Williamston House including area railings

Williamston House is a terraced house dating from the 19th century, featuring unpainted stucco with a slate roof and rendered end stacks. The building has a large, three-storey front with five windows, set back behind area railings. There are two broad bands between the floors, and each floor has hornless 12-pane windows in moulded architraves. The ground floor includes a through-passage door in the left end bay and a main door in the center. Access to the main door is via four stone steps leading up to a fine Roman Doric doorcase, which has half columns, entablature blocks with fluted friezes and guttae, and an open pediment with mutules. The blind fanlight above the door features a moulded arch with radiating tracery, and the 6-panel door is recessed, with four fielded panels over two flush panels. Footscrapers are present, and there are four steps leading up to the 6-panel door to the through-passage, consisting of one sandstone step and three with slate treads. The basement vents are covered by slate hatches on either side of the main door.

The area railings are made of fine wrought iron and flank the doorway, featuring spearheads and scrolled supports to the stanchions, which have cast-iron urn finials. The railings turn in to flank the center doorway and the right side of the left end door, with a painted stucco plinth and hinged gate sections in each length. A large three-storey rear wing extends to the southeast, and there is a detached two-storey outbuilding to the southwest, with a narrow court between.

Inside, the entrance hall boasts a moulded egg-and-dart cornice with a scroll frieze, and a hall arch with a panelled soffit and undercut leaf moulding on broad piers. There are six-panel doors on each side of the hall. The stair hall features a similar cornice and also has six-panel doors on each side. The staircase consists of four flights with a continuous rambed thin handrail, square balusters, and scrolled tread ends, with the handrail scrolled at the foot and a moulded cornice at the top of the stair. On the first floor, there are similar doors, and the front room has a moulded cornice with oval motifs in the piers. The doors and shutters have bordered sunk panels, similar to those at Foley House, except on the top floor where the doors are panelled but lack the border strips in the panels. The ground floor front rooms and the first-floor west room were not inspected.