No 1 with Warehouse Attached to Rear

No 1 with Warehouse attached to rear is a former house with a warehouse that was derelict at the time of inspection in August 1989. The house likely dates from the early 18th century and was remodeled in the 19th century, while the warehouse is from the early 19th century. The structure features coursed rubble, mostly rendered, with slate gable end roofs, some made of stone and some of Welsh slate, and a bit of brick patching. It stands three storeys tall.

The house faces Marlborough Street and appears to have been truncated, possibly losing one window bay in the 19th century. The warehouse faces the waterfront, with its main elevation almost flush against the end wall of the house, obscured by render. The exterior of the house has only two window openings on the first and second floors, which are original but blocked, featuring slightly projecting stone surrounds. The waterfront elevation shows the house's end wall with a central external stack that has a stone shaft, one window on each floor with raised surrounds and sashes with glazing bars, and another window between the ground and first floors indicating the position of the original stairs.

The warehouse has a regular five-window range with a loading bay, several surviving sashes, and planked doors to the loading bays, all with raised surrounds. There are external stairs to the first floor on the extreme right. Inside, the house has largely been remodeled in the 19th century, but an early 18th-century wooden cornice with cyma mouldings remains at the ground floor level. This cornice cuts across one corner of the room to accommodate a winder stair adjacent to the stack, although the stairs have been removed, leaving the curved shell visible throughout all three storeys. The warehouse contains a 19th-century staircase, and its floor is supported by tapering wooden columns of circular section. There is also a recent stone fireplace with bolection moulding, which is much defaced, on the second-floor end wall. This building occupies a prominent site close to the harbour and significantly contributes to the townscape.