A massive surplus of housing, combined with the late-2000s recession, resulted in a large number of estates being abandoned, unoccupied or uncompleted.
[14] During Ireland's economic boom, which began in the mid-1990s and lasted until 2007, local government incentives, an influx of labour from Eastern Europe and abundant, easily available consumer credit combined with house price inflation in Dublin, resulted in a large number of housing estates being built in commuter towns and villages surrounding the country's capital.
[5][15] In 2008, it was reported that Irish banks had lent 25 billion euro to builders and property developers for the construction of apartments and houses.
[18] A further study, conducted by NIRSA in January 2010 produced data showing there were more than 300,000 vacant new homes in Ireland, and 621 ghost estates.
[19][21] The exact number of unused or incomplete houses is unknown; a nationwide audit is currently being undertaken, with the results due in Summer 2010.
[4] However some estates lack infrastructure such as roads and lighting, and have no access to schools and other amenities, and have been described as having, "no potential to be economically viable.
In spite of that, however, the Housing Executive estimated in August 2011 that there were up to 5,000 unfinished homes in Northern Ireland, though ghost estates themselves are rare.
Projects such as new neighbourhoods (such as the Chenggong District), shopping malls, and even theme parks are empty and/or incomplete because of the economic slowdown.