11 & 12 Edenduff Terrace, Antrim, Co Antrim, BT41 4NF

11 & 12 Edenduff Terrace is a house formed from two mid-Victorian terrace cottages that have been combined into a single dwelling. It is one of a group of five terrace blocks, each originally comprising four similar single cottages, built by the O'Neill family as workers' housing on the Shane's Castle estate. The row first appears on the Ordnance Survey map of 1902 and is tentatively dated to the 1860s. The building has lost some original features, particularly the lattice glazing to the front windows, but retains sufficient character as part of the larger terrace group to merit protection.

The building is constructed of basalt rubble with roughly squared quoins to the right-hand gable. The entrance elevation faces south and is now six bays wide, reflecting the combination of the two former cottages. The roof is of Bangor blue slates in regular courses with dark-toned ridge tiles. Two chimneys rise from the elevation: one at the left-hand extremity, shared with the adjacent house to the left, and another on the right-hand gable, both constructed of red brick with projecting blue-black brick cornices of three courses, surmounted by a blocking course of red brick and topped with two pots.

The front openings feature rectangular timber sliding sash windows, 1 over 1 with horns, painted white with exposed sash boxes also painted white and projecting tinted concrete cills. The original lattice glazing has been replaced. Red brick flat arches to the head and block dressings to the openings are partly obscured by later cement reveals and raised surrounds. A projecting brick eaves course runs across the elevation, with a metal gutter and metal downpipe to the left-hand side set into a cast iron pipe at the base. Lime mortar pointing is used to the masonry.

The former cottage No 11 to the left has a doorway containing a rectangular sheeted timber door surmounted by a plain rectangular fanlight in a moulded timber frame, with rendered block bases to the frame. The former cottage No 12 to the right, which now functions as the main entrance, has a similar doorway with the addition of a metal letterbox. Black PVC vertical trunking for cables is positioned to the right of the left-hand doorway.

The east elevation is a blank gable of basalt rubble, mostly obscured by rough lime mortar, with a projecting rendered plinth to the base. The chimney breast, flush with the wall, has been rebuilt in basalt rubble. Overhanging eaves feature painted panelled soffits and timber barge boards.

The rear elevation consists of the main front block of the two former cottages treated as one unit, with a long new return to the right-hand side; the building is single storey with attics throughout. The front block retains a slated roof similar to the entrance front, with three modern rooflights and a part of the roof swept down to form an open porch with tongued and grooved sheeting to the soffit and gable, supported on an angled timber strut. The wall follows the pattern of the entrance front, with new segmental arched red brick block surrounds to the doorway and windows. Windows are rectangular timber fixed lights with top-hung vents and projecting concrete cills. The door is a new rectangular sheeted timber door with a glazed panel. The rear return is of basalt rubble with a natural slated roof and similar window detailing.

Nos 11 and 12 were combined into one dwelling in 1983, and a rear extension was added circa 1992.

The building stands at one end of the terrace block and faces the main road, set slightly back from it with a tarmac access road immediately in front, separated from the main road by kerbstones. Facing the terrace row is the heavily wooded demesne of Shane's Castle, bounded by a basalt rubble wall. The surrounding area consists of agricultural land. A gravelled driveway runs along the gable of No 12 between it and the adjacent block to the east, leading to a large tarmac area bounded to the north by a detached basalt rubble garage currently under construction, with a rear garden beyond.