General Flood Risk Assessment Information for Planning Applications
You will need a flood risk assessment (FRA), or flood consequences assessment (FCA) in Wales, for most developments.
In England this includes developments;
● in flood zone 2 or 3 including minor development and change of use
● more than 1 hectare (ha) in flood zone 1
● less than 1 ha in flood zone 1, including a change of use in development type to a more vulnerable class (for example from commercial to residential), where they could be affected by sources of flooding other than rivers and the sea (for example surface water drains, reservoirs)
● in an area within flood zone 1 which has critical drainage problems as notified by the Environment Agency
You don’t need to do a flood risk assessment for a development that’s less than 1 ha in flood zone 1 unless it could be affected by sources of flooding other than rivers and the sea, for example surface water drains.
For developments in England the following link provides more information;
In Wales it is often necessary to prepare a flood consequences assessment (FCA), to show how the flood risk to your development, or any increased flood risk elsewhere as a result of your development can be suitably managed or mitigated.
For developments in Wales the following link provides more information;
In Scotland, flood risk assessments are required for development in the medium to high category of flood risk, and may be required in the low to medium category in the circumstances described in the framework (refer to link below), or where other factors indicate heightened risk. FRA will generally be required for applications within areas identified at high or medium likelihood of flooding/flood risk in SEPA’s flood maps.
For developments in Scotland the following link provides more information;