1 Castletown

This is a complex of buildings dating from the mid-to-late 19th century, originally a customs house, with an early 20th-century railway station attached to the east. Later 20th-century alterations and additions have been made.

The buildings are constructed from various materials. The former railway station and flanking walls are of coursed, rock-faced stone with ashlar dressings, while the addition to the second building is rendered, and the second building itself is of snecked stone. All have slate tile roofs.

The layout is linear, comprising a single-storey railway station with associated walls, a two-bay, two-storey gabled building (number 1), and a three-bay, two-storey building with a hipped roof (number 2).

The former railway station is a single-storey structure with a pitched roof, featuring corrugated iron overhangs over the canted frontage. Stone walls with coping stones and a central doorway connect the station to the railway platforms via brick links. Number 1 is a two-storey, two-bay building with a coped gable on both the east and north elevations. It features ashlar quoins and dressings, plain bands, and a moulded plat and cill band that extend around the cast iron downpipes, which have decorative brackets. The ground floor contains a framed door with diagonal planks and a transom light, and a pair of sash windows separated by a hollow moulded transom, all beneath hollow-moulded, four-centred arch heads with spandrels. The first floor has square-headed window openings, and an oriel window to the right, topped with a stone tile roof. Above the oriel window is a square recess containing a stone shield carved with the royal monogram VR. A first-floor sash window is present on the east elevation, alongside a tall lateral stone stack with a pair of octagonal shafts on the west. The rear elevation is plain.

Number 2 is a three-bay, two-storey building with a shallow hipped roof; the bay to the left is a rendered addition from the early 20th century. The ground floor has two pairs of four-light sash windows, and a single sash window to the right, at both ground and first floor levels, each with a heavy stone cill. The windows to the right are set within moulded stone surrounds. Both doorways have four-panelled doors; the left-hand door has a transom light, while the right-hand door is sheltered by a moulded stone canopy with console brackets. The first floor has timber bay windows, arranged 1:3:1, supported on wooden brackets. An outbuilding is attached to the rear elevation.

The interiors of the buildings have been modernised, though numbers 1 and 2 retain their mid-to-late 19th-century staircases and fire surrounds. The extension to number 2 incorporates Art Nouveau cast-iron fireplaces. The outbuilding to the rear of number 2 contains a late 19th-century toilet.