58 Harbour Road, Carnlough, Ballymena, Co Antrim, BT44 0EU

58 Harbour Road is a two-storey, three-bay terraced house dating from between 1840 and 1859, forming part of a terrace of six houses. It stands at the north end of the terrace within the built-up area of Carnlough village, facing the main road with an unobstructed view across it to the harbour. The building was formerly known as the 'Harbour Mistresses' House' and appears on the Ordnance Survey map of 1857.

The front elevation faces east and features a roof of Bangor blue slates laid in regular courses with two chimneys—one to each extremity, the left one smooth rendered and the right one of red and yellow polychrome brickwork with modern pots. The wall is smooth rendered, lined and blocked, with a dentil course at the eaves, a moulded stringcourse at first-floor cill level, moulded surrounds to the windows, and raised quoins at the extremities. A projecting moulded plinth runs across the base. Windows are rectangular timber sliding sash, 1 over 1 with horns. A central single-storey rectangular porch with smooth rendered walls and plain projecting eaves courses projects from the front, topped with a flat roof. The porch openings are chamfered and contain modern rectangular timber fixed lights, top-hung vents, and a ledged timber door, with a PVC downpipe descending from a concealed gutter. A small enclosure bounded by smooth rendered walls and a modern iron gate with cement screed ground surface extends across the front of the house.

The end gable is rendered with a dry dash of crushed limestone chippings and mixed pebbles, with raised smooth rendered quoins at the extremities, smooth rendered plinth and stringcourses. One ground-floor window matches those on the front elevation but sits in raised surrounds; two smaller similar windows light the attic.

The rear elevation is two-storey with a roof of Bangor blue slates in regular courses contained by cement gable coping to the left. One flush rooflight pierces the roof, and two chimneys rise from the ridge—a smooth rendered example to the right-hand extremity and a red and yellow brick chimney to the left, both with terracotta pots. PVC gutters and downpipes service the elevation. Walls are dry-dashed with pebbles and chippings, with painted quoins to the left-hand extremity and painted cement surrounds to openings and similar borders to a shallow central projecting flat-roofed two-storey extension containing a first-floor bathroom and ground-floor toilet. The rear elevation is three windows wide at first-floor level, the central one sitting within the projecting extension. These are timber sliding sash windows, vertically hung, 6 over 6 with horns, containing translucent glass, positioned above ground-floor windows of timber fixed lights with top-hung vents. Similar fixed lights and vents flank the bathroom outshot on the first floor and the right-hand side at ground level. All windows have painted stone cills. A single-storey flat-roofed return with a flush door extends to the left-hand side, featuring similar pebble-dashed walls connected by a similar pebble-dashed overhead beam to a lean-to building in the yard. Along the south side of the yard stands a two-storey gabled and slated outbuilding with finishes matching the main house, fitted with ledged wooden doors and a fixed light window. The yard boundary walls to the north and west are finished with pebble dash.

The building is located within a conservation area.