Radon · Knocklyon, Dublin
Radon in Knocklyon: about 1 in 20 homes
The EPA predicts about 1 in 20 homes in this area is likely to have high radon levels at the centre of Knocklyon. Below: how the band changes across the town, and what to ask the seller.
Figures compiled from the public records listed at the foot of this page. Data snapshot: . Updated when the records change.
Check one house in Knocklyon
About 1 in 20 homes in Knocklyon above the radon reference level.
One specific house in Knocklyon: radon band for that Eircode, flood zone, planning applications within 300 m, BER, sale history. Thirty-eight checks in all, each linked to the public record.
€19.99, free snapshot first. No account.
Or read the sample report first: a real house, 16 pages.
1 in 20
homes predicted above 200 Bq/m³ at the town centre (EPA)
0/5
of five sample points around the town in a High Radon Area
36%
of Irish towns we sampled sit in a High Radon Area (388 of 1,066)
Radon in Knocklyon: what the EPA map predicts
The EPA radon map divides Ireland into grid squares and predicts, from thousands of measurements, the share of homes in each square likely to exceed 200 becquerels per cubic metre. At the centre of Knocklyon the prediction is about 1 in 20 homes in this area is likely to have high radon levels. That puts the town centre in a low radon area.
We also sampled four points roughly a kilometre north, south, east and west of the centre. None of the five sample points is in a High Radon Area (0 moderate, 5 low).
Radon is a radioactive gas from uranium in the ground. It is the second cause of lung cancer in Ireland after smoking, about 350 cases a year according to the EPA. It has no smell and the only way to know a house’s level is a three-month test.
What it means when buying here
The odds are lower here, but the EPA still recommends testing every home once. Ask the seller whether it was ever tested. A kit costs about €50 to €60. None of this stops a purchase. It changes what you ask the seller and what you set aside.
Also for Knocklyon
Other checks for Knocklyon
- Flood risk in Knocklyon9 recorded floods
- Japanese knotweed in Dublin364 records
- BER ratings in Knocklyontypical C1
- Planning applications in Knocklyon501 applications
- Planning permission in South DublinSouth Dublin County Council
- Planning permission in Dublin50,621 applications
GuideRadon when buying a house: the map, the test and what it costs to fix
Questions people ask
- Is Knocklyon a high radon area?
- The centre of Knocklyon is in a low band on the EPA map (about 1 in 20 homes). Radon still varies house to house; a test is the only way to know.
- Does a house in a high radon area need a radon barrier?
- New houses built since 1998 in High Radon Areas must have a radon barrier under Building Regulations (Technical Guidance Document C). Older houses usually have none. Remediation on an existing house costs roughly €1,500 to €3,000 for a sump and fan, less if it is a matter of sealing and ventilation.
- How do I test a house for radon before buying?
- You cannot test before you own it: the EPA test takes three months with detectors in two rooms. What you can do is ask the seller for any past result, check whether a barrier or sump exists, and budget for a €50 to €60 test kit after moving in. The report tells you the EPA prediction for the exact Eircode grid square.
Sources
Area figures, compiled from public records. They describe the town or county, not any one house. The paid report checks the exact Eircode.