Alcorn House, Highlands Road, Clagan, Limavady, Co Londonderry, BT49 9L?

Alcorn House is a double-pile house built between 1900 and 1919 in Clagan, near Limavady, County Londonderry. It is a square, double-pile house with a projecting porch facing east onto a farmyard. While initially appearing well-proportioned, the interior spaces are cramped and lack classical proportions. The house has been derelict since the mid-1970s and is in a poor state of repair.

The front (east) elevation features three nine-pane sash windows with segmental heads on the first floor, and two twelve-pane sash windows on the ground floor, one flanking each side of the porch. The porch itself has a pitched roof with glazed walls and a low cill. The main roof is a hipped roof with a valley centred on the facade. A brick chimney is located on the north side of the valley, along the line of the front wall.

The north elevation has a similar window arrangement: three segmental nine-pane sash windows on the first floor, and three windows on the ground floor (two twelve-pane sashes, and one smaller six-pane sash). The west (rear) elevation features irregularly distributed windows, including two twelve-pane sash windows at first floor and a ground-floor door. A brick chimney is visible against the external wall, centrally placed on the northern pile, with another on the south elevation. The south elevation features a centrally placed segmental nine-pane sash window on the first floor, with a casement window below and a smaller casement window immediately west of it.

The walls are rendered with white sand cement. The roof is covered in natural slates. The house was first shown on a map dating from 1909 and was formerly the home of the Alcorn family. The original entrance was likely on the north facade, suggesting a more conventional layout with reception rooms on either side of an entrance hall and kitchens to the rear.