CEO and founder of the Jack and Jill Foundation, Jonathan Irwin, said real problems were raised at the 10-day oral hearing at the end of last year.
Anyone who was involved in the hearing has eight weeks to seek a judicial review of An Bord Pleanála’s decision to grant planning permission.
Mr Irwin said a number of people were considering applying for a judicial review. “While the issue is not being led by us, I am aware that people are thinking about it very seriously,” he said.
The planning authority received over 100 project observations, and most were critical of the development.
“Parents outside of Dublin are very angry. They see this as a real slap in the face for rural Ireland,” said Mr Irwin.
The Jack and Jill Foundation wanted the hospital to be built beside Connolly Hospital in Blanchardstown on the outskirts of Dublin.
“We have no vested interest in Connolly, except to say that it would be better for children,” said Mr Irwin.
The children’s charity —which supports chldren with brain damage who suffer severe intellectual and physical trauma— had a profession team that led its campaign during the oral hearing.
“I am aware that it is possible to apply for a judicial review of the decision. I am going to meet with our professional team next week and will be guided by them,” he said.