Flood Risk Assessments & Drainage Strategies in Sheffield
Independent flood risk consultants serving Sheffield and surrounding areas. Planning-ready FRAs and SuDS drainage strategies from £295, delivered within 3–5 working days.
Flood Risk Assessments in Sheffield
Flood Risk Environmental provides Flood Risk Assessments, SuDS drainage strategies and detailed drainage design for planning applications across Sheffield and the wider South Yorkshire region.
Sheffield has notable flood risk from the River Don and the Rivers Sheaf, Rivelin and Loxley, following the major 2007 and 2019 flooding events. The city has some of the most complex flood risk in England, with many areas in Flood Zone 3 and high surface water flooding risk. Sheffield City Council has detailed requirements for FRAs and drainage strategies.
Our reports are prepared by a qualified consultant with over 17 years' experience and written specifically to satisfy the requirements of Sheffield City Council as the Lead Local Flood Authority and your local planning authority.
Services in Sheffield
- Flood Risk Assessments — from £295
- SuDS drainage strategies for planning
- Detailed SuDS and drainage design
- LLFA SuDS proforma completion (Sheffield City Council)
- Sequential and Exception Test submissions
- S23 Ordinary Watercourse Consent
- EA Flood Risk Activity Permit applications
- LLFA drainage objection responses
Flood risk in Sheffield
Sheffield sits at the confluence of five rivers — the Don, Sheaf, Loxley, Rivelin and Porter — draining steep Peak District catchments. These 'flashy' catchments respond very quickly to heavy rainfall, as the severe June 2007 floods demonstrated, when the Don and its tributaries caused widespread damage and loss of life across the city. Valley-floor and riverside sites carry real fluvial risk and need an FRA with careful attention to rapid-onset flooding, safe access and floor levels.
The steep urban topography also drives significant surface water flooding, so run-off management is a key part of most drainage strategies.
Sheffield City Council is the Lead Local Flood Authority. We prepare FRAs and SuDS drainage strategies that reflect the city's fast-responding catchments and the council's requirements.
Local flood facts — Sheffield
- Main watercourses: River Don, Sheaf, Loxley, Rivelin and Porter
- Lead Local Flood Authority: Sheffield City Council
- Main flood sources: Fluvial (rapid response) and surface water
- Key FRA consideration: Steep 'flashy' catchments and the legacy of the June 2007 floods
When Do You Need a Flood Risk Assessment in Sheffield?
Planning applications in Sheffield require a Flood Risk Assessment in the following circumstances:
Development in Flood Zone 2 or 3
Any development in London's Flood Zone 2 or 3 areas requires an FRA. The LLFA will object to applications in flood risk areas without a robust FRA and drainage strategy.
Major Applications (10+ dwellings)
Major planning applications in Sheffield — 10 or more dwellings, sites over 0.5ha, or non-residential floorspace over 1,000m² — require an FRA in any flood zone.
Sites Over 1 Hectare in FZ1
Large sites in Flood Zone 1 may require an FRA if over 1 hectare, to demonstrate that drainage is adequate and runoff won't increase downstream flood risk.
LLFA Drainage Conditions
Where Sheffield City Council has imposed a pre-commencement drainage condition, we prepare the detailed SuDS design package needed to satisfy the condition and secure approval.
LLFA Drainage Objections
If your Sheffield planning application has received a flood risk or drainage objection from the LLFA, we can review it and prepare a technical response to resolve it fast.
Change of Use
Converting commercial buildings to residential use in a flood risk area in Sheffield typically requires a new Flood Risk Assessment to confirm future occupiers will be safe.
Frequently Asked Questions
Trusted by Developers, Architects & Planning Consultants
★★★★★ 5.0 from 6 Google reviews
“Antony was great to work with when we needed a Flood Risk Assessment and Emergency Flood Plan. As an architect I would definitely use FRE Consultants again… his report went a good way in helping us get planning permission on a tricky site. Highly recommended.”
“Antony carried out my Flood Risk Assessment and has done a great job. My architect commented that the report was professionally drafted and very easy to follow. I highly recommend Antony's services.”
“Antony carried out a SuDS report for one of our projects and provided an excellent service throughout — quick to respond, clear communication, and a thorough, detailed report within the agreed timescale. We will certainly be using his services on all future projects!”
“Extremely helpful, prompt and friendly service carrying out a Flood Risk Assessment for a home project that required planning permission in a flood risk area… the price was reasonable and given up-front, and the final report was highly professional and exactly as required.”
“I had an extension completed on my house and needed a Flood Risk Assessment for planning. The service received was great and at a competitive cost. We were granted planning after first submission.”
“Nice and quick service. Recommend A++”
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