Kilcoan House, 16 Millbay Road, Kilcoan More, Islandmagee, Larne, Co Antrim, BT40 3RG

Kilcoan House is a two-storey gabled roughcast house with a single storey wing, built between 1840 and 1859 in a vernacular Georgian style. The house stands on a level site in a rural location at Islandmagee, sited in a garden on a bend of the road which allows views from various directions. The wing to the north appears on the Ordnance Survey map of 1832, though the house itself does not appear until the 1857 map. The house was built by Arthur Hill.

The east-facing entrance front is four windows wide. The walls are roughcast using crushed stones and painted white. The roof is of Bangor blue slates in regular courses between gable copings. Two chimneys, one on each gable, are finished as walls with two plain black pots each; these are replacements.

The front door is a wooden four-panelled replacement set between narrow pilasters with sunk panels in a segmental-headed recess. Above it is a fanlight with radial glazing bars containing six panes of clear glass, each inscribed with a letter of the name Kilcoan (new, circa 1989; the panes were originally coloured). The reveals are smooth rendered. Cast iron guttering and downpipes run along the eaves.

The ground floor has two windows to the left of the door and one to the right. The first floor has four windows. All windows on the main elevation are timber sliding sash, vertically hung, with horns. Ground floor windows are 6 over 6, first floor windows are 6 over 3; these are replacements to the original pattern. The painted cills are probably concrete replacements.

A single storey return extends to the right hand side of the house, level with the rear wall, continuing at lower ridge height to a long wing. The return has one timber sliding sash window lighting the kitchen. The wing has three windows lighting a new dining room. The south gable walling matches the front facade and is blank except for one upper window, with a television satellite dish mounted above it.

The rear elevation has three first floor windows and one upper window at the half-landing of the stairs. The ground floor has one window to the left, a 6 over 6 timber sliding sash, and to the right a French window comprising a doorway and two sidelights, each with 15 small panes; these replace two small original windows.

A gabled rear return projects to the left with a half-door of 6 panes to the upper leaf over a ledged timber lower leaf. One window to the left of this door matches the upper windows on the rear elevation of the house. The roofline of this return has an almost flat pitch out from the rear wall, then pitches down, which is not an original profile. The west elevation of the return has two small 6 over 3 windows.

The wing extending from the return has a rectangular opening with a large sliding garage door to the left hand side and a small top-hung window of 9 panes. Both the south gable of the wing and the south gable of the main house are blank.

To the west of the rear return and wing stands a long single storey slated gabled and whitewashed outbuilding.

The entrance gateway to the front comprises a pair of whitewashed rubble stone circular piers with conical caps and a pair of flat-iron gates with scrolling finials; this is a new main entrance through a former gateway to a front field. Nearby to the south-east is an earlier entrance gateway with square harled stone and brick piers with ornamentally treated iron gates.

The listing excludes the rear return and wing to the north.