extension cost per square metre dublin
The Home Improvement Index from Onlinetradesmen.ie also found a notable difference in prices for extending the home, depending on whether it is in Dublin or a rural area. The national average cost for an extension stands at â¬981 per square metre, with the average for a rural area set at â¬908 per square metre.However in Dublin, the average costs is â¬1,069 per square metre â 15% more expensive than rural equivalents.Nationally, the cost of extensions has increased by 3% in the first half of this year. The average spend per home extension was â¬25,495.owever in Dublin, the average costs is â¬1,069 per square metre â 15% more expensive than rural equivalents.