Ty Mynydd is a Grade II listed building in the Caerphilly local planning authority area, Wales. First listed on 17 December 1998. House.

Ty Mynydd

WRENN ID
weathered-postern-rye
Grade
II
Local Planning Authority
Caerphilly
Constituency
Newport West and Islwyn MP: Ruth Jones (Lab)
Country
Wales
Date first listed
17 December 1998
Type
House
Address
Ty Mynydd, Cwm Pennar, Abercarn
OS grid reference
ST 201 951
Coordinates
51.64977, -3.15599
Source
Cadw listing

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

Description

Ty Mynydd is a building constructed of whitened stone rubble with a stone tiled roof and a central ridge stack. It is built into the hillside and may have originally been designed as a longhouse, with space for animals on the downhill side. The structure is a single storey with an attic and features battered walls. It has an irregular arrangement of altered windows that are set under timber lintels, some of which have hoods.

The interior is said to have once featured a cross passage plan, with the main room and byre open to the roof, although a floor has since been added. Notable features include a four-centred arched doorway leading from the passage, stop-chamfered beams in the main room, a blocked fireplace that backs onto the passage, and a spiral staircase next to the chimney. There were also former buttery and pantry spaces at the upper end. The A-frame roof is mostly modern, but the original truss over the byre has been retained.

Local climate

Ty Mynydd 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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