Hermiston Old Farm House, Edinburgh

Hermiston Old Farm House is a late 18th century, two-storey, three-bay T-plan farmhouse with a complex building history. It was extended by an advanced gabled bay to the east around 1830, possibly designed by William Burn. The structure is built from squared rubble sandstone with painted ashlar margins, while the wing features stugged, squared, and snecked sandstone with raised cills and quoins.

The south elevation, which is the main front, has a symmetrical three-bay layout with a central door. The doorcase is plain and features an entablature, leading to a four-panelled door topped by a four-light rectangular fanlight. The windows are symmetrically arranged. To the outer left is a gabled fourth bay with a base course, which includes two windows at the ground level and one window on the first floor. There is also a brick boundary wall to the outer left that encloses the kitchen yard and rear.

On the north elevation, there is a full-height bowed bay to the outer left, with three windows symmetrically arranged at both the ground and first floors. The main block is recessed to the right and is obscured by a single-storey L-plan kitchen and office projection. A full-height stair window is located in the outer bay of the main house, featuring fixed panes with border glazing. The first-floor bays to the right have symmetrically disposed windows, while there is a blocked window at the ground floor outer right.

The west elevation shows the gable of the main house to the outer right, with a window at ground left and a small attic window in the gablehead. The L-plan kitchen and office range is recessed to the left, consisting of two bays with a lower bay and stores advanced to the west at the outer left. There is a door at the outer right, a tripartite timber mullioned window to the left, and a single window in the lower bay, with a mutual skew and apex stack between the two blocks.

The east elevation features a window at the centre of the first floor and an off-centre plate-glass sash and case window to the right at ground level. The building has a 12-pane sash and case window, a grey slate roof, and ashlar coping to the skews. The stone ridge is from the early block, with lead flashings on the later block. There are coped sandstone apex stacks on the main house, a tall shouldered wallhead stack on the later wing, and octagonal cans, along with thack-stanes.