Plas Offa is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 16 December 2005. Villa.

Plas Offa

WRENN ID
lunar-bonework-curlew
Grade
II
Local Planning Authority
Powys
Constituency
Montgomeryshire and Glyndwr MP: Steve Witherden (Lab)
Country
Wales
Date first listed
16 December 2005
Type
Villa
Address
Plas Offa, Montgomery, SY15 6QJ
OS grid reference
SO 224 969
Coordinates
52.56471, -3.14502
Source
Cadw listing

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

Description

Plas Offa is a detached villa built from tooled squared sandstone, featuring a slate hipped roof with deep eaves supported by brackets that have finials. The building has two square stone chimneys, with the right chimney being taller. It stands two storeys high and has three bays. On the first floor, there are 4-pane horned sash windows set in ashlar chamfered surrounds. The ground floor features outer canted bay windows that have hipped slate roofs adorned with fishscale banding, and a similar roof covers the central porch. These roofs are supported by brackets with turned pendants. The ashlar canted bays have bases made of ashlar with sunk panels beneath each window. The central hipped roof is supported by pierced cast-iron uprights that display anthemion patterns. The entrance includes a four-panel door with an overlight in a chamfered surround, flanked by narrow sidelights with small panels beneath. The left end wall has two windows that match the eaves and windows of the front, with a French window in the right opening of the ground floor. At the rear, there is an outshut with three small sash windows above a modern conservatory. The interior has not been inspected.

Local climate

Plas Offa 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
  • Sale history — 5 transactions since 1997
  • 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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  6. Former Gaol Gatehouse (Oakfield Lodge and The Gaol House) Grade II 61 m
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  9. No. 2 Black Hall Cottage Grade II 194 m
  10. Manor House Grade II 196 m