Portis is a Grade II listed building in the Carmarthenshire local planning authority area, Wales. First listed on 9 April 2003. House. 1 related planning application.

Portis

WRENN ID
lesser-slate-hazel
Grade
II
Local Planning Authority
Carmarthenshire
Constituency
Caerfyrddin MP: Ann Davies (PC)
Country
Wales
Date first listed
9 April 2003
Type
House
Address
Portis, Llanfynydd, SA32 7TG
OS grid reference
SN 558 274
Coordinates
51.9268, -4.0981
Source
Cadw listing

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

Description

Portis is a 2-storey, 5-bay house featuring pebble-dashed walls that are painted white on the front elevation. It has a slate roof and a large external chimney stack on the right gable end, which includes a bread oven. The central boarded door has glazed panels. The windows are late 19th century horned sashes. On the lower storey, there are two 9-pane windows on either side of the doorway, while the upper storey has three 4-pane windows that are evenly spaced. At the rear, there is a central stair light, and to the left of this is a small lean-to.

Local climate

Portis sits in one of the wettest parts of the UK, with an average of 1,350 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 94% of listed buildings.

It experiences an average of 35 freeze-thaw cycles a year, more than 56% of listed buildings. Of these, 16 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 — 1 transaction since 2016
  • 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
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  4. Church of St Egwad Grade II* 174 m
  5. Penylan House Grade II 1.8 km
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  7. Ornamental bridge in grounds of Pantglas Grade II 2.0 km
  8. Former entrance tower to Pantglas, including attached remains of house. Grade II 2.0 km
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  10. Ynyswen Grade II 4.1 km