Does GL17 9DB flood?

Drybrook, Gloucestershire

Up to High likelihood

Properties in GL17 9DB 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%	2	1
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 around GL17 9DB

The ground here sits at about 164 m above sea level and falls 72 m across the surrounding 800 m. Surface water reaching this point runs off ground lying to the west-north-west, 17.8 m higher.

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Get the full flood report for GL17 9DB — £19 Free preview first · instant access · no account needed The detail below — flood history, warnings, rivers, overflows — is part of FloodRadar's property flood-risk report. The official band above is free; the preview shows more before you decide.

Inside the full report for GL17 9DB

FloodRadarProperty Flood-Risk Report

GL17 9DB

Elevated flood risk — professional assessment recommended

Because properties in the high likelihood band; 1 recorded flood nearby; 162 official warnings since 2006.

E Today — indicative grade (A best → E)

··· By the 2050s — EA climate scenario (in the full report)

⚑ Official warning within 10 km: Yes ⚑ Recorded flood nearby: Yes ⚑ Flood defences within 500 m: No ⚑ In flood zone 2 or 3: ···

Rivers & sea

Up to High

Surface water

···

Groundwater

Not assessed

Historic flooding

Recorded nearby

Warning history · flood map with building picker · 2050s view · insurance outlook · every dataset receipt — 18 sections

Flood-risk map of this area

Environment Agency flood-likelihood cells

High (>3.3%/yr) Medium Low Very low Marker = postcode centre Base map © OpenStreetMap contributors

Rivers & sea likelihood · illustrative

Surface water (flash flooding) · illustrative

Flood Zones 2 & 3 (planning) · illustrative

2050s projection (climate) · illustrative

The map above shows the real EA rivers & sea likelihood cells around GL17 9DB. 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.

Official flood warnings near GL17 9DB

162

flood alerts & warnings within 10 km since 2011

of them full flood warnings or severe warnings

2026

most recent warning nearby (2026-03-13)

Warnings cover flood areas, not individual addresses.

Recorded floods near this postcode

Date	Recorded flood	Approx. distance
Dec 1981	Tidal Severn	~13.8 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.

Named storms that brought flooding here

2013-14 UK winter floods (2013, 17 warnings nearby) · Bert (2024, 3 warnings nearby) · Eunice (2022, 3 warnings nearby) · Dudley (2022, 2 warnings nearby)

The rivers that matter for GL17 9DB

Gauge	River	Distance	Typical high	Highest on record
Lydbrook	River Wye	4.6 km	4.00 m	7.55 m
Parkend	River Lyd	9.1 km	0.60 m	1.35 m
Marstow Mill	Garren Brook	9.2 km	1.13 m	1.44 m
Sandford Bridge	Rudhall Brook	9.7 km	0.31 m	1.23 m

Live levels, predictions and rain-response behaviour are on each gauge's page and in the property report.

Storm overflows within 5 km

Overflow	Discharges into	Distance	Spills	Hours
Cinderford Crumpmeadow Stw	Trib Of Cinderford Brook	2.1 km	73 (2024)	678
Lorry Park Storm Overflow	Cinderford Brook	2.3 km	39 (2024)	156
Greenway Road Cso	Cinderford Brook	2.8 km	1 (2024)	6
Mitcheldean - Vantage Point Bv (cso)	Longhope Brook	3.6 km	17 (2024)	5

Official annual EDM figures — a water-quality signal for local watercourses, not a property flood-risk factor.

Flood defences

No mapped flood-defence assets within 500 m of the postcode centre. Defences reduce risk, never remove it.

What the full property report adds

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.

Flood risk at nearby postcodes

GL17 9JD up to High GL17 9JJ up to High GL17 9JN up to Low GL17 9JS up to Low GL17 9JW up to Low GL17 9LG up to High GL17 9LH up to High GL17 9LQ up to High GL17 9NA up to Medium GL17 9NG up to High GL17 9NJ up to Low GL17 9NN up to High

At-risk postcodes near GL17 9DB — all in the GL17 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 GL17 district.