Flood Risk Assessments & Drainage Strategies in Cardiff
Independent flood risk consultants serving Cardiff and surrounding areas. Planning-ready FRAs and SuDS drainage strategies from £295, delivered within 3–5 working days.
Flood Risk Assessments in Cardiff
Cardiff planning applications require a Flood Consequence Assessment (FCA) under TAN15 (2024) rather than a standard Flood Risk Assessment. We prepare FCAs for all Welsh LPA areas. Learn more about TAN15 FCAs →
Flood Risk Environmental provides Flood Risk Assessments, SuDS drainage strategies and detailed drainage design for planning applications in Cardiff and across the capital of Wales and its largest planning market, requiring Flood Consequence Assessments under TAN15 rather than standard FRAs.
Cardiff has significant flood risk from the River Taff and the Severn Estuary, with extensive areas of the city in high flood risk DAM zones under TAN15 (2024). Cardiff Council and Natural Resources Wales (NRW) are the key consultees for flood risk in Cardiff. Planning applications in Cardiff's flood risk areas require a Flood Consequence Assessment (FCA) under TAN15 rather than an FRA.
Our reports are prepared by a qualified consultant with over 17 years' experience and are written specifically to satisfy the requirements of Cardiff's local planning authority and Cardiff Council (Local Flood Risk Management Authority) / Natural Resources Wales as the Lead Local Flood Authority. We understand what your specific LPA and LLFA need from a flood risk or drainage submission.
Get a Free Quote for CardiffServices in Cardiff
- Flood Risk Assessments — all flood zones, from £295
- SuDS drainage strategies for planning
- Detailed SuDS and drainage design
- LLFA SuDS proforma completion (Cardiff Council (Local Flood Risk Management Authority))
- Sequential and Exception Test submissions
- Flood Consequence Assessments (TAN15)
- S23 Ordinary Watercourse Consent applications
- EA Flood Risk Activity Permit applications
- Construction Surface Water Management Plans
- LLFA drainage objection responses
When Do You Need a Flood Risk Assessment in Cardiff?
Planning applications in Cardiff require a Flood Risk Assessment in the following circumstances:
Development in Flood Zone 2 or 3
Any development in Cardiff's Flood Zone 2 or 3 areas requires an FRA. The LLFA (Cardiff Council (Local Flood Risk Management Authority)) will object to applications in flood risk areas without a robust FRA and drainage strategy.
Major Applications (10+ dwellings)
Major planning applications in Cardiff — 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 Cardiff's Flood Zone 1 areas may still require an FRA if they are over 1 hectare, to demonstrate that drainage is adequate and runoff won't increase downstream flood risk.
LLFA Drainage Conditions
Where Cardiff Council (Local Flood Risk Management Authority) 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 Cardiff 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 Cardiff typically requires a new Flood Risk Assessment to confirm future occupiers will be safe from flooding.
Why Choose Flood Risk Environmental in Cardiff?
17+ Years' Experience
We've prepared hundreds of FRAs and drainage strategies across England and Wales, including many in Cardiff and the surrounding area. We know what Cardiff's LPA and LLFA need.
Written to Pass First Time
Our reports are tailored to your specific site and the known requirements of Cardiff Council (Local Flood Risk Management Authority) — not generic template reports that generate objections.
Fast & Fixed-Fee
FRAs from £295 with 3–5 working day turnaround. Fixed quotes provided before we start — no hidden costs or unexpected extras.
Direct Access
You deal directly with a qualified flood risk consultant throughout — no juniors, no account managers, no delays in getting answers.
All Services & Resources
Everything you need for flood risk, drainage and environmental planning consultancy across England and Wales.
Flood Risk
Drainage
Other Services
Areas Covered
Need a Flood Risk Assessment in Cardiff?
Get a free, no-obligation quote for your Cardiff planning application within 24 hours. Fixed fees, fast turnaround, written to pass first time.
Get a Free QuoteOr contact us directly: 07826 705389 • [email protected]