Capel Seion is a Grade II listed building in the Denbighshire local planning authority area, Wales. First listed on 1 February 1995. Chapel.

Capel Seion

WRENN ID
solemn-cornice-bone
Grade
II
Local Planning Authority
Denbighshire
Constituency
Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
Country
Wales
Date first listed
1 February 1995
Type
Chapel
Address
Capel Seion, Corwen
OS grid reference
SJ 077 435
Coordinates
52.9811, -3.37537
Source
Cadw listing

Also on this page: flood risk · radon risk · weather exposure · detailed attributes ↓

Description

Capel Seion is a chapel built from roughly coursed and squared stone, featuring freestone dressings and a slate roof. The entrance is located in the gable facing the street, consisting of a shallow segmental archway with a stilted hood-mould within a shallow gabled porch projection. On either side of the entrance, there are full-height round-arched window recesses, set back in pointed arched panels. The lower windows have flat stone lintels, while the upper windows feature round arched heads with impost bands. Above the entrance, there is a composite geometric window in a round-arched recess, which includes triple round-arched lights with a continuous impost band and a quatrefoil window above. The chapel displays decorative quoining at the angles and ball finials on the gable coping. The building has five-window return elevations and is two storeys high, with round-arched upper windows and shaped stone lintels for the lower openings. All windows are sashes with margin lights. At the rear, a separate school room forms a range at right angles to the chapel, connected by a single storeyed lobby.

Local climate

Capel Seion sits in a wetter-than-average part of the UK, with an average of 1,050 mm of rain a year. This makes it wetter than 84% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 59% of listed buildings.

It experiences an average of 50 freeze-thaw cycles a year, more than 92% of listed buildings. Of these, 30 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.

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