Seion Welsh Presbyterian Chapel is a Grade II listed building in the Snowdonia National Park local planning authority area, Wales. First listed on 21 February 1996. Monument.
Seion Welsh Presbyterian Chapel
- WRENN ID
- kindled-cinder-dock
- Grade
- II
- Local Planning Authority
- Snowdonia National Park
- Constituency
- Bangor Aberconwy MP: Claire Hughes (Lab)
- Country
- Wales
- Date first listed
- 21 February 1996
- Type
- Monument
- Address
- Seion Welsh Presbyterian Chapel, Rowen, Caerhun, Conwy
- OS grid reference
- SH 758 720
- Coordinates
- 53.2306, -3.86151
- Source
- Cadw listing
Description
Seion Welsh Presbyterian Chapel is a large rectangular chapel, likely built in 1841 when the former Siloam Chapel was repurposed for use as the Women's Institute room. The structure is made of rubble on a low rubble plinth and features a plain slate roof. The entrance front is symmetrical and has plain bargeboards at the gable. There are paired tall, arched windows with 18-pane sashes and radial glazing at the heads, along with marginal glazing. The outer flanking entrances are arched as well, featuring 4-panel raised-and-fielded double doors and radial fanlights. Each side of the chapel—north, south, and west—has three additional arched windows with 20-pane sashes and radial glazing at the heads. All openings are adorned with dressed sandstone voussoirs for the arches and projecting stone cills for the windows. The west gable end is rendered and includes plain stucco stringcourses and architraves. A stone tablet, fixed to the lower left of the east wall, has a dedication inscription in Welsh and reads 'Sion 1819'.
Inside, the chapel has a plain interior with a panelled ceiling and tiered seating that rises towards the west.
Local climate
Seion Welsh Presbyterian Chapel sits in a wetter-than-average part of the UK, with an average of 1,150 mm of rain a year. This makes it wetter than 89% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 80% of listed buildings.
It experiences an average of 40 freeze-thaw cycles a year, more than 78% of listed buildings. Of these, 23 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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- Full EPC report — heating system, energy costs, size, glazing, construction etc.
- Sale history — 2 transactions since 1995
- 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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