The Old Forge is a Grade II listed building in the Cardiff local planning authority area, Wales. First listed on 31 January 2000. Forge.
The Old Forge
- WRENN ID
- plain-pilaster-violet
- Grade
- II
- Local Planning Authority
- Cardiff
- Constituency
- Cardiff West MP: Mr Alex Barros-Curtis (Lab)
- Country
- Wales
- Date first listed
- 31 January 2000
- Type
- Forge
- Address
- The Old Forge, Capel Llanilltern, Pentyrch
- OS grid reference
- ST 098 799
- Coordinates
- 51.51164, -3.30008
- Source
- Cadw listing
Description
The Old Forge is a small forge dating from an unspecified period. It is a low, single-storey building constructed of painted stone rubble, rendered on the side and pebbledashed at the rear. The main doorway features dressed stone voussoirs, while the other openings have brick voussoirs. The roof is made of Welsh slate and has a central stone stack.
On the left side, there is a basket-arched doorway with double boarded doors, and on the right, a doorway is flanked by boarded openings. A tethering ring is located in the front wall. A channeled stream runs past the right gable end, indicating that the building may have used water power. The left side wall has a ground floor opening with a painted sign that reads "The Old Forge."
There is no access to the interior.
Local climate
The Old Forge sits in a wetter-than-average part of the UK, with an average of 1,110 mm of rain a year. This makes it wetter than 88% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 90% of listed buildings.
It experiences an average of 21 freeze-thaw cycles a year, fewer than 78% of listed buildings. Of these, 8 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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