Outbuilding at 23 Mullagh Road, Trillick, Omagh, Co Tyrone BT78 3TN

A detached multi-bay two-storey outbuilding built around 1850, located to the west side of Mullagh Road at the entrance to a farm. The building is rectangular in plan, though it appears as single-storey at first-floor level to the rear due to the slope of the site.

The roof is pitched natural slate with blue and black clay ridge tiles sitting over brick corbelled eaves. The walls are constructed of random rubble with fieldstone quoins, while the gables are roughcast rendered. Windows are metal casements with stone lintels, and cast-iron rainwater goods are fitted.

The principal south elevation is divided into two sections by a change in stonework marked by quoins. On the left, a segmental rebated carriage arch with rubble voussoirs and brick rebate is flanked on each side by vertically-sheeted timber half-doors. Above this sits a large opening, now blocked, with a sandstone sill at first-floor level. On the right, another segmental rebated carriage arch with rubble voussoirs is flanked by a vertically-sheeted timber door, with a single window above at first-floor level.

The west gable is blank and is abutted at ground floor by a rubble outbuilding with flat corrugated metal roof, built into the topography of the site. The north elevation is accessed only at first-floor level and contains a square-headed opening with timber lintel holding a vertically-sheeted timber door flanked by a window; concrete block walling appears below. At the centre, a vertically-sheeted timber half-door is supported by a timber lintel. The east gable is blank.

The building is set perpendicular to the road and is bounded to the road by rendered walling. To the east stands a three-bay two-storey rendered farmhouse, with a range of rendered outbuildings and recent barns and farm stores to the south.

The outbuilding first appears on the second edition Ordnance Survey map of 1852. Further outbuildings present to the west on the 1833 map appear to have survived. The Townland Valuation records a house and offices occupied by James Alexander valued at £3 13 shillings. Griffith's Valuation records the site as a house, offices and land occupied by Susan Bird, leased from Captain Archdall, with building valuation initially £3 15 shillings, later revised to £4 at an unrecorded date, possibly relating to the addition of this outbuilding. Valuation Revisions show changes in occupancy among the Alexander family and later to William Henderson in 1883.