Pig Sty, Ty Bach and Associated Walls at Tynyllwyn is a Grade II listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 19 November 1998. Pig sty, ty bach.

Pig Sty, Ty Bach and Associated Walls at Tynyllwyn

WRENN ID
hollow-pillar-jackdaw
Grade
II
Local Planning Authority
Brecon Beacons National Park
Constituency
Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
Country
Wales
Date first listed
19 November 1998
Type
Pig sty, ty bach
Address
Pig Sty, Ty Bach and Associated Walls at Tynyllwyn, Partrishow, the Vale of Grwyney, Powys
OS grid reference
SO 280 223
Coordinates
51.89515, -3.04649
Source
Cadw listing

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

Description

The structure is a pig sty, along with associated walls, located at Tynyllwyn. It features a rectangular paved enclosure that is oriented east to west, with a projection on the southwest side. The enclosure is surrounded by rubble stone walls topped with stone-slab coping. There is a gateway in the west wall that leads to stone steps at the southwest corner. Inside the enclosure, there is a large stone drinking trough situated on the northwest side. At the eastern end of the enclosure, there is a lean-to pig sty with a stone tile roof, which includes a doorway in the west side wall that leads into a small walled pen. The projection on the southwest side contains a ty bach, which has a lintelled doorway and a pent roof made of stone tiles.

Local climate

Pig Sty, Ty Bach and Associated Walls at Tynyllwyn receives an average of 940 mm of rain a year. This makes it wetter than 72% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 65% of listed buildings.

It experiences an average of 49 freeze-thaw cycles a year, more than 90% of listed buildings. Of these, 25 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.

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Nearby listed buildings

  1. Lower Revetment including Steps and Bull Cot at Tynyllwyn Grade II 9 m
  2. Upper Revetment, Goose Cot and Stairs at Tynyllwyn Grade II 12 m
  3. Tynyllwyn Grade II* 21 m
  4. Cattle ramp, cobbled pavement and revetment at Tynyllwyn Grade II 29 m
  5. Byre at Tynyllwyn Grade II 33 m
  6. Barn at Tynyllwyn Grade II 39 m
  7. Hen house and attached wall at Tynyllwyn Grade II 47 m
  8. Stable at Tynyllwyn Grade II 50 m
  9. Cart Shed and Cider Mill at Tynyllwyn Grade II 82 m
  10. Churchyard cross at Church of St Issui, Partrishow Grade II* 205 m