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Up to Medium likelihood
Properties in DN3 1LN sit in the Environment Agency's Medium 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% | 41 | 41 |
| Low | 0.1% – 1% | 0 | 0 |
| Very low | below 0.1% | 0 | 0 |
Over a 25-year mortgage, a property in a medium-likelihood area has a 22–57% chance of flooding at least once.
The ground here sits at about 8 m above sea level and falls 8 m across the surrounding 800 m. Surface water reaching this point runs off ground lying to the north, 3.4 m higher.
Because properties in the medium likelihood band; 3 recorded floods nearby; 194 official warnings since 2006.
The map above shows the real EA rivers & sea likelihood cells around DN3 1LN. 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 |
|---|---|---|
| Feb 2022 | 2022 February Flood Incident -Storm Dudley, Eunice and Franklin | ~10.9 km |
| Jan 2021 | 2021 January Flood Incident - Storm Christoph | ~13.0 km |
| Feb 2020 | 2020 February Flood Incident - Storm Dennis | ~21.9 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.
Babet (2023, 19 warnings nearby) · Henk (2024, 8 warnings nearby) · Franklin (2022, 6 warnings nearby) · Darcy (2021, 3 warnings nearby)
| Gauge | River | Distance | Typical high | Highest on record |
|---|---|---|---|---|
| Kirk Bramwith | River Don | 2.7 km | 5.40 m | 7.58 m |
| Fishlake Woodhouse Ings (Temporary) | Green Dyke | 4.5 km | 2.50 m | 4.41 m |
| Bentley Ings Screen | Fowler Bridge Drain | 5.5 km | 4.48 m | 4.46 m |
| Doncaster Strawberry Island Temp | Dun Navigation Canal | 5.9 km | 7.75 m | 7.73 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 |
|---|---|---|---|---|
| Ramper Lane No 2 Sps | Town End Drain | 0.9 km | 5 (2024) | 4 |
| Boundary Avenue Combined Sewer Overflow* | Not Matched In Ea Consents Database | 3.6 km | 8 (2024) | 3 |
| Sandall Wwtw | R. Don & R. Don (old Course) | 3.6 km | 11 (2024) | 158 |
| Ramskir Lane No 2 Cso | Stainforth Drain (ditch) | 4.1 km | 4 (2024) | 2 |
Official annual EDM figures — a water-quality signal for local watercourses, not a property flood-risk factor.
No mapped flood-defence assets within 500 m of the postcode centre. 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 DN3 1LN — all in the DN3 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. 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 DN3 district.