Penarth House is a Grade II* listed building in the Powys local planning authority area, Wales. First listed on 18 July 1949. Bridge.

Penarth House

WRENN ID
lapsed-gargoyle-amber
Grade
II*
Local Planning Authority
Powys
Constituency
Montgomeryshire and Glyndwr MP: Steve Witherden (Lab)
Country
Wales
Date first listed
18 July 1949
Type
Bridge
Address
Penarth House, Newtown and Llanllwchaiarn, SY16 3AN
OS grid reference
SO 139 924
Coordinates
52.52315, -3.27
Source
Cadw listing

Also on this page: flood risk · radon risk · weather exposure · detailed attributes ↓

Description

Penarth House is a largely 18th-century timber-framed house, with evidence of earlier structural elements. The house is formed around a central hall, with symmetrical cross wings extending to the flanks. There is evidence of a medieval timber-framed cruck roof within the central hall, featuring a through purlin base cruck truss with elbow blades rising to a collar, forming a semicircular arch. Principals with V-struts rest on the collar to form the apex, and the front wall is lined with later stonework. The ceiling is framed in three ways, with stop-chamfered spine beams and run-out stops. A central stack was reworked in the 19th century; a hearth on the west side was removed, creating an entrance passage with a partitioned-off parlour constructed of brick. A later chimney was inserted into the parlour, featuring staggered dragon beams and double ogee moulded counterchanging ceilings. A close-studded partition between the hall and kitchen retains some possible medieval work, alongside a stone chimney with a plain mantel beam. An early 19th-century staircase is located in an outshot extension at the rear.

The central hall has a close-studded front with a four-light, small-paned mullioned window to the first floor on the right, and a further three-light window set between the studding to the left. A four-light mullion and transom window with small panes is located to the ground floor on the right, featuring ovolo mouldings. A later, possibly 19th-century, timber porch is located to the left, with a 19th-century panelled door.

The cross wings have herring-bone framing to jettied attics, with double ogee-moulded cambered bressumers on end brackets. Herring-bone framing extends to the jettied first storey, incorporating dragonbeams and angle brackets; similar jetties are present on the flanks. Three-light casement windows with small panes and ovolo mouldings are present. The ground floors have close studding and a plastered plinth, with three-light mullion and transom windows with small panes, also ovolo moulded. Later lean-to outshots have close studding to the front with small-paned cross windows, while lighter square framing is found on the flanks with brick plinths. An outshot to the right end functions as a modern entrance porch.

The house is roofed with steeply pitched modern slate, with bargeboards, and features 19th-century stone stacks with brick caps. At the rear of the west (parlour) cross wing, the first floor is jettied with a dragonbeam to the right and an angle bracket. A re-positioned beam replaces the left dragonbeam. The attic and first floor are herringbone framed, with a three-light casement window with small panes. At ground floor level, a broad two-light casement window with small panes is present.

A rear outshot to the hall is square framed, with a gabled dormer to the left featuring a small-paned cross window, and a 19th-century multi-paned stair window to the right. The rear of the east (kitchen) cross wing has close studding to the first floor, with two modern small-paned casements. A slated stone oven projection is present to the left, with lighter square framing adjoining; this elevation shows evidence of later repair.

Local climate

Penarth House sits in a wetter-than-average part of the UK, with an average of 1,010 mm of rain a year. This makes it wetter than 81% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 73% of listed buildings.

It experiences an average of 47 freeze-thaw cycles a year, more than 88% of listed buildings. Of these, 27 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.3°C per decade since 1991.

Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.

More on this building

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