A federal field
A useful exception in a largely regionalised landscape. Inspection of electrical installations is federal.
The regulation applying to electrical installations is federal, meaning an installation meets the same requirements everywhere in Belgium.
Only certain peripheral aspects differ, notably those linked to network operators, without the technical requirements changing.
That uniformity contrasts with energy assessments or asbestos, entirely regional, as the other articles in this branch explain.
The general framework of competences is covered in the guide on building regulations. The division is set out there.
What triggers an inspection
Three main situations, two of which directly concern renovation. They trigger the inspection obligation.
The sale of a property, for installations within scope, the inspection having to be available for the deed.
Commissioning a new installation, before connection.
Any substantial modification or extension of an existing installation, which is precisely the case in most renovations.
That third point is often discovered late. A renovation touching the installation triggers an inspection, whose outcome may require works beyond the scope originally planned.
| Situation | Timing of the inspection | Frequency in renovation |
|---|---|---|
| Sale of a property | Inspection available for the deed | Outside the works |
| Commissioning a new installation | Before connection | Common |
| Substantial modification or extension | After works on the installation | The most frequent |
What an inspection may reveal
Four frequent findings on older installations. They recur in most reports.
Absent or inadequate earthing, on the oldest installations.
Protective devices not meeting current requirements, the rules having changed several times.
Undersized circuits for current use, notably in kitchens and plant rooms.
Successive undocumented alterations, which make circuit identification uncertain and complicate any intervention.
Not all those findings entail an immediate obligation, but they govern the feasibility and cost of what is planned.
Why electrics holds surprises
Three structural reasons, specific to this trade. They explain the cost of bringing an installation up to standard.
Routes are invisible and rarely documented. An installation drawing rarely exists for an older property, and successive alterations are not recorded.
Requirements change regularly. An installation compliant when built is not necessarily compliant against current rules, notably on protective devices.
The scope of inspection depends on what is touched, and limited work may have effects beyond the area concerned.
Add a recent development: the widespread arrival of photovoltaics, storage and charging points has tightened the rules, placing older installations further still from current requirements.
What to do before works
Four steps, in this order.
Gather the existing documents, previous inspection reports, diagrams and service invoices.
Check the validity of the last inspection, which is issued for a defined period.
Have the installation assessed against the brief, before pricing, to include any compliance work.
Include the completion inspection in the programme, its performance governing commissioning.
The status and limits of the bodies involved are covered in the guide on building regulations.
What this means for a professional
Four rules.
Raise the installation question at sketch stage, compliance work discovered late unbalancing the budget.
Check what the brief actually touches, the triggering of an inspection depending on the extent of modification.
Do not assume a compliant installation stays compliant, the requirements having changed.
Include the final inspection in the programme, rather than treating it as a last-minute formality.
This article reflects the position of the rules at the date of checking and serves professional orientation. It does not replace technical advice or consultation of the applicable texts.