Cluster info · Defects & construction flaws

Construction law attorney: when and why to consult

photo auteur
By Edouard Hennin, Provisional reception expert
Published on 27 May 2026 Updated on 27 May 2026 6 min read

The construction law attorney does not intervene at the same stage as a technical expert. They secure your rights, draft deeds and plead. But you must know when to engage them.

1. When to consult?

Three key moments:

  • Formal notice gone unanswered within 30 days — your contractor formal notice must be followed by a legal act.
  • Before judicial expertise — the attorney formulates the questions to the judge.
  • Bankruptcy or liquidation of your contractor or developer — urgent claim declaration.

2. Fees: what to know

In Belgium, two modes:

  • Hourly: €120 to €250 excl. VAT/hour depending on experience and bar.
  • Flat fee: possible for well-framed cases (€4,000 to €12,000 excl. VAT for a standard defects case).

Always demand a written fee agreement before the first step.

3. Less costly alternatives

Before going to court, consider construction mediation (€1,200 to €3,000), the conciliation magistrate (free), or amicable adversarial expertise. A good attorney will guide you to these routes if your case allows.

Our defects expertise service intervenes upstream: we produce the technical report that will be filed — which significantly reduces the necessary attorney hours.

Questions about construction attorneys

From what dispute amount to consult an attorney?
From €5,000 dispute, an attorney opinion is profitable. Below, first prefer mediation or conciliation.
Free legal aid possible in construction?
Yes, under income conditions. The Legal Aid Bureau of each bar can appoint a pro deo lawyer. Check on avocats.be.

Construction dispute: need expert opinion before the attorney?

Our technical expertise often serves as the basis for the judicial file — quote within 24 hours.