Hillsborough Lodge, 14 Bailiesmills Road, Lisburn, County Down, BT27 6XJ

Hillsborough Lodge is a detached gable-fronted single-storey with attic stone former gate lodge, dated 1878, possibly designed by John Lanyon. The building is rectangular on plan, facing north and positioned opposite the southern entrance to Larchfield House on the south side of Bailiesmills Road. It is almost identical to the estate's other gate lodge and retains its Victorian character despite a modern rear extension.

The pitched natural slate roof features terracotta ridge-comb tiles and a large sandstone ashlar chimneystack with corbelled coping. Plain timber bargeboards flank the gables, with original moulded cast-iron rainwater goods attached to the timber fascia and overhanging eaves. The south pitch carries a gabled dormer with a single-pane timber sash window, while the east pitch has a modern flat-roofed dormer.

The external walls are constructed of random coursed cut stone with sandstone ashlar quoins and several sandstone bands. Window openings have segmental heads formed in stop-chamfered sandstone ashlar with sandstone hood mouldings, keystones, springer stones and splayed flush sills; the windows themselves are now uPVC. A carved stone tablet at the gable apex displays the Graham family crest in relief with the build date 1878 and the family motto "Memor Esto" (Be mindful).

The gabled front elevation is abutted by a single-storey three-sided canted bay window with a lead-lined roof and original moulded cast-iron rainwater goods to a moulded sandstone cornice. A single window opening at attic floor level is symmetrically positioned above the bay. A recessed open-sided corner entrance porch occupies the northwest corner, featuring a single polished stone column on a stepped plinth with stiff-leaf capital supporting moulded corbels and a chamfered stone lintel. The porch contains segmental-headed door openings on two walls, each with an original herring-bone timber sheeted door, opening onto a platform with encaustic tiles and two stone steps. The east elevation has two window openings, whilst the north elevation has a single window to the centre and a further door opening to the right, detailed as per the window openings and retaining its original door.

The building is set road-fronted on the south side of Bailiesmills Road. A rubblestone retaining wall with a small wrought iron gate provides access to a raised lawn to the west, with a low stone wall enclosing a garden to the east.

Hillsborough Lodge replaced an earlier small structure first appearing on the 1834 Ordnance Survey map at the southern entrance to Larchfield Estate, the seat of the Mussenden family, a local landowning and merchant elite. The original building is shown as oblong but was not recorded as a gate lodge until the 1859 edition of the Ordnance Survey maps. Around 1830 it was valued as part of the main estate comprising the house, associated farm buildings and a second gate lodge to the northwest. William Mussenden, occupant at that time, died in 1860 leaving the estate to Ogilvie B. Graham. Over the following decade, Graham made numerous changes to Larchfield. By 1862 the estate value had increased to £100 with expansion of the main house and extensive stables buildings. By 1879, both of Larchfield's gate lodges had been replaced. Hillsborough Lodge was constructed in 1878 alongside the nearly identical Lisburn Lodge, both on the sites of their predecessors and valued at £6 each. The lodge was captioned "Hillsborough Lodge" from the third edition Ordnance Survey maps (1900–01). It is believed that both lodges were designed by John Lanyon, whose father Charles Lanyon may have designed the extensions to Larchfield House before 1859. The attribution rests on the resemblance both lodges bear to Belfast Castle Lodge, which Lanyon designed.

A two-storey rear extension in grey brick was added circa 1970. A glass conservatory and modern garage have been added in more recent years. The lodge now serves as a private dwelling. The listing extends to the gate lodge, gates and walling.