The six fields
| Field | What it covers |
|---|---|
| Spatial planning | land use, permits, massing, siting |
| Energy performance | requirements for new and existing stock, certification |
| Housing | habitability standards, health, obligations on the stock |
| Heritage | protection, restoration, constraints on listed fabric |
| Environment | environmental permit, waste, soil, nuisance |
| Sector rules | requirements specific to certain establishments |
Each of those fields has produced three bodies of rules, with their own vocabularies, thresholds and timetables.
Spatial planning
This is the most structuring field, and the one most sharply distinguishing the three regions. It concerns energy performance.
Each region has its own code, with its own procedures, consent periods and lists of exempt works. Periods vary threefold, and the same project may be exempt on one side of the language border and require consent on the other.
The detail, including compared periods and their effect on carrying cost, sits in the guide on construction costs per m². The thresholds are given region by region there.
This guide does not repeat it, to avoid duplication: it addresses competence, the other addresses cost.
Energy performance
A fully regionalised field, including in its vocabulary. It concerns accessibility.
The three regions transposed the same European framework with distinct indicators, thresholds and timetables. Even the acronyms differ, without the calculation methods coinciding.
A requirement met in one region therefore does not translate mechanically into another.
The detail of applicable requirements and their cost effect sits in the dedicated article of the guide on construction costs per m². The triggers are compared there.
Housing
A field whose technical effects are often understated. It concerns housing quality.
The regions set the standards applying to dwellings: minimum areas, clear heights, natural light, ventilation, sanitary condition. Those standards constrain the plan from the outset.
Those standards can block a project more surely than massing. Subdividing a dwelling may be unachievable not because the volume is insufficient but because habitability standards are not met.
Obligations attaching to existing stock are added, notably renovation duties after acquisition, which are also regional. Their calendar is set at regional level.
Sector fire rules
This is the point that surprises most, and it deserves stating clearly. Fire safety is not entirely federal.
Fire safety is federal for the basic standards, but sector rules are regional. Hotels, care homes, nurseries, schools and premises open to the public fall under decrees specific to each region.
The same establishment therefore obeys both levels simultaneously. The basic standards set the common base, sector rules add requirements tied to use and to the public received.
This point is developed in the article on sector rules by region. The layers are set out there.
Accessibility and environment
Two regionalised fields whose trigger thresholds differ. They concern the environment and heritage.
Accessibility is subject to regional requirements, with thresholds tied to the nature and size of the building. It is covered in the dedicated article.
Environment covers the environmental permit, management of soil and site waste, and ground constraints. In Flanders planning and environment are merged into a single consent, which is not the case elsewhere.
What this imposes on a professional
Four rules.
Name the region before any search. No regional requirement can be stated without it.
Do not transpose reasoning between regions, even where notions carry similar names.
Check both levels for fire safety, federal for basic standards, regional for sector rules.
Check housing standards before massing on any subdivision or conversion project.
This article reflects the division of competences at the date of checking and serves professional orientation. It does not constitute legal advice and does not replace consulting the regional texts.