Basingstoke and Deane Flood Risk
In Basingstoke and Deane, 1,061 of 95,534 properties (1.1%) are in areas at high or medium risk of flooding from rivers and the sea — at least a 1 in 100 chance in any year — per Environment Agency data updated 6 July 2026; that ranks 171st of 296 local authorities in England by number.
By bandProperties in Basingstoke and Deane by flood-risk band
| Risk band | Chance of flooding each year | All properties | Homes |
|---|---|---|---|
| High | 3.3% (1 in 30) or greater chance in any year | 884 | 629 |
| Medium | between 1% and 3.3% (1 in 100 to 1 in 30) chance in any year | 177 | 145 |
| Low | between 0.1% and 1% (1 in 1,000 to 1 in 100) chance in any year | 944 | 792 |
| Very low | less than 0.1% (1 in 1,000) chance in any year | 0 | 0 |
774 of the high- or medium-risk properties are homes and 209 are non-residential. 136 postcodes in Basingstoke and Deane have at least one property at high or medium risk.
Postcode districtsFlood risk across Basingstoke and Deane
Counts are for the part of each district inside Basingstoke and Deane.
Recorded floodsPast floods mapped in Basingstoke and Deane
The Environment Agency has mapped flood outlines on 15 dates in postcode districts that mostly lie in Basingstoke and Deane since 1947; the most recent started on 28 Feb 2014.
1940s 1 1970s 2 1990s 5 2000s 3 2010s 4
| Started | Place / name in the record | Source of flooding | Cause | Districts |
|---|---|---|---|---|
| 28 Feb 2014 | River Test Photography | Other | Groundwater/high water table | RG28 |
| 20 Feb 2014 | Barton Stacey | Ordinary watercourse | Groundwater/high water table | RG28 |
| 15 Feb 2014 | Oxford Road, Sutton Scotney | Main river | Groundwater/high water table | RG28 |
| 5 Feb 2014 | East Aston | Main river | Groundwater/high water table | RG28 |
| 23 Dec 2002 – 12 Jan 2003 | — 4 outlines | Drainage, main river | Channel capacity exceeded (no raised defences) | RG26 |
| 1 Dec 2002 – 1 Mar 2003 | Bourne Rivulet 55 outlines | Ephemeral watercourse | Groundwater/high water table | RG28 |
| 1 Dec 2000 – 1 May 2001 | Bourne Rivulet St Mary Bourne 20 outlines | Main river, ephemeral watercourse | Groundwater/high water table | RG25 RG28 |
| 28 Feb 1995 – 20 Mar 1995 | Upper Test Deane 2 outlines | Ephemeral watercourse | Groundwater/high water table | RG25 |
| 2 Feb 1995 – 1 Mar 1995 | Bourne Rivulet St Mary Bourne 2 outlines | Ephemeral watercourse | Groundwater/high water table | RG28 |
| 1 Feb 1995 – 1 Mar 1995 | River Dever Barton Stacey | Ephemeral watercourse | Groundwater/high water table | RG28 |
| 1 Jan 1995 – 1 Apr 1995 | Upper Test 183 outlines | Ephemeral watercourse | Groundwater/high water table | RG20 RG23 RG25 RG28 |
| 1 Jan 1992 – 12 Dec 1992 | — 14 outlines | Main river | Channel capacity exceeded (no raised defences) | RG20 RG26 |
| 1 Jan 1979 – 12 Dec 1979 | — 166 outlines | Main river | Channel capacity exceeded (no raised defences) | RG20 |
| 1 Jan 1971 – 12 Dec 1971 | — 3 outlines | Main river | Channel capacity exceeded (no raised defences) | RG20 |
| 1 Jan 1947 – 30 Dec 1947 | — 7 outlines | Main river, ordinary watercourse | Channel capacity exceeded (no raised defences) | RG24 RG26 |
What this page shows, and what it misses
The Environment Agency's count of properties in each postcode that sit in areas of land at very low, low, medium or high risk of flooding from rivers and the sea, allowing for flood defences and their condition, added up here by postcode district and local authority. Every property in England is counted once, so the share is of all properties in the area.
It misses: surface water (heavy rain), groundwater, sewer and reservoir flooding; Wales, Scotland and Northern Ireland; and anything about a single building. A band describes the land a property stands on, not its floor level or flood protection, so it is not a forecast for any one home. Past floods come from the EA's Recorded Flood Outlines and are placed in the postcode district whose centre is nearest (within 12 km), so a flood near a boundary can be listed under a neighbour. Older records are patchy, and a flood with no outline is not listed.
"Basingstoke and Deane" means the local authority area (ONS code E07000084), not only the town centre.
If you live in Basingstoke and Deane
- Check your own address on gov.uk; it also covers surface water.
- Sign up for free flood warnings: gov.uk/get-flood-warnings. Floodline: 0345 988 1188.
- What is in force now: flood warnings UK · river levels.
- Never walk or drive through flood water: why shallow water kills.
FAQQuestions people ask
Is Basingstoke and Deane at risk of flooding?
In Basingstoke and Deane, 1,061 of 95,534 properties (1.1%) are in areas at high or medium risk of flooding from rivers and the sea — at least a 1 in 100 chance in any year — per Environment Agency data updated 6 July 2026; that ranks 171st of 296 local authorities in England by number.
Which parts of Basingstoke and Deane have the most properties at flood risk?
Postcode district RG21 has the most: 567 properties at high or medium risk (3.5% of its properties in Basingstoke and Deane). The table on this page lists every district.
When did Basingstoke and Deane last flood?
The Environment Agency has mapped flood outlines on 15 dates in postcode districts that mostly lie in Basingstoke and Deane since 1947; the most recent started on 28 Feb 2014.
Does this include surface water flooding?
No. These counts cover flooding from rivers and the sea only. Surface water (heavy rain) flooding affects more properties in England; check it for one address on gov.uk's long-term flood risk service.
Flood risk counts: Environment Agency, Risk of Flooding from Rivers and Sea – Postcodes in Areas at Risk and Recorded Flood Outlines, used under the Open Government Licence v3.0. © Environment Agency copyright and/or database right 2025. All rights reserved. Some features of this information are based on digital spatial data from the Centre for Ecology & Hydrology, © NERC (CEH). © Crown Copyright and Database Rights 2025 OS AC0000807064. This product is produced in part from PAF® and Multiple Residence Data, the copyright in which is owned by Royal Mail Group Limited and/or Royal Mail Group plc. All rights reserved. Licence number AC0000807064.
Local authority of each postcode: Office for National Statistics postcode lookup (May 2026), licensed under the Open Government Licence v3.0. Contains OS data © Crown copyright and database right 2026. Contains Royal Mail data © Royal Mail copyright and database right 2026. District centres and place names: postcodes.io (ONS/OS open data). Totals, ranks and grouping are Global Incident Tracker's own calculations; the Environment Agency does not endorse them.