The Supreme Court has ruled that Sligo County Council must pay three quarters of the estimated €7 million legal bill arising from the row over public rights of way at Lissadell Estate.
The court had ruled against the council by finding that three of the four routes on the land were not rights of way.
A part of the fourth route with access to the coast was deemed to be a public right of way.
The full costs of the High Court and Supreme Court legal actions are estimated to be €7 million.
Lissadell House was bought by Constance Cassidy and her husband Eddie Walsh in 2003 for €4m.
The couple spent €9m restoring it and took legal action after the Council passed a motion amending the county development plan to include rights of way through the estate.