Grianllyn Farmhouse is a Grade II listed building in the Conwy local planning authority area, Wales. First listed on 9 September 1994. Bridge.
Grianllyn Farmhouse
- WRENN ID
- floating-panel-tallow
- Grade
- II
- Local Planning Authority
- Conwy
- Constituency
- Clwyd North MP: Gill German (Lab)
- Country
- Wales
- Date first listed
- 9 September 1994
- Type
- Bridge
- Address
- Grianllyn Farmhouse, Mochdre
- OS grid reference
- SH 828 774
- Coordinates
- 53.28131, -3.75813
- Source
- Cadw listing
Description
Grianllyn Farmhouse is likely from the mid-18th century, although it was later raised in height with the addition of an upper storey. The building has three storeys at the front and one storey with an attic at the rear. It features a three-window range with a central entrance, and each floor has 16-pane sash windows, along with two dormer windows in the roof. The long outshut at the rear, which is mostly the result of alterations likely made in the 19th century, includes a side entrance that appears to provide access to separate labourers’ accommodation, as well as a central door and inserted dormer windows. Inside, there is a curved bressumer over the gable-end fireplace and heavy, chamfered axial beams.
Local climate
Grianllyn Farmhouse sits in a wetter-than-average part of the UK, with an average of 1,100 mm of rain a year. This makes it wetter than 87% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 76% of listed buildings.
It experiences an average of 34 freeze-thaw cycles a year, fewer than 51% of listed buildings. Of these, 18 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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