Homeowners, small builders and agents in England
Free check: does your planning application need a flood risk assessment? Flood zone lookup, standing advice for extensions and the floor level rules.
ePlan fills in
How it works
What you get
The check is free. The paperwork after it is drafted at the SuDS Statement for Small Schemes in England door.
Modeled on: Environment Agency: Preparing a flood risk assessment, standing advice
From public data
of floor space is the most an extension can add and still count as a minor extension under the Environment Agency's standing advice
Source: Preparing a flood risk assessment: standing advice, gov.uk
Draft the sustainable drainage (SuDS) statement councils ask for: runoff destination, the first 5 mm of rain, maintenance. Free to read, pay to download.
Questions
National policy requires a site-specific flood risk assessment for all development in Flood Zones 2 and 3, and in some other cases. Check your site's zone on the Environment Agency's flood map for planning.
The standing advice recommends floor levels at least 600 mm above the estimated flood level, possibly 300 mm if that level is known with high certainty. If you can't raise the floor, add flood resistance and resilience measures to at least 600 mm above it.
Sometimes. You may be able to get the estimated flood level from the flood map for planning; if not, you need a flood risk specialist to calculate it. Levels must be stated against Ordnance Datum, from Ordnance Survey or a qualified surveyor's land survey.
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Answer it and ePlan opens the SuDS Statement for Small Schemes in England door with your answer filled in.