Penporthclais is a Grade II listed building in the Pembrokeshire Coast National Park local planning authority area, Wales. First listed on 28 July 1992. House.

Penporthclais

WRENN ID
heavy-facade-tarn
Grade
II
Local Planning Authority
Pembrokeshire Coast National Park
Constituency
Mid and South Pembrokeshire MP: Henry Tufnell (Lab)
Country
Wales
Date first listed
28 July 1992
Type
House
Address
Penporthclais, Porthclais, St. David's and the Cathedral Close
OS grid reference
SM 741 240
Coordinates
51.86909, -5.28219
Source
Cadw listing

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

Description

Penporthclais is a two-storey house made of colourwashed rubble stone, featuring a low-pitched grouted slate roof and rendered end stacks. The building has a low upper floor and is double fronted, with a central door flanked by a pair of large buttresses that support a slated porch roof. On the ground floor, there are small 9-pane sash windows on each side of the door, while the first floor has a pair of casement windows on the left and a single casement window on the right, all with painted slate sills.

To the south, there is a lower range attached to the main house, which has a large south end stack, a grouted roof, and a central door with a window on each side. This section features 20th-century glazing. The lower range to the north has a slate roof and two glazed doors.

Local climate

Penporthclais sits in a wetter-than-average part of the UK, with an average of 1,050 mm of rain a year. This makes it wetter than 85% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 96% of listed buildings.

It experiences an average of 3 freeze-thaw cycles a year, fewer than 99% of listed buildings. Of these, 1 follows 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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