quote for extension kilkenny

I was looking for a rough quotation for an extension to an existing bungalow for use as a sitting room and seperate dining room. I haven't got exact measurements but it would be around 15'x20'. The existing bungalow also has a garage so would it be possible to extend the bungalow to meet the garage thus incorporating the two in one?

From quotes got recently I,d estimate extensions are running at approx €130 per sq ft, + or - 10€.