Edenderry House, 133 Ballylesson Road, Edenderry, Belfast, County Antrim, BT8 8JU

Edenderry House is a symmetrical two-storey, three-bay Georgian country house built around 1734, with an L-shaped plan and additional single-storey rear returns. The outbuildings adjoin to form a courtyard with origins dating as early as around 1650. The house is situated at the end of a long driveway off Ballylesson Road, south-west of the ancient monument The Giants Ring and west of Drumbo Parish Church.

The roof is pitched natural slate with clay ridge tiles, gable ended with clipped verge, and a leaded ridge over the bay extension. Cast-iron rainwater goods include semi-circular cast-iron guttering fixed to plain corbelled eaves with circular down pipes on the front building and ogee moulded gutter to the single-storey rear. Simple chimneystacks are located on the main block at the gable apex on either side, with five plain clay pots. Smaller chimneystacks on the rear buildings feature moulded cornice details and pairs of tall octagonal pots. The roof has been subject to slate and tile repairs.

The walling is ruled-and-lined rendered in natural finish. Windows are primarily timber sliding sash with stone cills, with varying fenestration patterns throughout. Timber doors have moulded stone architrave, painted white.

The principal elevation faces south and is symmetrically arranged. Centrally located is a two-storey canted bay with double-glazed doors at ground floor with a 12-paned fixed light over, flanked by full-length 9/4 sliding sash windows with horns. At first-floor level, above a continuous cill course, are 3/6 sliding sash windows with horns, flanked by a pair of 2/4 sliding sash windows. The side bays have Georgian 6/6 sliding sash windows at ground floor with 3/6 sliding sash above, without horns. The left gable has no openings.

The north elevation is abutted by a one-and-a-half-storey L-shaped return projecting northwards to the right-hand side. The west elevation is asymmetrically arranged with the principal entrance located on the right-hand side—a wide Georgian 6-panel timber door, painted white, with cast-iron ironmongery and moulded stone architraves. To the right is a Georgian 6/6 timber sliding box sash window, with a matching pair to the left of the door. At the far left is a smaller 3/6 Georgian sliding box sash window. The chimneystack is located left of centre along the ridge line. A further subservient return projects eastwards from the far left bay with lower eaves and ridge levels, forming part of the courtyard enclosure. This includes a pair of double doors installed during Victorian alterations, replacing windows.

The north elevation of the return is primarily the gable end of the one-and-a-half-storey section, asymmetrically arranged. Right of centre is a single-storey gabled porch with a modern timber door. Windows vary between timber side-hung and sliding sash of various sizes and proportions. The gable rises to projecting plain barge boards. To the left is a single-storey lean-to shed attached to the building via a wall with doorway.

The east elevation is asymmetrically arranged with a timber door located left of centre and a 3/6 sliding box sash window to the left. To the right are two matching windows. Modern roof lights are located at the far right over the attic. Evidence of former three-storey rear accommodation exists. The right gable has a single 3/6 Georgian sliding sash window located right of centre at first-floor level. This is extended to the return by a large 18-paned half-circle arched opening into the stairwell, with a smaller 3/6 sliding box sash located below at ground-floor level.

The dwelling is situated at the end of a long driveway off Ballylesson Road. On approach is a modern dwelling located on the left-hand side prior to reaching the courtyard enclosed by outbuildings. To the north of the site is woodland rising to a hilltop. The surrounding land comprises largely open fields bordered by vegetation, forming part of the estate. Towards the east, the spire of the neighbouring Drumbo Parish Church is visible.