adverse possession (30 years) could allow the neighbor to claim part of your land. In Nice, given land pressure, a square meter is worth between €500 and €2,000. An encroachment of 5 m² means a loss of €2,500 to €10,000.

In 6 months, the neighbor builds a wall. In 2 years, he fences it off. In 5 years, you can no longer prove the boundary. Court expert fees (€3,000 to €5,000) are far lower than the cost of a lawsuit over encroachment. Frankly, act now.

Recourse and guarantees: what you can demand

Article 646 of the French Civil Code states: « Any property owner may require their neighbor to carry out a boundary survey of their adjoining properties. » A boundary survey is a right. If the neighbor refuses an amicable survey, you must file a claim with the Nice judicial court. The procedure is straightforward: a boundary summons (Art. 646 of the Civil Code and Decree 2011-1309, §2). The judge appoints a surveying expert. Costs are shared. In Nice, expect 6 to 12 months to obtain a ruling. Once the court-ordered boundary survey is issued, the markers become permanent. Send a formal notice by registered letter with acknowledgment of receipt, then consult a real estate lawyer. I can assist you as a surveying expert.

For a boundary survey anywhere in the 06 and 83 departments: our land boundary survey service.

📅 Updated on 25/07/2026 — By Cassini Expertise, independent building expert for the 06 & 83. Free quote: 04 22 46 06 04.

Frequently asked questions

Amicable boundary survey refused by the neighbor, what should you do?

If the neighbor refuses an amicable boundary survey, you can start legal proceedings. The court will then order a judicial boundary survey, carried out by a surveying expert appointed by the judge. Costs are generally shared between the parties.

What is the timeframe for a judicial boundary survey in Nice?

The timeframe for a judicial boundary survey can vary from several months to more than a year depending on the court’s workload and the complexity of the case. After filing the claim, a hearing is scheduled, then the surveyor intervenes. In practice, expect at least 6 to 12 months.

How can I prove that my neighbor is refusing the boundary survey?

It’s advisable to send a formal notice by registered letter with acknowledgment of receipt, requesting agreement on the choice of surveyor. Keep all correspondence and evidence of refusal. These elements will be essential to convince the judge of the need for a judicial boundary survey.

📅 Mis à jour le 25/09/2026 — Cassini Expertise, expert bâtiment indépendant (06·83·13·40).