Natural Resources Wales’ latest flood risk maps can be viewed at Flood Map for Planning (naturalresources.wales) It accompanies a revised advice note, Technical advice note (TAN) 15: development, flooding and coastal erosion | GOV.WALES, that makes it clear that new developments of homes, the emergency services, schools, and hospitals, must not be located in areas of high flood risk without strong flood defences. If a local planning authority is minded to approve any scheme against this advice, ministers will be notified and able to decide the application directly.
The new flood map identifies four types of flood zone, with each zone having particular advice in TAN 15 for proposed developments. The zones are based on current risk levels with the addition of allowances for climate change. The map will be updated in May and November each year to reflect the latest modelling and data on flood risks. For all development in areas of low risk and areas protected by strong flood defences, and for less vulnerable developments in areas at high risk, securing planning permission will be dependent on passing acceptability tests set out in TAN15.