An Bord Pleanala has agreed that it made a mistake in granting permission for more than 500 homes to be built next to a Dublin park.
After the development was approved earlier this year, people already living near St Anne's Park in Clontarf argued the project would impact wildlife and a local sports club.
Today, the planning authority told a court it is prepared quash the permission.
Local Councillor John Lyons believes it should never have been given in the first place.
"Oh it was horrendous, it was an appaling decision to grant the developer planning for over 500 housing units", he said.
Councillor Lyons described St. Anne's Park as "the cream of the crop", and argued that allowing the development to proceed "would have been a crime against the common good, our common shared space and our collective well-being as a city".
Councillor Lyons admitted that Dublin is in desperate need of affordable housing, but said it should be built in areas which are designated for homes.