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Structural & Technical Inspection6 min readUpdated: 2026-03-12

Non-Compliant Electrical Installation at Purchase: What Are Your Legal Duties?

What happens if the electrical compliance report is negative? Key rules regarding the statutory 18-month remediation deadline, wiring schematics, and RGIE/AREI Book 1 rules.

Statutory basis: General Regulations on Electrical Installations (RGIE/AREI Book 1, Art. 271bis)

Key Takeaways for Property Buyers

  • Upon the sale of a property with an electrical installation dating before October 1, 1981, an official inspection certificate is mandatory.
  • Over 80% of older Belgian homes receive a non-compliant inspection report with noted infractions.
  • As a buyer, you have a statutory period of 18 months from the authentic deed to remedy all violations and pass a follow-up inspection.
  • Missing single-line and layout diagrams, absence of earthing, and missing 30mA residual current devices are the most prevalent infractions.

1. The Obligation to Provide the Electrical Inspection Certificate

The seller must arrange a compliance survey through an accredited inspection body (such as BTV, Vinçotte, or OCB). The resulting report may be positive (compliant) or negative (non-compliant).

A negative certificate does not block the conveyance. The notary records in the authentic deed that the purchaser is fully informed of the infractions and formally undertakes to bring the installation into compliance within the statutory deadline.

Statutory Remediation Deadline: 18 or 12 Months?

For older installations installed before October 1, 1981, the legal deadline is 18 months from the date of the notarial deed. For post-1981 installations that fail inspection, a stricter 12-month deadline applies from the survey date.

2. Typical Costs to Bring an Older System into Compliance

The remediation cost varies significantly with the severity of infractions. If violations are limited to missing schematics and grounding a few wall sockets, costs often remain within €800 to €1,500.

If the entire consumer distribution board must be renewed and an earthing loop is missing (requiring earth electrodes driven into the subsoil), budget between €3,000 and €6,000 for a standard house.

Frequently Asked Questions

What happens if I fail to complete the re-inspection within 18 months?

The inspection agency is legally bound to report uninspected dossiers to the Federal Ministry of Economy (DG Energy). Furthermore, in the event of an electrical fire, your building insurer may deny coverage or seek recourse.

May I draw the required electrical wiring schematics myself?

Yes. If you possess the requisite technical knowledge, you may draft the single-line diagram and location plan yourself prior to the official re-inspection.

Relevant documents to request for this subject

RGIE/AREI Electrical CertificateSingle-line Wiring DiagramFloorplan Layout Schematic

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