How do I check if my property is in a flood zone in Ireland?

The Office of Public Works maintains the national flood information portal at floodinfo.ie, which brings together the Catchment Flood Risk Assessment and Management (CFRAM) programme's predictive flood mapping, historical flood event records, and the Flood Zone A, B and C classifications used under The Planning System and Flood Risk Management Guidelines. Entering an address or eircode, or browsing the interactive map, will show whether a site falls within a mapped flood risk area for river or coastal flooding.

This national mapping is a starting point, not the final word. Local authority development plans typically include their own strategic flood risk assessment maps, which can be more detailed at a local level and are the maps actually applied when assessing a planning application in that area, so it is worth checking the relevant county or city development plan directly as well as the OPW portal.

Neither source captures every flood risk: pluvial (surface water) flooding from heavy rainfall and localised drainage problems, and some groundwater or 'turlough' flooding in limestone areas, may not show clearly on the CFRAM maps, which is one reason a site-specific flood risk assessment is often required for an actual planning application rather than relying on desktop mapping alone.