Plas yn Rhiw

Plas yn Rhiw is a country house, dating from the 17th century with later alterations, constructed of rubble stone, originally roughcast, and featuring a low-pitched slate roof with deep eaves, bracketed gable verges, and stone end stacks with stepped caps. The main front is a three-storey, T-plan composition with a three-window facade, displaying 16-pane sash windows above two French windows and a central half-glazed door. A ground floor veranda, supported by thin iron columns, extends across the front, and a wrought iron gate is located at the north end. The veranda is finished with slate paving and slab lintels. A date "1634 I.L." is carved above the right-hand ground floor window, although this is likely a 19th-century replacement for an earlier stone marking. The south end wall shows the clear outline of a 17th-century roofline and tall end stack. A 17th-century slot stair-light is found on the first floor left, with a 12-pane horned sash to the upper floor right, a 16-pane horizontal-sliding casement to the first floor right, and a 9-pane fixed light replacing a 17th-century slot window on the ground floor left. The west rear wall has a similar 17th-century slot window to the right at mid-height, alongside 9-pane windows on each floor to the left. The rear wing’s south side features a 12-pane horizontal-sliding casement under the eaves, a 16-pane sash on the first floor, and a small window and a 4-pane window on the ground floor. The end gable has a stone stack, an 18-pane long stair light to the left, and a 16-pane sash below. A mid-19th century kitchen wing projects slightly from the north-west angle, with a stone end stack and a window on each floor to the west gable. The north front has a two-window range of 16-pane sashes, with the ground floor left sash replaced by a door with overlight. The north end of the main house also shows evidence of an earlier roofline and stack. The upper window is 9-pane, with 12-pane sashes on the main floors to the left, and a door to the right on each floor, with stone steps providing access to the upper door.

The ground floor has been stripped of plaster and panelling. To the right of the main entrance, remnants of a Regency screen remain, featuring a pair of shallow elliptical plaster arches; however, the original timber columns and responds have been replaced by rustic posts with three surviving crude Ionic capitals. Original shutters are still present in some areas. A small fireplace, stripped of its fittings, is located at the north end of the ground floor. On the south end, a 17th-century heavy chamfered beam and half-beam, along with a timber lintel over a large fireplace and a recess to the right, indicating a former spiral staircase (of which only the bottom flight remains). A “Gothick” door is positioned opposite the main front door, featuring glazed intersecting tracery and blank trefoils in the spandrels. The rear wing contains a staircase aligned with the front door, with the lower flight rebuilt in stone in the mid-20th century. Early 19th-century six-panel doors lead to the cellar and office to the left, with a kitchen to the right containing a fireplace with a stone lintel. An early 19th-century return flight of stairs features stick balusters and scrolled tread ends. The first floor reveals a 17th-century spiral stone staircase in the southwest angle, with narrow glazed loops, a deep recess with a stone seat in the southeast angle, chamfered beams (one grooved for a partition), and scribed joists. A blocked window is present on the rear wall, along with six-panel early 19th-century doors. The upper flights of stairs incorporate reused Jacobean splat balusters as newels.