Plasnewydd

Plasnewydd is a double-pile house dating to the 18th century, characterized by paired gables on its north and south elevations, flanking a narrow central entrance bay. The house has two storeys plus a basement which contains kitchens and service rooms. It is topped with slate roofs featuring projecting boarded eaves. The construction uses close studded timber framing over a random rubble plinth that incorporates the basement. An external stack of random rubble exists on the east side, though partially rebuilt in brick following a roof lowering; a brick stack is on the west side.

Originally large windows with transoms and ovolo mullions defined the fenestration, though most lights are now infilled. Later 19th-century casements are set beneath the transoms, some with lattice glazing. The front elevation displays two five-light windows in the upper storey, with two lights glazed on the left and one on the right. The lower storey mirrors this with two four-light windows on the left (three lights glazed) and a four-light window on the right (three lights glazed). The main roofline slopes gently over the entrance bay. The original planked front door is reinforced with iron studs and features a single wrought iron strap hinge with a fleur-de-lys finial. A random rubble west wall includes a single ground-level window. The south elevation features five-light windows in each bay of both upper and lower storeys; three lights are glazed to the left and four to the right. A 19th-century six-pane sash window has been inserted into the original opening in the lower storey's right window, while a four-pane sash is inserted into the frame to the left. A four-light window in the central stair passage has two glazed lights, above a later inserted window. The basement shows a 19th-century top-hung casement window inserted into an original doorway, a 19th-century five-light casement, a mid-20th-century iron frame window set within an original opening, and a planked door under a timber lintel at the southwest angle. A 20th-century lean-to extends from the east wall, with an infilled original four-light window positioned above it. An additional window was inserted into the basement on the east side in the mid-20th century.

The interior retains a symmetrical plan with timber framing forming square panels. The basement houses two kitchens and two service rooms, while the ground floor consists of two parlours and two service rooms, a stair passage with a porch, and four chambers on the first floor. A dog-leg staircase ascends to the roof space and descends to the basement. The first flight of stairs has thick balusters with slanted mouldings, while the subsequent flights—including the one to the basement—feature fret-cut balusters. The kitchens and parlours each have two chamfered cross-beams, while each first-floor chamber has a single cross-beam. The eastern kitchen retains original flagstones around the walls and features a large fireplace with a bressumer. Two ledged and battened doors with wrought iron hinges are found on the first floor.