What radon mitigation paperwork should sellers keep?

Radon is a health and value question

Radon is a naturally occurring gas. Where concentrations are reduced with a remediation system, buyers want proof it was designed and checked correctly.

Keep

Initial testing: report showing pre-works levels and method.

Design and installation: quotes, method statement, and installer completion.

Post-remediation verification: test results after commissioning.

Maintenance: if fans or alarms need periodic checks.

Store fan locations and electrical spur references.

Using Property Passport UK

Start from the address on [Property Search](/search). When you own or manage the home, [claim your Property Passport](/claim/start) and upload Documents with clear dates and sources. Browse more explainers in the [Property Guides library](/guides). This article is general information, not legal, tax, mortgage, or survey advice.