Is Monkstown in a flood zone?

Parts of Monkstown are. The OPW has mapped river flood extents within about 1.5 km of the town centre. A zone covers streets, not the whole town, so the answer for one house depends on where it stands. The report checks the exact Eircode against the 1 in 10, 1 in 100 and 1 in 1000 year extents.

Will a house in Monkstown be hard to insure against flooding?

Insurers price by postcode and by the OPW record. With 23 recorded events within 2 km, expect questions on the proposal form and possibly a flood exclusion on some streets. Ask the seller for their current policy schedule: if flood is excluded, you will inherit that problem.

What does the paid report add for a house in Monkstown, Dublin?

It puts the Eircode point against every OPW flood extent, lists recorded floods within 500 m with dates and OPW notes, checks GSI groundwater flood maps and coastal erosion, and ranks the result against the other thirty-seven checks (radon, BER, planning, knotweed, title, sewer and more) for that one address.

Flood risk · Monkstown, Dublin

Flooding in Monkstown: 23 recorded floods, OPW flood zones

The OPW register holds 23 recorded floods within 2 km of the centre of Monkstown, and the OPW has mapped river flood extents nearby. What that means for a house here, and how to check the exact address.

Figures compiled from the public records listed at the foot of this page. Data snapshot: 2 October 2026. Updated when the records change.

Check one house in Monkstown

23 recorded floods within 2 km of Monkstown, OPW flood zones on the map.

One specific house in Monkstown: flood zone for that Eircode, recorded floods within 500 m, radon, planning applications within 300 m, BER, sale history. Thirty-eight checks in all, each linked to the public record.

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Or read the sample report first: a real house, 16 pages.

recorded flood events within 2 km of the town centre (OPW)

Yes

river flood extent mapped nearby (1 in 100 year, OPW CFRAM)

coastal flood extent mapped nearby (1 in 200 year)

What the OPW record says about Monkstown

The Office of Public Works keeps a register of past floods. Within 2 km of the centre of Monkstown it holds 23 events, the latest in 2018. By source: coastal/estuarine waters (3), runoff (3), other (3), river (3), low lying land (1). A recorded event does not mean every street went under. It means an insurer’s model knows the town.

Most recent on file:

March 2018: Flooding at Monkstown on 02/03/2018 (coastal/estuarine waters). Train line flooded at Monkstown and closed for one day. Five properties flooded in Brighton Vale.
October 2011: Flooding at Carysfort Avenue, Blackrock, Co. Dublin on 24th Oct 2011.
October 2011: Flooding at Pakenham Road, Monkstown, Co. Dublin on 24th Oct 2011.
October 2011: Flooding at O’Rourke Park, Sallynoggin, Co. Dublin. on 24th Oct 2011.
October 2011: Flooding at Newtownpark Avenue, Blackrock, Co. Dublin on 24th Oct 2011.

Separately from past events, the OPW flood maps (CFRAM) draw modelled extents for river flooding near Monkstown. A house inside the 1 in 100 year river extent, or the 1 in 200 year coastal extent, will usually need a flood-specific conversation with the insurer before you can draw down a mortgage.

What to do before bidding on a house here

Look the exact address up on the OPW map, not the town. Two houses on the same road can sit on opposite sides of an extent line. Ask the seller in writing whether the house or garden has ever flooded and whether a flood claim was made. Ask for the current insurance schedule. If the house is inside an extent, get a quote before going sale agreed: some insurers decline outright, and the bank will not lend without cover.

The report on this site checks flood for one Eircode in about a minute. The paid report adds the distance to each recorded event, which extents the point falls in, and the GSI groundwater map, all with links to the source so a solicitor can rely on them.

Also for Monkstown

Radon in Monkstown · Planning applications in Monkstown · BER ratings in Monkstown · Flood risk across Dublin

Nearby: Dun Laoghaire, Blackrock, Glenageary, Stillorgan, Foxrock, Cabinteely.

Other checks for Monkstown

Radon in Monkstownlow radon area
Japanese knotweed in Dublin364 records
BER ratings in Monkstowntypical C2
Planning applications in Monkstown1,065 applications
Planning permission in Dún Laoghaire-RathdownDún Laoghaire-Rathdown County Council
Planning permission in Dublin50,621 applications

GuideIs my house in a flood zone? What the OPW maps say and what insurers do with them

Questions people ask

Is Monkstown in a flood zone?: Parts of Monkstown are. The OPW has mapped river flood extents within about 1.5 km of the town centre. A zone covers streets, not the whole town, so the answer for one house depends on where it stands. The report checks the exact Eircode against the 1 in 10, 1 in 100 and 1 in 1000 year extents.
Will a house in Monkstown be hard to insure against flooding?: Insurers price by postcode and by the OPW record. With 23 recorded events within 2 km, expect questions on the proposal form and possibly a flood exclusion on some streets. Ask the seller for their current policy schedule: if flood is excluded, you will inherit that problem.
What does the paid report add for a house in Monkstown, Dublin?: It puts the Eircode point against every OPW flood extent, lists recorded floods within 500 m with dates and OPW notes, checks GSI groundwater flood maps and coastal erosion, and ranks the result against the other thirty-seven checks (radon, BER, planning, knotweed, title, sewer and more) for that one address.

Sources

Area figures, compiled from public records. They describe the town or county, not any one house. The paid report checks the exact Eircode.