Do You Need a Permit for a Radon Mitigation System? in Netherlands
Sometimes. Many US states and European countries require contractor licensing for radon mitigation, and some jurisdictions require permits for sub-slab depressurization systems that penetrate the building envelope. The work involves drilling through foundation slabs, installing PVC piping, and wiring an exhaust fan — any of which may independently trigger building or electrical permits. In areas with high radon concentrations, post-installation testing is often mandatory.
Do you need a permit?
Rarely required
- Permitting authority
- Gemeente (Omgevingsloket) + RIVM
- Typical fee
- €0–€300
What triggers a permit
- Penetration through the foundation slab for sub-slab depressurization piping
- Penetration through the roof or exterior wall for exhaust vent piping
- New dedicated electrical circuit for the radon fan (typically 110V/15A)
- State or local requirement for a licensed radon mitigation contractor
- Post-installation radon testing required by local health department
Country-specific detail
In the Netherlands, radon levels are generally low due to geological conditions, and dedicated radon mitigation regulations are limited. Installing a radonreductiesysteem (radon mitigation system) involving a doorvoer (penetration) through the fundering (foundation) or dak (roof) may require a omgevingsvergunning if the work modifies the constructie of the woning. However, simple sub-slab ventilation systems that do not alter the structural integrity are often vergunningsvrij. The RIVM (Rijksinstituut voor Volksgezondheid en Milieu) provides guidance on radon levels and recommends a referentieniveau (reference level) of 100 Bq/m³ per EU Directive 2013/59/Euratom. Electrical work for the ventilator must comply with NEN 1010. In Limburg and parts of Noord-Brabant where radon levels are higher, the gemeente may have additional voorschriften (regulations).