Pen-y-llan is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 20 March 1998. House.
Pen-y-llan
- WRENN ID
- peeling-footing-cobweb
- Grade
- II
- Local Planning Authority
- Powys
- Constituency
- Montgomeryshire and Glyndwr MP: Steve Witherden (Lab)
- Country
- Wales
- Date first listed
- 20 March 1998
- Type
- House
- Address
- Pen-y-llan, Forden, Forden with Leighton and Trelystan
- OS grid reference
- SJ 224 019
- Coordinates
- 52.6095, -3.14645
- Source
- Cadw listing
Description
Pen-y-llan is a building featuring a ground floor constructed of brick and an upper floor made of square-panel timber framing, topped with a slate roof. The brick on the lower floor likely replaces original stone. The timber framing consists of three panels high with long straight tension braces, and the top panel may have been added when the roof pitch was lowered. The building has boarded doors with lean-to canopies and timber windows with panes, some of which were replaced in the 1990s to match the original design. There is one small gabled dormer on the front and three on the rear. It includes a four-flue brick stack and a two-flue gable stack, both made of brick.
Inside, there are back-to-back fireplaces in the hall and parlour, featuring twin chamfered spine beams. The hall fireplace contains a bread oven. The service room in the third bay has a gable stack and a single ogee-stopped spine beam, along with an additional oven beside the fireplace, which has been altered. The staircase is located in the outshut behind the main stack.
Local climate
Pen-y-llan receives an average of 860 mm of rain a year. This makes it wetter than 61% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 55% of listed buildings.
It experiences an average of 45 freeze-thaw cycles a year, more than 86% of listed buildings. Of these, 24 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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- No EPC on record for this property
- No sale records on file
- No related consent applications matched
- Detailed attributes — period, style, materials, features
- Flood risk assessment
- Radon risk assessment
- Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
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