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Malmesbury, Wiltshire
Up to Low likelihood
Properties in SN16 9FQ sit in the Environment Agency's Low flood-likelihood band (worst property). The band is the worst found in the postcode — it describes the land around properties (defence-adjusted, rivers & sea), not any single address, and not today's conditions.
| Likelihood band | Annual chance | Properties | Of which homes |
|---|---|---|---|
| High | greater than 3.3% | 0 | 0 |
| Medium | 1% – 3.3% | 0 | 0 |
| Low | 0.1% – 1% | 8 | 7 |
| Very low | below 0.1% | 0 | 0 |
Over a 25-year mortgage, a property in a low-likelihood area has a 2–22% chance of flooding at least once.
The ground here sits at about 69 m above sea level and falls 30 m across the surrounding 800 m. Surface water reaching this point runs off ground lying to the west-north-west, 8.3 m higher.
Because properties in the low likelihood band; 6 recorded floods nearby; 270 official warnings since 2006.
The map above shows the real EA rivers & sea likelihood cells around SN16 9FQ. The small panels are illustrative previews of the report's per-layer map views — the full report draws each layer for real, plus recorded extents, defences and a building picker on an interactive map.
Warnings cover flood areas, not individual addresses.
| Date | Recorded flood | Approx. distance |
|---|---|---|
| Nov 2012 | Malmesbury_Nov 2012 | ~1.0 km |
| Jan 2008 | This represents flooding in this area in 2008 | ~1.0 km |
| Jul 2007 | EA112_Malmesbury_Surrounding_Area | ~1.3 km |
| Jan 2003 | This represents flooding in this area in 2003 | ~1.0 km |
| Jan 2001 | This represents flooding in this area in 2001 | ~1.0 km |
| Oct 2000 | EA112_Avon_Malmesbury_2000 | ~1.6 km |
EA Recorded Flood Outlines — absence of a record never proves a place has not flooded. The full report tests whether any extent covered the exact spot.
Henk (2024, 11 warnings nearby) · Bert (2024, 6 warnings nearby) · Babet (2023, 5 warnings nearby) · Bella (2020, 4 warnings nearby)
| Gauge | River | Distance | Typical high | Highest on record |
|---|---|---|---|---|
| Crabb Mill | Woodbridge Brook | 0.6 km | 0.68 m | 2.73 m |
| Rodbourne | Gauze Brook | 2.5 km | 0.35 m | 1.41 m |
| Great Somerford | River Avon | 4.0 km | 0.70 m | 2.43 m |
| Brokenborough | Tetbury Avon | 4.1 km | 0.50 m | 1.55 m |
Live levels, predictions and rain-response behaviour are on each gauge's page and in the property report.
| Overflow | Discharges into | Distance | Spills | Hours |
|---|---|---|---|---|
| Malmesbury Wwtw | River Avon | 0.5 km | 80 (2024) | 983 |
| Parliament Row Cso | River Avon (sherston Branch) | 0.9 km | 20 (2024) | 18 |
| St. Johns Bridge Cso | Sherston Avon | 0.9 km | 43 (2024) | 175 |
| St Johns Street Pumping Station | River Avon (tetbury Branch) | 1.0 km | 65 (2024) | 283 |
Official annual EDM figures — a water-quality signal for local watercourses, not a property flood-risk factor.
13 mapped flood-defence assets within 500 m — nearest ~49 m (natural high ground). Defences reduce risk, never remove it.
The interactive flood-risk map with a building picker (your exact house, not the postcode), the 2050s climate view, surface-water and planning flood zones at your building, exact recorded-flood distances, year-by-year warning charts, watercourses including culverted streams, an insurance outlook with the Flood Re rules, and a printable document with every dataset receipt — start with the free preview, unlock for £19.
At-risk postcodes near SN16 9FQ — all in the SN16 district.
© Environment Agency copyright and/or database right 2025. All rights reserved. Some features of this map 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. Place names: Contains OS data © Crown copyright and database rights 2026. Contains Royal Mail data © Royal Mail copyright and database right 2026. Contains National Statistics data © Crown copyright and database right 2026. Licensed under the Open Government Licence v3.0. Recorded Flood Outlines and warning history © Environment Agency copyright and/or database right 2025. Storm-overflow figures: EA Event Duration Monitoring. Flood defences © Environment Agency (OGL v3). This page summarises public area-level data — it is not a flood-risk survey and not a substitute for the official GOV.UK service. All data sources & licences. More postcodes: the SN16 district.