Boundaries
What to do if a neighbour disagrees with the boundary
Updated: 2026-07-15
First, data: the objective measurement
Most boundary conflicts are sustained on assumptions: each party believes the limit is where they remember or where it suits them. The reasonable first step is to replace opinions with a technical measurement of the plot, compared with the deed and Catastro.
With a measured plan on the table, many disputes cool down: both parties see the same data.
Agreement with data is the cheapest path
If the measurement clarifies the position of the limit and both parties accept it, the agreement can be documented and, if you want more firmness, formalised with notarial intervention. This scenario is usually faster and much cheaper than any contentious alternative.
Neither the technician nor anyone else can force the neighbour to accept a boundary willingly: the measurement provides the objective evidence, but acceptance is voluntary until there is a court ruling.
If there is no agreement: legal action
When the disagreement persists, there is the judicial demarcation procedure. In it, the court appoints the expert who will determine the limit: neither party chooses the judicial expert.
The prior technical documentation (measurement, plans and documentary comparison) remains very useful as party evidence for your lawyer, even though the final determination belongs to the court expert and the judge.