Check Radon Gas Levels by Postcode
Free radon gas check — find out if your home is in a high-risk area using BGS geological data
Check Your Area
Enter your postcode above to see your risk level
I Have a Result
Enter your Bq/m³ reading for a personalised action plan
Buying a Home
What to ask your surveyor and what to budget for
How it works
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What is radon?
Radon is a naturally occurring radioactive gas — the second leading cause of lung cancer in the UK, responsible for around 1,100 deaths each year. It's invisible and odourless; the only way to know your home's level is to test.
Radon seeps from uranium in the ground, through cracks in foundations, and accumulates indoors. Concentrations vary hugely depending on local geology — some postcodes have 30x the national average.
Learn about radon and health →How radon enters your home
Is your home at risk? Get a free radon risk checklist
We'll send you a concise PDF covering what to check, how to test, and when to act.
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