Tan yr Allt Isaf is a Grade II listed building in the Conwy local planning authority area, Wales. First listed on 9 September 1994. House. 1 related planning application.
Tan yr Allt Isaf
- WRENN ID
- twisted-corner-smoke
- Grade
- II
- Local Planning Authority
- Conwy
- Constituency
- Clwyd North MP: Gill German (Lab)
- Country
- Wales
- Date first listed
- 9 September 1994
- Type
- House
- Address
- Tan yr Allt Isaf, 349 Conway Road, Mochdre, LL28 5AG
- OS grid reference
- SH 827 787
- Coordinates
- 53.29297, -3.75997
- Source
- Cadw listing
Description
Tan yr Allt Isaf is a farmhouse, dating to the 18th century, built of limewashed rubble stone with slate roofs and end stacks. The building has a two-storey, L-shaped layout, comprising a two-unit main range and a single-unit wing. The present entrance is located in the angle formed by the main range and the wing, with a secondary entrance on the wing's outer side. The windows are 12-pane sashes on both floors; while those in the main range appear original, the masonry around them has been disturbed, suggesting later alterations. The right-hand unit of the main range sits upon a rough, heavy plinth, hinting at a potentially earlier, separate construction phase.
Inside the main range are roughly chamfered axial beams. The wing contains an axial beam with run-out stop chamfers, and a deep fireplace built into its gable end.
Local climate
Tan yr Allt Isaf 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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- Full EPC report — heating system, energy costs, size, glazing, construction etc.
- Sale history — 1 transaction since 2007
- Related listed building consents — 1 application
- 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
Matched applications, energy data and sale records are assembled automatically and may contain errors. Flag incorrect data.
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