Mayo has the second-highest number of vacant houses in the country.
The number of vacant dwellings in Ireland exceeded 90,000 at the end of last year - which represents over 4% of the national housing stock.
Leitrim had the country's highest residential vacancy rate at 13%, followed by Mayo at almost 12% and Roscommon at 11.6%.
The lowest residential vacancy rates in the country were in Dublin, Kildare, Waterford and Louth.
That's according to the latest GeoDirectory Residential Buildings Report, which found that 296 new residential address points in Mayo were added to the database last year, while a further 424 new houses were under construction in the county in the last quarter of 2021.
Meanwhile there are almost 3,000 derelict residential units in Mayo.
Mayo has the highest percentage share of derelict buildings nationally.
The report also shows that the average residential property price in Mayo last year was €171,000 - with the highest prices in Westport, averaging almost €230,000.