It is yet another consequence of the combination of lax attitudes, greed, shameful and immoral way of operating public and private services (planning, solicitors, finance et al) in the 'boom'. The generally Irish attitude of 'it will be grand' and 'shur what harm' has come back to bite it a serious way.
I am aware that all of government is broke but it is shameful to now seek redress from the home owners in this. I'd be looking at the whole area of enforcement of ensuring what got planning actually was built as given if I was looking for revenue.