Old Market Hall is a Grade I listed building in the Powys local planning authority area, Wales. First listed on 24 October 1950. House.
Old Market Hall
- WRENN ID
- dark-sill-auburn
- Grade
- I
- Local Planning Authority
- Powys
- Constituency
- Montgomeryshire and Glyndwr MP: Steve Witherden (Lab)
- Country
- Wales
- Date first listed
- 24 October 1950
- Type
- House
- Address
- Old Market Hall, Llanidloes, SY18 6BN
- OS grid reference
- SN 954 845
- Coordinates
- 52.44864, -3.54025
- Source
- Cadw listing
Description
The Old Market Hall is a 2-storey, 5-bay black and white building featuring an open ground floor, although the southern bay on the east side is enclosed. It has a slate roof topped with an octagonal cupola that has small glazed panes and a weathervane. The eaves overhang, which is cut back at the ends on the east side, complements the structure. The southern gable is made of rubble, while the northern gable is constructed from red brick. The building showcases close studded timberwork with deep middle rails and chamfered bressumers supported by segmental arched braces. The windows consist of small panes with protruding frames that extend to the eaves level; there are three fixed windows on the west side and one on the east side, with the remainder being horizontally sliding sashes. The east side previously featured a boarded loading door, indicating its historical use as a wool store on the upper floor.
At the southern end, there is a low cambered arch made of voussoirs, with a timber head on the inner side. The northern gable is built in Flemish bond brick and includes a toothed band above the first floor, which has 12-pane horned sashes with flush frames and cambered heads. Above the paired cambered openings on the ground floor, there is another band course with voussoirs. Notably, at the northwest corner, there is a stone that is said to be the location from which John Wesley preached in 1748, 1749, and 1764.
Inside, the upper floor features a largely renewed 5-bay roof, with one truss that was previously used to partition off the gaol at the southern end. The interior also includes stop-chamfered beams and a modern staircase.
Local climate
Old Market Hall sits in one of the wettest parts of the UK, with an average of 1,180 mm of rain a year. This makes it wetter than 90% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 82% of listed buildings.
It experiences an average of 53 freeze-thaw cycles a year, more than 94% of listed buildings. Of these, 32 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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