Fingal County Council has lodged a joint planning application for a €10m redevelopment of Howth Castle.
The massive revamp would involve conservation and restoration works on the castle, and its grounds.
If it gets the green light, up to 150 new jobs would be created on completion, with 100 jobs during the construction phase.
Tetrarch Capital and the Michael J Wright Group are partnering on the project, and plan to create a visitor and tourist destination.
Howth Castle and Demesne was owned by the Gaisford-St Lawrence family for over 840 years.
Real estate investment and development company Tetrarch acquired the castle and surrounding 470 acres of land together with Ireland’s Eye in 2019, promising to protect and enhance the heritage and natural beauty of Howth Estate.
It plans for 6km of internal walks and cycleways through the estate with the aim of linking Sutton and Howth.
“Our approach will provide access to the Castle, its stableyard, walled gardens and grounds and an array of new amenities. Greenways and parklands will form an integral part of the Estate’s future, which will have sustainability and environmental best practice at its core,” said Michael McElligott, Chief Executive of Tetrarch.
Local hospitality business the Michael J Wright Group is taking a 25-year lease over the castle and also plans to deliver a mix of retail, leisure and food outlets.