Blackheath House, 112 Killeague Road, Garvagh, Coleraine, Co. Londonderry, BT51 4HH

Blackheath House is a symmetrical three-bay, two-and-a-half-storey country house built around 1790 to designs by Michael Shanahan. It stands on the east side of Killeague Road south of Coleraine, set on a mature plot accessed via a gravel drive with circular painted rubble stone piers topped with pointed caps.

The building has a rectangular plan with a single-storey projecting porch to the northwest. A pitched natural slate roof with blue and black angled ridge tiles covers the main structure, with raised masonry verges and ruled-and-lined rendered chimneystacks to the gables, each carrying six tall clay pots. Cast-iron ogee rainwater goods are mounted on timber fascia boards.

The walls are rendered in painted smooth finish. The principal northwest elevation is three openings wide at each floor, with 6/6 timber sash windows featuring horns and projecting painted sills at the principal elevation (diminished at first floor). Modern timber windows serve the basement and all other elevations. The ground-floor centre has a projecting porch with round-headed replacement timber casement windows to left and right cheek in rectangular recesses. The entrance comprises a raised-and-fielded four-panel timber door with brass furniture, surmounted by a radial timber fanlight and flanked by pilaster jambs with moulded imposts, archivolt and vermiculated keystone. The porch is accessed via a single sandstone step and flanked by replacement cast-iron railings on a plinth wall enclosing the basement. The basement channel is now partially roofed.

The northeast elevation has three windows at attic level (that to the right is a 4/1 sash and lower) and a window to the first floor right. A gabled single-storey-over-basement modern extension abuts the ground floor right, with an adjoining flat-roof modern addition to the basement at left. The southeast rear elevation is five evenly-spaced windows wide at each floor; the exposed basement has four windows and is abutted at right by a modern flat-roof garage. The southwest gable has three windows at attic; the ground floor is fully abutted by a large single-storey modern extension with a conservatory entrance opening to the northwest.

The setting includes modern single-storey extensions to the northeast and southwest, and a modern garage to the rear. A small yard to the southwest of the house is enclosed by painted rubblestone walls with circular lime-washed gate piers having conical caps and supporting cast-iron gates. To the north side of the yard is a single-storey modified outbuilding with a bell-cote and bell to the northwest gable, fully refurbished and now incorporated into the main house. Outbuildings have been refurbished while retaining traditional appearance with slate roofs, lime-washed walls and timber-sheeted openings. A gravelled parking area to the front of the house features a shrubbed turning circle, with views of surrounding countryside to the southeast.