The Great House including attached Cowhouse is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 29 April 1993. House.

The Great House including attached Cowhouse

WRENN ID
ghost-stone-foxglove
Grade
II
Local Planning Authority
Powys
Constituency
Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
Country
Wales
Date first listed
29 April 1993
Type
House
Address
The Great House including attached Cowhouse, Llanfihangel-Nant-Melan, New Radnor
OS grid reference
SO 180 581
Coordinates
52.2152, -3.20132
Source
Cadw listing

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

Description

The Great House, which includes an attached cowhouse, dates back to the 15th century and has undergone later alterations and extensions. It features a T-plan design with one and a half storeys. The central section has a single-pile range with two large roof dormers, while a wing is located at the west end and the cowhouse is attached at the east end. The building is constructed of random rubble and is topped with an overall slate roof. There are brick stacks on the left end of the house and at the front gable end of the wing. The windows are 19th-century cross-pattern with large-pane casements, and there is a modern conservatory porch.

The structure incorporates remnants of a late medieval open hall-house, with two complete cruck-truss uppers and a cut-down portion of another truss visible in the roof space. These trusses are large and heavily smoke-blackened, likely framing the two bays of the hall. The original cruck building was later subdivided, featuring scroll-stopped ceiling beams and a large rubble stack that may have been inserted into a cross-passage. A rough rubble wall now blocks the former space at the south end of the stack, which once led into the lower end bay. From the outside of this blocking wall, visible in the cowhouse, one can see exposed chamfered and stopped ceiling joists and part of a chamfered and stopped bressumer beam. Below this beam, there is a large oak door frame with chamfer and mason's mitre jointing. This early door frame appears to be associated with the insertion of the rubble stack and possibly the rebuilding of the house walls in stone, as it lacks mortices on the sides. The room it once led to has been obscured by the construction of the present cowhouse, which is of much later date and incorporates various re-used ceiling and roof timbers. The upper end bay of the cruck house was rebuilt as a cross-wing, featuring scroll-stop beams and some exposed joists of a rougher character. The gable end fireplace had the date 1716 carved on it until recent years.

Local climate

The Great House including attached Cowhouse receives an average of 940 mm of rain a year. This makes it wetter than 72% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 58% of listed buildings.

It experiences an average of 51 freeze-thaw cycles a year, more than 93% of listed buildings. Of these, 30 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
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  • Radon risk assessment
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