Cwmhir Abbey is a Grade II* listed building in the Powys local planning authority area, Wales. First listed on 12 December 1952. Abbey.
Cwmhir Abbey
- WRENN ID
- steep-rubble-starling
- Grade
- II*
- Local Planning Authority
- Powys
- Constituency
- Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
- Country
- Wales
- Date first listed
- 12 December 1952
- Type
- Abbey
- OS grid reference
- SO 055 711
- Coordinates
- 52.3299, -3.38699
- Source
- Cadw listing
Description
Cwmhir Abbey is a significant site featuring the ruins of an abbey, which include rubble-stone walls of the nave and part of the crossing. The south wall stands higher, reaching up to 5 meters, and includes two Early English wall shafts. The north wall is mostly preserved where it supports the bank, with two higher sections of rubble-stone core and the base of a single wall shaft. Inside the nave, the bases of three arcade piers can be seen, along with the bases of two western crossing piers and the wall between them. In front of this wall, there is a modern memorial to Llywelyn ap Gruffydd. The walls of the western transept are in a similar condition to those of the nave, and the north transept retains the bases of wall shafts.
Local climate
Cwmhir Abbey sits in a wetter-than-average part of the UK, with an average of 1,090 mm of rain a year. This makes it wetter than 87% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 78% of listed buildings.
It experiences an average of 51 freeze-thaw cycles a year, more than 92% of listed buildings. Of these, 29 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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- 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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Nearby listed buildings
- Home Farmhouse
- Gate piers, gates and attached walls at entrance to The Hall
- Tympanum in garden wall at Home Farm
- NE farm range at Home Farm
- SW farm range at Home Farm
- NW farm range at Home Farm
- Telephone Call-box at entrance to Home Farm
- The Hall
- Happy Union Inn
- Footbridge & attached walls and gateway on the SE side of Abbey Cwmhir churchyard