Blaengwrthyd is a Grade II listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 22 June 2005. Farmhouse.

Blaengwrthyd

WRENN ID
brooding-tracery-moss
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
Farmhouse
Address
Blaengwrthyd, Llanilltyd, Glyn Tarell, Powys
OS grid reference
SN 971 266
Coordinates
51.92862, -3.49694
Source
Cadw listing

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

Description

Blaengwrthyd is a farmhouse constructed from rubble stone and topped with a slate roof. It stands one and a half storeys tall and features a four-window range of renewed 12-pane sash windows, with the upper windows breaking through the eaves and having flat tops. The doorway is located in the third bay and has a 20th-century door with timber lintels. An exceptionally large external chimney-breast is positioned at the left end, featuring several steps on the right side and two steps on the left. To the right of the chimney, there is a lean-to that may have served as a bread oven. Attached to the right is a large, ruinous lofted byre, which has five doors, oak lintels, and square dips along the eaves that indicate where former loft windows were located; the roof of this structure is entirely gone. The property is not available for inspection.

Local climate

Blaengwrthyd 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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  • 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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