Castleknock
What it takes to buy at the Castleknock median, and the average rent for 2025 Q4. Plain facts, illustrative only — nothing here is a personalised verdict or financial advice.
Buying
How much you need to earn to buy in Castleknock
D15Castleknock1,514 registered sales · 12 mo€450,000median
Median home €450,000. Illustratively about €1,810/month and about €101,300 gross income needed to buy it as a first-time buyer with a 10% deposit over 30 years, under Central Bank lending rules, at a representative rate of 3.48% (as of May 2026).
Illustrative only, not financial advice. Your borrowing depends on your circumstances and lender.
Central Bank mortgage rules →Renting
Average rent in Castleknock
Average rents from tenancies registered with the Residential Tenancies Board, 2025 Q4. Rent is published by town or county, not per Eircode area — the label shows which applies here.
Town average · Castleknock · 2025 Q4
1-bed
No 1-bed data for this area
2-bed
€2,0342-bed avg /mo
3-bed
€2,3263-bed avg /mo
▲5.8% vs 2024 Q4