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Flood Risk Assessments

En-Plan are able to advise you on a range of building and design projects, no matter the scale of the project you proposing. The design process can be both complex and time consuming, we are here to help you through this.

We support your planning application

If your planning application has been rejected on any flood risk ground, we’re here to help you. The revised National Planning Policy Framework was published on 24 July 2018 and sets out the government’s planning policies for England. The NPPF sets out planning and policies related to development planning and flood risk using a sequential characterisation of risk based on planning zones and the Environment Agency’s Flood Maps. The aim of the flood risk assessment is to identify which Flood Zones the site is located in and vulnerability classification relevant to the proposed development, based on an assessment of current and future conditions.

All forms of flooding and their impact on the natural and built environment are material planning considerations. NPPF requires flood risk to be taken into account at all stages of the planning process to avoid inappropriate development. This should take account of:

– the nature of flood risk;
– the spatial distribution of flood risk;
– climate change impacts; and
– the degree of vulnerability of different types of development.

Flood Risk From River Thames London

Flooding is one of the greatest risks to London in the 21st century. 1.5 million people live in the floodplain of the River Thames and its tributaries. Many more people work, visit or travel through these potentially vulnerable areas. The high density of the urban London means there is a rapid response to rainfall within drainage system. Lots of impermaeble surface cover in London (such as roads and buildings) means that rainfall runoff from the land into the drainage systems and rivers is rapid creating a fast build up of water and potentially fluvial and surface water flooding. We have a great expertise in carrying out Flood Risk Assessment of the private and commercial projects within the River Thames catchment.

Sequential Test, Exception Test

The Sequential Test ensures that a sequential approach is followed to steer new development to areas with the lowest probability of flooding. The aim is to steer new development to Flood Zone 1 (areas with a low probability of river or sea flooding). Where there are no reasonably available sites in Flood Zone 1, local planning authorities in their decision making should take into account the flood risk vulnerability of land uses and consider reasonably available sites in Flood Zone 2 (areas with a medium probability of river or sea flooding), applying the Exception Test if required. Only where there are no reasonably available sites in Flood Zones 1 or 2 , developments are permitted in Flood Zone 3 (areas with a high probability of river or sea flooding), taking into account the flood risk vulnerability of land uses and applying the Exception Test if required.

Please CONTACT US for a free no obligation consultation or email me on simon@en-plan.co.uk. I look forward to talking through any proposals you may have.