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Get the latest government advice about coronavirus. Advice for local residents and businesses can be found on our coronavirus information page.

Flood risk assessment

Flood risk assessments might be required if your project will take place in Flood Zone 1, 2 or 3 (including Zone 3b). Check our Strategic Flood Risk Assessment maps to find out if this is the case. 

If your project takes place in Zone 1, a flood risk assessment is required if either:

  • the area has critical drainage problems
  • the area is affected by surface water flooding
  • the project site will be more than 1 hectare
  • the project will introduce new uses to the land which are more vulnerable to flooding than the old uses

All project in Zones 2 or 3 (including Zone 3b) require a flood risk assessment.

Read more information in:

  • our Local Plan: Strategy and Sites 2019 (Policy P4) 
  • the National Planning Policy Framework 2019 (paras 155 - 165)
  • the National Planning Policy Guidance for Flood Risk and Coastal Change (ID.7 paras 001 - 008)

Visit the Government's page for flood risk assessment standing advice.