Trefasser Isaf is a Grade II listed building in the Pembrokeshire Coast National Park local planning authority area, Wales. First listed on 14 July 1993. Farmhouse.
Trefasser Isaf
- WRENN ID
- drifting-pier-russet
- Grade
- II
- Local Planning Authority
- Pembrokeshire Coast National Park
- Constituency
- Ceredigion Preseli MP: Ben Lake (PC)
- Country
- Wales
- Date first listed
- 14 July 1993
- Type
- Farmhouse
- Address
- Trefasser Isaf, Llanwnda, Pencaer
- OS grid reference
- SM 896 379
- Coordinates
- 51.99974, -5.06628
- Source
- Cadw listing
Description
Trefasser Isaf is an earlier 19th-century farmhouse constructed from rubble stone, featuring a grouted slate roof and stone end wall stacks, with the larger stack located at the south end. The building is two stories high and has a three-window range with 12-pane horned sashes, which are set with painted slate sills and red brick cambered heads. The central entrance has a 20th-century door that also has a similar cambered head. An inscription reading "1869 JáSáRees" is incised on the stone by the doorway. The north end wall is whitewashed, and there is a rear outshut with an imitation slate roof. To the right of the farmhouse, there is an attached outbuilding that features a long outshut roof at the front and two doors at the rear.
Additionally, there is a single-storey outside kitchen positioned at right angles to the southwest of the farmhouse. This kitchen is also built of rubble stone, has a grouted slate roof, and stone end stacks. It includes one window to the left of the center and a door in the east end wall. A rubble wall to the right of the kitchen has a low opening, which may have served as a goose shelter.
The garden surrounding the property is enclosed by a whitewashed rubble stone wall.
Local climate
Trefasser Isaf sits in a wetter-than-average part of the UK, with an average of 1,120 mm of rain a year. This makes it wetter than 88% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 97% of listed buildings.
It experiences an average of 5 freeze-thaw cycles a year, fewer than 97% of listed buildings. Of these, 2 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
- 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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