First-time buyers in parts of Dublin are spending up to 40 percent of their income on their mortgage.
The finding is part of a new ESRI study which looked at the affordability of the national housing market.
It found the average buyer in Wicklow, Kildare and Meath also spend at least 30 percent of their monthly income on their home.
The ESRI says there's a significant urban/rural divide in the figures:
Warning: Baby Formula Recalled Over Potential Toxin Risk
New Year Blow As Wicklow Town Falls In Latest IBAL Litter Rankings
Wicklow Gardaí Urge Extreme Caution On Road Safety This Christmas
Wicklow Coastguard Urges Safety First for Christmas and New Year Dips
Wicklow Commuters To Benefit As New DART Trains Set To Transform Coastal Commuting