HouseCheckup checks radon risk for any UK postcode using Public Health England (PHE) indicative radon data. Radon is a radioactive gas that causes over 1,000 lung cancer deaths per year in the UK, and approximately 2 million homes are in radon-affected areas. Our free check shows your postcode's radon risk level. The £14.99 Complete report includes full radon assessment with remediation guidance.
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This free tool checks one data point. The HouseCheckup Complete report combines 70+ data sources into an 18-page report with a composite IQ Score (0–100) — covering flood, EPC, crime, schools, transport, ground stability, investment potential, and more.
Radon is a naturally occurring radioactive gas produced by the decay of uranium in rocks and soil. It's colourless and odourless. The UK Health Security Agency states that radon causes over 1,000 lung cancer deaths per year in the UK. The Action Level is 200 Bq/m³ — above this, remediation is recommended.
The highest radon levels in England and Wales are found in Cornwall, Devon, Somerset, Northamptonshire, and parts of Derbyshire and the Peak District. However, radon can vary significantly even within a postcode. HouseCheckup uses PHE indicative data to show the estimated percentage of homes above the Action Level in your area.
Mortgage lenders may require a radon survey for properties in high-risk areas. Remediation (typically a radon sump system) costs £800–1,500. HouseCheckup flags radon risk in the IQ Score and Complete report so you can factor this into your offer and budget.