The neighbourhood report Dún Laoghaire–Rathdown
Newtown Castlebyrn
The name — 'Newtown Castle Byrne' — recalls the medieval castle and settlement that once stood near present-day Blackrock. This townland sits between Blackrock and Williamstown, with residential streets that have developed over successive decades. The proximity to Blackrock village, its DART station, and the coastal amenities gives the area strong practical advantages, while the older place-name connects it to the Norman heritage of south County Dublin.
Property Map
Price Trend
Based on 150 recorded sales across all years
Can you afford to buy in Newtown Castlebyrn?
The median property here is €585,000. Check if it's within reach with our affordability calculator.
Major Streets and Housing Developments
Stradbrook Hall
€583K · 12 propertiesRowanbyrn
€745K · 11 propertiesRockford Park
€558K · 10 propertiesOther streets (19)
Rockville Crescent
€598K · 8 propertiesNewtownpark Avenue
€569K · 7 propertiesBrookville Park
€640K · 6 propertiesRockville Road
€600K · 6 propertiesRowan Park
€736K · 6 propertiesRowan Park Avenue
€865K · 6 propertiesWynberg Park
€730K · 4 propertiesRockville Drive
€1.1M · 3 propertiesRockville Park
€525K · 3 propertiesMelfort
€706K · 2 propertiesSpringhill Cottages
€458K · 2 propertiesArd Cloc
€915K · 1 propertyCarraig
€995K · 1 propertyErrigal
€1.3M · 1 propertyFilmar
€850K · 1 propertyRockford Terrace
€570K · 1 propertyRowanbrynn
€840K · 1 propertyStradbrook Road
€850K · 1 propertyWansdowne
€885K · 1 propertyCompare with Nearby Areas
See how Newtown Castlebyrn stacks up against other areas in Dún Laoghaire–Rathdown.
Other Areas in Dún Laoghaire–Rathdown
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Frequently Asked Questions
What is the median house price in Newtown Castlebyrn?
The median property price in Newtown Castlebyrn, Dún Laoghaire–Rathdown is €585,000, based on 139 recorded sales.
How many properties have sold in Newtown Castlebyrn?
139 properties have been recorded as sold in Newtown Castlebyrn, Dún Laoghaire–Rathdown in the last 16 years.
What is the most expensive street in Newtown Castlebyrn?
The most expensive street in Newtown Castlebyrn by median price is Rockville Drive at €1,050,000.
How does Newtown Castlebyrn compare to Dún Laoghaire–Rathdown?
The median price in Newtown Castlebyrn (€585,000) is 8% above the Dún Laoghaire–Rathdown median of €541,615.
What is the investment growth rate in Newtown Castlebyrn?
Based on 17 repeat-sale properties in Newtown Castlebyrn, values have changed by a median +5.4% per year over 14.5 years (2011 to 2026).
How have prices changed in Newtown Castlebyrn over time?
The median sale price in Newtown Castlebyrn has risen 164% from €283K in 2010 to €745K in 2026, based on 150 recorded sales. In the last 5 years, it has fallen 2%.