Castledale and York House including forecourt railings and gates

Castledale and York House are a pair of townhouses built in a heavy classicising style, currently used as offices and attached on one side. The walls are rendered with stucco, and the slate roof features four cambered-headed dormers with casement windows. A tall, narrow chimney stack is positioned at the division of the two houses. The buildings stand three storeys high with a basement and have a six-window range, with three windows per house, all featuring bracketed sills.

The second-floor windows are 4-pane sashes set in reveals, while the first floor has tall French windows. The inner French windows (two on each house) open onto balconies with ornamental cast-iron handrails supported by brackets. The ground floor windows and doors have semi-circular heads, with a moulded string carried over the window and door heads and between the windows, which are bracketed at the impost level. A moulded string cornice at the first floor level is supported by enriched console brackets, with a similar eaves cornice featuring brackets spaced in pairs.

The forecourt is enclosed by railings topped with spear finials, with gates on each side and gate-piers capped with pyramidal stones. Nosed stone steps lead up to each door and down to the basement. At the rear, only York House retains its sash windows with glazing bars.

Inside, the staircases rise parallel to the frontage behind the front ground floor room, featuring stick balusters and a turned newel post. Some panelled shutters and reveals have been retained, along with 4-panelled doors.