Octagonal building at Lower Neuadd Reservoir is a Grade II listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 28 July 2005. Reservoir building.
Octagonal building at Lower Neuadd Reservoir
- WRENN ID
- gaunt-sentry-crimson
- Grade
- II
- Local Planning Authority
- Brecon Beacons National Park
- Constituency
- Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
- Country
- Wales
- Date first listed
- 28 July 2005
- Type
- Reservoir building
- Address
- Octagonal building at Lower Neuadd Reservoir, Llanfrynach, Powys
- OS grid reference
- SO 031 179
- Coordinates
- 51.85198, -3.40801
- Source
- Cadw listing
Description
The octagonal building at Lower Neuadd Reservoir is a reservoir structure made of rock-faced squared stone with a cemented roof. It features a square tower with chamfered corners, a corbelled parapet, and a recessed octagonal roof over the central chimney. The building is constructed from pink stone, with some sandstone ashlar elements, and consists of two storeys.
The front of the building has a large arched doorway that is blocked, featuring pink stone voussoirs. On the first floor, there is a 3-light ashlar mullioned window, and the parapet above has a small raised shouldered pediment positioned over the window. The right side of the building includes a blocked 3-light mullioned window below and a blocked roundel above. The coping of the parapet is stepped up.
The building is not available for inspection.
Local climate
Octagonal building at Lower Neuadd Reservoir 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
Sign in or create a free account to unlock:
- 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
Matched applications, energy data and sale records are assembled automatically and may contain errors. Flag incorrect data.
Similar buildings
The closest matches to this building from all 493,000 UK listed buildings, by architecture, period and materials.
this building 1 similar nearby listed buildings