Flood Risk Assessments (FCA) for Planning Applications in Wales

Planning Advice for Flood Risk and FCA Requirements

Clwydian Planning provides expert advice on flood risk management for development sites across North Wales. We support planning applications with input into Flood Consequence Assessments (FCAs), which are required for proposals in areas at risk of flooding. These assessments help demonstrate that developments are suitable, compliant with Welsh planning policy, and do not increase risk to people or property. We advise clients on when an FCA is likely to be required, how it affects planning strategy, and how to address it effectively within an application.

When a Flood Consequence Assessment is Needed in Wales

For developments located in flood zones C1 or C2, as identified on the Welsh Government’s Development Advice Map, an FCA will typically be necessary. Sites in Zone B may also require assessment depending on their elevation relative to known flood levels. We also advise on the preparation of flood warning and evacuation plans, which are increasingly requested to support safe development. With in-depth knowledge of local authority requirements and national policy, Clwydian Planning ensures that flood risk is addressed properly, avoiding delays and strengthening your planning case.

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A Flood Risk Assessment is a technical report that evaluates the likelihood and impact of flooding on a proposed development. It considers fluvial (river), coastal, surface water and other sources of flood risk, and outlines measures to mitigate these risks where necessary.
The terms are similar, but the terminology differs by country. In Wales, the correct term is Flood Consequence Assessment (FCA) and it aligns with the requirements of Technical Advice Note 15 (TAN15). In England, the equivalent report is known as a Flood Risk Assessment (FRA). Both serve the same purpose of assessing and addressing flood risk in the planning process.
If your development is located in an area at risk of flooding, or increases impermeable surface area, planning authorities may require an FCA to demonstrate that the development is safe, sustainable and in line with national and local policies. Submitting a clear and accurate assessment early in the planning process helps prevent objections and improves your chances of gaining approval.