1 Abercorn Terrace, Edinburgh

1 Abercorn Terrace is a house in Edinburgh, dated 1870, with later alterations and additions. It is a two-storey, three-bay structure featuring a lower wing to the southeast that is set back, with first-floor windows that break the eaves. The front and northwest elevation are finished in stugged ashlar with polished ashlar dressings, while the rear southeast elevation is constructed from squared and snecked sandstone, including a modern lean-to addition made of reconstituted stone with a sunroom to the right. The building has a base course and a moulded string course between the ground and first floor, as well as gabled dormerheads and stop-chamfered arrises on the principal windows.

On the northeast elevation facing Abercorn Terrace, there is a central two-leaf panelled door with brass fittings, set within a key-stoned, consoled, and corniced doorpiece, with a window above on the first floor. To the left, there is a tripartite window at ground level and a window above on the first floor. The bay to the right features a full-height, gabled canted window. A screen wall with a boarded door is located to the left, while the southeast addition includes a window on the first floor that breaks the eaves and an inset dormer to the right.

The northwest elevation, facing St Mark's Place, has two gabled bays, with the left bay slightly advanced. There is a window on each floor of the outer left bay, and a window at ground level. The outer right bay has a window on the first floor. Between the bays, there is a gabled corbelled window angled to the west on the first floor.

The southwest elevation features a modern addition in the center. There is a bipartite window at ground level and a gabled window breaking the eaves in the left bay on the first floor. The right bay contains a modern sunroom with a window breaking the eaves and a gable above on the first floor. The southeast addition is aligned with the rear of the house.

The house has 12-pane and plate glass sash and case windows, a slate roof, and gablehead ashlar stacks on the side elevations. The interior was not seen in 1995.

The boundary walls consist of rubble with rounded coping, and there is a polished ashlar gateway featuring a shouldered stop-chamfered opening for a panelled door. The cornice has a semicircular pediment at the center, which is carved with the date and name "The Manse 1870."