Gwyndy is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 25 October 1951. A Victorian House.

Gwyndy

WRENN ID
pitched-bailey-myrtle
Grade
II
Local Planning Authority
Powys
Constituency
Montgomeryshire and Glyndwr MP: Steve Witherden (Lab)
Country
Wales
Date first listed
25 October 1951
Type
House
Period
Victorian
Address
Gwyndy, Llanfyllin, SY22 5BN
OS grid reference
SJ 141 194
Coordinates
52.76565, -3.27423
Source
Cadw listing

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

Description

Gwyndy is a two-storey house featuring four windows and a slate roof, with rectangular brick chimneys. The windows are sixteen-pane hornless sashes set within moulded architraves. The third bay includes a later 19th-century semi-hexagonal bay that has horned sash windows on both floors. The entrance doorway is located between the first and second bays, framed by a simple early 19th-century doorcase with Doric pilasters and a cornice above. The right gable end has a window in the apex and a small stained glass window at the first-floor level. On the ground floor to the left, there is another entrance doorway with an early 19th-century pedimented doorcase. The angle at the rear of the house is jettied, featuring a broadly-proportioned first-floor window and a small ground-floor window with casement glazing. At the rear, there is a wing constructed of rubble with brick dressings and a yellow brick chimney; the gable end facing the garden has a broad modern window on the first floor and two camber-headed windows with modern glazing. An early 20th-century bathroom extension and a glazed outshut are situated between the house and the wing.

Inside, the interior has been remodelled in the later 19th century, but the timber-framed construction is still visible through heavy stop-chamfered beams, some of which are exposed while others are plastered. There are also exposed timbers, particularly in the northwest section of the house, where the attic is supported by a chamfered beam with brackets that feature chip-carved enrichment, similar to those found at Old White Lion and The Hall.

Local climate

Gwyndy sits in a wetter-than-average part of the UK, with an average of 960 mm of rain a year. This makes it wetter than 75% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 61% of listed buildings.

It experiences an average of 45 freeze-thaw cycles a year, more than 86% of listed buildings. Of these, 25 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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  • 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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