Cluster info · Breyne Law

Turnkey contract and Breyne Law: what to check

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

The turnkey contract is the archetype of the contract subject to the Breyne Law of 9 July 1971 (Belgian Official Gazette). But its standard clauses often hide pitfalls — decoded.

1. When is the contract subject?

As soon as a contractor undertakes to build a complete home on your land, with a fixed price and a contractual deadline, you are under the Breyne Law. All protections apply: security deposit, completion guarantee, two-step reception.

2. Clauses to verify

Article 7 imposes 12 mandatory clauses. Specific to turnkey:

  • Architectural plans signed and dated annexed.
  • Detailed technical specifications (materials, brands, performance).
  • Firm execution deadline with daily costed penalties.
  • Payment terms by instalments according to progress (see down payments).

3. Classic trap clauses

  • Abusive price revision (excessive indexation) → see price revision.
  • Capped penalties (max 5% of the price) reducing the incentive to meet the deadline.
  • Warranty exclusions for finishes, paint, sealing → void if abusive.
  • Automatic provisional reception without contradictory observation → contrary to Article 9.

Compare with our cluster Breyne Law sale contract for the VEFA case.

Our Breyne Law advisory re-reads, negotiates and secures your contract before signing.

Turnkey questions

Difference turnkey vs VEFA?
Turnkey = construction by contractor on the buyer's land. VEFA = purchase from a developer of a property to be built (land + building). Both fall under the Breyne Law.
Can standard contract clauses be negotiated?
Yes. No clause is unalterable. Any negotiation to your advantage must be recorded by signed amendment.

Turnkey contract audit?

Our lawyers check every clause and flag traps before signing.