Penbryn Mawr is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 21 July 2000. House.
Penbryn Mawr
- WRENN ID
- moated-chapel-scarlet
- Grade
- II
- Local Planning Authority
- Gwynedd
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 21 July 2000
- Type
- House
- Address
- Penbryn Mawr, Penygroes, Caernarfon, Llanllyfni
- OS grid reference
- SH 459 538
- Coordinates
- 53.06006, -4.29982
- Source
- Cadw listing
Description
Penbryn Mawr is a two-storey building constructed of roughly coursed rubblestone, with roughcast gable ends. It features a slate roof with coped verges and integral end stacks. The front of the building has three windows, which are four-paned sashes, along with a central entrance. The interior was not inspected during the survey.
Local climate
Penbryn Mawr sits in one of the wettest parts of the UK, with an average of 1,370 mm of rain a year. This makes it wetter than 97% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 98% of listed buildings.
It experiences an average of 20 freeze-thaw cycles a year, fewer than 78% of listed buildings. Of these, 9 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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