The subsea link will allow the exchange of electricity between Ireland and France.
The interconnector will make landfall in Youghal with an underground cable running to a converter station near Carrigtwohill.
The project will improve the security of electricity supply, help achieve climate objectives and reduce the cost of electricity.
In a tweet, Minister Eamon Ryan said it's expected the project will be built and energised by 2026.
An Bord Pleanála has granted planning permission for the Celtic Interconnector, a subsea link that will allow the exchange of electricity between Ireland and France. pic.twitter.com/FSIKpO7zoi
— Eamon Ryan (@EamonRyan) May 24, 2022
