Narrow Water Castle is the private home of the Hall family who have lived at Narrow Water since 1670, originally in the Old Narrow Water Keep situated on the shoreline of Carlingford Lough which is now a national monument.

As a private home the main Castle building is generally not open for public admission, however, during the months of July and August visits can be arranged by appointment only. The gardens can be visited during May, June, July and August.

In 1816 construction began on the new Castle by Thomas Duff, a well-known Newry architect who also designed the Cathedrals in Newry, Armagh and Dundalk. The Elizabethan revival style castle is made from local granite and built next to the existing house, Mount Hall (1680). It was completed in 1836