Bryn Deulyn is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 21 July 2000. A C19 House.
Bryn Deulyn
- WRENN ID
- peeling-pedestal-primrose
- 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
- Bryn Deulyn, Nantlle, Caernarfon, Llanllyfni
- OS grid reference
- SH 506 532
- Coordinates
- 53.056, -4.23023
- Source
- Cadw listing
Description
Bryn Deulyn is a two-storey building constructed from snecked rubble slabs, featuring slate hanging on the front of the first floor with bands of green slate, while the ground floor is rendered. It has a hipped slate roof with rendered integral end stacks and follows a double-pile plan. The front has three slightly recessed windows with 16-paned sashes and slate cills on the first floor. The ground floor features a full-width hip-roofed veranda supported by four cast-iron columns, with canted bay windows on either side of the central entrance, which consists of a slightly recessed door with two lower panels and three arched glazed openings above, topped by a plain semi-circular fanlight. The left side of the building is also slate hung.
Inside, there are 19th-century fireplaces in the front ground-floor rooms. The dog-leg staircase has an open string and cut brackets, with stick balusters, two of which are made of iron, and turned newels, the larger of which on the landing may be a replacement. The staircase is illuminated by a tall round-arched window that has the name of Herbert Jones, the son of the first tenant, scratched onto the glass.
Local climate
Bryn Deulyn sits in one of the wettest parts of the UK, with an average of 1,380 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 25 freeze-thaw cycles a year, fewer than 73% of listed buildings. Of these, 12 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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