Rhiwlas is a Grade II listed building in the Isle of Anglesey local planning authority area, Wales. First listed on 13 July 2005. House.
Rhiwlas
- WRENN ID
- hallowed-gable-vetch
- Grade
- II
- Local Planning Authority
- Isle of Anglesey
- Constituency
- Ynys Môn MP: Llinos Medi (PC)
- Country
- Wales
- Date first listed
- 13 July 2005
- Type
- House
- Address
- Rhiwlas, 28 Castle Street, Beaumaris
- OS grid reference
- SH 605 760
- Coordinates
- 53.26333, -4.09212
- Source
- Cadw listing
Description
Rhiwlas is a 3½-storey house built in the late-Georgian style. It features whitened roughcast walls, with the lower storey smooth-rendered, and a slate roof that has a roughcast stack on the left side. The openings of the house have rendered architraves and banding. In the lower storey, there is a replacement 3-light window and a round-headed entrance on the right side, which includes a keystone. The entrance has a fielded-panel door and an overlight that are recessed.
The middle storey showcases a 4-pane oriel sash window supported by Tuscan pilasters. The upper storey contains two 9-pane hornless sash windows. On the left gable end, there is a replacement attic window, while the right gable end features two small 12-pane sash windows. The rear of the house has a mix of sash and replacement windows. The property has not been inspected.
Local climate
Rhiwlas sits in one of the wettest parts of the UK, with an average of 1,210 mm of rain a year. This makes it wetter than 92% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 90% of listed buildings.
It experiences an average of 37 freeze-thaw cycles a year, more than 67% of listed buildings. Of these, 19 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
Matched applications, energy data and sale records are assembled automatically and may contain errors. Flag incorrect data.
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