Cluster info · Defects & construction flaws

Bringing the business court for a construction dispute

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By Edouard Hennin, Provisional reception expert
Published on 27 May 2026 Updated on 27 May 2026 8 min read

The court is the last resort. Long, expensive, sometimes unpredictable — but sometimes the only way. Here is what you need to know.

1. Which jurisdiction?

For construction disputes between a private buyer and a professional: business court (formerly commercial court). Territorial jurisdiction: site location or defendant’s registered office.

For amounts below 5,000 €, the justice of the peace has jurisdiction — simpler procedure, without mandatory lawyer.

2. The standard procedure

  1. Summons by bailiff writ (1,200 to 2,500 €).
  2. Introductory hearing: procedural calendar set.
  3. Judicial expertise: see our cluster judicial construction expertise.
  4. Conclusions: written exchange between lawyers (3 to 6 months).
  5. Pleadings hearing then judgment (3 to 6 months later).

3. The real cost

  • Judicial expertise: 3,000 to 12,000 €.
  • Lawyer (summons + conclusions + pleadings): 5,000 to 12,000 €.
  • Court registry and bailiff fees: 1,500 to 3,000 €.
  • Total: 9,500 to 27,000 €, excluding ancillary expertises.

If you win, these costs are largely recoverable from the defendant — but spread over time.

4. Before starting: the alternatives

Always first attempt mediation, judicial conciliator (free of charge), or amicable adversarial expertise. 60% of files are settled in this way.

Our defect expertise frames the technical file before proceedings — fewer lawyer hours, faster judicial expertise.

Construction court questions

Which jurisdiction is competent?
Business court of the place where the obligation arose (usually the building site), or of the defendant's registered office. Lawyer mandatory at first instance for amounts > 5,000 €.
How long before judgment?
2 to 4 years at first instance with judicial expertise. Add 1 to 2 years if appealed. The expertise phase is the longest.

Before court, secure your technical file

Our detailed report serves as a basis for the summons and the judicial expertise.