A report will tell you the estimated probability above the Action Level.Order a report
Find out the yearly average radon level for a property and if it is above or below the Action Level.Order a domestic pack Order a workplace pack
Find helpful and informative answers to your questions.
Radon is a colourless, odourless radioactive gas formed by the radioactive decay of the small amounts of uranium that occur naturally in all rocks and soils.
The issue of radon comes up when buying and selling properties. Anyone can find out if a property is in a radon Affected Area by completing an online search. The search will tell you the chance of that property having a high radon level.
If you are buying or selling in a radon Affected Area, you may want to consider the following points:
When required by building regulations and associated guidance, new build properties in radon Affected Areas are expected to have radon protective measures installed when they are built.
The guidance recommends specific protective measures depending on the construction of the building and whether 'Full' or 'Basic' radon protection should be provided.
You can find out whether you should have full or basic protection by asking your builder or by doing a radon search. The radon search will state whether the radon protection expected is 'basic' or 'full'.
The picture shows an example of a typical capped off sump exit pipe.
PHE recommends that you should do a 3 month radon test in your new home during the first year of occupation as it is not guaranteed that your radon level will be less than the Action Level.
If the radon test result is higher than the Action Level and you have full protection built in, the additional measures can be used to reduce radon levels further.
If only basic protection is fitted a radon sump of underfloor ventilation can be fitted - see our guidance on how to reduce radon levels in existing properties.
Once you have made these changes - test again to ensure that the radon levels are reduced sufficiently.
It is not advisable to test an unoccupied property. If there is a period of three months when it will be occupied, this may provide an opportunity to complete a measurement. It is more important to find out if your permanent residence is within an Affected Area and, if so, test it.
Radon is one of the hazards specified in the Housing Health and Safety Rating System Regulations. For properties in radon Affected Areas a hazard assessment is required. Contact the local council for details.
If you plan to significantly upgrade and/or extend a property in a radon Affected Area, you should seek professional advice. The Building Control or Environmental Health Departments of the local council should be able to help.