I've no sympathy for the owners. They took a very big gamble and it didn't pay off. They applied for planning permission, were refused, and went ahead anyway. Oh, except they built a house twice as big as they'd originally planned. In short, they stuck two fingers up at the establishment and at the planning laws. Their sheer arrogance is just breath taking.
As for their offer to have the house used for charitable purposes - easy to make that offer when you know nobody is ever going to take you up on it. Because, you know, the house was built without planning permission. And then there's the not insignificant detail that the couple who built the house would still own the land. Would the charity be expected to pay rent for the use of the house? So the couple could profit from breaking the law?
It's a beautiful house and it's a shame it had to be demolished. But I think that Meath County Council (and the judge who made the demolition order) had no choice in the matter. If they had let it go, it would have set a terrible precedent.