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Up to High likelihood
Properties in S17 4HD sit in the Environment Agency's High 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% | 3 | 0 |
| Medium | 1% – 3.3% | 0 | 0 |
| Low | 0.1% – 1% | 0 | 0 |
| Very low | below 0.1% | 0 | 0 |
Over a 25-year mortgage, a property in a high-likelihood area has at least a 57% chance of flooding at least once.
The ground here sits at about 149 m above sea level and falls 52 m across the surrounding 800 m. Surface water reaching this point runs off ground lying to the west, 12.9 m higher.
Because properties in the high likelihood band; 6 recorded floods nearby; 167 official warnings since 2006.
The map above shows the real EA rivers & sea likelihood cells around S17 4HD. 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 |
|---|---|---|
| Jan 2021 | 2021 January Flood Incident - Storm Christoph | ~64.8 km |
| Feb 2020 | 2020 February Flood Incident - Storm Dennis | ~62.1 km |
| Nov 2019 | 2019 November Flood Incident | ~33.2 km |
| Jun 2007 | June 2007 Surface Water Flooding Yorkshire | ~38.9 km |
| Jun 2007 | 2007 River Sheaf - Abbeydale | ~1.8 km |
| Jun 2007 | 2007 Totley Brook | ~0.3 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, 22 warnings nearby) · Franklin (2022, 8 warnings nearby) · Elin (2023, 5 warnings nearby) · Fergus (2023, 5 warnings nearby)
| Gauge | River | Distance | Typical high | Highest on record |
|---|---|---|---|---|
| Dore Twenty Well Lane | River Sheaf | 1.5 km | 0.80 m | 2.25 m |
| Dronfield Dam | River Drone | 3.6 km | 3.43 m | 8.27 m |
| Dronfield | River Drone | 3.9 km | 0.70 m | 1.08 m |
| Sheffield Centenary Works | River Sheaf | 5.0 km | 0.90 m | 1.85 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 |
|---|---|---|---|---|
| Holmesfield Stw | Holmesfield Brook | 2.3 km | 75 (2024) | 571 |
| Greenhill Park Pavillion Cso | Tributary Of River Drone | 2.9 km | 7 (2024) | 16 |
| Greenhill Park Cso | Tributary Of River Drone | 3.5 km | 4 (2024) | 10 |
| Dronfield Yard Cso | River Drone | 3.8 km | 23 (2024) | 16 |
Official annual EDM figures — a water-quality signal for local watercourses, not a property flood-risk factor.
23 mapped flood-defence assets within 500 m — nearest ~126 m (natural high ground, engineered high ground, bridge abutment). 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 S17 4HD — all in the S17 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 S17 district.