Plas Gwyn

Plas Gwyn is a Regency-style house, likely dating to the early 19th century, situated overlooking the sea. The main house is rectangular, with a service wing to the northeast. The south facade, featuring three windows, serves as the main entrance front. The west facade extends for six windows. The building is constructed of whitewashed rubble stone, originally roughcast, with low-pitched slate hipped roofs and deep, bracketed eaves. Rendered stacks rise from the roof. The exterior is characterized by 12-pane sashes to the first floor and 15-pane sashes to the ground floor, set within stone voussoirs and painted stone sills.

The south front is hipped with two ridge stacks. A projected central bay is topped by a pediment and features a fine iron, tented verandah on each side. The central bay has plain arched openings into the verandahs, and a ground-floor window with 15 panes. The verandahs are three-bay structures with pierced, flat, cast-iron piers of neo-classical design; the tented roofs are now felted, although they were probably originally metal-clad. The left verandah has 20th-century glazing, while the right features a French window.

The west-facing garden front is also hipped, with pediments over the slightly projected second and fifth bays. Ground-floor bow windows are curved and stuccoed, with pilasters, plain cornices, and parapets, each containing three 15-pane sashes. It is possible these bow windows were added later, as there is no visible evidence of earlier windows corresponding to their position in the stonework above.

The north end is hipped with a rendered ridge and east end stacks. A two-storey, three-window elevation is present, with a basement door to the right. To the left is a lower service wing, with a three-window north side, a ridge stack, a hipped east end, and an L-shaped south front that is largely obscured. The north side of the service wing features 12-pane sashes and a six-panel door with an overlight between the second and third windows. The east end has a single first-floor sash, and the south return is windowless. A 20th-century single-storey addition is situated in the angle between the main house's east side and the service wing's south front. Incorporated into the east side of the property is an original service-court gateway with an arched opening and a bellcote above. The bellcote has a small, stone, octagonal spirelet. A small hipped roof sits between the ends of the south and north sides on the east side of the main house, covering a tripartite first-floor sash that illuminates the staircase.

The interior largely retains good Regency-style features. A prominent arched entry leads to a spine hall, featuring half-glazed double doors and a fanlight with radiating bars and patterned, coloured glass margins. A niche is located to the left of the entry, and an arch is present at the end of the hall. The main rooms are located to the southwest, northwest, and north, with a staircase leading off to the east. The stair hall features a broad wooden staircase with a short return and a long top landing, with twisted, slim balusters and a moulded rail. The ceiling of the stair hall exhibits lozenge panelling divided by rope-moulded bands, as well as an ornate, oval acanthus and bead centrepiece. The three main rooms are characterized by similar, plain neo-classical pilastered fireplaces, each constructed using five different coloured marbles. Further interior details include six-panel doors, moulded cornices, ceiling borders, and panelled shutters. The north room is distinguished by an elliptical-arched recess at the east end, with plaster vaulting, panelled pilasters, and a moulded arch. The plasterwork in the main west rooms is not repeated in the bow windows.