Garden Retaining Wall to Nos.11 & 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. House.

Garden Retaining Wall to Nos.11 & 12 The Postern

WRENN ID

graven-chimney-shade

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

House

Address

Garden Retaining Wall to Nos.11 & 12 The Postern, Powys

OS grid reference

SO 043 288

Coordinates

51.94975, -3.39264

Source

Cadw listing

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

Description

Local climate

Garden Retaining Wall to Nos.11 & 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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• ×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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Similar buildings

The closest matches to this building from all 493,000 UK listed buildings, by architecture, period and materials.

1. 1 Garden Retaining Walls & Railings to Nos.9 & 10 The Postern Grade II · Brecon Beacons National Park
2. 2 Garden Wall to No 21 Grade II* · South Holland
3. 3 Front Garden Walls of Nos 1-4 (consec) Grade II · Cardiff
4. 4 Garden Wall and Terrace (Between Nos 26 and 28) of No 123 Longwestgate Garden Wall and Terrace of No 123 Grade II · North Yorkshire
5. 5 Garden walls to rear of Nos 6-11 Westgate Hill Grade II · Pembrokeshire

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Nearby listed buildings

1. 11 The Postern Grade II 8 m
2. 12 The Postern Grade II 8 m
3. Garden Retaining Walls & Railings to Nos.9 & 10 The Postern Grade II 9 m
4. 8 The Postern, including Forecourt Wall and Railings Grade II 16 m
5. Postern House Grade II 17 m
6. 7 The Postern, including Forecourt Wall and Railings Grade II 20 m
7. 6 The Postern, including Forecourt Wall and Railings Grade II 24 m
8. Ely House Grade II 24 m
9. 5 The Postern, including Forecourt Wall and Railings Grade II 27 m
10. Castle House Grade II 33 m