Carthouse block at Cwm Main is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 31 January 2001. Carthouse, granary.
Carthouse block at Cwm Main
- WRENN ID
- brooding-ember-swift
- Grade
- II
- Local Planning Authority
- Gwynedd
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 31 January 2001
- Type
- Carthouse, granary
- Address
- Carthouse block at Cwm Main, Cwmtirmynach, Llandderfel
- OS grid reference
- SH 925 467
- Coordinates
- 53.0071, -3.60325
- Source
- Cadw listing
Description
The carthouse block at Cwm Main is a rectangular, two-storey structure that also serves as a granary. It features a lower addition that is flush to the left side. The building is constructed from local rubble and has a medium-pitched slate roof. The facade of the carthouse is symmetrical, featuring three depressed-arched entrances with rough-dressed granite voussoirs. Above the two central piers are plaques inscribed with 'E P Builder 1867' and 'R.J.Ll.P 1867'. On the upper granary floor, there are three equally spaced windows with 18th-century wooden cross-windows, which were formerly leaded and appear to have been reused from the farmhouse, along with projecting stone sills. The lower adjoining block has a wide open entrance to the left and two windows to the right. At the rear of the carthouse block, which faces the yard, there is a boarded door to the left and two fixed four-pane windows on the upper floor, situated under the eaves. Additionally, there are three plain entrances to the lower block. The interior was not inspected during the survey.
Local climate
Carthouse block at Cwm Main sits in one of the wettest parts of the UK, with an average of 1,180 mm of rain a year. This makes it wetter than 90% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 78% of listed buildings.
It experiences an average of 50 freeze-thaw cycles a year, more than 91% of listed buildings. Of these, 31 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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