The Old House is a Grade II listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 20 June 1995. House.

The Old House

WRENN ID
south-tower-hyssop
Grade
II
Local Planning Authority
Brecon Beacons National Park
Constituency
Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
Country
Wales
Date first listed
20 June 1995
Type
House
Address
The Old House, Hay Common, Llanigon, Powys
OS grid reference
SO 232 380
Coordinates
52.0357, -3.12057
Source
Cadw listing

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

Description

The Old House is a 17th-century stone building with a stone-slate roof, featuring one storey and semi-attics. The rear of the roof has roof-lights, and the central chimney has been rebuilt in stone. The lower windows have modern oak frames, and there is a modern oak door in a partly blocked opening. Older windows are found under timber lintels, which are chamfered to the hall, and there are stone labels on the front. Some of these windows have been partly restored and are deeply splayed internally, with one window built into the cross-passage doorway. A lean-to structure made of stone and stone-slate is also present. The footings are notably slabby, especially at the southern end.

Inside, the hall features a plain intermediate truss with only a chamfered tiebeam. The stout purlins are mostly original, and the fireplace has a plastered finish with a deep timber lintel. The dais has a partition made of chamfered oak planks and muntins, with two of the three tiers being original and displaying good carpenter's marks. The ceiling beams have pyramidal stop-chamfers. There is a stout door-frame by the chimney, and the lower end has ceiling beams with angled stop-chamfers. Above, the upper part of a cruck truss is embedded at the back of the chimney and is of poor quality, featuring a collar and yoke. The roof consists of three bays, with collars and tiebeams that have been sawn off, while the purlins are largely original. There is a small fireplace in the northern gable with splayed jambs and an arch cut into the tiebeam. One framed partition remains fairly complete.

Local climate

The Old House 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 50 freeze-thaw cycles a year, more than 91% of listed buildings. Of these, 27 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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