Barns at Ty Mawr is a Grade II listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 22 June 2005. Barn. 1 related planning application.
Barns at Ty Mawr
- WRENN ID
- vast-basalt-reed
- Grade
- II
- Local Planning Authority
- Brecon Beacons National Park
- Constituency
- Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
- Country
- Wales
- Date first listed
- 22 June 2005
- Type
- Barn
- Address
- Barns at Ty Mawr, Glyn Tarell, Powys, LD3 8NH
- OS grid reference
- SN 977 234
- Coordinates
- 51.90043, -3.48714
- Source
- Cadw listing
Description
The barns at Ty Mawr are a complex of buildings, likely dating to the 18th century. They are constructed of rubble stone with slate roofs. The main barn features two tall entrances with pentice roofs supported by renewed oak brackets. An eroded date plaque suggests an 18th-century origin. Square vent openings are positioned at two levels between the doors, with additional openings at each level on the outer sides of the doorways. A straight joint indicates an addition to the right, which incorporates a cambered-headed entry with stone voussoirs and a loft window set beneath the eaves. An attached range, set at a right angle, has a brick-headed door on its side wall and openings on both floors of its end wall. A rear elevation of the barn contains two opposing doors, while the north gable has a large loft opening with an oak lintel and a lean-to addition.
Inside the barn, the structure is characterised by large tie-beam and collar trusses incorporating angled struts. The door lintels and rafters have been renewed.
Local climate
Barns at Ty Mawr sits in one of the wettest parts of the UK, with an average of 1,330 mm of rain a year. This makes it wetter than 96% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 86% of listed buildings.
It experiences an average of 55 freeze-thaw cycles a year, more than 95% 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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- Full EPC report — heating system, energy costs, size, glazing, construction etc.
- Sale history — 2 transactions since 2002
- Related listed building consents — 1 application
- 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
Matched applications, energy data and sale records are assembled automatically and may contain errors. Flag incorrect data.
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