The site of former Dublin department store Clerys will be redeveloped and given a new rooftop level, under plans approved by the local council.
It will also house a hotel, shops, office space and restaurants. Dublin City Council has granted planning permission to the project, which will be carried out by architects Henry J Lyons.
The landmark building on O’Connell Street closed last year, shortly after it was bought by Guernsey real estate company Natrium - resulting in the the loss of more than 450 jobs.
As part of the restoration project, the Portland stone facade of the building will be cleaned, and the windows and double staircase restored. There will be a glass atrium in the new rooftop level.
The plans, which were unveiled on the council’s website, propose to restore “an element of grandeur” to the building.
A timetable for the work has not been given.