Watch Tower

The watch tower, built in 1849, is located on Tower Street in Roa Island and was originally a customs house that has since been converted into a workshop. The structure features pebbles laid in chevrons with red sandstone dressings and a graduated slate roof. It has a central archway flanked by a two-storey, one-bay boathouse wing on the left and a small square tower on the right. The building displays quoins and a chamfered plinth.

The archway is two-centred, double-chamfered, and includes a keystone, with two patterned shields positioned below a corbel table that supports three merlons. The boathouse, which is set forward on the left, has a doorway with a deeply-chamfered, quoined surround and a square-sectioned hoodmould. Above this doorway is a two-light chamfered, mullioned window featuring latticed iron casements. There is also a stair turret on the left with slit windows, and a shield beneath the corbel table leading to incomplete embattlements, along with a corner turret on the right. The tower on the right side of the arch has a lancet window and a door on its left return. At the rear, there is a blocked pointed arch leading to the boathouse, with a two-light window above it, mirroring the front.