Ton-eithin is a Grade II listed building in the Caerphilly local planning authority area, Wales. First listed on 16 September 1999. House.
Ton-eithin
- WRENN ID
- dark-portal-sage
- Grade
- II
- Local Planning Authority
- Caerphilly
- Constituency
- Caerphilly MP: Chris Evans (Lab)
- Country
- Wales
- Date first listed
- 16 September 1999
- Type
- House
- Address
- Ton-eithin, Mynyddislwyn, Ynysddu
- OS grid reference
- ST 199 928
- Coordinates
- 51.62874, -3.15846
- Source
- Cadw listing
Description
Ton-eithin is a building constructed of limewashed rubble, featuring a roof made of both Welsh and artificial slate, along with brick ridge stacks, one of which is made of yellow brick. The structure has a roughly T-shaped plan, with the older wing of the house located at the rear. This wing has a renewed window on each floor. Attached at a right angle to this wing is the cowshed, which includes a doorway, a ground floor opening, and a pitching door above.
The front of the building, dating from the mid-19th century, is symmetrical and features 9-pane sash windows at the first floor level on either side of a brick front porch that has a boarded door and a flagstone floor. Below, there are 12-pane sash windows, with some renewal on the left side, all framed with brick voussoirs and stone sills. The attached byre range includes triangular ventilators. Additionally, there is a small single-storey extension from the 20th century on the uphill side.
Local climate
Ton-eithin sits in a wetter-than-average part of the UK, with an average of 1,060 mm of rain a year. This makes it wetter than 85% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 81% of listed buildings.
It experiences an average of 32 freeze-thaw cycles a year, fewer than 59% of listed buildings. Of these, 13 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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