Ty Carwyn, including forecourt railings

Ty Carwyn is a former town house, now used as offices, featuring painted stucco and a slate hipped roof. The building is three storeys high and has a three-window façade with a full-height projecting bowed centre. The timber modillion cornice was renewed in the late 20th century. The front is symmetrical, with 4-pane horned sash windows on the first floor left and both outer windows of the second floor. The centre window on the second floor and the right window on the first floor are blank, while the centre window on the first floor has a Palladian tripartite sash with 4-12-4-pane glazing and a blind arch above the centre light. All windows were renewed in the later 20th century, with the middle sashes being curved. The ground floor centre also features a similar window.

To the right, there is a tall arched blank recess, with a similar arch on the left side that contains a 20th-century four-panel door, accessed by three stone steps, and a fanlight with radiating bars. The building has cast iron rainwater goods. The right end has two large rendered stacks flanking a tall, narrow, small-paned timber sash stair-light, which is arched-headed with interlacing glazing bars at the top and has a stone sill. There is a projecting rendered masonry block to full height on the left, which projects out as a pier on the right side of the main front, possibly a remnant of a demolished building. To the left of the stair window is a stepped buttress, also roughcast rendered. The stone coped plinth steps down towards the rear.

The rendered rear wall features a double 4-pane sash window at the centre of the first floor with a continuous stone sill, and two more widely spaced 4-pane timber sashes on the upper storey. The dwarf front wall is made of stucco with stone coping, supporting a cast iron railing similar to those at Penllwyn Park. The uprights have rounded spearhead finials and support two continuous horizontal bars, with alternating low vertical bars featuring spearheads between the horizontals. There is elaborate Gothic scrollwork flanking each head and the low intermediate spearheads.

Inside, the staircase has stick balusters with concealed treads, and there are six-panelled doors on the first floor, with the remainder replaced in the later 20th century. The ground floor hallway features decorative stucco arches with scrolled corbels at the arch-springs.