Do You Need a Permit for a Radon Mitigation System?
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?
Sometimes
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-by-country detail
Verenigde Staten
Sometimes
- Permitting authority
- State radon program + local building department
- Typical fee
- $0–$300
In the US, radon mitigation permit requirements vary significantly by state. Some states (such as Illinois, New Jersey, and Ohio) require both contractor licensing through a state radon program and a building or mechanical permit for the installation. Others treat sub-slab depressurization as routine mechanical work that does not require a separate permit, though the electrical circuit for the fan may still need an electrical permit. The EPA recommends following ASTM E2121 (Standard Practice for Installing Radon Mitigation Systems) and the AARST-ANSI RMS-MF standards. Post-mitigation testing to verify radon levels below 4 pCi/L is standard practice and required in some states. Many states maintain a registry of certified radon mitigators.
Polen
Sometimes
- Permitting authority
- Państwowa Agencja Atomistyki (PAA) + Powiatowy Inspektor Sanitarny
- Typical fee
- PLN 0–1,000
In Poland, radon mitigation is regulated under general building and health safety law rather than a dedicated radon statute. Installing a system redukcji radonu (radon mitigation system) that involves wiercenie w płycie fundamentowej (drilling through the foundation slab) and instalacja wentylacji mechanicznej (mechanical ventilation installation) may require a zgłoszenie to the Starostwo Powiatowe under the Prawo budowlane. The Państwowa Agencja Atomistyki (PAA) monitors radon levels nationally and sets reference levels per the EU BSS Directive (2013/59/Euratom, transposed as the Prawo atomowe amendments). In areas designated as strefy podwyższonego stężenia radonu (elevated radon zones, especially Dolny Śląsk, Małopolska, and Podkarpacie), the Powiatowy Inspektor Sanitarny may require pomiary stężenia radonu (radon concentration measurements) post-installation.
Nederland
Rarely required
- Permitting authority
- Gemeente (Omgevingsloket) + RIVM
- Typical fee
- €0–€300
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).
Spanje
Sometimes
- Permitting authority
- Consejo de Seguridad Nuclear (CSN)
- Typical fee
- €100–€500
In Spain, radon mitigation is regulated under the Código Técnico de la Edificación (CTE), which was updated to include Documento Básico HS6 (Protección frente al radón) following the EU BSS Directive transposition. The CTE HS6 applies primarily to new construction and major renovations in municipios classified as zona de actuación prioritaria (priority action zones) by the Consejo de Seguridad Nuclear (CSN). Retrofitting an existing vivienda with a sistema de mitigación de radón involving perforación de la solera (slab drilling) typically requires a declaración responsable or licencia de obra menor from the Ayuntamiento. The CSN publishes a mapa de zonas de radón that identifies affected areas (mainly Galicia, western Castilla y León, Extremadura, and parts of Madrid). Instalaciones eléctricas for the extractor fan require an updated Boletín Eléctrico (CIE).