Flood risk assessment: Flood Zones 1, 2, 3 and 3b
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How to carry out a flood risk assessment so that you can complete your planning application
Adapted edition
- Document type
- Reference Guide
- Format
- DOCX
- Pages
- 12
- Language
- English
- Version
- 1.0
- Updated
- 2026-09-16
- Category
- Safety & operations
- Licence
- Open Government Licence v3.0
Description
How to carry out a flood risk assessment so that you can complete your planning application Consult the original guidance for current legal and operational details.
Contents
- Check if your development needs to satisfy the sequential and exception tests
- When the sequential test is needed
- When development is exempt from the sequential test
- How to apply the sequential test
- When the exception test is needed
- How to apply the exception test
- Check if you need any other permissions or consents
- What to include in the flood risk assessment
- Locations and site plans
- Survey of site and development levels
- Information on past floods
- Assess all sources of flood risk
- Address the flood risk
- Site layouts
- Floor levels
- Extra flood resistance and resilience measures
Source and licence
Environment Agency
AttributionEnvironment Agency, ‘Flood risk assessment: Flood Zones 1, 2, 3 and 3b’ (updated 28 May 2026), reused under the Open Government Licence v3.0.
ChangesNeutral text-only adaptation from the official GOV.UK Content API body: headings, paragraphs, ordered and unordered list items and clickable source-link destinations in an appendix preserved. Images, logos, page design, accessible-format request widgets and linked attachments excluded; normalised whitespace, invisible format marks and typography.
Version history
- v1.016/09/2026