Flood risk assessment for building alterations or extensions

Generally, applications to extend or alter individual buildings are unlikely to increase flood risk elsewhere and therefore consultation with Rivers Agency is largely unnecessary. However it is still the responsibility of the developer/applicant to construct in a manner that minimises the flood risk to the development. The need to consult Rivers Agency may still arise in a number of circumstances, for example: where a proposal impacts upon a watercourse or flood defence structure; a change of use of the building that will result in significant intensification of use; or where the location or design of the development has implications for the safe evacuation of people in a flood.