12 The Postern is a Grade II listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 16 December 1976. Cottage. 1 related planning application.

12 The Postern

WRENN ID
haunted-quoin-claret
Grade
II
Local Planning Authority
Brecon Beacons National Park
Constituency
Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
Country
Wales
Date first listed
16 December 1976
Type
Cottage
Address
12 The Postern, Powys, LD3 9DF
OS grid reference
SO 043 288
Coordinates
51.94977, -3.39275
Source
Cadw listing

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

Description

12 The Postern is a two-storey cottage that forms part of a pair with No. 11. It features one window bay and an inner doorway. The cottage has a slate roof and brick chimneys at both ends. The front is cement rendered, and it has small modern two-light wood casements set in original cambered headed openings. The doorways are fitted with half-glazed modern doors. There is also a one-storey extension to No. 12.

Local climate

12 The Postern sits in one of the wettest parts of the UK, with an average of 1,260 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 82% of listed buildings.

It experiences an average of 56 freeze-thaw cycles a year, more than 96% of listed buildings. Of these, 32 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 2009
  • 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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  1. 11 The Postern Grade II 4 m
  2. Garden Retaining Wall to Nos.11 & 12 The Postern Grade II 8 m
  3. Garden Retaining Walls & Railings to Nos.9 & 10 The Postern Grade II 13 m
  4. 8 The Postern, including Forecourt Wall and Railings Grade II 18 m
  5. Ely House Grade II 19 m
  6. 7 The Postern, including Forecourt Wall and Railings Grade II 21 m
  7. Postern House Grade II 24 m
  8. 6 The Postern, including Forecourt Wall and Railings Grade II 25 m
  9. 5 The Postern, including Forecourt Wall and Railings Grade II 28 m
  10. Castle House Grade II 30 m