Berthlwyd is a Grade II listed building in the Merthyr Tydfil local planning authority area, Wales. First listed on 20 February 2003. Farmhouse.

Berthlwyd

WRENN ID
quiet-paling-cream
Grade
II
Local Planning Authority
Merthyr Tydfil
Constituency
Merthyr Tydfil and Aberdare MP: Gerald Jones (Lab)
Country
Wales
Date first listed
20 February 2003
Type
Farmhouse
Address
Berthlwyd, Quakers Yard, Treharris, CF46 5BS
OS grid reference
ST 097 960
Coordinates
51.6561, -3.30569
Source
Cadw listing

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

Description

Berthlwyd is a farmhouse featuring a long front range, rendered with 20th-century uPVC windows and imitation slates. It has three chimneys and an added crosswing to the left. The layout includes one bay between the crosswing and the first chimney, two bays between the first and second chimneys, and one bay between the end chimneys. There is a lower outbuilding to the right. The first bay of the main house has a 20th-century porch in the angle that obscures a ground floor window. The crosswing has a painted rubble stone front with a later 19th-century paired window on each floor to the left, featuring stone surrounds and 20th-century glazing. The rendered end gable has a chimney.

To the left of the crosswing, there is a cowshed and barn with an asbestos sheet roof. The rear center of the house has a lean-to that was formerly a dairy. The outbuilding on the right also has an asbestos sheet roof, with outside steps on the left leading to a loft door below the sill. The door head breaks the eaves. On the ground floor to the right, there is a small square window with a stone shelf above and a stable door with two stubs of timber above for a presumed pent roof. There is a straight joint to the right and an added section with a small loft window and a second stable door with an iron lintel. Outside steps are present on the end wall.

The interior is not accessible, but it is said to retain 17th-century beams.

Local climate

Berthlwyd sits in a wetter-than-average part of the UK, with an average of 1,160 mm of rain a year. This makes it wetter than 89% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 83% of listed buildings.

It experiences an average of 43 freeze-thaw cycles a year, more than 85% of listed buildings. Of these, 22 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
  • Sale history — 3 transactions since 2001
  • 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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  4. Treharris Public Library Grade II 902 m
  5. Tabernacle Independent Chapel. Grade II 973 m
  6. Quakers Yard Railway Viaduct Grade II* 1.0 km
  7. Trelewis War Memorial Grade II 1.2 km
  8. Handball Court Grade II 1.6 km
  9. War Memorial Grade II 1.6 km
  10. Llancaiach-fawr Grade I 1.7 km