Specialized Guides

Radon Regulation Insights

Q: How can I know if my area is at risk?

Regions identify 'Priority Areas' where it is estimated that exceeding limits affects more than 15% of buildings. You can consult radon mappings on regional ARPA websites or on the National Radon Plan.

D.Lgs 101/2020 imposes different obligations depending on the sector and building type. Discover dedicated guides for employers, school principals, construction professionals, and property owners.

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Regional Regulations

Updated January 20, 2026

Guides by Sector and Category

Select the insight most suitable for your situation.

Workplaces

Obligations for Employers: underground, semi-underground premises and ground floors in Priority Areas. Penal sanctions and procedures.

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Schools and Institutes

Guide for School Principals and Public Entities: protection of children, monitoring obligations, and liability.

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Basement Recovery

Transforming cellars into habitable spaces: regional regulations, habitability requirements, and technical solutions.

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Remediation Expert

Who they are, what they do, and when they are mandatory: training, remediation techniques, and liability.

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The Radon Remediation Expert

The key professional figure for remediation

Learn more about the Expert

Who is the Expert?

The Radon Remediation Expert is a technical professional (engineer, architect, surveyor) registered with their order or college who has attended a qualifying course of 60 hours recognized by the Ministry. This figure was introduced by D.Lgs 101/2020 to guarantee effective and certified remediation interventions.

When is it mandatory?

It is mandatory to appoint an Expert when the annual average radon concentration exceeds 300 Bq/m³. In this case, the employer must entrust the Expert with the design of corrective measures, which must be implemented within 24 months and verified with new measurements.

What do they do concretely?

The Expert performs a technical inspection, analyzes radon entry routes (cracks, joints, penetrations), designs the most suitable solution (depressurization, crawl space, ventilation), and supervises the works. Upon completion, they draft a technical report certifying the effectiveness of the intervention.

Official Resources and Useful Links

Authoritative sources to learn more about radon regulations.

D.Lgs 101/2020

Full text on Official Gazette

National Radon Plan

PNAR 2023-2032 on MASE website

Directive 2013/59/Euratom

Official text on EUR-Lex

Frequently Asked Questions on Topics

Who is obliged to measure radon according to D.Lgs 101/2020?

The obligation applies to all employers with underground or semi-underground premises. In Priority Areas (defined by Regions), the obligation extends to ground floors. Schools have specific obligations regardless of the location of the premises.

What is the Radon Remediation Expert?

It is a qualified professional (engineer, architect, surveyor) who has attended a recognized 60-hour course. They are mandatorily appointed when concentrations exceed 300 Bq/m³ to design effective remediation interventions.

Does basement recovery require radon measurement?

Yes, it is mandatory. Regional laws on housing recovery (e.g., L.R. 7/2017 Lombardia) make habitability subject to verification of radon concentrations, which must be lower than 200 Bq/m³ for new residential destinations.

What are the sanctions for missing measurement?

Art. 238 of D.Lgs 101/2020 provides for arrest from 1 to 6 months or fines from €2,000 to €15,000 for failure to assess. Sanctions double if no action is taken after exceeding limits.

Do schools have specific obligations for radon?

Yes, schools of all levels are considered workplaces and are subject to measurement obligations. Children are particularly vulnerable to prolonged exposure, so school principals must guarantee monitoring.

How much does a certified radon measurement cost?

The cost varies based on the number of measurement points and building type. For a small commercial premise it can start from a few hundred euros, while strictly large school or industrial buildings require a personalized quote including installation, collection, and analysis.

How can I know if my area is at risk?

Regions identify "Priority Areas" where it is estimated that exceeding limits affects more than 15% of buildings. You can consult radon mappings on regional ARPA websites or on the National Radon Plan.

Is radon dangerous only on lower floors?

Although higher concentrations are usually found in basements and ground floors, radon can rise to upper floors through the stack effect, elevators, and utility shafts. Therefore, measurement is recommended even on upper floors if there are strong suspicions.

What happens if I sell a house with high radon?

There is no ban on sale, but the obligation of information applies. Concealing a known radon problem can constitute a hidden defect of the property, exposing the seller to claims for compensation or contract cancellation.

How often should measurement be repeated?

If values are below limits, measurement must be repeated every 8 years. However, if structural or energy efficiency works (e.g., thermal coat, new windows) are carried out that reduce air exchange, measurement must be repeated immediately.

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Need a personalized guide?

Our experts can help you understand which obligations apply to your specific situation: company, school, condominium, or building project.