Building costs can vary widely, depending on the type of project: whether it is a standard type of constrution or of an usual, bespoke design. The quality of fittings also affects the cost.
Recently people have found that builders' quotes vary greatly from each other with some chancing a very high quote because they don't really need the work but would be prepared to do it for incredible sums.
The RIAI (Royal Institute of the Architects of Ireland) gives realistic building cost guidelines for a standard construction (the design provisos outlined above can almost double these amounts):
One-off new house:€2,500 to €2,900 a sq m (€232.25 to €269.41sq ft)
Extension:€2,250 to €2,850 a sq m (€209 to €264.7sq ft)
Extension with renovations to an existing house:€2,700 to €3,300 a sq m (€251 to €306.5sq ft)
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