Cluster info · Defects & construction flaws

Claim against a property developer in Belgium

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By Edouard Hennin, Provisional reception expert
Published on 27 May 2026 Updated on 27 May 2026 7 min read

Claims against a property developer are more powerful than against a simple contractor thanks to the Breyne Law. Provided you know them.

1. The specific protections under the Breyne Law

If your contract is governed by the Breyne Law (off-plan purchase, turnkey):

  • Article 7: mandatory provisions, otherwise nullity.
  • Article 9: two-stage reception regime.
  • Article 12: surety 5% and completion guarantee.

If one of these is missing, you can request the nullity of the contract — invokable even years later.

2. The completion guarantee

This is the main protection against bankruptcy. A bank or insurance company undertakes to finance the completion of the works if the developer defaults. The mechanism is triggered as soon as the bankruptcy is published in the Belgian Official Gazette.

Without this certificate before signing the authentic deed, refuse categorically — see our cluster Breyne Law surety.

3. The classic claims

In case of defects or delays:

Our Breyne Law assistance audits contract and certificates — often decisive before signing.

Developer claim questions

My developer goes bankrupt, what protections?
Under the Breyne Law: completion guarantee (article 12) — a bank or insurer takes over to finish the build. Verify your certificate before signing.
The developer refuses the reservations in the minutes, what to do?
Note your reservations unilaterally with photos and sign 'under reservation'. Registered mail within 8 days to formalise. See what to do.

Developer dispute? Urgent Breyne Law audit

We check your contract and identify all available claims within 48 working hours.