The Lodge, Greenmount College, 22 Greenmount Road, Muckamore, Antrim, Co Antrim, BT41 4PX

The Lodge at Greenmount College is a two-storey building constructed in basalt rubble in a late Arts and Crafts style. The main entrance faces south.

The south elevation is asymmetrical, featuring a canted single-storey bay to the left of an off-centre doorway and a distinctive curved corner to the right that returns to the side elevation. The roof is laid in green Westmorland slates in diminishing courses with black ridge tiles, overhanging eaves with flat white-painted soffits, and cast iron gutters with cast iron downpipes. The walls are of roughly coursed basalt rubble with later reticulated pointing; tooled edges define the extremities and corners of window and door reveals. A raised sandstone platband runs at window head height across the ground floor, and a narrow projecting sandstone eaves course marks the first floor. Two chimneys of basalt rubble feature projecting sandstone stringcourses at their bases.

The canted bay is constructed of dressed sandstone on a low basalt rubble plinth with a low-pitched hipped roof of Westmorland green slates. Its windows are rectangular timber sliding sashes, 1 over 1 with horns, each with a sandstone keystone on both faces and projecting sandstone cills, with a moulded cast iron gutter.

The main entrance is a new rectangular timber 6-panel door with raised and fielded panels in a new unmoulded timber frame, set within a rusticated sandstone surround (partly trimmed in modern cement render) with a sandstone flat arch head recessed in an opening with basalt reveals and a basalt flat arch. A concrete doorstep is flanked by a pair of original sandstone plant tubs of simplified classical design in an Art Deco idiom; the tub to the right has been broken and bound together with wire. Above the entrance is a first-floor window—a rectangular timber sliding sash, 6 over 6 with horns and exposed sash boxes—set in a plain reveal with recessed cill and eaves soffit to the head. To the right of the entrance is a small rectangular metal 6-pane side-hung casement with recessed cill and sandstone platband to the head.

Set back slightly to the right-hand side of the south elevation, the end bay curves round to the east in a quadrant, symmetrically arranged about its central axis as the main exterior feature. This curved bay has a hipped roof with a chimney at its apex and one window to each floor. The first-floor window is a timber sliding sash, 6 over 6 with horns, plain reveals, and recessed cill, topped by a segmental-headed flat arch of basalt voussoirs. The ground-floor window is similar but with 3 over 6 lights and an angled head to the flat arch.

The west elevation comprises the west gable, two-storeys with two windows to each floor and walling consistent with the entrance front including platband. Two chimneys rise to the apex. First-floor windows are 8 over 8 sashes with horns, segmental-headed flat arches, and plain reveals. Ground-floor windows are tripartite: central lights are 6 over 6 sashes and sidelights are 2 over 2, all with angled heads to flat arches.

The rear elevation features three first-floor windows (two sashed 6 over 6 and one sashed 3 over 3) and two ground-floor windows (one sashed 6 over 6 with angled head to flat arch and one small metal 6-pane casement in plain basalt reveals). Roof, walls, and rainwater goods match those of the front elevation.

A single-storey rear return projects from the left-hand side with a hipped roof of pale green tinted tiles, basalt rubble walling with reticulated pointing, tooled edges to main corners, and a sandstone frieze returning from the main block's platband. It has overhanging eaves with flat white-painted sheeting, timber fascia, and cast iron gutters and downpipes.

The west side of the rear return contains what appear to be new openings (tooled edges to reveals are absent): a deeply recessed rectangular timber sashed window, 3 over 6 with horns in exposed sash boxes and lead-dressed cill board, and a deeply recessed doorway containing a pair of double glazed doors with small panes flanked by sidelights sashed 2 over 4, with lead-dressed cill boards. A concrete doorstep leads onto a modern concrete paved patio partly bounded by modern concrete brick walling. The north end of the rear return has a doorway containing a glazed modern flush timber door, deeply recessed in plain reveals with a rusted flat steel lintel; an old concrete doorstep leads to a small modern concrete flagged area bounded by modern concrete brick walls. The east side contains a deeply recessed glazed small-pane timber door flanked by coupled and tripled sliding sashed windows, each light 2 over 4 with horns and lead-covered cill boards. Tooled edges appear on reveals to the right-hand side and doorway, though the arrangement may not be original.

The east elevation of the main block projects slightly forward beyond the rear return and comprises a symmetrical end bay with the quadrant bay set back slightly to the left, curved to the front as previously described. This end bay has one window to each floor matching the curved quadrant, with small PVC waste pipes at the base.

The building stands detached within the grounds of an agricultural college, positioned near the nucleus comprising a 19th-century classical house with a basalt wing contemporary with this building and of complementary detailing. It is approached by a tarmac driveway leading to a tarmac car parking area to the east, and is otherwise surrounded by well-kept lawns and flower beds with mature trees beyond. Standing detached to the north, separated by a concrete paved passageway, is a later single-storey garage with a hipped roof of modern green-tinted tiles. The garage has a basalt rubble entrance front with wet-dashed walls to sides and rear, panelled sheet metal garage doors with rectangular timber small-paned fixed lights and vents, and ledged timber doors to sides and rear. It features cast iron gutters and downpipes, with a modern steel and timber car port attached to its north side and modern timber fencing beyond.