30 Greenmount Road, Muckamore, Antrim, BT41 4PX

30 Greenmount Road is a 1½ and 2-storey house of asymmetrical plan built in basalt rubble with sandstone dressings and steep-pitched hipped roofs. The main entrance faces south.

The south elevation features a roof of Westmorland green slates in diminishing courses, with flat soffits to overhanging eaves finished with a timber eaves board, PVC gutter and downpipe. The basalt rubble walls have tooled edges to the corners at the extremities and to the corners of reveals to openings. A raised sandstone platband runs at first floor cill level. A central chimney of roughly coursed basalt rubble with tooled edges to corners and a plain block cornice rises prominently. Two windows on the first floor consist of coupled rectangular timber 6-pane side-hung casements with the eaves soffit continuing to their head. One window on the ground floor is similarly detailed to the first floor casements, with a timber drip board, recessed cill, and flat arch to the head. All windows throughout the house are modern replacements. The entrance is a rectangular timber stained and varnished glazed and panelled door recessed in plain reveals with an angled top to the flat arched head, set above a concrete doorstep.

Extending to the right-hand side and set well back from the main wall is a lower 1½ storey block, with most of the ground floor behind a curved screen wall that encloses a small yard. The screen wall is of similar basalt to the main house with sandstone block coping aligned with the stringcourse to the east elevation. The west side of the yard wall contains a semi-elliptical archway with a rectangular ledged and braced timber door. The yard surface is concrete, and the inner yard walls are basalt rubble.

The south elevation of the house within the yard shows basalt rubble walling with a sandstone stringcourse. Four square ventilation openings at the top of the wall presumably serve an original drying room in the loft above. Two recessed doorways are present: a rectangular ledged timber door to the right set in a flat basalt arch, and a modern rectangular flush timber glazed door to the left set in a tongued and grooved sheeted screen within a segmental headed basalt flat arch. The elevation is finished with a PVC gutter and downpipe.

The west elevation displays roof, walling, and rainwater goods consistent with the entrance front. One window appears on each floor: a double casement on the first floor matching those on the entrance front, and a small rectangular timber 4-pane top-hung window on the ground floor with a timber drip board in a flat arch.

The north elevation is similar to the west, with the addition of a PVC soil pipe. Two windows to each floor are present, featuring double casements as seen on the entrance front. Set back to the left-hand side is the lower 1½ storey block, with roof, rainwater goods, and walling comparable to the main block. Four small square ventilation openings appear at the top of the wall. One window on the ground floor consists of a double casement with the head formed by a projecting sandstone stringcourse. A gravelled area to the corner between the blocks contains an oil tank, partly screened by a modern wooden fence.

The east elevation comprises the main 2-storey block with hipped roof, with the lower 1½ storey block projecting forward centrally. The 1½ storey block features one centrally positioned window of rectangular timber coupled 4-pane casements, deeply recessed with rusticated sandstone block dressings to the reveals, sandstone cill, and rusticated flat arched sandstone head extending to each side to form a stringcourse. Below the cill is a shallow recessed panel of basalt stonework with tooled edges to the reveals but rough finish to the ledge below. A modern flush rooflight sits in the roof above, and a television aerial is mounted on the chimney.

The building stands in a rural area on a corner site, facing onto an entrance road to an agricultural college. Directly opposite is a similar but not identical house built at the same time as part of an overall architectural composition. The property is approached by a short pedestrian path and vehicular driveway off the entrance road. A tarmac path crosses the main entrance with a tarmac area to the west, while lawns occupy the rear and east sides, with well-kept flower beds. The front and east boundary is formed by a black stained timber fence containing an original wrought iron pedestrian gate of geometrical design on iron posts and a pair of modern iron vehicular gates on steel posts serving the driveway.