Penycoed Mansion is a Grade II listed building in the Carmarthenshire local planning authority area, Wales. First listed on 11 June 2001. House. 4 related planning applications.

Penycoed Mansion

WRENN ID
former-marble-fern
Grade
II
Local Planning Authority
Carmarthenshire
Constituency
Caerfyrddin MP: Ann Davies (PC)
Country
Wales
Date first listed
11 June 2001
Type
House
Address
Penycoed Mansion, Carmarthen, St. Clears, SA33 4JR
OS grid reference
SN 271 182
Coordinates
51.83596, -4.51036
Source
Cadw listing

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

Description

Penycoed Mansion is an early 19th century house that was extensively altered around 1926. It is a large, nearly square building with walls of painted roughcast, incorporating stucco dressings. The roof is hipped and covered in slate, with truncated red brick stacks positioned behind the front range, along with various 20th century skylights. Windows throughout are 12-pane painted timber sash windows with painted slate sills and raised stucco surrounds.

The front of the house has five bays, featuring a plinth, a simple cornice between the floors, and a stucco band under the eaves. A projecting, enclosed porch is centrally located on the ground floor, with a door flanked by narrow 8-pane sidelights in simple stucco surrounds. The doors are painted timber, with a rectangular overlight above. Similar 8-pane sashes are found to the sides of the porch, which has a flat roof and a continuing cornice. This porch replaced a larger two-storey portico, which was removed around 1926, as evidenced in older photographs.

The right side of the house has four bays that mirror the front, with the same cornice and windows. A truncated red brick ridge stack sits to the left, behind the main front room. A narrower space separates the third and fourth bays. The left side features three windows on each floor, spaced further apart, with a former doorway to the right of the centre that has been altered into a 12-pane sash window. A 20th century lean-to extension has been added to the rear.

According to estate agent details, the house contains a central hallway with flanking stone columns – likely remnants of the original portico – a tessellated floor, and a staircase. Decorative stucco cornices are present. While the reception rooms have 20th century replacement ceilings and fireplaces, the original internal doors are believed to remain.

Local climate

Penycoed Mansion sits in one of the wettest parts of the UK, with an average of 1,250 mm of rain a year. This makes it wetter than 93% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 95% of listed buildings.

It experiences an average of 16 freeze-thaw cycles a year, fewer than 84% of listed buildings. Of these, 6 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 — 1 transaction since 2021
  • Related listed building consents — 4 applications
  • 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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