Mayo has the highest concentration of derelict properties in the country, holding 14.1% of the national total.
A survey by GeoDirectory found that as of June 2025, there are almost 20,000 derelict buildings in the State.
The national figure represents a 2.9% reduction in comparison to the same time last year, as vacancy rates decreased in 17 counties.
Leitrim has the highest vacancy rate in the country at 11.9%, followed by Mayo (10.6%), Roscommon (10.1%), Donegal (9%) and Sligo (8.4%).
The report notes that derelict address points continue to be concentrated along the west coast of Ireland, with over a third (38.2%) of derelict residential buildings located in Connacht.
Ballina based Fine Gael Senator Mark Duffy says he’s not surprised with the figures for Mayo, and says that “the time for talking is over”.
He has called on Mayo County Council to step up and tackle the dereliction issue.
Senator Duffy has been speaking to Midwest Radio’s Rian Bailey:
