How do you know if your development needs radon protection?

How do you know if your development needs radon protection? Did you know the maps have changed? (Contains public sector information licensed under the Open Government Licence v1.0)

To determine whether your site is in a radon affected area, you can consult the licenced radon potential data which will tell you which site-specific radon class the site is in.

However, the maps have recently been updated resulting in some areas needing radon protection which previously did not. It’s worth double checking whether your site has been affected by this change. However, you cannot tell the whole picture from the map alone.

Ensuring new buildings are adequately protected against radon is vital. The free to use indicative radon maps can tell you if your site is or isn’t in a radon affected area but this is not the full picture.

A 1 km grid square on the indicative map is based on the highest radon potential within that grid square. However, your site may fall into a lower Radon Class than indicated on the free to use map. A detailed geological report could demonstrate that the geology specific to your site, rather the typical geology of the 1km grid square, means that high level radon protection is not required.

You can have a look at the UK Health Security Agency interactive radon map here:

And if you’d like to know more, do get in touch!