dataset · England
Flood Map for Planning – Surface Water Spatial Planning Extents – Present Day
The Flood Map for Planning Service includes several layers of information. This includes Surface Water Spatial Planning Extents. These datasets show the extent of land at risk of flooding from surface water to a defined annual exceedance probability (AEP) or chance of flooding each year. These datasets include the following scenarios: ● 0.1% AEP (1 in 1000) ● 1% AEP (1 in 100) ● 3.3% AEP (1 in 30). Please note, the 0.1% and 1% AEPs are presented within a single layer - there is attribution withi
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Licence: ["There are no public access constraints to this data. Use of this data is subject to the licence identified.", "There are no public access constraints to this data. Use of this data is subject to the
Evidence quality: 64.7
Listed in data.gov.uk public catalogue API on 2026-10-16; relevance/value screened (haiku).
Metadata checked: 2026-10-14T13:20:00.000Z
What's in it
- Data offered docs-verified
- surface water flood extent 0.1% AEP (1 in 1000) · surface water flood extent 1% AEP (1 in 100) · surface water flood extent 3.3% AEP (1 in 30)
- Coverage llm-inferred
- England
- Update frequency docs-verified
- quarterly
- Formats docs-verified
- WMS · lyrx · PDF
- Access docs-verified
- Open access, no authentication; Open Government Licence v3.0
Useful for
- Use cases llm-inferred
- Screening-level surface water flood extent for a development site in an FRA · Identifying surface water flood-risk areas at 1 in 30, 1 in 100 and 1 in 1000 for drainage strategy and site layout · Planning-stage flood risk constraints mapping for a site search area
- Audience llm-inferred
- flood consultants · drainage engineers · planners · GIS analysts
Limitations
- Constraints docs-verified
- Indicative only: not suitable for showing whether an individual property is at risk of flooding · 0.1% and 1% AEP extents share a single layer; differentiation relies on attribution within the data · Present-day scenario only, per the dataset title · Users must check suitability for their intended use
Evidence
- https://environment.data.gov.uk/api/file/download?fileDataSetId=5a0b361e-a9d9-4eee-8d72-90fed7fb195f&fileName=Surface Water Spatial Planning Product Description.pdf
- https://www.data.gov.uk/dataset/dfd734fb-cc68-4229-b60d-8c0280398052/flood-map-for-planning-surface-water-spatial-planning-extents-present-day
Check upstream coverage, uncertainty and licence before use. Station observations are not forecasts or design levels.