Derllys Court is a Grade II listed building in the Carmarthenshire local planning authority area, Wales. First listed on 8 July 2002. House.

Derllys Court

WRENN ID
old-parapet-auburn
Grade
II
Local Planning Authority
Carmarthenshire
Constituency
Caerfyrddin MP: Ann Davies (PC)
Country
Wales
Date first listed
8 July 2002
Type
House
Address
Derllys Court, Merthyr, Carmarthen, Newchurch and Merthyr
OS grid reference
SN 355 201
Coordinates
51.85555, -4.38963
Source
Cadw listing

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

Description

Derllys Court is a house from the early 19th century, constructed of stucco with a close-eaved slate roof and red brick end stacks. It stands three storeys high and features a three-window arrangement of 4-pane sash windows, with the upper windows being square. The centre of the façade has a six-panel door set within a lean-to rendered porch. There is also a lean-to on the left end wall that includes a door at the front. At the rear, there is an outshut and two parallel two-storey rear ranges, each with four windows, which are linked to the northeast corner of the original house. The rear is made of whitewashed rubble with brick heads above the windows. The property has not been inspected.

Local climate

Derllys Court sits in one of the wettest parts of the UK, with an average of 1,230 mm of rain a year. This makes it wetter than 92% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 92% of listed buildings.

It experiences an average of 29 freeze-thaw cycles a year, fewer than 68% of listed buildings. Of these, 13 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
  • No sale records on file
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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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