The centre is one possible option being considered by the Northern Ireland Environment Agency (NIEA), in a bid to boost the tourism potential of the castle.
Councillor Patrick Clarke – a long-time campaigner on the issue – received news of the planned changes from the Environment Minister earlier this week.
He said: “It is about time some proper consideration was given to the tourism potential of Dundrum Castle. After all it is one of County Down’s hidden treasures.
“Currently the NIEA is responsible for maintaining Dundrum Castle and I wrote to the Environment Minister, highlighting the current lack of investment in the historic site.
“For a long time development has been held up until ownership of Castlehill, the unadopted private road leading directly to the Dundrum Castle, could be determined. I am pleased to hear that not only is the NIEA going to continue searching for the legal deed of title but that this unregistered piece of land will no longer hold up further improvements.
“I also acknowledge the hard work of the NIEA in trying to improve public access to the site, both my landscaping the car park and improving pedestrian access from it to the castle. I will be continuing to monitor the situation to make sure these plans become a reality.”