121 Greencastle Pier Road, Kilkeel, Newry, Co Down, BT34 4LR

121 Greencastle Pier Road is the right-hand house of a symmetrical pair of two-storey, three-bay semi-detached lighthouse keepers' houses, positioned at the end of Greencastle Pier Road on the north side, with the main elevation facing south towards the sea.

The principal roof is pitched natural slate with clay ridges. The right gable is coped with moulded kneelers. Two painted rendered chimneys serve the building: one on the wall between the second and third bays carries two pots, while the one on the party wall with the adjacent house has four pots. Decorative cast iron ogee rainwater goods with ornamental hoppers are supported by a decorative eaves course comprising three courses of yellow brick, the middle one saw-toothed. Circular downpipes are secured by poppy head clasps. The walls are painted smooth cement render with a painted chamfered basecourse. All windows have painted granite cills.

A single-storey porch projects from the central bay of the facade. It has a pitched natural slate roof with a raised gable and matching rainwater details to the main block. The porch gable contains a 6/6 sliding sash window with horns. The left cheek is blank but render marks indicate an infilled doorway; the right cheek features a sheeted powder-coated aluminium door with a modern electric light above.

On the ground floor left and right of the porch are single 6/6 sliding sash windows with horns, repeated at first floor in line with the ground floor openings. The right gable contains a single narrow 4/4 sliding sash window positioned to the right on each floor. The wall continues rightward as the left cheek of a two-storey rear extension.

The rear elevation is abutted to the left by a two-storey extension and at centre and right by a single-storey lean-to. The remaining original rear wall at first floor level has a single brick course forming the eaves, painted and rendered, with a single 6/6 sliding sash window centred at first floor.

The modern two-storey return has a hipped artificial slate roof tied into the main roof but with a lower ridge. Its walls are painted smooth render with a single course of yellow brick forming the eaves and an additional eaves board supporting half-round gutters. The basecourse matches the main block. A single-storey outshot with a similar roof abuts the rear gable, featuring a pair of plastic double-glazed patio doors on its rear wall. Above the outshot is a top-hung plastic double-glazed window. The left cheek of the two-storey return has a modern 4x2 paned fixed window with a narrow concrete cill; its right cheek is abutted by the lean-to gable and is blank. The left cheek of the outshot is blank.

The lean-to to the rear of the main block has a pitched natural slate roof projecting flush with the end of the two-storey extension. Its main wall is abutted by a similar lean-to extension, creating a central valley. The latter has a painted rendered back wall and is enclosed by a yard without external access.

A single-storey outbuilding stands to the rear of the yard, with a monopitched artificial slate roof sloping to the yard and raised coped verges with decorative kneelers. The walls are painted coursed random Silurian rubble with granite quoins. The external wall to the north has a brick-dressed doorway infilled with concrete blocks and two small infilled vent openings above.

The front is paved and enclosed by an embattled mass concrete wall with a shared vehicular gateway. The gate is wrought iron, held by a pair of rock-faced ashlar piers with pyramidal granite caps.