Donegal is ranked as having the worst planning system in the country in a new report by An Taisce.
Each of the country's 34 authorities has been graded in an academic style under 8 criteria, including the percentage of vacant housing stock in a region.
Donegal was one of 9 council's to be given an F grade.
The county had enough residential zoned land in 2010 for an additional population of 180,000 people.
Despite this, approximately 50% of all residential planning permissions in Donegal over the past decade were granted on unzoned land.