Former entrance tower to Pantglas, including attached remains of house.

The building is the former entrance tower to Pantglas, which includes the attached remains of a house. It is an Italianate four-storey tower featuring a two-storey portico set back on its left side. The structure is made of dressed masonry with roughcast walls. The lower storey of the tower is constructed with rusticated masonry and has round-headed doorways on the front and right sides. The second storey features a recessed segmental-headed window framed by rusticated quoin strips. Above this, the rendered third storey displays a blind balustrade and a keyed oculus situated between rusticated quoins. A broad panel separates the third and upper storeys. The upper storey is adorned with triple keyed round-headed windows, where the central window contains a two-pane sash window while the outer windows are blind. Consoles support pedestals on the balustraded parapet above.

The two-bay portico is supported by Tuscan columns, with paired columns in the centre, and features a balustrade on the upper storey. The lower storey windows in the passage are framed with Doric architraves. To the left, there is a freestanding column that is part of the original porch. On the right side of the tower, there is a roughcast single-window wall.