Maesllwch Castle is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 18 January 1996. Bridge. 6 related planning applications.
Maesllwch Castle
- WRENN ID
- grey-cobble-fog
- Grade
- II
- Local Planning Authority
- Powys
- Constituency
- Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
- Country
- Wales
- Date first listed
- 18 January 1996
- Type
- Bridge
- Address
- Maesllwch Castle, Glasbury, HR3 5LQ
- OS grid reference
- SO 173 403
- Coordinates
- 52.05494, -3.20745
- Source
- Cadw listing
Description
Maesllwch Castle features an impressive facade set on a rock-faced stone terrace that encloses a lawn. The castle is constructed from squared and coursed rock-faced sandstone, topped with slated and leaded roofs, which are mostly concealed behind crenellated parapets supported by arcaded brackets. The remaining eastern tower, which was once part of the dining room, is an unequal octagon with three storeys, featuring various cross windows with label mouldings and paned glazing. There are string courses above the splayed plinths of the towers and above the first floor.
The work completed in 1872 is marked by a stone of a slightly redder hue and includes a two-storey square gun tower overlooking the southern terrace, which has an attached corner stair-tower that transitions from square to octagonal. This tower is divided by string courses into four storeys and has a bracketed parapet. The western front, which overlooks the rose garden where the main part of the house once stood, features canted bays from 1951, along with some exposed brick construction.
On the northern side, the tallest tower above the octagonal northern entrance has been demolished, but the tall circular inner tower with its deep bracketed and crenellated parapet remains. To the left, there is a projecting arch-headed porch and a square tower. The stable yard ranges are primarily single storey, accented by two-storey crenellated towers that have similar arcaded corbel tables and mid-wall strings. These structures feature stone cross windows with label hoods set in rusticated stone walls. An arched gate tower with square corner turrets is located at the centre of the eastern side, leading to the forecourt. On the western side of the forecourt, gate piers and elaborate iron gates have been relocated from the original main entrance in Glasbury village.
Little remains of the original fine interiors.
Local climate
Maesllwch Castle receives an average of 950 mm of rain a year. This makes it wetter than 74% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 58% 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.
More on this building
Sign in or create a free account to unlock:
- Full EPC report — heating system, energy costs, size, glazing, construction etc.
- No sale records on file
- Related listed building consents — 6 applications
- 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